Skip to main content

Full text of "73 Magazine (June 1982)"

See other formats 


June  1982     $2,95 


^ 


h 


TVRO  Receiver 


\ 


How  You 
Can  Start 
Building 


0 


74470 


6594 


1 

36 

f 


Build  This 
igital  Vfo 


ICOM  IC-720A 


yiC  QAM 

RFMWEIt 

POWFR 

^^Kg 

SI  HF4 

r 

PUSH-dH                             ^^H   1 

/^ 

^               ACiC 

o 

^m  1 

— 

Msl 

'i..s1 


HF  ALL  BAND  THANSCEIVER 


JMHI 


*   w 


HI? 


OW/OTF 


ATT 


TT"T^ 


ALC  OUP       %SSSt 


VOX       lOfmi 


TfUMSMT 


DIAL  S£L£CT 


T  T  ;?  n 


hroMM 


fIFQAJN 


OdrmuL  cc^nuun 


Miihi  mode 
opwotiofi 

includes  CW/AM/ 
SSD/RTIY  — 
NormatV  used  side 
bond  seteaed 
outomoticolty* 


Continuously  voric^le  power  from 
10W  to  full  power  —  speedi  pro- 
oessof  —  LDA  dionneling  module  in- 
duded  provides  outo  bond  d^onging 
coF>Qbility  when  increosing  your 
power  using  the  I02KL  brood 
bonded  solid  stote  linear. 


<ienefQl  coveroge  receivec  from  o 
0.1  MHz  to  29.999,9MHz  -  Sprit  VFO 
operation  —  Frequency  memorized 
in  standby  VFO* 


vol  lOOHlt 


Simple  to  use  Duoi  VFO's  stondord 

Doto  tronsfer  button  for  moiking  o  fre- 
quency of  Interest  and  storing  it  in  un- 
used VFO, 


rMANfMfT             CW^M 

■IT 

Tt 

dLOCK 

MM   VFO 

4 

u  3 

M 

P 

p 

* 

n 

DfOQcflMnded  soUd  state  ttonsceiver  operatiofi  on  the  9 

omoteur  HF  bonds  —  Readout  of  mode  In  use  ond  VFO 
—  Status  LEDs  for  push  button  functions. 


Use  of  RFfALC  swHdi  in  conjunction 
with  the  interrKil  top  hatch  cover 
switches  ollows  monitoring  relative  RF 
Out,  SWR,  ond  ALC. 


ATT 

Rf        vmm 

^H   1 

^^k  ^^^1 

OH 

ALC       mip 

'                mtmmm     i 

M 

I 


The  ICOM  HF  System.  We  Have  You  Covered. 


NF.'VHF  UHf  AMATeun  AND  MARINfi  COMMUNICATION  EQiJI^MENT 


ICOM 


ICOM  AMERICA,  INCORPORATED 

Sales  Service  Centef^  tocaCcd  «t 

S112l^6t^^^««r*Je^€  333T  1bw«rv<5odDr,SLgie  30? 

BeHevi«,WA  98004  Ckgtes^  TX  7S934 

Pncyie  f  206 i  454-8155  Rione  (514)  620-2T80 


All  »ofed  ^pedHcotiom  Qi«  opptoidinatt  and  iubj^  to  diong^  wtihout  rtotkce  tx  obigatiorir.  AH  ICOM  lOdHod  ^grttncondy  eKcieed  FCC  leguiooom  limhjng  ipunocn  &rnbik?n&. 


'•   -T^     ^  -•-' 


5-STORE  BUYING  POWER  in  action.' 


YAESU 

HAND  HELD's 

2  METER 
FM 

CALL  FOR 
SPECtAL 

PRICES 

70  CM 
FM 


KLM/YRI-EX 

KLM  KT-34A 

4  element  tri -bander 

Regular  ^-»**#» 

$389.95  99U9 

KLM  KT-34XA 


11 


6  element  trf-bander 

Regular 
S569.95 


tit 


KENW 
BIG  FIVE 


Cash  in  on  our  5-Store  buying 

power  Most  items  in  stock 

for  fast  delivery, 

CALL  NOW! 


I 


$469 


FT-208R 


FT-708R 


ALPHA 


ALL  ALPHA  AMPLIFIERS  ARE 

IN  STOCK  FOR  FAST  DELIVERY 

CALL  FOR  SPECIAL  PRICES 


MIRAGE  B-1016 

2  METER  AMPLIFIER 

160W  OUTPUT, 
,  FM,  CW. 

Freq.  range:144-148MHz  •  RF-  out:160W  nam. 
(10W  in)  •  RF  power  in.  5-1SW»  DC  operating 
pwr:  i3.BVDC(Si20-25A«  Inrermilteni  duty 
cycle*  Buitt-in  receiver  pre- amp  Auto- 
matic internal  or  external  relay  keying. 


REGULAR 

$279.95 


$249.95 


KLM  7.2-1  40M  rolatable  dipole. 
Regular  $199.95    Special  $159.00 

KLM  7.2-2 40M,  2  elemerft  beam. 
Regular  $349  95     Special  S299.00 

KLM  7.2-3  4QM,  3  element  beamj 
Reguiar  S529.95    SpecJaf  S449. 

KLM  7,0-7.3  4A40M.4  eJemenl  beam. 
Regular  S749.95    Special  $€29, W. 

144-148-13LB.  2M,  13et.long  boom. 
Regular  589,95       Special  $77.95 

432-16LB  432MHz,  16  eL  long  boom. 
Regular  $74.95      Special  $60.70 

144-150-16C.  2M,  16  eL  Cir  poj, 
Regular  $1 16.95      Special  $93.55 

420-450-18C  435  MHz  18  #1.  Of  pol. 
R^ii3ar  S69.95      Special  $58.70 

TBI-EX  W51 ,  51  too*  tower. 
Regular  $999,95    Special  $829.95 

W51  TOWER  w/  KT-34A 

$1099 

W51  TOWER  w/  KT-34XA 

$1239 

PRICES  ARE  FOB  CALIFORNIA. 

ON  ANTENNAS  &  TOWERS 
«ife»pt  for  cartam  combinatiom.  Ptui*  inquira. 


==-G-  J  i 


TS-930S 


t^eits 


^-  € 


\J>.' .;  ■  •  ■ 


TS-130S 


TR-2500 


M 


TR-7730 


f 


c 


TS-830S 


ALL  USTED  ANTENNAS /TOWERS  IN  STOCK.,, no  wait. 


:i 


SERVING 
BETTER. 

Boll  Ferrero.WGRJMKiAHV 
Jim  Raft»rty,  Ni 
ottief  well  known  riai„ 
give  you  courteous,  i 

persona!  jzed 
service. 


PHONE 


800 


854-6046 


9:30AM  to  S:30PM  PACIFIC  TIME. 
OVER-THE-COUNTER,  10AM  to  5:30PM. 

MONDAY  THROUGH  SATURDAY 

CAUFOflNIA  CUSTOMERS  Pi£AS£  PHONB  OH  VISIT  USTED  STOftES 

FREE  SHIPMENT 


(U.PS,  Brown) 

CONTtNENTML  U  SA 


QOM 


"ma 


OUTLET 


ANAHEtM,  CA  92001 

2620  W.  La  Palma. 

(714)  761-3033  (213)  660-2040 

Set  ween  Disneyland  &  Knott  s  Berry  Farm 


BURLINGAME.  CA  94010 

999  Howard  Ave.,  (4^5)  342-5757 
5  miles  south  on  101  from  S,F  Airport. 


OAKLAND,  CA  94609 

2811  Telegraphk  Ave.  (415)  451-5757 
Hwy  24  Down  IOWA   Le*t  27th  otf-ramp- 

AE  A  -  ALLIANCE  -  A4  ^HA  ■  AMeCXJ- AMPNEPM31  -  MWH.^  ASTRON 
^AvAMTi-BENCHfft^  MflK  TEM'@tB0-BiW-CALiBOO**COi 
-GOUJMS-COaC^Uftt^  -COSHCAAFT^  OAlWA  '  DATOfwa 


SAN  DIEGO,  CA  92123 

5375  Kearny  Villa  Road  (714)560-4900 
Hwy  163  &  Clairemont  Mesa  Blvd. 

t>0«T1tD*t-OnJUCE<DllEJMO4MECIttMO  -  ElHAC  "  HUSTLfn 
HV-<»««-lCOV' JWMIIX£n-KEf>4WOO0'  KLM  -  lAASEli 
LUNAfI    '  lil£TZ  '   liFJ    -    lilCf*0-  UOO  -  WIWI  -PHOOUCTS 


VAN  NUYSp  CA  91401 

5265  Sepulveda  8lvd  ,  (213)  988*2212 
San  Diego  Fwy  af  Victory  Blvd. 

-4MltMlE-   NVC  '  PMjO«4AII-P1<a#Ot>ROHN<SHU^«^SMAh 
>  TELEX  '  TELR£3I*  rEMPO<  TEN-TEC*  TT^TAO 
- VA£SU, 


Pnc9S.  spmcttfcmtons.  deidtptions  subf&ct  to  changa  wtthoift  nottc*.      C^t.  f^stdtnis  pl^^se  add  salo^  i4Ut 


i 


■^ 


INFO 


Manuscripts 

scripts  iMiih  <tr3wifici.s  and^r  phofo- 
graphs  m^  lArelcome  and  w^iii  be  con- 
sidered tot  fKXSS£bi«  piibiicatton  Wfi 
can  aasum#  no  responsibility  Ii^h  loss 
or  damage  to  any  maTerial  Please 
enclose  a  stamped,  self  addressed 
envelope  wittii  eacfi  subrrvisston  Pay- 
mem  for  the  use  of  any  unsolicil6d 
iTTiaTeriat  will  be  made  upon  accep' 
lance  AH  GDnrributidns  sihoutd  be  di' 
reeled  fo  the  7J  edPtonai  ofMces 
"How  to  Write  for  73"  gyideHnes  are 
avaNabre  upon  request 

Editorial  Offices: 

Pine  Street 

Peter  bo  rough  NH  0345a 
Phone  503^924-94  n 

Advertising  Offices: 

ETffi  Street 

R$lefCKirough  NH  CO4S0 

Pnone  S03-S24-7138 

Circulation  Offices: 

Bm  Srreet 

Pelerbofougfi  NH  IB4S8 

Phone  fi03-924-947l 

Subscription  Rates 

In  Itue  United  Slates  and  Possessions: 
One  ¥eaf  n2  rssuesi  $25  00 
Two  Years  124  issues!  S3d  00 
Three  Years  136  tssoest  S53.0Q 

Elsewhere: 

Ctnada— $27  97ft  year  o(^iy.  US 
tyndS.  Foreign  surface  mail— i44  9?/1 
year  only.  U:S.  funds  drawn  on  US. 
bank,  Foreign  ait  mail— please  inquire. 

To  subscribe, 

renew  or  change 

an  address: 

Wrlile  to  73  Magaitfje,  SubscnpHon 
Department.  PO  Bok  931.  Farming. 
dale  NV  11737  For  renewafs  and 
G Ganges  of  address,  include  the  ad' 
dress  iAb&\  frt^m  yoyr  most  recent 
issue  of  73  For  gift  subscrtpiions.  in- 
eludfi^  your  name  and  address  as  meii 
as  those  o1  gift  recipientG  Postmaster 
Send  form  #3579  to  73  M^gazme,  Su^ 
scrjpiron  Services.  P.O  Bo»  931  ¥vm 
moEjale,  NY  11737 

Subscription 

problem  or 
question; 

V¥ftte  10  73  Magaitfie.  Subscription 
CS^patlrrs^fil  PO  Bojt  931.  Farmmgda^e 
NY  11737  PJease  mclude  an  adcttess 
latiel 

73  Msgaiifie  (ISSN  0098-9010)  is  py&. 
I i shed  monttily  by  73.  Inc  .  a  subsidiary 
0I  Wayne  Green.  Inc  .  BO  Pme  Sireet, 
Peterborough  nh  034 5Q  Second  class 
postage  paid  at  Peterborough  HH 
03458  and  at  additional  mailing  off rces 
Entire  conients  copyrighl  1982.  Wayne 
Green,  \r\c,  All  rights  reserved.  No  pari 
of  this  pubiiicatlon  may  be  reprinled  or 
Qlherwise  reproduced  without  writteni 
permission  from  ine  publisher  Micro* 
film  Edition  — UnlwersEty  MicfOfMm. 
Ann  Arbor  Ml  4810S. 


When  it  comes  to 

AMATEUR 
RADIO  QSL's 


its  the 

ONLY  BOOK! 

US  or  Foreign  Listings 


1982 


Here  t^ey  are!  The  latest  editions.  Wortd- 
famout  Radio  Amattur  Cat  I  books,  the 
most  respected  and  comptete  listing  of 
radio  arnateurs.  Lists  calls,  license  classes, 
address  Information.  Loaded  with  special 
features  such  as  call  changes,  prefixes  of 
the  world,  standard  time  charts,  world* 
wide  QSL  bureaus,  and  more.  The  U,5. 
Edition  features  over  4QQ,000  llstEngs, 
with  over  70,000  char^ges  from  last 
year-  The  Foreign  Edition  has  over 
370,000  listings,  over  GO.OOO  changes. 
Place  your  order  for  the  new  1982  Radio 
Amateur  Callbooks,  available  now. 

fach      snipping      Tent  ail 


rj  u&Ceiibtieh 

Zi  Foreign 
OmOBSk 


%IBS5    $3.05  S22.0O 
$17.95    $3.05   $21.00 


Order  both  books  at  the  same  time  for 
$39.95  Including  shipping. 

Order  from  your  dealer  or  directly  ^rom 
the  pubrisher.  All  direct  orders  add  shipping 
charge,  ForeJgr>  residents  add  $4.55  for 
shipping.  liUnols  residents  add  5%  sales  tax. 

SPECIAL  LIMITED  OFFERi 

Amateur  Radio 

Emblem  Patch 

only  $2.50  postpaid 


Pegasus  on  blue  field,  red  lettering.  3**  wide 
X  3"  high.  Great  on  Jackets  and  caps. 

ORDER TDDAY! 


nkm  AMATEUR  1 1  I 


^ 


Ic 


INC. 


Oept.      5 

925  Sherwood  Drive 

Lake  Bluff,  IL  60O44,  USA 


*^&l 


I 


S\A/R  Gl  Power 
Metier 


•  The  most  advanced 
automatic  computing  RF 
measuring  instrument  in 
amateur  radio. 

•  Logarithmic  SWR  scale, 

•  Power  ranges  20/200/2000 
watts. 

•  Frequency  range  1-30 
MH2. 

Automatic.  No  "set"  or  "sensitivitv** 
cor>tfoL  Computer  sets  fyll  scale 
so  SWR  reading  is  aiways  right. 
Compiete  hands-off  operation. 

Lffht  bar  display.  Gives  instant 
response  so  you  can  see  SSB  power 
peaks  Much  faster  than  old-fashioned 
panel  meters  Baton  switch  selects 
three  power  ranges. 

Logsrithmic  SWR  display.  Computer 
expands  the  display  where  you  f^eed 
it  so  it's  easier  to  see,  easy  to  use. 

Computer    operattd.    Now    an 

analog  computing  circuit  and  digi^ 
comparator  automatically  compute 
SWR  fegardless  of  power  level.  Frees 
you  from  checking  zero,  setting  a 
'^sensitivity"  knob  and  from  squinting 
at  old-fashioned  cross  pointer 
mechanical  meters.  With  this  new 
meter  computing  is  done  electronically 
and  displayed  with  moving  Ifeght  bars, 
Individual  bars  for  SWR  and  power. 

Compact,  attractivQ.  The  new 
SWR  A  Power  meter  is  in  a  4X4X5 
snch  metal  case  with  brushed  aluminum 
panel  and  black  vinyl  cover  Red  light 
bars.  Baton  switches.  For  115-v 
50/60  Hz. 

Mddel  M-&27  Automatic  SWR  & 
Power  Meter  $97.50  In  the  U.S  and 
Canada.  Add  S3  shipping/handfing. 
California  residents  add  sales  tax. 


Mv/lnCa4 


ORDER  YOURS  NOW! 


Palomar 
Engineers 


1924*F  West  Mission  Road 
Escondfdo,  CA  92025 
Phone  (714>  747-3343 


4     73  Magazine  •  June,  1982 


r 


Build  This  Digital  Vfo 

—  a  microprocessor  makes  it  simple 

WA5VQK 


F  4  f-  T  I  I  I- 


12 


Surviving  the  Unthinkable 

—part  1 1:  some  practical  ideas.        AK(?Q 


30 


/ane  82 

MAGAZINE 


'Lite  Receiver  IV 

—  the  second  half 

WA4CVP,  WA40SR 

TVRO  Transducer 

0  —wavegu  ide-to-coax  transition 

WA4CVP,WA40SR 

The  MTV  Music  Box 

—  Satell  ite  Central,  part  V 1 1 

Gibson 


52 


58 


60 


Vol.  XXII  No.  9 


A  Split  Personality 
for  the  KDK  FM2015R 


Building  for  Beginners 

—happiness  is  a  hot  soldering  iron 


N1II 


Coping  with  PC  Boards 

—  it's  not  easy  to  be  virtuous KC7M 


40 


42 


48 


Tune  In  the  World's  Tinderbox 

— SWUng  from  Cairo  to  Kuwait 


4         *        I         I         ■         I         I-         I 


Are  You  Ready  for  900  MHz? 

WB4LNM 

Crime-Stoppers'  Textbook 

—  rules  of  thumb  for  would-be  gumshoes 

..-,..  Diefenbach 


66 


74 


84 


Never  Say  Die—  6,  Ham  Help  — 64, 92, 94, 95, 108, 118,  Corrections  — 64, 96,  Social  Events  — B8,  Satenites  — 97, 
Fun -98,  DX-99,  Letters- 101,  Contests- 104,  Awards- 106,  Reader  Service- 114,  Review-115,  New 
Products  — 119,  Dealer  Directory— 162,  Propagation— 162 


T3  Magazine  •  June,  1982    5 


W2NSD/1 

NEVER  SAY  DIE 

editonatl  t>y  Wayne  Green 


HOOKED 

You  know,  after  over  forty 
years  of  hamming  I  still  don'l 
know  exactly  what  it  is  that 
grabs  the  interest  of  a  teenager 
and  turns  him  from  a  normal  rot- 
ten kid  into  a  raving  electronic 
maniac,  I'm  told  by  the  dodder- 
ing grey-bearded  otd-limers  who 
have  taken  over  most  of  the  ham 
clubs  in  the  country  that  young- 
sters are  exposed  to  the  whole 
world  on  television  and  thus  find 
little  exciting  about  talking  to 
weird  places. 

Hmmm.  I'm  not  convinced. 
No,  amateur  radio  didn*t  gradu- 
ally die  off.  It  was  killed  with  one 
blow  back  in  1963.  Before  that  it 
had  been  growing  at  11%  per 
year  for  17  years,  right  on  up 
through  the  evolution  of  televi- 
sion. TV  never  even  stowed  it 
down. 


My  first  exposure  to  amateur 
radio  must  have  made  a  strong 
impression,  because  after  50 
years  I  still  remember  it.  Yep, 
sonny,  I  was  a  shaver  of  ten  and 
while  visiting  the  best  friends  of 
my  grandparents  In  Bethlehem, 
New  Hampshire,  I  met  Harry 
Stevenson  WiCUN.  His  mother, 
along  with  Johnny  Macauley, 
ran  the  Valley  Vrew  Inn.  That 
was  back  in  the  heyday  of  hotels 
in  Bethlehem.  .  .30  hotels  and 
100  rooming  houses,  the  bill- 
board at  the  entry  to  town  said, 

Harry  was  sitting  there  laconi- 
cally talking  on  a  75m  rig. .  .a 
breadboard  construction  with  a 
big  copper  tube  final  coil  He 
didn't  pay  a  lot  of  attention  to 
the  visiting  kid.  It  didn't  occur  to 
me,  at  ten,  that  I  might  ever  be 
able  to  understand  the  wizardry 
of  Ihat  mass  of  wires  and  tubes. 


HOME-BREW  CONTEST  WINNERS 

•  1st  place,  $250  prize:  '*Smart  Squelch  for  SingleSideband 
Receivers"  by  Frank  Reid  W9MKV  and  David  Link  W9YAN, 
both  of  Bloomington  IN. 

•  2nd  place,  $100  priie:  '*SjX'Meler  Double-Sideband  QRP 
Transmitter"  by  Larry  Jack  KL7GLK  of  Annapolis  MD. 

•  Honofable  mention,  S50  each:  "MB-1  Function  Circuit"  by 
Mike  Strange  WA2BHe.  Pine  Hill  NJ.  "Splattomeler"  by 
Penn  Glower  W1BG.  Andover  MA,  and  ^Weather  Converter 
for  Your  Two-Meter  Rig"  by  Paul  Danzer  N1II,  Norwalk  CT. 
We're  sure  you  have  heard  it  said  that  "hams  are  not  build- 
ing anymore;  they're  |ust  appliance  operators."  Well,  73's 
Home-brew  Contest  proves  that  rumor  to  be  baloney.  We  were 
literally  buried  with  entries.  The  winning  projects  show  that 
hams  are  not  only  building,  but  that  they  are  still  innovatmg, 
too. 

Our  editorial  staff  burned  the  midnight  oil  in  early  April, 
choosing  five  finalists  from  more  than  100  entries.  The  win- 
ners were  then  picked  by  three  of  75's  veteran  home-brewers: 
AG9V,  K1XR.  and  W1Xa 

The  Home  brew  Contest  winners  will  be  published  in  future 
issues  of  73.  In  the  meantime,  keep  your  soldering  iron 
hot — 73  is  having  another  contest.  This  time  there  will  be  a 
$50  limit  for  the  projecfs  parts. 


Like  a  time  bomb  ticking 
away,  that  experience  fay  hid- 
den, waiting  for  the  spark  of  pu- 
berty to  set  it  off.  By  14, 1  was  a!* 
ready  familiar  with  the  excite- 
ment of  the  police  calls  at  the 
top  of  the  broadcast  radio  dial. 
Then  all  it  took  was  an  exposure 


to  a  fantastic  radio  my  grand- 
father in  Littleton.  Hew  Hamp- 
shire had. .  .with  a  shortwave 
band  on  It!  Wow!  There  were  all 
those  foreign  broadcast  sta- 
tions. .  .and  a  myriad  of  hams.  I 
was  a  roly-poly  kid.  but  the  fami- 
ly still  had  trouble  tearing  me 
away  from  the  twenty-meter 
ham  band  to  eat. 

It  was  at  just  this  juncture 
that  some  fiend  dumped  a  box 
of  radio  parts  in  my  lap  one  Sun- 
day at  church.  Most  of  the  parts 
were  brand  new  and  in  their  orig- 
inal cartons,  so  1  couldn't  just 
throw  them  away.  Oh,  f  tried  to 
sell  them  to  the  local  radio  re* 
pairman  (now  gone  the  way  of 
the  ice  man},  but  he  sneered  at 
the  parts  as  antiques.  Popular 
Mechanics  had  a  radio  con- 
struction project  each  month, 
many  of  them  using  parts  |ust 
like  those  in  my  collection,  so  1 
put  together  a  radio  in  an  old  ci* 
gar  box. .  .and  unfortunately  It 
worked.  I  was  hooked. 


%l  HOME-BREW  II  CONTEST  SS 

Between  now  and  October  1,  well  be  looking  for  articles  de- 
scribing  the  best  home-brew  projects  in  the  land  for  under 
$50.  All  useful  projects  will  be  published  In  73,  and  the  cream 
of  the  crop  will  share  $5€0  in  cash  prizes.  Top  prize  in  the  con- 
test  is  S250.  wilh  SI 00  going  to  the  second  place  project  and 
S50  to  each  of  three  honorable  mentions.  These  prizes  are 
over  and  above  the  payment  that  all  authors  receive  for  hav- 
ing their  articles  published  in  73, 

Contest  Rules 

1.  All  entries  must  be  received  by  October  1, 1982.  To  enter, 
write  an  article  descrrbing  your  t>est  home-brew  construction 
proiect,  and  submit  the  article  to  73  Magazine.  Any  construc- 
tion article  received  before  the  October  1  deadline  is  automat- 
ically entered  in  the  contest.  Any  entries  for  the  first  Home- 
brew Contest  which  meet  the  S50  requirement  for  Home-brew 
II  will  be  automatically  entered.  If  you  haven't  written  for  73 
before,  please  send  an  SASE  for  a  copy  of  our  author's  guide. 

2.  The  total  cost  of  the  project  must  not  exceed  $50,  even  If  all 
parts  are  purchased  new.  Be  sure  to  include  a  detailed  parts 
lisL  with  prices. 

3.  All  parts  used  in  the  project  must  be  available  to  the  aver^ 
age  radio  amateur  or  electronics  experimenter;  To  be  on  the 
safe  side,  include  sources  for  any  unusual  components. 

4.  Projects  will  be  judged  by  the  73  technical  staff  on  the  ba- 
sis of  usefulness,  reproducibility,  economy  of  design,  and 
clarity  of  presentation.  The  decision  of  the  judges  is  final 

5.  Ail  projects  must  t>e  original,  i.e.,  not  previously  published 
etsewhere, 

6.  All  rights  to  articles  purchased  for  publication  become  the 
properly  of  73  Magaztne, 

Send  your  entries  to: 

Home-Brew  II  Contest 

73  Magazine 

80  Pine  Street 

Peterborough  NH  03458 

Winners  will  t>e  announced  in  the  December,  1982,  issue  of 
73.  Hme  fun! 


6     73  Magazine  •  JuneJ982 


®KEI\l\A/aOD 

^Wi       . .  <  toacesetter  in  amateur  radio  I 


R-iaao 
^30f "  OFF 


CASH 
NOW! 


ASK  YOUR  DEALER  FOR  DETAILS 


^30P°OFF 

WITH  OR  WITHOUT 

MC-46 


TS-i30SE  or 


nSP^OFF 


OFF 


Participating  Trio-Kenwood  Authorized  Dealers: 


^ABAMA 

.ong's  Ettctronics 

Nrmingham,  AL  35233 
205J  252  7589 

aASKA 

l«llsl»i«  Else  Ironies 

.ncnorage.  AK  99503 
9071  2T§'5100 

Lf^lZONA 

*&mmr  CorfimunTcatFons 
.    .  ;i-§268 

:aufornia 

1am  Radto  Otitltt 
^Lirijngame.  CA  940t0 

lam  Rad^Q  Dvttftt 

■an  Diego.  CA  92123 
714J  560-4900 
lam  Racffo  OulTat 

'an  Nuys,  CA  ^jE40] 
213)  9a8'2ai2 
lam  Radio  Ouli«t* 

Jakiand,  CA  94609 
415J  ^51-5757 

lam  Radio  Outlat 
.nahejm.  CA  92801 
714)  761  3033 
lenry  Radio,  Inc. 
05  Ano^ies,  CA  90025 
21 3>  620-1234 

lenry  Radto  ^  Electronics 
j\arieim.  CA  92S01 
714)  772-9200 

COLORADO 

W  Etectr&nic  Salas  Co. 
leflvet  t      -   2Q2 
303!  832  nil 


I   FtORrOA 
Amatour  Electronic 
Supply 

Orli^ndo.  FL  32B03 

^305j  894  r??38 

Amatttur  Radio  Canter 

M^ami,  ft  33137 
(305)  573-6383 

HAWAIt 

HcMioliiiu  EJactronJcs 

Honolulu.  Hr  96814 
CBOS)  949-^564 

mAHO 

Roaa  Diitributlnp  Co. 

i.        ^52-0630 

ILLINOtS 

Erickson  Communications 

Chicago.  IL  6G630 

(312)  631  5181 

INOSAWA 

Graham  Electronics 

fndianapolis,  llsr  46204 

(317)  635-5453 

Hopaler  Efectronlca 

Teiffcf  haute.  IN  47802 

(812)  238  1456 

Krydar  Electronics 

Fort  Wayne.  IN  46S15 
(219)  485-6434 

IOWA 

Hit  In^orppfat^d 

Couf»Cpi  Bluffs,  rA  51502 

(712)  323014 2 

KAIISAS 

Awoctotad  Radio  Conun. 

OveflsfKJ  Park,  KS  66204 
(91 3j  381-5901 


MARn AND 
Electronic  Int'i  Servic* 
Wheaton.  MD  20903 
(301)  946-10S8 
Tha  Comm.  Center 
Laurel,  M:D  20B10 
(301*  792- 0600 

MICHIGAN 
Rad^Q  Supply  & 
Engtnaafing 
Deifoit.  V;  -   . 
(3T3J  435-5660 

MINNESOTA 
Midwest  Amateur 
Radio  Supply^  incr 
Mmneapolis.  MM  55142 
(612)  521  4662 

MISSOURI 
Kam  Radio  Center 
Si  Louis,  UO  63132 
(314)  993-6060 
Hanry  Radro  Company 
Butler,  MO  64730 
(816)  679^3127 
MldCom  Electronic  a 
Si.  Laijis,  MO  63144 
(314)  961-9990 

MiMourl  Radio  Center' 

Kansas  City.  MQ  d4150 

(816)  741  811  a 

MONTANA 

Conlay  Radio  Supply 

Billings.  MT  591 OT 

(406>  259-9554 

Communtcelions  Center 
LmcoTn,  NB  68506 
(403  476-7331 


NEVADA 

Amateuf  Electronic 

Syppty* 

Las  Vegas.  NV  89106 
(702)  647-3114 

NEW  HAMPSHIRE 
Tuffi  ftadio  ft 
£i«ct.  Supply 
Hudson.  NH  03051 
(6031  BB3-5005 

NEW  IIEXiCO 
Eiactronfc  Modula 


z  tj  "■  I 


(505)  3^ 

NEW  YORK 

Adirondack  Radi|»S|ippjy 

Amsiertlani.  Hi  12010 
fSiRi  eJ2-fl3'^f^ 
Narrifron  Radio  Corp< 
Long  JslanaNY  11735 
f5T6)  293-7990 

Radio  World 

Ofiskany.  NY  13424 
(315)  736-0184 

OHIO 

Amateur  ElectronJc 

Supply 

Wicklille,  OH  44092 
(216)  585-7388 
Srepco  Electronic 8 
Dayton,  OH  4  54  04 

(513)  234^0B7T 

Universal  Amat«i^r 
Radio.  Inc. 

ReynoWsDurg,  OH  43068 
(614)  8&6-4267 

.=    ."-.        ■  -I       '   :     f     .fc  .    -^ 

Derrick  Electron  tea' 
Broken  OK  74012 

(918)  251-9923 


RadEo,  Inc. 

Tulsa,  OK  74119 
(918)  587-9123 

OREGON 

Portland  Radio  Supply 

Portland.  OR  97205 
i503j  2288647 

Hamt  ron  i  cm  /  Tr  e  vos« 
Trevose.  PA  1904  7 
(215)  357-14D0 
J  JtS.  DiatrtlHit<ira 

York,  PA  17404 
(717)  854-8624 

SOUTH  CAROLINA 

G.I.S.M.O. 

Co  m  mu  n  icatlona 

K:j€(^n=ij,  SC  29730 
(803)  386-7157 

SOUTH  DAKOTA 
Burghardt  Amatvur 
Cwitar 

Watertown,  SO  57201 
(605)  866-7314 

TENNESSEE 
Amateur  Radio  Supply 
of  Na»Hvlll0 

Maaison.TN  37115 
(615)  868^4956 
Memphis  Amateur 
Electronic* 
Wempms.TN  38108 
(901)  683-9125 


TEXAS 

Douglas  Etecfronics 

Corpus  Cnu^ili,  TX  78404 
(512)  883-5103 
Electronics  Canter 
Dallas,  TX  75201 
(214)  526-2023 

Hardin  EI»Glronte« 

Fr  Worth.  TX  761T2 
(fl?7)  429-9761 
Madison  EtectronJcm 
Houston,  TX  r/010 

Kennedy  Aasociatea 

San  Anlomo.  TX  78222 
(512)  333-6110 

WASH1II6TON 

A^-^  Communtcatfons 

Seattle,  WA  98^55 
(206>  364  8300 
Amateur  Radio 
Supply  Co, 

Seatue.  WA  98108 
(206)  767-3222 
C-COMM- 

Seattle,  WA  98107 
(206)  764-7337 

WISCONSIN 
Amateur  Elaetronic 
Supply 

Milwaukee.  Wl  53216 
(414)  442-4200 


"interim  Dealers 


♦ 


lis  KENWOOD  BONUS  BUCKS  coupon,  ^Hen  presented  to  any  factory  ijuthorized  deader 

TRIO  KEN WOOO  CGMMUNiCAnONS  products,  may  be  usedas  partial  payment  in  the 

lounl  of  S30  00  toward  the  purchase  of  any  new  KENWOOD  model  R-iOOO,  TR'8400.  or 

1-7730  wilh  MC-46  or  basic  UP'DOWN  fr^'CfOphone.  Of  may  be  used  as  paftiai  payment 

the  amount  of  S15  00  low  as  a  of  ar^y  new  KENWOOD  ff*odel  TS-130S. 

'  3DSE.  or  T5-S30S  amateur  ;  nrodui^t   The  pixrchiiso  mu£l  be  made  during  the 

d  March  V  Ihrough  June  15.  I§a2.  The  customer  must  present  a  sefjarate  coupon 

i^nly)  for  oAch  of  the  i  models  tieing  purchased  AdUihona)  coupons  are  awailatsle 

—  lythofi^ed  dea>-„-r^  iftlO-KENWOODassu^    "  ^  ■^■"rionstpiiity  for  themaD*iity 

:  ^eaiersor  o*  ''=^^'f  **^  h-r   vur  any  spec'-  ,  .♦ilhin  the  n^sr^od  specified 

<ne  Offer        ^  'r^e'JSA  v  tajted  or  p  led  by  law 

ife  n  e  to  pa^^hcipat©  ti  Thts  coupon  is  e  part  of  TRIO- 

ENWOOO  COMMUNiCATlONS  'BONUS  SUCKS"  sates  program  It  has  no  value  tif^ess 

hjnitted  m  compliance  with  the  rules  oi  that  program  pnot  to  June  tS,  1982, 

KE  N\A/a  O  D 


/        /1 982 

Model  Purchased 

Date  Purchased 

Deafer  Name 

Customer 
Neme: 


,  Cat!  S*f|n 


Address 
City: 


Slat 


Customer  Signature: 


TRIO-KENWOOD  COMMUNICATIONS 

1111  West  Walnut.  Compton,  California  90220 


Good  Mar.  1  through  Jiin.  15, 1982 


^^^^^^^^^■^ 


m 


STAFF 


Al  15,  !  was  busify  boolleg- 
ging  on  40-meter  CW  with  my 
Hailicrafters  SX-19  receiver  and 
a  homemade  6L6  rig.  \  was  pret* 
ty  good  al  the  code,  but  every 


The  ham  DXing  originafly  got 
me  interested,  but  I  didn't  get  in- 
lo  that  aspect  of  it  until  years  la- 
ter, 1  was  mostly  active  in  my 
early  days  on  160m  and  2 Vim. 


don't  know.  .  .and  that  mtght  be 
some  of  the  reason  for  our  low 
level  of  newcomers.  Still,  with 
the  entry  mto  amateur  radio  now 
al  five  words  per  minute  and  the 


f 


i 


I 


'Jk 


Meet  the  new  ICOM  220  MHz  IC- 
/.  Providing  full  coverage  of  the  220  MHz 
bandj  the  IC-3  AT  is  similar  in  appearance  and 
size  to  the  popular  IC-2AT-  All  accessories, 
including  batter>*  packs,  chargers,  microphone> 
etiSilife  completely  compatible  bet^^een  the  tw^o 


I 


The  IC-3flKnciudes  a  16  button 
Touchtone®  Pad  and  covers  220  to  224.99MHz 
both  simplex  and  duplex  operation.    The 
IC-3AT  system  comes  complete  w^th  IC-BP3 
NiCd  battery  pacJc^C  wall  charger^  belt  clip, 
"rubber  duckie"  anWisi  strap  all  standard  at 
no  extra  cost.        'il 


i 


mm 


m 


NM 


* 


mmm 


I 


^mmmmmm 
wmmmm 


^mm 


m^f^t^^^in 


■■i 

1^ 

1 

E^ 

>Jr-*        _  •      "^     - 

i 

'^M  I 

jjjp^jIfpi^^Wi^ 

'  1,  J 

^^^^^^^^^^^^Li^^^^^^^^E^^^^^I 

K 

■*!    fc 

) 
J 

m 

) 

X 


"^p 


mmmammnftm 


id-'*  "' 


M 


^tm 


^^mmti 


mm 


irmm^tKr^ 


M«P>«MpNil^ 


TP**^ 

Lmm. 

m 

i^i 

M^ 

m 

B 

7 


B 


m  c 


u 


IC-2AT 


IC-3  AT 


n.  , ' ."^  T  ■ 


ICOM  VHF  Mobile  Performance  at  a  Budget  Price 


»4   A 


LA 


^to«f    iO«  ♦ 


.♦ii 


t. 


^^^^^ 


B  9   7 


^tmt    LOW 


AHHM 


1 

fl 

flE« 

i  h 

.^^I-^^P" 

M 

IBB 

Fl 

PaJ 

£» 

OUFV 


Imagine  lO-ZZS^performance  and 

simplicity.  .  . 
plus  800  channels .  . . 


,Easy  to  Operate* 

Convenient  pushbutton  frequency 

selection 

Monitor  repeater  inputs  at  the  flip 

of  a  switch 

Hi/Low  power  pushbutton 

selectible 

Touch  Toneg)  available  with  optional 

HM8  microphone 

Convenient  hookup  points  for  sub* 

audible  tone  encoder  or  continuous 


tone  controlled  squelch  system 

•  5  KHz  step  (800  T/R  channels 
standard) 

•  Covers  the  complete  144-147*995 
MHz  ham  band 

ICOM  Performance* 

•  5  helical  resonators  for  outstanding 
selectivity 

•  Continuous  duty  rated  10  watt 
transmitter  —  rugged  performance 

•  Excellent  receiver  sensitivity 


•  Patterned  after  ICOM  s  extremely 
successful  and  reliable  IC-22S, 

•  APC  circuit  for  protection  of  finals 

Versatile* 

•  Easily  set  up  for  CAP/ MARS  use 

•  8  pin  mic  connector 

•  9  pin  undedicated  accessory  socket 

•  Remotable  frequency  selection 

option  (  Ex- 199J 

•  Compact  size  [62  in  (W)  x  2.3  in 
(H)  X  8.6  in  (D)] 


ICOM 


2112  -  116th  Avenue  NE,  Bellevue  WA  98004 
3351  Towerwood  Dr.,  Suite  307,  Dallas,  TX  75234 


All  itfltcd  iiH^Eiincaiiani  axv  appn^ximaie  and  '^uKjcfut  tu  cKiirLMv*  wiiKout  nf»ti«r  iir  obll|$A[lcin,  All  ICOM  rfldia*  ilKnincantlv  r?tce«d  FCC  rf*|tu1«tli3ni  LlmltlryR  apui-ioui  emUdiutiA. 


Ttm  Ahrem  WA5VQK 
MiCFocomponvnt  Applications 

Ingmeer,  Moforoia 
3501  Ed  Bfuestein  8hd 
Austin  rx  7B72t 


Build  This  Digital  Vfo 

a  microprocessor  makes  it  simple 


Ed.  Note:  The  MC6S05T2L2  microprocessor  IC  used  in  this  |Mio|^t  mtxsl  to  ordered  directly  from  Motorola.  Send  a  mofwy  order  only  (no 
checks)  for  $1 1.50,  payable  to  Motorola,  to:  Ttm  Ahfens,  Motorola,  3501  Ed  Bluesteln  Blvd.,  Aystin  TX  78721,  Attention:  MalL  Stop  L  2787. 


This  article  describes  a 
microprocessor-con- 
trolled vfo  which  may  be 
used  as  a  remote  vfo  for  ex- 
isting stations  or  incorpo- 
rated into  new  radio-system 
designs.  The  vfo  features 
ten  battery-backed'Up 
memories,  keypad  entry  of 
frequency,  up/down  scan- 
ning, a  real-time  clock,  plus 
a  liquid  crystal  display- 
As  a  remote,  the  vfo 
tunes  from  5  to  6  MHz  in 


100-Hz  increments  and  is  di- 
rectly compatible  with  ra- 
dios which  use  a  5-to-5.5- 
MHz  internal  vfo  (e.g., 
FT'107.  FT-707.  etc.}.  If  us^ 
ing  one  of  these  radios,  only 
small  modifications  within 
the  radio  are  required  to  al- 
low the  remote  vfo  to 
change  bands  at  the  touch 
of  a  finger! 

Microprocessor  Selection 

The  vfo   is  designed  a- 


round  Motorola's  MC6805T2 
microprocessor.  Within  this 
multi-function  chip  (now 
called  a  microcomputing 
unit  — MCU  — because  of 
all  the  integrated  functions 
on  board),  I/O  plays  a  very 
important  part.  This  is  the 
portion  of  the  MCU  which 
does  the  actual  com  muni* 
eating  with  switches,  LEDs, 
bells,  and  whistles.  The 
MC6805T2  MCU  used  in 
this  project  (we  will  refer  to 


it  as  the  ''JD  has  a  small 
amount  of  RAM,  ROM  (2.5 
K  bytes),  a  timer,  parallel 
I/O  lines,  and  one  other  fea- 
ture that  makes  it  idea!  in 
the  radio  environment— a 
built-in  frequency  synthe- 
sizer A  block  diagram  of 
the  synthesizer  is  shown  in 
Fig.l(a);  Fig.l(b)  is  a  block 
diagram  of  the  entire  vfo. 

The  vco  signal  which  is 
fed  back  into  the  T2  may 
have  an  amplitude  as  low 
as  one-half  volt  and  be  as 
fast  as  16  MHz.  With  exter- 
nal pre  sea  I  ing,  the  vco  fre- 
quency may  be  consider- 
ably higher.  However,  any 
external  prescaling  will 
multiply  the  step  size  by 
the  prescaling  factor- 
In  addition  to  its  on-chip 
synthesizer,  the  T2  contains 
enough  ROM  to  hold  all  the 
software  needed  for  the  vfo 
control  program.  In  fact, 
the  T2  with  the  vfo  program 
in  ROM  is  available  from 
any  Motorola  distributor. 

An  alternative  to  the  T2  is 
the  MC68705P3  MPU.  The 
P3  is  very  similar  to  the  T2 
except  that  it  requires  an 
external  synthesizer  and  it 
contains  on-board  EPROM 
instead  of  ROM.  The 
EPROM  on  the  P3  is  user- 
programmable,  so  you 
should  use  the  P3  if  you 
need  a  control  program 
other  than   the  one  avail- 


12     73 Magazine  •  June,  1982 


able  in  ROM  on  the  T2.  See 
the  box  for  further  informa- 
tion on  programming  and 
use  of  the  P3. 

The  circuit-board  layouts 
given  in  this  article  can  be 
jumpered  for  use  with  ei- 
ther  MPU.  The  figures  and 
text  explain  where  differ- 
ences occur  For  those  who 
prefer  not  to  etch  their  own 
boardSp  a  source  for  boards 
as  well  as  components  is 
given  in  the  small  box. 

Using  the  Vfo 

Upon  power-up,  the 
MCU  reads  the  last-entered 
frequency  from  the  RAM 
on  board  a  battery-backed- 
up  MC146818  clock  chip. 
enters  it  into  the  synthesiz- 
er, and  displays  it.  If  power- 
ing up  from  a  "dead''  sys- 
tem (no  battery  backup), 
garbage  will  be  both  dis- 
played and  entered  into  the 
PLL  system 

After  the  powerup  se- 
quence is  completed,  num- 
bers for  a  different  frequen- 
cy may  be  entered  via  the 
keyboard  When  the  dis- 
play shows  the  frequency 
desired,  depress  ''enter" 
and  the  PLL  system  wit!  be 
set  up.  By  entering  the  fre- 
quency in  this  manner,  it  is 
also  stored  in  RAM  so  that 
if  a  power  failure  should  oc- 
cur, the  correct  frequency 
will  be  read  from  the  bat- 
tery-backed-up  system  and 
the  PLL  restored- 

If  the  displayed  frequen- 
cy is  to  be  stored  into  mem- 
ory for  later  recall,  press 
"memory"  followed  by  a 
digit,  0-9.  To  retrieve  a  pre- 
viously stored  frequency, 
press  "recall"  followed  by 
the  desired  digit  All  of 
these  memories  have  bat- 
tery  backup. 

If  you  want  to  move  up  in 
frequency,  press  and  hold 
the  ''up"  button.  If  you 
want  to  go  up  fast,  press 
and  hold  the  "fast"  button 
at  the  same  time.  The  fre- 
quency will  go  up  until  it 
reaches  XX,999.9,  at  which 
time  it  will  roll  over  to 
XX  000.0.  To  make  the  sys- 
tem go  down  in  frequency, 
the  same  procedure  may  be 


SYSTEW  CLOCK 


r 


1 
I 


OSCltL*TOi* 

a 

DIVIDE,  ar  4 


I&-HT  fltFr- 


PHASE/ 
FREOU  Elicit 
COHPAAATOn 


LOW  f»A$S  FILTER 
"^ Jl- 


FREauENCV 
OUT 


^rt^ 


i* • 


"^ 


VOLTACC 

cmTROLLte 

OSClLLtTOR: 


PART  or  MceaosTE 


tJlVlUt-BY-N 


^[ 


:irzi::_J 


I 


OPttQHAL        L 
I 


Fig.  l(al  Block  diagram  of  synthesizer  on  MC6805T2  MCU  chip. 


followed  using  the  "down" 
key. 

To  set  the  time,  press 
''recall"  followed  by 
^'memory/'  At  this  time,  the 
display  wilt  show  EEEEEE, 
signifying  that  the  time  may 
now  be  entered.  Enter  the 
time  in  2'4-hour  format  and 
when  satisfied  with  the  dis- 
play, press  "enter."  At  this 
time,  the  data  will  be 
placed  into  the  clock  chip's 
registers  and  time-keeping 
will  commence.  When  ''en- 
ter" is  depressed,  the  fre- 
quency that  was  on  the  dis- 
play before  setting  the 
clock  will  be  restored  to  the 
display.  The  actual  PLL  sys- 
tems are  not  disturbed  by 
entering  into  either  this 
mode  or  the  time-display 
mode. 

To  display  the  time  with 
an  update  every  second, 
press  "recall"  followed  by 
"enter/'  You  may  exit  this 
mode  by  pressing  any  key, 
which  will  return  the  dis- 
play to  the  previous  fre- 
quency. 

As  you  can  see,  the  com- 
bination of  the  MC6805T2 
MCU  and  the  MCI 4681 8 
clock  chip  provides  the  ra- 
dio designer  with  capabili- 
ties that  far  surpass  the  pre- 
viously acceptable  meth- 
ods of  frequency  control. 
The  6818  may  be  omitted, 
but  the  clock  feature, 
stored  frequencies,  and  the 
battery  backup  of  them  will 
also  be  deleted. 

Vfo  Circujf  Design 

The  rf  circuitry  I  used  is 


CVXO  FEED8ACK] 


VCO  FEEDfliiCK 


KEveaARC) 


DISPLATf 


LOOP 
rJLTER 


H 


vco 


UtKEn 


■euHt 

VKO 


S|^F#fR 


-p.       FILTER 


VFO   OWTPUt 


Fig.  1(bl  Block  diagram  of  entire  mfcroprocessor-controlled 
vfo. 


given  in  Fig.  2,  while  the 
MCU  and  its  peripherals  are 
shown  in  Fig.  3, 

As  the  MCU's  minimum 
step  is  1  kHz,  some  method 
of  refinement  must  be  in- 
corporated because  1  kHz 
is  not  adequate  resolution 
in  the  HE  bands.  By  using 
four  of  the  I/O  lines  from 
the  MCU  for  a  voltage-sum- 


ming network,  100-Hz  step- 
ping increments  may  be  re- 
alized. The  output  of  the 
sunnming  network  is  used  as 
an  ''offset''  voltage  to  shift 
the  frequency  of  the  vfo. 
Because  the  frequency  will 
be  locked  (basically  to  it- 
self), changing  the  main  vco 
frequency  would  achieve 
nothing.  There  are,  how- 
ever,   two    methods    of 


PARTS  AVAILABILITY 

The  varactor  diodes  {02  and  D3)  and  most  of  the  integrated 
circuits  used  m  this  project  are  Motorola  devices  and  are 
available  from  Motorola  distributors.  In  many  parts  of  the 
country »  Hamrlton-Avnet  Electronics  is  a  source  for  these 
parts.  Excludrng  the  LCD  unit,  a  set  of  ICs  for  this  project 
should  cost  between  $45  and  S70,  depending  on  which  micro- 
processor you  select  for  your  version. 

The  f^Dl08  double-balanced  mixer  is  available  for  $12  post- 
pafd  from  ANZAC,  180  Cambridge  St.,  Burlington  MA  01803.  A 
good  selection  of  coils  and  forms  can  be  found  at  RADIOKIT, 
Box  411 S,  Greenville  NH  03048. 

Parts,  as  well  as  circuit  boards,  are  also  available  from  Con- 
version Dynamics,  2218  Old  Middlefieid  Way,  Suite  N,  Moun- 
tain View  CA  94043.  Their  version  uses  a  double-sided  PC 
board  and  an  LED  rather  than  LCD  frequency  display.  Write  to 
them  tor  more  details. 


73Magazine  •  June,  1982     13 


LOOP  FiLTi^ 
ZTrt 

.4T*F 


¥C€f 


fHH 

TO        **•< 

iCi,> — ''^"^ 

Pm7 


C9 


01 


+12  V 


*I?V 


I 


H3 
I  OK 


■^^ 


//? 


H53 


1^914 


^ 


T 


HI 


3oa 


LU35» 


Kft  l«V»D4 


Hit 

— 'WS^- 


:ir  C50 


a 


it 

.1 


I 


T 


*5V 


1^' 


I'   I 


Cl 


R6 
9IO 


CI 


A>- 


PS' 


T 


27 


fsao 


V 


na 

*7 


1— 
I' 


►I2V 

J 


^,  SELECT  pqtPER 

-J|— *e  AflRAhfGEMEMT  fQff 

C41  APPfiOPft(*TE  5TNt  HE  SIZES 

.%  Chip 


;A 


|;r9  icta 


zro 


CO 

,1 

-5h 


TO  fm 
ICT.   PIN  I  f 


1000 


42  1«'l3.3GI«Ht 


TO 
VOLTAGE 

liETWOi^A 


/ff 


RiO 

5CK 


I 


nil 

lOOK 


T4 


CI6 

.1 


to 

flIT.  ETC*- 
IFIO.  II) 


Ri6 

tOOK 
-*Wrt — 


t^^O 


-±rcil 


m 


C2& 
ISO 


i= 


-)h 


R1^ 


RIB    H- 


X 


*3V 


2g 


C27 

',1 


'01        /^ 

n>oo< 


L& 
I  B 

3h-? 


i1£0 
56 

/ft 


470 


ff^ 


/* 


C31 
L6 


^czt      ^c^      ^^^^ 


(000 
FiLTER 


4ro 


ih 


VFO 
OUT 

a- 6 


changing  the  frequency 
which  would  not  affect  the 
PLL  system  itself  Shift  the 
reference  frequency,  or  use 
an  auxiliary  variable  crystal 
oscillator  [vxo)  and  then 
mix  the  two  frequencies  to- 
gether. 

The  first  method  was 
tried  initially,  but  due  to  the 
low  frequency  of  the  crys- 
tal, I  could  not  pull  the  os- 
ctilator  far  enough  off  fre- 
quency to  provide  the 
100-Hz  shift  and  still  have 
provisions  for  RIT.  So  the 
second  method,  of  an  auxil- 
iary vxov  was  tried.  The 
main  vco  tunes  from  1236 
to  13.36  MHz  and  is  then 
mixed  with  18  36  MHz  from 
the  vxo  to  provide  the  nec- 
essary 5-to-6-MHz  signal 
This  method  of  shifting 
through  100-Hz  steps  may 
seem  a  bit  crude,  but  sever- 

14     73Magazine  •  June,  1982 


Fig.  2.  Rf  circuitry  of  vfo. 


al  commercial  transceivers 

use  this  method.  In  fact. 
I  corn's  IC-730  uses  this 
method  to  generate  10-Hz 
steps!  Fig.  4,  a  spectrum  an- 
alyzer photo,  shows  the  ac- 
tual vfo  output. 

The  18  360-MHz  vxo 
crystal  (Y4)  was  chosen  be- 
cause t  had  one;  it  is  a 
146.8B-MHz  transmit  crys- 
tal for  an  HT-144  Either  of 
two  crystals  may  be  used  in 
the  oscillator.  An  18360- 
MHz  or  an  18.860-MHz 
crystal  may  be  selected  by 
a  jumper  and  a  pultup/pull- 
down  resistor  on  pin  27  of 
I  CI  (see  Fig  3).  The  vco 
must  be  adjusted  for  the 
crystal  you  choose. 

If  a  different  frequency 
range  is  to  be  covered  by 
the  vfo,  the  frequency  of 
the  vxo  crystal  must  be 
changed,    and   appropriate 


modifications  in  the  filters 
should  be  made  From  this, 
it  may  be  seen  that  almost 
any  frequency  may  be  gen- 
erated from  the  vfo  by  sim- 
ply changing  the  vxo  crys- 
tal. 

The  MCU  and  Clock  Circuit 

A  version  of  the  MC6805T2 

is  available  from  Motorola 
which  already  contains  in 
ROM  the  program  neces- 
sary to  function  as  a  vfo, 
This  part  is  called  an 
MC6805T2L2.  The  L2  signi- 
fies a  specific  program 
within  a  ceramic  part  in 
this  case,  the  vfo  software 
The  MCU  is  used  to  gather 
data  from  the  keyboard  and 
execute  any  function  which 
is  "called  up."  The  tines 
used  for  I/O  are  represented 
by  PA0-PA7.  PB0'PB7,  and 
PCO-PCl.  Port  A  is  used  for 


both  the  keyboard  and  rrv 
lerf ace  to  the  MCI  4681 8 
clock  chip.  In  this  applica- 
tion, the  clock  chip  is  bat- 
tery-backed-up,  and  when 
powered  down  draws  only 
300-400  microamperes 
from  a  four'and-one-half- 
voft  source. 

The  B  port  is  used  to  con- 
trol the  four  bits  of  the  voit- 
age-summing  network  plus 
the  read/write  and  control 
lines  of  the  clock.  The  C 
port  is  used  to  control  the 
clock  and  data  lines  of  the 
liquid  crystal  display  (LCD). 
Only  two  crystals  are  re- 
quired in  this  part  of  the 
vfo  — a  4  096  MHz  for  the 
MCU,  and  a  4.194  MHz  for 
the  clock  chip.  These  fre- 
quencies are  divided  down 
by  their  respective  hosts  for 
internal  timing. 

All  of  the  peripherals 
with  the  exception  of  the 
6818  are  serial  devices.  This 
means  that  the  digital  data 
which  goes  to  each  part  re- 
quires only  two  lines,  a  data 
line  and  a  clock  line  In  the 
MCU  environment,  I/O 
lines  are  at  a  premium;  that 
is  why  data  lines  are  com* 
mon  to  all  parts  and  only 
the  clock  or  enable  lines  are 
separated  from  the  rest. 

The  Display 

The  display  portion  of 
the  system  uses  the 
MCI 45000  multiplexed 
LCD  driver  and  an  8-digit 
LCD,  although  only  six 
digits  are  used. 

The  MCI  45000  requires  a 
total  of  four  lines  — power, 
ground,  clock,  and  data. 
This  means  that  the  display 
may  be  located  away  from 
the  main  PC  board.  This 
makes  for  a  lot  easier  con- 
struction of  the  total  proj- 
ect! Since  this  is  digital  data 
on  two  of  the  lines,  use  no 
more  than  about  a  foot  of 
cable.  Current  consump- 
tion is  quite  low  with  this 
CMOS  device— about  75 
microamperes.  As  data  is 
shifted  into  the  145000, 
every  8  bits  will  shift  over 
one  character  from  left  to 
right.  Even  if  only  the  right- 
hand-most   digit    is    to   be 


The  antenna  specialists  co.  introduces  the  DURA-FLEX 
shock  nriount.  It  does  everything  a  steel  spring  will  do — whDe 
solving  two  special  problenns. 

1 .  It  completely  eflminates  spring-generated  RF  noise 
in  duplex  radio  systema 

2.  It  improves  radiation  patterns  and  prevents  antenna 
damage  in  rough  environments  by  drastically  dampening  whip 
vibration. 

DURA-FLEXJ"  You  have  to  flex  it  to  believe  it 


t:he  antenna  specie 


ign  solution& 


the  antenna  speciatists  co. 

a  member  of  The  Allen  Group  Inc 

12435  Euclid  Ave..  Cleveland.  OH  44106 

Canada:  A.  C.  Simmonds  &  Sons,  Ltd. 


^63 


y^S^e  List  of  Advertisers  on  page  J 14 


73 Magazine  •  June,  1982     15 


J 


♦sv 


i*CO 


■  i 


PCi  — 


10 


PCS 


ri 


1 I"  T^    1' 


ENAULC 


ftflF  SMt     fUC    HAi      vcc 


ri 


'4!* 


OSCOUT 


Ci*JD     na? 


£54      - 
10- *0' 


T5 

e  046MHJ 


Fft 


^W 


OF  FIG  i 


r 


■^TO  VCO 


CHOUT 


-K- 


^ 


■^FROU  VCO 


C40 


/f9  /ft 


P 


hru 


MC6fl7aWl 


12  *Cf  'to 


204i  *  I  KMI  SfEP 


/ 

^y^ 

CM&BLE 


5155 


OCIK 

DATfi 


ir  THE  TJ  MCU  IS  USED,  MAKE 
THESE  JUMPER  COMNEttfONS 
AT   THE   MCL4!ll55   SOCKET 


COUNT! K 


iD 


• 


4ig5MHt 
TO    P3.4- 
PIN  4 


21 


Mc^4Geie 


CKOUT 


BAHO   SWITCH 

on 

e*IA9LE   oil 
Mm    COUNtER 


F/^.  >*.  Using  the  MC745155  CMOS  synthesizer 


Using  the  P3 

Although  designed  tor  me  MC6805T2.  the  vfo  software  was 
given  the  capability  of  using  the  MC68705P3  as  a  host  MCU. 
This  MCU  is  identical  to  the  T2  with  the  following  exceptions: 
•  The  P3  does  not  contain  a  PLL  •  The  P3  is  an  EPROM  type 
part  which  programs  itself. 

In  the  early  stages  of  the  design,  a  T2  was  not  available  and 
a  '*simulation"  was  made  by  usmg  a  P3  and  an  MC145155 
CMOS  synihesizer.  If  changes  to  the  program  are  desired,  yoti 
may  use  a  P3  plus  an  MC145155  CMOS  synthesizer  to  sirrru- 
late  the  T2,  as  shown  in  Figs.  A  and  B.  This  allows  you  to  use 
the  same  basic  core  of  the  program  and  add  enhancements 
that  might  be  useful. 

The  actuat  software  listing  for  the  system  is  available  from 
me  on  receipt  of  a  targe  SASE  plus  $3.00  to  cover  copying 


Fig.  &.  6805  T2  vs.  P3  diff&rences^ 


costs.  It  may  be  entered  into  an  MCM2716  2K  by  8  EPROM  for 
programming  ot  the  MC68705P3,  Fig.  C  Is  a  schematic  for  the 
programmer. 

The  MC68705P3  MCU  has  the  capability  of  programming  it* 
self.  By  adding  only  one  additional  part  (MC14040B),  the  P3 
can  read  data  from  a  2K  by  8  EPROM  and  program  itself  from 
it.  Two  LEDs  are  used,  which  signify  that  the  device  has  been 
1 -programmed,  and  2-vefified. 

Because  the  hardware  required  to  program  the  P3  ts  so 
small,  even  the  casual  amateur/hobbyist  may  build  a  pro- 
grammer to  take  advantage  of  the  MCU's  capabitittes. 

Either  the  T2  or  the  P3  with  the  MCI 451 55  can  be  used  with 
the  circuit  board  presented  in  this  article.  If  the  T2  is  used^  the 
MG145155  is  not  needed  and  two  jumper  connections  should 
be  made  at  the  MC1 45155  socket-  See  Fig.  A. 


SI 


Vcc> 


»00 


4rn 


*ii^ 


■<i3¥&t 


.0  1 


^ 


lOQpf 


^1 r ' 

^lOMUr 


CXlAL 


-31- 


AT  CUT 


zmizi 


© 


! 


tN^OOi 


:\*i% 


00» 


ZH2222 


o 


*l«1-p 


^i'lN^MBA'T**^*'        '^m*T* 


2ft 


4Q0I 


m 


Vcc> 


It 


_*2 
II 


Sir 


MT*L 


WtSCT 


PAD 


,11 


Wpp 


PCi 


»e4 


pet     *«J 


^  f  w 


PflQCftAMMED 


47  Q 
— ^Ar 


^ 


ti 


|<'I4 
VEflrFlEO 


470 


^ 


19 


tf 


m 


mm 

AtllT 


;L0^f 


Vcc 

y 


« 


z% 


■4 


7* 


14 


iA. 


Zf 


J£ 


^a 


rr 


\*i%  ;j4?it 


^ 


*' 


or 
» 

04 

MCM^7I6 


»( 


t^ 


•s 


C  3 


T 


rS 


J!2 


S_ 


21       11 


I) 


Ji 


i'^  i"  i" 


Of 
Oi 

Q-l 


CLK      BST 


etc  Aft 


JItT 


'lO 


X 


Oi 


ill 


Ji£{4D40fl 
CCOHTEfl 


Vss  •  0  VOLT 


fig.  C  Programmer  for  the  P3. 


10     73M^gB^ine  •  June,  1982 


fleadei-  Service  tor  tacmg  page  *^31^ 


Is  this  new  KDK  FM2030 

the  best  2  meter  FM  radio  in  the  world? 


U  CM         M  Fn 


niAu       \ 


CAJ^L 


esY 


KDK  VHP 


FM  aoaa 


OPN 


W.5  ^  a.n  1  21^ 


a    in 


XMT 


BlG^PW*^ 


VrfR  «^** 


**a      t      f       A^ 


P*£V 


TCMVE  »LO 


A 141 


VOC-tnAflPI  mPf 


1.% 


•  ••best... in  me 


jiAu 


That's  a  pretty  strong  claim  considering  the 
;ompetitfon, 

^et's  look  at  some  of  the  features  . ,  , 

•  KDK  continues  the  tradition  of  bciog  the  ultimate  in  VHF  FM  mobile 
operations.  We  make  maximum  use  of  multiple  function,  multiple  shaft 
;on trots  and  onlv  three  sets  of  knobs  are  located  on  the  front  panet. 
>till  many  new  features  have  been  added,  such  as  digital  RIT.  reverse 
lutton,  memory  channel  readout  number  and  morel 

•The  new  KDK  4  bit  microprocessor  chip  is  an  in-house  developed 
ioftware  which  makes  all  these  new  features  possible.  Plug  in  modules 
ire  used  for  CTCSS  tone  and  diode  matrix  duplexing. 

•We  gave  it  a  very  heavy  textured  paint  finish  on  the  case  and  mounting 
iracket  that  is  highly  resistant  to  scratch  in  gt  No  more  micro-thin  paint 
'inishesl 

•  Modem  styled  front  panel  with  dials  intelligently  arranged  so  you  can 
Dest  utilize  the  multi-function,  easy  to  handle  controls. 

•  Good  audio  with  the  famous  KDK  audio  output  capability  of  1.5 

mm  . . .  you  can't  blow  out  our  audio  \Ci 

•  RF  power  is  a  good,  clean  no  spurious  signal  of  25  watts  on  high  and 
S  watts  (adjustable)  on  low, 

•  Frequency  coverage  143.005  -  148.995  mhz,  S/N  better  than  35  db 
it  1  uv  input.  Better  than  .2  uv  at  12  db  SI  NAD.  Squelch  sensitivity 
letter  than  .15  uv.  Bandwidth  at  -6db:  +6khz,  at  --BOdb:  +16kh2. 
Image  ratio  better  than  70db.  Double  superhetrodyne.  Transmitter  uses 
/ariable  reactance  frequency  modulation  with  maximum  deviation  set 
3t  ±5khz. 

•Nicads  for  memory  retention  built  in,  nothing  extra  to  buy.  Disconnect 
the  FM2030  from  the  power  source  and  the  memories  remain  I 


^y  y 


INTRODUCTORY  PRICE! 

Includes  Tone  Pad  Microphone 

and  all  accessories.  Shipping:   $5.00  eastern  U.S.A.  S7.50  western  U.S.A. 


$309 


•  Easy  to  use  mobile  mount  with  instant  disconnect  knobs  for  fast, 
simple  removal.  DC  Cable  and  mounting  hardware^  spare  fuse,  external 
speaker  plug  and  complete  simplified  instruction  book  includes  circuit 
diagrams  and  even  complete  alignment  instructions!  No  extras  to  purchase! 

•  Control  functions:  Select  memories,  show  memory  channel  number, 
or  select  memories  and  show  frequency  of  channel,  or  dial  frequencies 
with  two  speed  selectable  control.  Instant  choice  of  either  5  or  100  hz 
tuning  steps.  Band  scan  or  frequency  scan  selectable. 

•  Frequency  shown  in  5  bright  LED  digits.  tED  indicator  shows  when 
signal  is  received  (unsquelched),  LED  indicator  shows  transmit. 

•  Modern  LED  bar  meter  shows  signal  strength  of  received  signal  and 
on  transmit  shows  relative  output  power. 

•  Microphone  includes  tone  pad,  and  up  and  down  buttons  to  change 
dial  frequency  or  memory  channels. 

•A  standard  microphone  with  up-down  buttons  only  Es  available 
separately. 

•  The  FM  2030  is  basically  as  easy  to  use  as  a  crystal  receiver  with 
rotary  switch  frequency  selection  for  full  "eyes-on-the-road"  mobile 
operation. 

•  And,  in  case  we  forgot  to  mention  it,  we  retained  our  good  point-to- 
point  wiring  and  printed  circuit  boards  and  eliminated  troublesome 
relays  and  those  pesky  internal  plugs  that  can  give  trouble. 

•  Smaller  case  size:   55mm  (2  3/1B")  high,  162mm  (6  3/8")  wide, 


182mm  (  7  3/1 B")  deep. 
NOW  YOU  HAVE  JUST  SOME  OF  THE  FEATURES , .  •  IT'S  UP  TO  YOU  TO  DECIDEl 


Write  for  brochure  -  Deafer  Inquiries  iffvftiill 

Warranty  inforTnation  available  from  your  dealer  or  direct* 

Company  reserves  the  right  to  chaoge  spectf  scat  ions 

without  notice. 

Exdifsive  USA,  Central  and  South  American  Distributor 


NOW  DIRECT 
CALL  TOLL  FREE 


ORDER  DIRECT  or  at  your  deater! 

DISTRIBUTED  BY: 


800-251-4141 


Tbi  miirdHf  l^r  anOERS  ONI Vt 


Miil  Qatar  -  COD  -  ivtb  Cii4i 


KDK  DISTRIBUTING  COJNC. 

617  SOUTH  GALLATIN  nOAO  -  MADISON,  TN  37115  -  PHONE  (615)  86S-7949  -  TELEX  80-8327 


i 


MS 


'•"""  ,1 — HIT 


1  I-' 


f 


C34 


.1 


4  D36WHI 


FROM  VCO> 


II 


TO  LOOP^ 
FILTEFT  IR4> 


TO  VXO 


RS2l~Z4 

— A(VSp — 


li 


40  K 
^'W- 


if 


20K 


Jl 


— ^^» 


^4 


NETWORK 


I 


tf 


*5¥ 


I 


*lif^       vet 


EKTAL 


■TAL 

□  COMP 

PBb 


F-A7 


i*ei 

P9i 


iCi 

4M:Sfl05T2   pB3j 

#^  Pti   1*^0 


Ifrtt  CtHJKT^t  FIG  flt 
EtMSLX  Oft 
G  SWITCH  €■ 


ID 


mta€- 

OiHl   COUNtER]i 


r 


20 


Ml 


■i 


Zl 


3f 


i'3 


#» 


23 


ttyT 


4_H.„. . 


24 


ti 


?i 


1^^ 


c? 


zt, 


f*ST 


*»££ 


C3 


Ef 


nzB 

\5K 


-MWy 


*5V     / 


C4 


IC2 


1 1 


i 


»t 


li 


«? 


h« 


IS 


\ 


i3b 


— ^flKV — 


*av 


ft26 
^^w- 


1127 


m 


•5V 

L 


14 


21 


KEvaOARD  IS 
STAI^DARO  Z  Of  8 
COUBINATLOftf 


zmtt 


t% 


42 


CRi'StAL  JUUPER 

^Sv'ie.seiiHi 


4|>| 

Ai;>'Ei 

A&T 


iMT 
AS 


QlFS 

MS 
PS 


6HU 


asCi 


osc- 


mJ 


*3V 


2* 


♦-H  f 


ZI 


n^9 

lOOK 


IZ 


I 


C39 

SOpF 


^ 4    MH 


$4 

* 


C3€ 
ID'40 


UDDE   OPTIONS 
ISEE  TAfiU;  I ) 


14 


ti.K 


BAT^ 


V4C 


iCS 


FPI 
FPS 

FP3 

FP4 
FP5 

FPi 


FPQt 

Fipe? 
8P* 

ftp  3 

epi 


40  ■** 


J  1. 19 


*A*'i 


14  J  ^ 


*i.*l 


iQ 


Q.  [' 


^M 


i.f 


m 


4*  4i 


ir 


t3 


M  ?i^ 


i# 


24. » 


li 


33   12 


1? 


.M 


■  4 

A4 
BS 
a4 
B« 
AC 
•  » 

ff4 

aiP« 


IC4 


ft*»l 


fipi 
B'Pi 


GE 

LX1»%OT#I» 

OiSPUIT 


SQUARE  WAVE  TO 
LEVEL  COMVEHTEfl 


RESET  ON 
OPTIQIVAL 

UHi  coimTm 


MCI  4  500  &P 


REIIOTE 
ifCU 


FftOW 


!■ 


C.C'*BOUT   i€2flnA 


changed,  all  6  digits  must 
be  present  to  the  1 45000  (48 
bits  worth).  Fig.  5  is  a  chart 
which  relates  bits  to  digit 
segrnents. 


Fig.  3.  MCU  and  peripherals. 

The  Real-Time  Clock 

The  MO 4681 8  is  a  new 
device  which  not  only  has  a 
real-time   clock    in    it,    but 


Fig.  4.  Vfo  output  displayed  on  spectrum  analyzer. 
te     TSMagazinG  •  Junej982 


also  contains  50  bytes  of 
CMOS  RAM.  This  makes 
the  device  an  excellent 
choice,  since  data  in  the 
RAM  may  easily  be  saved  in 
a  power-down  condition. 

The  6818  has  a  clock  gen- 
eration circuit  on  chip 
which  requires  only  a  crys- 
tal, resistor,  and  two  small 
capacitors  to  generate  not 
only  the  time  clock  source, 
but  also  a  clock  signal  for 
the  rest  of  the  system  if  de- 
sired. If  the  crystal  mode  is 
not  chosen,  the  6818  may 
be  driven  with  an  external 
frequency  of  4*195  MHz, 
r048  MHz,  or  32.768  kHz 
An  interna]  register  tells  the 
6818  which  frequency  it  is 
on.  I  have  found  that  the 
6818  draws  less  power 
when  operating  at  the  low- 
est frequency— 32.768  kHz. 


R 


Displayed 


0 
1 
2 
3 

4 

5 
6 

7 

9 
A 

b 

C 

d 

E 

F 

P 

Y 

H 

U 

L 

blank 

—  (dash) 

^  (equal) 

n 

r 
"(degrees) 


DIspliiy  Format 
Hex  Code 
D7 
06 
E3 
A7 
36 
B5 
F5 
07 
F7 
B7 
77 
F4 
D1 
E6 
F1 
71 
73 
B6 
76 
06 
IDO 
00 
20 
AO 
64 
60 
33 


Note:  A  decimal  point  can  be 
added  to  all  but  the  right^most 
display  digit  by  setting  b3  [seg- 
ment (3)]  to  a  1, 

Fig.  5.  Display  codes  of  LCD 
readout 


In  fact,  by  using  an 
MCI  4069  inverter  as  a  crys- 
tal oscillator  at  32.768  kHz, 
less  power  is  used  than  by 

using  a  4.194-MHz  crystal 
on  the  6818!  As  with  most 
parts  of  this  type,  the  faster 
the  clock,  the  more  current 
required. 

The  MCI 4681 8  may  be 
set  up  in  a  12/24'hour  type 
mode,  plus  alarms  which 
may  be  set  to  interrupt  at 
any  time,  including  every 
hour,  minute,  or  second.  As 
shown  in  Fig,  6,  there  are  14 
registers  required  to  set  up 
this  data,  and  the  entire 
memory  map  looks  like  64 
RAM  locations. 

Although  the  MCI  4681 8 


0 


Electronics  Supply 


c 


IT-ONi\ 


LIST   $2995,00 

three    selectivrty    posftfons 
for  CW  (two  for  FSK!)  usmg 
optional  filters. 
73  MHz  first  fF 
0.3  uV  sensitivity 
full  break  m 

Curtis  8044  keyer  available 
as  option 

front  panel  keyboard 
ten  VFO'i 
•  one  year  factory  warranty 


> 


««*J»J  DRAKE 


ANNOUNCING  THE  NEW 


^KENV\/OCX}    TS930S  Call  for  Quote 


160-10  Meters,  with  150kHz 
*  30  MHz  General  Coverage 
Receiver,  quadruple 
conversion,  digital  PLL 
synthesized  circuit 
All  Solid  Slate. 
Power  input  rated  at  250W 
PEP  on  SSB,  250W  DC  on 
CW,  140W  DC  on  FSK,  and 
eOW  DC  on  AM 


Autonnatic  Antenna  Tuner^ 

Buth-ln. 

CW  Full  Break-In, 

Dual  Digital  VFO's 

Eight  Memory  Channels. 

Dual  Mode  Norse  Blanker 

r'Pulse"     or 

"Wood  pe  ck  er* ')  * 

S5B  IF  Slope  Tuning. 

One  Year  Warranty. 


lus  Coverage 
Reception—      no  gaps— no 
range  crystals  required 
Amateur  Band  transmission^ 
including       capability       for 
JVI  A  RS,  Embassy, 

Government,      and      future 
band  expansions 

1  695.00 


Mmsim 


IC-720A 


Madison's 
LIST  Price 

$1498  w/AC     $1298  w/AC 

ICOM'S  top  of  the  line  - 
9  band  HF  transceiver, 
general  coverage 
receiver  -  0.1  MHz  to  30 
MHz,  12  VDC  operation 
(compatible  with  PS15 
power  supply).  2  VFO's 
built  in* 


DONS  CORNER 

My  spy  at  ihe  Japanese  factories.  Tang  In  Stead,  h  back  on  my  good 
side.  If  you  have  fo Hewed  his  doings <  you  will  recall  thai  he  leaked  the 
info  on  the  new  Kenwood  TS-840s  three  months  ago.  Well  take  ihoie 
three  monihi^  which  is  90  days,  add  that  to  the  number  fi40,  and 
presto>  the  Kenwood  TS930s.  He  was  RIGHT!  Just  premature.  .  ,but 
isn't  that  what  spies  are  for?  Tang  has  started  rumblings  about  the  new 
Icom  HF  rig  that  is  about  to  debute  More  on  that  next  month. 

Antennas,  those  things  that  you  stick  up  on  the  roof  or  tower  and 
then  forget  about,  are  evolving  into  new  shapes.  If  you  haven't 
checked  yours  recently,  get  up  there  and  inspect  the  connectors, 
traps,  guys,  and  joints.  That  next  OX  pile-up  is  the  wrong  time  tc 
discover  the  creeping  crud.  What  with  I  he  new  verticals  and  compaa 
beams,  there  is  no  reason  to  use  wire  as  your  primary  radiator.  Call  us 
and  ask  what  the  best  alternative  is  for  your  set-up. 

\f  you  and  the  cJan  are  going  on  a  vacailoRp  don't  negfect  the 
equipment  you  are  taking  alortg.  Consider  an  amplifier,  extra 
batteries,  appropriate  mobile  antennas,  power  cords,  scanning  or 
DTMF  mikes,  mobile  chargers,  and  so  on.  Thtnk  about  how  the  rigs 
wfll  be  used  and  be  prepared.  ^  _  . 

See  you  next  monthl 


fcOLLINS  KWM  380 

I            LIST  $3849.00 

I  Madison's 

V    Price  $2795.00 


BELDGN  Ks> 


ftGl.'u 
Obi  Shivlil 


nGi,'u 


^  9883 

esc/ft. 

Ho.  of  Cond  -  8 

AWG  (in  mm)  — 

8214      6  22  (7  N  30) 

P  3*  c/h,  2-18  {16x30)  f1   19) 


^-   t^    ft44S 


\- 


RGi;u 


8237 
32«/fl.  No.  of  Cond  —  8 

AWG  {in  mm} 


— »    ,     9405 
-'-^  '  *6  C/#t. 


fVi213 

Mon-cpnlArmnalinfj  2-18  (20  X  30) 

8267      S*1 6  (1  C  X  30i.  (1    1 7) 
*3  0/ft. 

Belden  Mini  RG-S  (9256)-19c/ft. 


ANTENNAS 


BUTTERNUT 
New  HF6V 
100.00 


HYCAIN 
18AVT/WB 
100.00 


HUSTLER 
5BTV 

100.00 


TH7DXX 
HYCAIN 

349.00 


cushcroft 

A3-1 69.00 
A4-209.00 


( 


C 


713-658-0268 


•  CALL  FOR  QUOTES 


1508  McKINNEY  -« 

HOUSTON.  TFXAS  7701Q 


^S&e  List  of  Adv€ttfS&fS  on  page  114 


73MBgaz'me  •  June,  1982     19 


Main  circuit  board,  using  the  MC6805T2L2  MPU  If  the  al- 
ternate "py  MPU  is  used,  then  the  socket  with  jumpers  at 
lower  center  would  be  replaced  with  an  MC145155P  syn- 
thesizer chip.  The  empty  socket  at  left  is  for  the  plug-in  ca- 
ble to  the  keypad  At  upper  right  is  a  metal  can  containing 
the  double-balanced  mixer. 


clock  chip  is  not  designed 
to  have  any  I/O  pins,  there 
is  one  way  in  which  a  single 
output  bit  may  be  "con- 
structed," The  SQW  pin  is  a 
software-programmable 
clock  output  pin  whose'f re- 
quency  is  a  derivative  of 
the  681 8's  clock.  The  inter- 
nal register  which  controls 
the  frequency  of  the  SQW 
pin  can  not  only  change  the 
frequency  of  the  pin,  but  it 
may  also  turn  it  off.  By  set- 
ting the  frequency  of  the 
SQW  to  some  relatively 
high  frequency  (it  is  not 
really  that  important)  and 
providing  some  external  fil- 
tering, when  the  clock  is  on, 
the  output  of  the  filter 
represents  a  "one"  condi- 
tion, and  when  off,  rep  re* 
sents  a  "zero"  condition! 
This  provides  an  extra  I/O 
pin. 

Power  Supply 

To  supply  the  MCI 4681 8 
with  voltage  both  when  the 
main  system  is  off  and  on, 
there  need  to  be  a  few  smarts 
involved.  See  Fig.  7,  The 
trick  required  is  to  use  D6  to 
initially  raise  the  5  volts 
from  IC7  one  diode  drop 
higher  (.7  VJ,  then  drop  the 
supply  voltage  (Vcc)  to 
both  MCU  and  6818  by  sefh 
arate  diodes  {D4  and  D7}. 
This  ensures  that  both  parts 

20     73Magazine  •  June.  1982 


are  operating  at  basically 
the    same    voltage.    For 

battery-backup  operation, 
D5  is  inserted  from  the  plus 
lead  of  the  battery  to  pin  20 
of  the  6818.  This  isolates 
the  batteries  from  the  rest 
of  the  system  and  doesn't 
allow  any  current  to  flow 
back  into  them  when  the 
main  Vcc  is  on.  If  you  are 
using  nicads,  a  resistor  of 
appropriate  value  could 
replace  the  diode  to  allow 
charging  during  on  time. 
The  value  of  this  resistor  is 
of  little  consequence  to  the 
6818  when  the  main  power 
is  off  because  the  current 
consumption  of  the  6818  is 
so  low. 

In  addition  to  the  voltage 
differential,  there  is  another 
consideration  regarding  the 
chip  enable  (CE)  line  of  the 
6818.  When  the  system  is 
powered  down  (main  pow- 
er), the  CE  line  of  the  6818 
should  be  brought  high  to 
ensure  that  the  part  is  dese- 
lected. This  is  easily  accom- 
plished by  using  a  transistor 
(Q5  in  Fig.  3)  in  the  classical 
inverter  style.  The  base  is 
tied  to  the  MCU  Vcc 
(through  an  appropriate  re- 
sistor), and  the  collector  re- 
sistor is  tied  to  the  6818 
Vcc.  When  the  system  is  on, 
the  collector  is  low,  en- 
abling  the  6818,  but  it  goes 


0 

QQ 

13 

14 
6tT£S 

QD 

14 

SO 
BYTES 

ys£R 

HAM 

oe; 

«3 

sr 

0 

SECO*iDS 

01 

OZ 

03 

Oa 

OS 

06 

07 

OS 

09    , 

Oi. 

OB 

OC 
OD 

1 

SIC  4L4RM 

z 

l*lJ*LiT£S 

1 

' 

3 

Mil  ALAI^M 

4 

«Ou«S 

BmAttt 
»0(fl  fiCO 

5 

MR  ILAHU 

COKTEIITS 

6 

OAt  Of  Wi 

t 

DAtE  OF  1*0 

a 

MONTH 

5 

YEAR 

10 

REGISTER  A, 

i  i 

ffEGlSTEH  a         J 

12 

Reqf$TEft  c 

13 

fl£GlSTf  R  D 

Fig.  6.  Registers  oi  the  MCI 4681 8  clock  chip. 


•itv 


*I2V  TO  M,L 
POINTS 


*flV  TO  VCO, 
f     VXO 


f  Hurrcn 


♦  SV  TO  Itl.  Wi  J 
4     MCU 


""T^ '    MCirB05     ^T T — ^^~T 

I r *     ^  J^ 

pfcc4i         T  :±ic*z     1  ^c48 

/h  I^'^''^  ^  9V  TO  IC3, 

11^ ^ 1      SfliB  CLOCK 

CHtP 


^IPI«I4 


43V 


>1,| 


Tl 


fig.  7.  Power  supply.  The  r^ulated  72  Vdc  which  drives  this 
supply  can  often  be  derived  from  your  transceiver.  Other- 
wise, a  simple  12-V-dc,  1-A  source  should  be  constructed. 


high  when  the  system  gets 
turned  off. 

The  Keyboard 

Because  I/O  lines  are  so 
valuable,  each  one  com- 
monly is  given  more  than 
one  function.  Of  course, 
every  effort  has  been  made 
to  keep  the  number  of  lines 
required  to  a  minimum  (by 
using  serial-type  devices), 
but  there  are  instances 
where  large  numbers  of  I/O 
pins  are  required.  For  in- 
stance, the  4X4  keypad  re- 
quires eight  lines  just  to  de- 
code the  proper  key.  Yes,  a 
two-to-four  decoder  could 
have  been  placed  external 
to  the  MCU  which  would 
free  up  two  additional  tines, 
but  it  also  would  have  re- 
quired an  external  device  to 
perform  that  function.  The 
system  designer  must  make 
the  decision   here.   In  this 


DATA 


RCSE 


*9V 

In 


EMiBLE 


1 


LSD 


11 


0-4 


II 


14 


-  J 


MSD       0-4 


/h 


IC9 

DUAL  aCD  COUNTEft 


ALL  ttlPUTS  ARC  RISllWS 
EDGE  THIGCEBEO 


fig.  S.  MHz-counter  option. 

case,  I  chose  to  "multiplex" 
the  data  lines  for  the  clock 
on  the  same  I/O  tines  as 
those  required  for  the 
keyboard. 

The  way  the  software 
works,  immediately  after  a 
key  ts  released,  eg,  the 
"enter"  key,  the  data  direc- 


DOUBLE  BAZOOKA 
COAXIAL  ANTENNA 

'  Injection  Motded  Plastic  Fittings  for  Strength, 
Durability  and  Weather-proofing, 

*  Broad  Banded  Low  VSWR 

*  No  Tuner  or  Balun  Required 

*  Feed  With  Any  Length  50  Ohm  Coax 

*  Power  Handling  Capacity  -  Two  Kw 

'  Not  A  Kit  -  Ready  For  Use  -  Made  in  USA 
'  Steel  Eyeletts  For  Installation  and  SO-239 
Fitting  Are  Molded  Into  Antenna 

20, 15,  Of  10  Meter... ..„...,„. „44 .95  ea 

[loWGP  gain  sysi  ems 


D  Payment e^c Insects _ 
D  VISA         QMC 

Card    nq-, Bnp. 

Signature 

Name 


00X0. 


1007  Cypress  ^95 

Wist  Monroe.  La.  71291 


VHUti 


Addreas^ 

crry 


.State. 


!fp_ 


HAVE  RTTY—WILL  TRAVEL 


TIJLES14 


I*  y 


-^ 


•»«*.* 


Yes,  now  you  can  take  it  with  youl  The  new  HAL 
CWR-6850  Telereader  is  the  smallest  RTTY  and  CW 
terminal  available,  complete  with  CRT  display  screen. 
Stay  active  with  your  RTTY  and  CW  friends  even 
while  traveling.  Some  of  the  outstanding  features  of 
the  CWR-6850  are: 

•  Send  and  receive  ASCII,  Baudot,  and  Morse  code 

•  RTTY  and  Morse  demodulators  are  built-in 

•  RTTY  speeds  of  45.  50,  57,  74, 110,  and  aOO  baud 

•  High  or  Low  RTTY  tones 

•  Send  and  receive  CW  at  3  to  40  wpm 

•  Built-in  5  inch  green  CRT  display 

•  Four  page  video  screen  display 

•  Six  programmable  HERE  IS  messages 

•  Pretype  up  to  15  lines  of  text 

•  External  keyboard  included 

•  Runs  on  +12  VDC  @  1.7  Amperes 

•  Small  size  (12. 75"  x  5"  x  1L5") 

Write  or  call  for  more  details.  See  the  CWR-6850  at 
your  favorite  HAL  dealer. 

HAL  COMMUNICATIONS  CORP. 


BOX  365 

URBANA,  ILLINOIS  61801 


217-367.7373 


.-345 


Hl-Q  BALUN 


•  For  f3i0€Hes  yagis.  ^nveftetJ 

•  Replaces  cemef  iisiiiaiof 

•  Puis  powffif  m  amenna 

•  B'oadDandHl  3-40  mhz 

•  Smau  hgiitMeigril  and 

•  I  1  ifnpeoaince  ratio 

•  For  Ml  legal  pOitfO  and  mete 

•  Heipis  eliniinai*  rvi 

•  Wiin  SO  239  cortnectof 


I 


only  $12.95 


Hl-Q  ANTENNA 

INSULATOR 


Small  rugged  ugni^L'ighf 
weal  he  rpr  oof 

Replaces  cenier  msulatgr 

Kancfles  full  legal  power 
tin  a  more 

wm  SO  239  connycfor 


^'^ 

'Z^*.^ 


$6.95 

Hl-Q  ANTENNA 
ENO  INSULATORS 

Rugged  Ug^ilwe^ghi.  iAjec- 
tion  molded  ot  top  quality 
maierial.  with  hijjh  didiec^ 
trie  qualiUBs  and  excel la^nl 
weather abihty  End  insula- 
tors afB  constructed  in  a 
spiral  unending  fashion  to 
pemiit  wirK^irig  of  foadir^} 
coils  o*  iiarltai  winding  fof 
tuned  traps. 
May  Dc  iriva  ic 

•  Guv  ***t^  ^fa«n  inS4^y|fO*S 

•  t  no  ot  c<?nic?t  uTr^uLafffS  'ck 
anii'nnas 

•  Construction  Qi  iintcfina  toa<J- 
ing  coii^  w  rmjltiband  traps 


M.95 


MODEL         a^NOS  LENGT>1 

Oipolai 

DSO  80J5 

D-40  40,15 

D-20  20 

D'16  15 

D^tO  10 

SDBO  S0.75 

SD-40  40 

PD-BOtO  80,40.20,10, 1& 

PD-4010  40^,10,15 

P0fi040  60.40,15 

PCMOaO  40.20.1S 

S-80 
S-40 


PBiei  WITH 
H1-0  BALliN 


WITH  HI  Q 

CIMTCA 

iNfiULATOfl 


130 
66 
33 
22 
16 


90 
45 


13195 
2a,95 
27.05 
26,95 

35.9B 
32  95 


S27.95 
24.95 
23.95 
22.95 
21,95 

31.95 
23.95 


ao.75 

40 


15       130 

43-95 

J9.y& 

y            66 

37.95 

33.95 

130 

39,95 

3ajas 

m 

33.95 

79m 

M-  rricludHl  w 

St>  rTtiKl*4t 

|T1.95pr 
Sia95  pT 


All  anteitnasafa  complete  vnith  a  Hl-Q  Baiunw  Ht-0 
Antefina  Center  in^^lator.  No.  14  antenna  ««fire,  cef- 
amic  insulators.  100  nylon  antenna  Support  rope  rSD 
models  only  50}  rated  fof  (ull  legal  power.  Anrennas 
may  be  used  as  an  mverted  V  and  may  also  be  wsed 
by  MARS  or  SWLs. 

Anieitna  accessories — avail  abie  with  anfenna  orders 

Nylon  guy  f Ope  45(>#  test  100  feet  $4.49 

Cefamic  (Dogbon^  Type)  antenna  InsuEatom  $1.50  pr 
SO  239  coax  connectors  .SS 

All  prices  are  postpaid  USA  4fl 
Available  at  yaur  favorite  dealer  or  order  direct  from 


^/sflft  Dealer  Inquiries  incited 

Gorden 
Engineering 

BOX  2130S  B.  SOUTH  EUCLID,  OHIO  44121 


'Se^  LfStGf  A(iverttsers  on  page  tT4 


73  Ma^zlns  •  June,  1982    21 


HC4#S» 


T<tS*70 


2 

4 
» 


2 


1 


If 


90 
40 


10 


ie 


IT 


ly 


42 


•2L 


SELAT 


•  MP^O    *tV 


•ev 


TrPic*t 


3.fiK  xa 


O-GO 


v:  #oi( 


loa 


10  D 


*  loe  flfLAv 


•toe    REIW 


HFUP 


ADDRESS 

DATA 

$03 

$80 

$07 

$40 

$10 

$20 

$U 

$10 

$18 

$08 

$21 

$04 

$24 

$02 

$26 

$01 

$29 

$03 

Fig.  9(a).  This  circuit  provides  automatic  bandswitchirig  for 
the  FT-707.  Alternative  connections  rriaybe  required  for  the 
FT'107  or  other  radios.  Be  sure  to  place  the  f  7-707  band- 
switch  in  the  unused  position  when  this  hardware  is  con- 
nected. 


complete,  While  in  the 
time-display  mode,  once 
every  second  an  interrupt  is 
generated.  As  soon  as  the 
MCU  recognizes  this  inter- 
rupt, the  MCU  reads  the 
time  from  the  6818  and  dis- 
plays it.  As  soon  as  that 
data  is  read,  the  MCU  is  re- 
configured for  a  keyboard 
entry.  The  rest  of  the  one- 
second  period,  the  MCU  is 
waiting  for  a  button  to  be 
pushed,  The  amount  of 
time  required  to  read  the 
time  [<  50  ys)  is  the  only 
time  that  depressing  a  key 
could  possibly  disturb  the 
actual  data  read  But  since 
any  key  depression  would 
be  greater  than  20  ms,  the 
incorrect  frequency  would 
be  displayed,  then  immedi- 
ately jump  out  of  the  time- 
display  mode  and  redisplay 
the  last  frequency. 

Band  and  Mode  Switching 

For  the  vfo  to  be  used 
conveniently  with  a  multi- 


Ail  other  locations  are  $00* 
$  denotes  hexadecimal  notation. 

Fig  9(bl  This  program  must 
be  burned  into  the  74LS470 
PROM  of  bandswitching  cir- 
cuit 

tion  registers  in  the  MCU 
are  set  up  to  talk  to  the 
6818  Data  is  then  trans- 
ferred to  the  681 8's  RAM. 
As  soon  as  the  data  transfer 
Is  complete,  the  MCU  is  re- 
configured for  inputs  from 
the  keyboard.  The  actual 
transfer  time  is  so  short 
(<300  IAS]  that  no  matter 
how  hard  the  operator  tries, 
he  cannot  hit  another  key 
before  the  data  transfer  is 

22     T3  Magazine  *  June  J  982 


LO 

9HHJ 

I    l-F 

VFO 

1 

. 

,j 

1 

' 

_^^ 

epF 

^^     ™ 

Ji*nis 

k 

-^ 

apf 

L  -an  LiTBa 

f  ZQ  WTna 

HWA  no 

aoM 

\/ 

Jp 

-^ 

LI»F 

■ 

1 ' 

i 

b                                                                                                                                                                                                                                               M 

^ i 

M«A  no 

inn 

-^^ 

LPF 

1 

N 

AMP 

u^ 

Fig.   10.  Block  diagram  oi  a  complete  single-conversion 
transceiver  controlled  by  the  microprocessor  vfo. 


IMK>E   5W1TCH  IM  TI4AMSC£lVtfl 


/ 


*5V 


u 


x — r; 


m 


SET  FOfi 

APPROPRIATE 
FflEOUENCT   SHIFT 


i 


,01 


wcfiftd^Tj 


lOOK 


rr 
I 


MVI04 


JE 


1  nCFLACES  C34 
I  m  FIG   3 


Fig.  n.   Mode  switching  for  rigs  which  display  actual 

operating  frequency  (not  carrier  frequencyl 


Ha 
*I2V 


t 


CLOSE  FQR,——^  — 
RJT  * 

— r^* — L« 


5 


•  5V 
4 


R43 

FINE   TUJ^E 


R18 

I  9K 


/ff 


ON   PANEX 


|OiM« 


brii  CIRCUIT 


mMOj 


SET  BIT  tktm  FiNf   TUNE   FM   MiD  PO^ClON 

TURN  OH  fliT  Am  TUNC  FOR  HlAT  NOTE 
TUflN   Orr  AND  A&JUST   R40  FOR   SAME   PITCH 

USE   AS  REQLPinED 


Fig.  12,  Adding  R  IT  and  fine  tuning  to  the  vfo.  Most  of  these 
components  mount  on  the  main  circuit  board. 


band  transceiver,  some 
method  must  be  provided 
to  tell  the  external  PLL  sys- 


tem which  MHz  segment  it 
IS  on.  This  function  is  imple- 
mented as  follows. 


Whenever  the  frequency 
is  sent  to  the  on-board  syn- 
thesizer, the  two  most  sig- 
nificant digits  (MHz)  are 
sent  serially  to  the  data  pin 
(PCO),  If  operating  on  5 
MHz,  the  sequence  of 
events  is:  (1)  set  up  the 
5-6-MHz  synthesizer,  (2) 
pulse  the  SQW  pin  of  the 
6818  (resets  the  external 
counter),  (3)  set  the  clock 
enable  pin  (allows  clock 
tine  to  increment  counter), 
(4)  send  out  five  pulses  (for 
5  MHz),  (5)  clear  the  clock 
enable  pin,  and  [b)  continue 
with  program. 

The  circuit  for  a  simple 
decoding  scheme  using  the 
MC1451fi  dual  BCD  count- 
er is  shown  m  Fig  8.  One 
use  for  the  outputs  from  the 
counter  is  to  provide  auto- 
matic bandswitching. 

References  were  made 
earlier  to  bandswitching  on 

an  FT407  or  FT-707.  Fig  9[a) 
shows  how  it  may  be  ac- 
complished By  taking  the 
outputs  of  the  binary  de- 
coder of  Fig,  8  and  running 
them  into  a  74LS470  Pro- 
grammable Read  Only 
Memory  (PROM),  certain 
combinations  of  frequen- 
cies may  be  turned  into 
levels  which  may  drive  cir- 
cuitry to  change  bands.  The 
PROM  must  be  pro- 
grammed as  per  Fig.  9(b). 
Unlike  older  transceivers, 
the  FT-107  and  707  do  not 
use  a  bandswitch  which 
runs  the  entire  depth  of  the 
rig.  The  actual  switch  is  on- 
ly a  double-pole  type  which 
switches  relays  within  the 
radio  By  placing  this  switch 
in  an  unused  position  and 
adding  appropriate  drivers, 
the  remote  vfo  can  switch 
bands,  too! 

I  originally  used  this  vfo 
with  a  simple  home-brew 
transceiver  that  operates 
on  both  80  and  20  meters, 
with  no  external  hetero- 
dyne oscillator  This  single- 
conversion  radio  provides 
an  excellent  "simple"  radio, 
with  the  T2  controlling 
everything,  including  the 
bandswitching  of  the  filters. 


Fig,  TO  shows  a  block  dia- 
gram of  this  radio. 

The  vfo  provides  the  ac- 
tual frequency  selection, 
with  the  display  presenting 
the  operator  with  the  car- 
rier frequency.  If  you  are 
upgrading  a  standard  radio 
such  as  Heath  or  Collins 
where  there  was  an  analog 
method  of  readout  there 
will  be  no  problem  in  con- 
version. But  it  you  are 
already  using  a  digital 
readout  that  displays  not 
the  carrier  frequency,  but 
the  actual  "talk  frequen- 
cy/' then  an  additional 
modification  must  be  made 
to  the  system.  This  mod  will 
shift  the  reference  oscilla- 
tor  by  1.5  kHz,  either  up  or 


MODE 

DISPLAY 

VFO 

PURPOSE 

(PC2J,0) 

FREQUENCY 

000 

3.0000 

5.0000 

INVERTED  80-20M 

3.9999 

5.9999 

AUTO  REV  ON  20 

14.0000 

5.9999 

MHZ  NOT  SENT 

14.9999 

5.0000 

PC2  1  ^  80 
0  =  20 

001 

XX.OOOO 

5.5000 

FT107  MODE 

XX.5000 

5.0000 

MHZ  SENT 

010 

XX.OOOO 

5.9999 

INVERTED 

XX,9999 

5.0000 

MHZ  SENT 

101 

XX.OOOO 

5.0000 

NORMAL 

XX.9999 

5.9999 

MHZ  SENT 

110 

aoooo 

5.9999 

80-20M 

3.9999 

5.0000 

AUTO  REV  ON  20 

14.0000 

5.0000 

MHZ  NOT  SENT 

14.9999 

5.9999 

PC2  1  =  80 

0  =  20 

Table  t.  Vfo  options.  MCU  I/O  pins  PCO,  PCI.  and  PC2  are 
strapped  to  1  (-^5  V)  or  0  (groundl  depending  on  the  vfo 
mode  you  select 


Parts  List 

Y4 

18.36  Of  18.86  MHz 

Component 

Valye  (Q) 

Quantity 

RYl 

Relay  (RIT) 

1 

R1,8,14 

47 

3 

01,27.10.11,13,43. 

IhF 

17 

R2.35 

22k 

2 

44,14.15;16.18.2€ 

> 
K 

R 11, 16,29 

100k 

3 

27.45.46,49 

R4 

5.6K 

1 

C3,C4 

300  pF 

2 

R6 

910 

1 

G5 

200  pF 

1 

R7.15 

680 

2 

06 

.47fjF 

1 

R9 

270 

1 

OS 

65  pF 

1 

R10 

50k  pot  (small) 

1 

09 

91  pF 

1 

R 12, 13, 15,26, 

15k 

7 

012,20.24,28.30 

1000  pF 

5 

27,28,30 

017,19 

82  pF 

2 

R17,R33 

Ik 

2 

021 

10  pF 

1 

R18 

750 

1 

022 

20  pF 

1 

R19 

68 

1 

023 

12  pF 

1 

R20 

56 

1 

025,31 

150  pF 

2 

R21 

a2k 

1 

029,32 

470  pF 

2 

R22 

39k 

1 

033.47,48 

Uf 

3 

R23 

20k 

1 

034,36 

10-40  var 

2 

R24,31,39, 

10k 

12 

035 

50  pF 

44-51,3 

037 

39  pF 

R32 

4.7k 

1 

038 

.47  ^F 

R34 

200k 

1 

039 

M0-40pF 

R36 

56k 

1 

040 

•39  pF 

R37 

3.6k 

1 

041,42 

2hF 

2 

R3e 

1.8k 

1 

C50 

10  ^F 

R40.41,42 

5k  pot 

3 

01 

2N5484 

(2  panel,  1  PCS) 

02.3,5,6 

2N22?? 

4 

R5 

27k 

1 

04 

2N3906 

R43 

10  meg 

1 

D1A5.6 

1N914 

R53 

300 

1 

02 

MV104 

R58 

?.?k 

1 

D3 

MVB30 

LI 

150  ^H 

1 

D7,9 

irMX)2 

2 

L2 

1-2  |iH 

1 

tcio 

LM358 

(13  turns  #28  Vt  ' 

fCI 

•M068(^T2or 

fonn) 

68705P3 

L3,4 

6*8  fiH 

2 

fC2 

MC146B18P 

L5,e 

1.8  mH 

2 

iC3 

M0145000P 

B1 

MD108 

1 

104 

GE  Display 

double-balanc^ 

105 

MC14518P 

mixer 

106 

•MC145155P 

Y1 

4.096  MHz 

1 

107 

MC7805 

Y2 

4.194  MHz 

1 

ice,9 

MC78L05 

2    1 

Y3 

•2,048  MHz 

1 

•denotes  MC88705P3  option. 

73 Magazine  •  June,  1982     23 


Fig.  73,  Main  vfo  PC  board  (foil  side). 


down,  depending  on  which 
sideband  you  are  on  By 
tapping    off    the    mode 

switch  in  the  rig,  the  fre* 
quency  may  be  shifted  au- 

tomatically 

Fig.  11  gives  an  example 
of  how  this  may  be  ac- 
complished. In  this  dia- 
gram, a  voltage  divider  is 
switched,  depending  on 
what  mode  the  radio  is  in. 


Of  course,  an  additional 
position  on  the  switch  may 
be  used  for  CW,  AM,  etc. 
This  mod  must  be  made  if 
using  the  vfo  as  a  compan- 
ion for  another  digital  rig 
which  uses  a  5-to-6-MHz 
vfo. 

RIT 

In  almost  every  rig  that 
I've    owned,    receiver    in- 


cremental tuning  (RIT)  was 
a  must  for  operating  con- 
venience. This  vfo  provides 
the  user  with  not  only  a  RIT 
control  but  also  a  fine- 
tuning  adjustment  for  sta- 
tions  between  the  100-Hz 
resolution  of  the  vfo  The 
foil  pattern  for  all  RIT  com- 
ponents with  the  exception 
of  the  panel  controls  is  on 
the  PC  board,  including  the 


Fig.  14.  Display  PC  hoard  {foil  side). 


relay  used  to  switch  it  in 
and  out  Fig.  12  illustrates 
how  the  RIT  is  imple- 
mented, (Thanks  to  Yaesu 
for  their  design.) 

Construction  and 
Alignment 

I  recommend  that  the 
vco  be  built  first,  This  is  the 
most  difficult  portion  of  the 
vfo,  and  the  rest  comes 
easily  once  this  is  com- 
pleted. After  the  vco  is 
built,  check  its  frequency 
range  by  turning  the  slug  in 
coil  L2.  It  should  encom- 
pass the  1 2  J6-1 3.36-MHz 
range  required.  After  this 
has  been  built,  build  the 
rest  of  the  rf  section 
(IB-MHz  VXD  and  filters). 
Only  after  you  have  5  to  6 
MHz  coming  out  of  the  fil- 
ter stage  should  you  pro- 
ceed with  the  digital  sec- 
tion. Depending  on  which 
parts  you  are  using  (T2  or 
P3).  select  the  appropriate 
jumpers  and  install  the  rest 
of  the  parts    The  6818  fre- 


24    73Magazme  •  June,  1982 


—  SOCKET    TO 

DISPLAY 

AND 

KEYBOARD 


BATTERY 


BCD 

OUTPUTS 


R45    THRU    RSI 


NC  -  NO 

DOTTED    LINES- JUMPERED    FOR    MC6805T2 


Fig.  15.  Component  placement  main  board 


qtligficy  may  be  adjusted  by 
placing  a  counter  on  pin  21 . 
Trinnmer  C36  should  be  ad- 
justed to  read  4.194306 
MHz  If  you  cannot  bring  it 
exactly  on  frequency,  some 
adjustment  of  fixed  capaci- 
tor C37  may  be  required. 

If  you  are  using  the  P3, 
the  frequency  of  the 
MC145155  may  be  ob- 
served on  pin  15  of  the  part, 
Adjust  C39  for  2,048  MHz. 
If  using  the  T2,  use  a  low- 
capacitance  probe  on  pin  5 
of  the  MCU  and  adjust  C34 
for  4.096  MHz.  If,  upon 
power-up,  the  unit  appears 
dead,  it  is  time  to  borrow  an 
oscilloscope  to  do  some 
checking.  First,  check  the 
jumpers  and  power  sup- 
plies.  Next  check  to  see 
that  the  oscillators  are 
functioning  properly. 

If  the  unit  seems  to 
operate    properly    but    the 

vco  will  not  track,  be  sure 
that  the  loop  filter  is  prop- 


erly built  and  that  there  is  a 
feedback   frequency   back 
to  the  PLL.  Also,  check  for 
the  obvious  solder  short. 
Figs.  13  and  1 5  are  the  PC 


layouts    for    the    vfo    and 
display,   respectively.   Figs. 
14  and  16  show  component 
placement. 
Table  1  lists  the  available 


modes  of  the  vfo  system. 
The  modes  are  selected  by 
strapping  I/O  pins  PCO.  PCI, 
and  PC2  to  either  -F5  V  or 
ground  through  15k   resis- 


"-  TO  KEYPAD 


Fig.  16.  Component  placement,  display  board.  Driver  chip  fits  under  display  unit,  on  the 

same  side  of  the  board  Display  unit  is  elevated  above  the  board  by  segments  of  high- 
profile  IC  sockets  [see  photos). 

73 Magazine  •  June,  1902    25 


f 


M 


Display  board.  The  liquid  crystal  display  (LCD)  un/t  pkfgs 
into  a  home-brew  socket  composed  of  pieces  of  two  40-pin 
IC  sockets. 


Display  board.  This  view  shows  how  the  display  driver  /C 
mounts  beneath  the  LCD  unit 


tors.  In  the  first  column  of 
the  table,  a  0  indicates  the 
pin  is  connected  to  ground, 
while  a  1  means  the  pin  is 
connected  to  +5  V,  The 
table  shows  the  available 
modes  vs.  the  frequencies 
produced.  Also  included 
are  the  purposes  behind 
each  mode.  The  mode  is 
read  at  reset  time  on  PCO, 
PCI,  and  PC2. 

Take  it  from  Malnerd  . . . 


Getting  the  Parts 

Approximate  costs  of  the 
high-value  items  of  the  proj- 
ect are; 

•  MC6805T2L2 -$1 2.00- 
15.00 

•  MC68705P3-$50.00  [not 
needed  if  the  T2  ts  used) 

•  MC1451 55-57 J2    {not 
needed  if  the  T2  is  used) 

•  MCI  4681 8— J1 0  00 


•  MCI  45000 -SI  2.49 

•  8'digitLCD-$26.40 
The  MC6805T2  contairv 

ing  the  program  used  for 
this  project  is  an  evaluation 
part  under  the  number 
MC6805T2L2  (ceramic  case) 
and  is  available  from  any 
Motorola  distributor,  as  is 
the  MC68705P3,  the  alter- 
native MPU. 

The  liquid  crystal  display 


(GE  part  LXD69D7R09)  is 
available  from  any  GE  dis- 
tributor (Hamilton  Avnet, 
etc.). 

My  heartiest  thanks  go  to 

Helge  Cranberg  and  Mike 
Pendley,  who  provided  me 
with  some  necessary  rf 
savvy,  and  U I  rich  Rohde, 
who  gave  me  some  insights 
into  PLL  system  design  ■ 


TM 


''Yoall  have 
best  matclied  pair 
intownr' 

Matching  your  antenna  and  trajiamltter 
requires  the  aGcuraqy  of  our  1000-A  Iff 
Wattmeter  for  serious  DXing,  Trlimiiiiig  your 
antenna  for  the  frequency  you*re  working 
ensures  yuuTl  get  majdmum  power  out  and  minimum 
reflected  power  hack.  Get  more  reach  with  the  best 
matched  pair  intowiL 

You  can  depend  on  Dielectric, 
TUB  MAINS  SOUBCB    for 

a-yBar-warranted  BF  pre 
quality  meters,  couplers 


and  loads. 


1961  Dmi&c: 


■  Ttmijnical»Of>S 


Call  us  for  more  information  and  the  name  of 
your  nearest  dealer. 


We're  b  Courage  Center 
HANOI  HAM  sypportsr. 


^  ^       Hew  Hx^lud  Integrity  and  craftsnuooiJiip 

^  » . .  u  trmdltlonAl  aa  Maine  Lobcter, 

DIELECTRIC  COMIVIUIMICATiaiMS 

A    UNIT     OF     GENERAL     SiGNAU 

lUymonil,  Maiii«  04071  IIEA  /  £07-668-4888  /  800-341-9676  / 


*^17 


71D-a£d-6d90 


s?):3L-!^!ltil:iT  T!  1 1 .  iu:  kl  r 


Organize  %;aur  shack  wHk  a 

CLUTTERFREE  MODULAR 
CONSOLE   $203,35 

Large,  42  '  H  x  57"  W  x  29"D 
Strong  groove- con stryction 
Mar-resistant  wood  grain  finish 
Optionsp  drawers  &  face  plate 
For  ham  or  home  computer 
Visa  and  Master  Charge 

CLUTTERFREE 

MODULAR 
CONSOLES 

P.O.  Box  5103  Tacoma.  WA  98405 
f206W59-t6t1      ^B§ 


26     73 Magazine  *  June,  1982 


O^J^GiTLC  O^TTy 


m 


^  t 


•** 


*** 


***H 


*■•-• 


*^»^^, 


By  popular  acclaim  -  the  leader  and  king  of  radio  teleprinter  communieations  -  the  HAL 
DS3100ASR  and  ST6000.  When  combined  with  the  MSO3100  Message  Storage  Option  and  a 
hard-copy  printer,  you  have  the  premier  RTTY  station •  Discriminating  operators  the  world- 
over  choose  the  DS3100  and  ST6000  for  their  stations  over  any  other  equipment.  The  DS3100 
and  ST6000  have  set  new  standards  of  comparison  for  commercial  and  amateur  RTTY  data 
communications;  they  are  representative  of  the  high  standards  of  quality  and  performance  for 
which  HAL  is  known  throughout  the  world.  Put  your  best  RTTY  signal  forward  with  the 
DS3100  and  ST6000! 

•  Send  and  receive  ASCII,  Baudot  and  Morse  code 
^  Full  length  72  character  tines  and  24  line  screen 

•  True  "ASR"  operation  —  pretj^je  while  receiving 

•  50  Line  pretype,  on-screen  transmit  buffer 

•  150  Line  receive  display  buffer 

•  MSO3100  adds  450  lines  of  MAILBOX  message  storage 

•  P31  green,  12  inch  display  Bcreen  is  built-in 

•  Control  functions  are  clearly  marked  on  keytops 

•  On-screen  status  indicators  with  real  time 

•  Upper-lower  case  ASCII  with  ALL  control  codes 

•  45.  50,  57,  74,  100  baud  Baudot 

•  110,  150,  300,  600,  1200,  1800,  2400,  4800,  and  9600  baud 
ASCII  -  full  or  half  duplex 

•  1  to  175  wpm  send  and  receive  Morse  code 

•  Current  loop  or  RS232  I/O  interface 

•  ST6000  has  tuning  oscilloscope  and  loop  supply 

•  Three  BTTY  shifts:  170,  425,  or  850  Hz 

•  Multiple  active  RTTY  filters  and  detector  stages 

•  Crystal  controlled  RTTY  transmit  tones 

•  Printers  available  for  hard-copy  of  all  3  codes 

Writeor  call  formore  details.  See  the  DS3100,  MSO3100,  ST6000,  andprinters  at  your  favorite 
HAL  dealer. 


I 


HAL  COMMUNICATIONS  CORP. 

BOX  365 

URBANA,  ILLINOIS  61801  217-367-7373 


.^345 


J 


\si  iHS^n 


4   k 


The  IjSBGi  and  EBG\ 

offer  performance  and  versatility 
for  tliose  wiio  demand  the  uitimate! 


TR7A  Transceiver 


•  CONTINUOUS  FBEQUENCY  COVERAGE  -  1.5  to  30  MHz  full 
receive  coverage.  TTie  optional  AUX7  provides  0  to  l.S  MHz 
receive  plus  transmit  coverage  of  1 .8  to  30  MHz.  for  future 
Amateur  bands.  MARS,  Embassy »  Govemmefit  or  Commercial 
frequencies  (proper  authorization  required). 

•  Full  Passband  Tuning  (PBT)  enhances  use  of  high  rejedjon 
S-pole  crystal  filters. 

New!  Both  2.3  kHz  ssb  and  500  Hi  cw  crystal  Afters,  and  9 

kHz  a-m  selectivity  are  standard,  plus  provisions  for  tv^o 
additional  filters.  These  8-pote  crystal  filters  in  conjunction 
with  careful  mechanical /electrical  design  result  In  realizable 
ultimate  rejectbn  in  excess  of  100  dB. 

Newl  The  very  effective  NB7  Noise  Blanker  Is  now  standard* 

Newl  Built  tn  lightning  protection  avoids  damage  to  solid-state 
components  from  lightning  induced  transients, 

Newl  Mic  audio  available  on  rear  panel  to  facilitate  phone  patch 
connection. 

•  State-of-tlie-art  design  combining  solid-state  PA. 
up-converslon.  high-level  double  balanced  1st  mixer  and 
frequency  synthesis  provided  a  no  tune-up.  broadband,  high 
clynamic  range  transceiver. 


R7A  Receiver 

•  CONTINUOUS  NO  COMPROMISE  0  to  30  MHz 
frequency  coverage, 

•  Full  passband  tuning  (PBT). 

Ne  ' '  NS7A  Noise  Blanker  supplied  as  standard. 

•  State-of-the-Art  features  of  the  TR7A.  plus  added 
flexibility  with  a  low  noise  10  dQ  rf  amplifier 

Newf  Standard  ultimate  selectivity  choices  Include  the 
supplied  2.3  kHz  ssb  and  500  Hz  cw  crystal  filters,  and 
9  kHz  a-m  selectivity.  Capability  for  three  accessory 
crystal  filters  plus  the  two  supplied,  including  300  Hz* 
1.B  kHz,  4  kHz.  and  6  kHz.  The  4  kHz  filter,  when  used 
with  the  R7A's  Synchro-Phase  a-m  detector,  provides 
a-m  reception  with  greater  frequency  response  within  a 
narrower  bandwidth  than  conventional  a-m  detection, 
and  sideband  selection  to  minimize  interference  potential* 

•  Front  panel  pushbutton  control  of  rf  preamp*  a-m /ssb 
detector,  speaker  ON /OFF  switch,  i-f  notch  filter 
reference-derived  calibrator  signal,  three  age  release 
times  {pius  AGC  OFF),  integral  ISO  MHz  frequency 
counter /digital  readout  for  external  use.  and  Receiver 
Incremental  Tuning  (RIT). 


The  ^Twrns"  S 


FREQUENCY  FLEXIBILrTY.  The  TR7A/R7A  combination 
offers  the  operator,  particularly  the  DX'er  or  Contested  fre- 
quency control  agility  not  available  tn  any  other  system.  The 
'Twins"  offer  the  only  system  capable  of  no-compromise 
DSR  (Dual  Simultaneous  Receive).  Most  transceivers  allow 
some  external  receiver  control  but  the  "Twins"  provide 
instant  transfer  of  transmit  frequency  control  to  the  R7A 
VFO.  The  operator  can  listen  to  either  or  both  receiver's 
audio,  and  instantly  determine  his  transmitting  frequency  by 


appropriate  use  of  the  TR7A"s  RCT  control  (Receiver 
Controlled  Transmit).  DSR  is  implemented  by  mixing  the  two 
audio  signals  in  the  R7A 

•  ALTERNATE  ANTENNA  CAPABIUTY.  The  R7A's  Antenna 
Power  Splitter  enhances  the  DSR  feature  by  allowing  the  use 
of  an  additional  antenna  (ALTERNATE)  besides  the  MAIN 
antenna  connected  to  the  TR7A  (the  transmitting  antenna). 
All  possible  splits  between  the  two  antennas  and  the  two 
system  receivers  are  possible. 


DRAKE 


SpecHlcatiafis.  avafiaUltty  aM  puces  subject  to  cl^aftge  wtttiflut  notice  or  oUiflStiQA. 

your  Drake  dealer  or  write 

for  additional  Inforrnation. 


COMING  S  n;  *    New  RV75  Synthesized  VFO 
Compatible  with  TR5  and  7-Llne  Xcvrs/Rcvre 

•  FriquiRcy  Syntheliea  tor  crystal  control  led 
stability  •  VRTO  (Vuiablt  Rati  Tuning  OsdlLator') 
adijus^  ty fling  rate  as  function  of  t*jnmg  speed 

•  B«solutloi!  to  to  Hi  •  Three  programmable  fixed 
f r«i|tjencies  for  MARS.  etc.  •  Split  or  Transceivt 
operation  witl)  mairi  transceiver  PTO  or  RV7S 


R.  L.  DRAKE  COMPANY  •  540  Richard  street;.  Miamisburg,  OhlD45342  •  Plione  151 3)  S6 6-2421  •  Telex2BS-017 


Patent  pending 


i 


far  above  average ! 


rf 


With  the  new  TR5 


COMtNG  SOON 

RV75  Synthesized  VFO 

featuring  the  Drake  "VRTO" 

-  Frequer^cy  SyRtJiesJiied  for  cr^stai-eon trolled 
statJilfty  *  VBTO  (Variable  Rate  Tuning  Oscillator* ) 
IJusts  tuning  rati  as  fynction  of  tuning  speed, 
ResQ^utlon  to  10  Hz  •  Three  programmable  fixed 
frequencies  for  MARS,  etc  '  Split  nr  TranKti ve 
operation  with  main  transceiver  FTO  or  RV7S 


J 


*  Patent  pending 


versatility  and  value  are  spelled  D-R-A-K-E . . . 


lYIUAMIC 

RANGE 


The  dynamic  range  of  the  TR5  is  unexcelled  by  any  transceiver  in  its  class.  The  TRS's 
greater  than  0  dBnn  third  order  intercept  point  (85  dB  two-tone  dynamic  range)  at  20 
kHz  spacing  can  be  achieved  only  by  the  use  of  a  passive  diode-ring  double  balanced 
nriixer.  Drake  was  the  first  to  bring  this  technology  to  the  Amateur  market  with  a 
high-level  mixer  in  the  TR7. 


When  you  purchase  a  TR5.  or  any  Drake  product,  you  acquire  a  product  of  the  latest 
production  techniques,  which  provide  reliable  performance. 

Yet  with  a  product  as  sophisticated  as  one  of  today's  transceivers,  after-sales 
sen/ice  is  a  must.  Ask  any  Drake  owner.  Our  Customer  Service  Department  has  a 
reputation  second  to  none. 


ELIABLE 

SERVICE 


/Accessories 


Kilowatt 
"^     amplifier 


Drake  is  the  only  Amateur  Radio  manufacturer  who  offers  a  full  complement  of 
accessories  to  satisfy  almost  every  desire  the  HF  Amateur  may  have.  This  wide 
selection  allows  any  operator  to  assemble  a  station  which  meets  his  needs*  and 
assures  compatible  interfacing  and  styling  instead  of  a  desk  full  of  equipment  with 
a  variety  of  styling  and  poor  operation  as  a  system. 

Everyone  wants  to  be  heard!  The  accessory  L75  and  its  3-500Z  (1200  watts  PEP 
input)  and  a  decent  antenna  will  do  the  trick*  This  rugged  self-contained  amplifier/ 
power  supply  will  put  the  TR5  on  an  even  footing  with  the  best  of  them. 


Engiimeering 


The  TR5  and  all  Drake  Transceivers,  are  backed  by  the  best  in  engineering.  The  TR5 
Is  the  result  of  an  extensive  engineering  effort,  combining  proven  past  techniques 
and  Ideas  with  new  state  of  the  art  concepts. 

As  a  result,  the  TRS  will  not  be  superceded  by  a  new  model  every  six  months.  It 
represents  a  true  radio  communications  value  that  will  provide  many  years  of 
operating  enjoyment. 


See  your  Orake  dealer 
or  write  for 
additional  information. 


w^m 


Peatur?5,  ava(Edbil%  and  pnces  subject  to  cftangG  witjiout  nottce  or  ot^tifatiof). 


R.  L.  DRAKE  COMPANY 


DRAKE 


Hff 


540  Richard  St.,  Miamis&urg,  0hiD4534E,  USA 
Phpne;  t5l  31  eB6-&42l  •  TeleK:  2SS-01 7 


Keith  Cremer  AK0Q 
421  N.  P/easanf  HitI  Bhd 
Des  ^foJ^es  tA  S0S17 


Surviving  the 
Unthinkable 

part  II:  some  practical  ideas 


In  part  I,  I  talked  about 
the  idea  of  emergency 
communications  after  a 
nuclear  attack  and  the 
benefits  the  Amateur  Ser 
vice  might  provide.  In  this 
part,  we'll  talk  about 
specific  steps  that  each  of 
us  can  take  First,  though, 
let's  set  the  stage: 

Imagine  this  situation  for 
a  moment:  The  most  incom- 
petent of  operators  walked 
into  your  shack  and  for  a 


fraction  of  an  instant  con- 
nected your  receiver's  an- 
tenna terminals  to  a  high- 
voltage  distribution  line. 
The  result  was  a  40-kV, 
1,000-Amp  shock  to  the  in- 
put of  your  receiver.  There 
wouldn't  be  very  much  left 
of  your  sensitive  input  cir- 
cuits, to  say  the  least 

This  sounds  like  an  im- 
possible situation.  I  only 
wish  that  it  were  truly  im- 
possible. But  in  today's  cri- 


ANT|I4«^4     FESO   CABLE 


403 LVN    WASHER 


PIER 


GROUND 


EARTH 

AMDREWS    GROyfiDiH^    KIT 


Fig.  1.  Recommended  ground  connections  at  tower  base. 
30     73  Magazine  •  June,  1982 


sis-oriented  world,  the  situ- 
ation is  indeed  within  the 
realm  of  possibility.  The 
40-kV  shock  is  what  civil-de- 
fense experts  say  would  be 
the  result  of  a  nuclear  blast 
in  the  vicinity  of  most  any 
piece  of  unshielded  wire,  in- 
cluding telephone  wires, 
power  lines,  antennas,  and 
feedlines.  The  phenomenon 
is  commonly  referred  to  as 
a  nuclear  electromagnetic 
pulse  (EMP  or  NEMP). 

This  kind  of  pulse  is  so  ex- 
treme in  amplitude  that 
many  normal  lightning  pro- 
tectors are  useless.  For  ex- 
ample, a  typical  lightning 
pulse  has  about  a  lOOmi- 
crosecond  duration,  with  a 
5-microsecond  rise  to  its 
peak.  A  high-altitude  EMP 
pulse  can  be  expected  to 
have  a  1 -microsecond  dura- 
tion and  a  10-nanosecond 
rise  to  its  peak,  That's  not 
enough  time  for  many  com- 
mon lightning  arrestors  to 
work. 

In  the  following  pages 
we'll  talk  about  some  of  the 
EMP  protective  measures 
which  should  be  taken  on 
your  equipment  Without 
protection,  sensitive  semi- 
conductors would  be  most 
likely  to  fail  and  put  you 
out  of  business  when  your 
services  may  be  needed 
most. 


But,  first,  why  should  we 
even  be  concerned  about 
protection?  After  all,  any 
nuclear  exchange  seems  to 
be  so  outrageously  incom- 
petent on  the  part  of  world 
leaders  that  it  seems  that  it 
never  could  happen.  Unfor- 
tunately, however,  we've 
seen  in  the  last  few  years 
that  many  improbable 
things  such  as  revolutions, 
hostage  taking,  etc.,  have 
actually  occurred. 

Even  though  we  all  hope 
and  pray  that  a  nuclear  ex- 
change does  not  occur,  let 
us  not  underestimate  the 
devastating  and  paralyzing 
effects  of  such  an  ex- 
change. Simply  imagine,  for 
a  moment,  a  world  with 
hundreds  of  mitlions  of  US 
and  Russian  citizens  killed 
and  tens  of  mi! lions  more 
severely  and  untreatably 
burned,  near  death,  and 
starving.  Major  cities,  with 
their  sophisticated  hospi- 
tals,  police,  telephone  com- 
munication systems,  radio 
and  television  stations, 
transportation,  food  dis- 
tribution networks,  finan- 
cial centers,  and  manufac- 
turing centers  all  eliminat- 
ed—gone—not much  us- 
able left,  and  most  likely 
too  radioactive  to  ap- 
proach  for  many  years  to 


come.  The  situation  might 
be  reminiscent  of  the  Cam- 
bodian experience  of  re- 
cent years,  where  a  ruthless 
and  irresponsible  leader- 
ship evacuated  the  cities 
and  forced  an  entire  coun- 
try into  an  unnecessary  di* 
saster.  Imagine  that  situa- 
tion in  your  community, 
among  your  friends  — per- 
haps worldwide! 

However,  even  in  the 
worst  of  disasters,  there  will 
be  some  survivors.  If  not  us, 
then  our  friends  or  rela- 
tives. Perhaps  our  children 
or  grandchildren  will  be 
among  those  fortunate  sur- 
vivors-  There  also  will  be 
some  amateur  radio  opera- 
tors.  Perhaps  the  best  thing 
that  w.^  can  do  for  these 
people  faced  with  a  com- 
pletely unknown  and  hos- 
tile environment  is  to  en- 
sure that  they  have  every 
possible  assistance  avail- 
able to  help  them  through 
the  crisis. 

In  communications,  that 
assistance  means  that  in  a 
world  where  the  estab- 
lished public  system  is  no 
longer  available,  the 
technical  preparations  of 
amateur  radio  operators 
may  make  the  difference 
between  life  and  death  for 
countless  hundreds  of  thou- 
sands. It  could  be  the  final 
foothold  in  their  struggle 
for  survival.  After  all,  assis- 
tance during  disasters  is 
one  of  our  key  elements, 
and  a  justification  for  an 
Amateur  Radio  Service.  On- 
ly amateur  radio  operators 
can  supply  an  organized 
communication  system 
from  almost  every  commu- 
nity in  this  country.  Only 
amateur  radio  operators 
can  supply  this  system  with 
a  substantial  portion  of  the 
surviving  equipment  easily 
made  operational  after  the 
shock  of  a  nuclear  explo- 
sion. Citizens  Band  equip- 
ment for  the  most  part 
would  be  rendered  totally 
useless  by  its  unprotected 
reliance  on  semiconduc- 
tors  and    its  tendency  for 


ANTENNA 


ANTEMNA 


SPARK   GAP 


SPARK    GAP 


L--C.P.   CLARE    CO,    \JBU-Z-2tffO 
[       REACTION     TIME    GAS     GAPS 
(OR    EQUIUALEMT) 


COAXUL     CAPLE     SHIELD 


HEAVy     WALL    FERROUS    CONDUFT 
3    INCH     JVllNlMUiyl     OLAMETEff 


COUMTERPOISE 


EARTH 


fig.  Z  Suggested  use  of  gas  gaps  in  an  antenna  balun.  Note  that  this  approach  uses  a  thick- 
wall  conduit  around  the  coax. 


total  disorganization  even 
io  times  when  there  is  no 
crisis. 

The  job  of  amateur  radio 
equipment  protection  is 
easy  once  we  realize  that  it 
does  not  need  to  be  diffi- 
cult or  complex.  Most  any 
technical  or  non-technical 
operator  can  accomplish 
some  EMP  protection  on 
short  notice,  with  a  very 
small  outlay  of  money.  The 
objective  is  to  safely  bypass 
your  equipment  and  any  in- 
coming connections  when 
they  are  presented  with  an 
EMP  signal  composed  of  40 
to  50  kV  and  current  in  the 
order  of  1,000  Amperes. 

(t  is  interesting  to  note 
that  much  of  the  EMP  pro- 
tective equipment  avail- 
able today  has  been  de- 
signed since  our  country 
stopped  testing  nuclear 
weapons.  As  a  result,  none 
of  it  has  received  the  only 
true  test  of  reliability 
—  on-the-job  testing  — al- 
though EMP  simulators  are 
used. 

Because  of  the  lack  of 
widespread  testing  capa- 
bilities, the  only  really  prov- 
en method  of  protection  is 
also  the  simplest  Under 
this  approach,  all  equip- 
ment to  be  protected 
should  be  disconnected 
from  all  external  wires  and 


AT    RECEIVER 


TO 
ANTENNA* 


PANEL    PEN£TRATIC>N 


ymmnji, 


&W\li^^(!i 


CONVENIENCE     BOX 


DIODE  BRIDGE  SERIES 
450  FCC  PROTECTOR^ 
OR    EQUIVALENT 


\ 


RF    GASKET    AfiO    BOLTEO 
COVER 


SHIELDED      ENCLOSURE 


fig.  3.  Coaxial  tee  protectors  used  in  a  receiver  circuit 


AT     TRANSMITTER    OUTPUT    OR    AT   AMTEIVNA 


TO  ANTENNA 


^ 


TEE 


r 


SOLID    PANEL 
PENETRATION 


FISCHER    CUSTOM 
COM*^UNlCATiONS 
(FCC)    GAS    GAP 
SERIES     250    OR 
^50     PROTECTOR 
OH    EQUIVALENT 

-SHIELOEQ 
ENCLOSURE 


fig.  4.  Coaxial  tee  protectors  shown  in  a  transmitter  circuit 


stored  in  a  thoroughly 
sealed  and  shielded  box. 
The  box  should  have  no 
holes  where  any  kind  of 
energy  can  get  in  and 
should  have  a  skin  made  of 
18-  to  26-gauge  metal  to 
provide  magnetic  shielding 
for  the  equipment  inside. 

Since  the  civil-defense 
planners  expect  to  have 
Americans  moved  to  a  safe 


location  30  to  200  miles 
from  their  community,  de- 
pending on  the  nature  of 
threat  to  that  community, 
the  equipment  should  like- 
wise be  moved  to  a  location 
30  to  200  miles  from  the 
community. 

Keep  in  mind  when  stor- 
ing your  equipment  that 
power  supplies  also  should 
be  shielded  and  stored  with 

73 Magazine  *  June,  1982     31 


3-4  IN    CONDUIT   MISERS 

A 


r 


jy^*    'tf 


SOLID    ^ANEL   SeCTiOM 


ADD  tMP  GROLiStG 
4/0  C^U.  COM-D  MIN 
ON    TPP    DF    SHELTER 


.4   IN   V.  UP 


IVEHT    AND    ORim 
*  SYSTEM 


ABdV£     »0OF 
leuRlED) 


Fig.  5,  Suggested  layout  for  communications  room  with 
remote  operation  of  equipment 


NOTE  4 


SPLJT 

SL£E¥E 
CLAIiPS 


tNCOW^G 

FEED£H 

CABLE 


NOTE    I 


NOTE    7 


■■  JIJ^JJL— J 


SOtDEff    dft  tJSE    $*»L1T 
SLEEVE     CLAMP 


QftUQE    COPPER    SHEETING 


F'&«fOD    PROTECTOR     HOUSmG 
NOTE    & 


LEAD  SMEATH 
TEniilNATtNG 
CftdLE 


NOTE    6 


F/g,  6.  7h/s  IS  one  recommended  method  of  protecting  a 
telephone  cable  system  against  EMP  transients.  Note  the 
heavy  emphasis  on  shielding.  The  numbered  notes  refer  to 
detailed  construction  specifications. 


your   equipment   because 

they  are  lust  as  susceptible 
to  an  EMP  transient  signal 
as  is  your  sensitive  trans- 
mitting and  receiving 
equipment,  A  publicly-re- 
leased 1970  Department  of 
Defense  publication  sug- 
gests that  if  equipment 
must  be  used  during  a 
threat  of  nuclear  attack,  at 

32     73 Magazine  •  June,  1982 


least  one  set  of  equipment 

(and  likely  more)  should  be 
held  in  reserve  in  the  event 
of  any  equipment  failure.  In 
the  ideal  case,  ham  opera- 
tors should  have  a  reserve 
available  due  to  equipment 
failure  caused  by  every  suc- 
ceeding attack. 

Good   grounds   are  very 
important  to  EjMP  protec- 


t 


-Wrtr 


^\ 


"-*t— r 


m  -  m  J 


r 


« 


ir 


^ 


METAL    OKiOE    V4«tST01l 


Fig.  7.  This  is  a  typical  vartstor  installation  applied  to  a 
fluorescent  tighting  circuit 


JUNCTION   eox 


QROONO     WIRE 


WOTOH 


mCTAL    OKlOE 
VARlSTOFtS    on 

EOUIVALENT 


Fig.  8.  This  is  a  suggested  circuit  for  EMP  protection  of  a 
J-phase,  4-wire  motor  using  metal-OKide  varistors  (MOVs) 
connected  between  each  hot  wire  and  ground. 


juMcttON    mojt 


GROUHD     lA^lRf 


T- 

^flexeblE  conouit 


NEUTRAL 


MOTOR 


IIETAL     OXIDE 
VARESTOR&    IM* 

EOUIVALENT 


Fig,  9.  Single-phase  motor  protection  using  MOVs  between 
hot  wires  and  ground. 


tion,  and  antennas  should 
be  well  grounded.  But  a 
smart  operator  would  keep 
a  longwire  and  tuner  stored 
as  if  to  be  used  for  Field 
Day  for,  in  any  emergency, 
the  antennas  can  be  expect- 
ed to  take  the  brunt  of  the 
effects  and  may  need  to  be 
replaced  in  the  fastest  time 
possible. 

The  Department  of  De- 
fense publication  EMP  Pro- 
tective Systems  suggests 
several  approaches  which 
should  be  used  if  you're  go- 
ing to  shut  down  for  a  while 


in  anticipation  of  an  attack. 
First  you  should  open  the 
master  power  switch  at  your 
service  entrance.  Second, 
all  circuit  breakers  should 
be  opened  and  all  critical 
equipment  should  be  turned 
off  or  disconnected. 

When  the  equipment  and 
power  are  to  be  restored,  all 
circuits  should  be  checked 
for  arc-overs  or  damage  be- 
fore power  is  restored  Be 
sure  to  disconnect  tele* 
phone  and  cable  television 
connections,  because  the 
advice  indicates  that  there 


The  response  to  our  S100 
Cash  Rebate  on  Robot  400  Scan 
Converters  and  Model  800 
Super  Terminals  was  truly 
impressive.  More  Robot  SSTV 
Scan  Converters  and  Robot 
terminals  were  purchased 
than  in  any  like  period 
in  our  history. 

To  encourage  the  continued 

growth  of  SSTV  on  the 

General  Class  Phone 

Bands,  Robot  is  extending 

our  $100  Cash  Rebate 

offer  on  our  Model  4Q0s 

and  800s  another  60  days 

to  July  31, 1982. 

Now  is  definitely  the 

time  to  consider  SSTV 

for  your  station.  Prices 

will  never  be  lower, 

there's  never  been 

more  SSTV  stations 

I  to  work,  and  there 

i  have  never  been 

1  more  frequencies 

available  for  SSTV. 

The  picture 

telephone  of  the 

future  is  here 

now  for  the 

amateur  radio 

operator.  See  it 

at  your  Robot 

dealer  today. 


ItRf*^' 


SS-^^ 


^*^ 


ep**?^ 


|T*^^ 


f#rti*' 


'"^**»* 


i»rs 


repfO 


5loW 


Scoi* 


ad  as 


it  apP 


eare 


d  if^ 


M3f 


ma^a^ 


jneS- 


6^^ 


lion 


of  or*9^ 


p^54 


ROBOT  RESEARCH  INC. 
7591  Convoy  Ct.,  San  Diego,  CA  92111 

(714)  279-9430 


World  Leaders  in  Slow  Scan  TV,  Phone  Line  TV  and  Image  Processing  Systems. 


could  be  a  problem  with 
any  wire  coming  into  your 
home.  Since  the  EMP 
energy  in  long  overhead 
wires  can  be  extremely 
hazardous,  be  sure  people 
stay  away  from  these  wires 
during  a  time  of  possible  at- 
tack. 

If  you  must  have  some 
radio  equipment  operating, 
dig  out  your  old  tube-type 
equipment  and  use  it. 
Tubes  are  much  less  sensi- 
tive to  high-voltage  shocks 
and  are  more  likely  to  re- 
cover It  is  felt  that  less 
protective  shielding  is  nec- 
essary for  broadcast  receiv- 
ers with  loopstick  antennas 
or  receivers  with  short  an- 
tennas, including  two-meter 
equipment.  Again,  how- 
ever, because  there  are  so 
many  unknowns,  a  wise  op- 
erator would  most  likely 
consider  any  equipment  in 
full  use  to  be  vulnerable. 

More  advanced  EMP  pro- 
tective measures  which 
allow  more  operating  versa- 
tility also  have  been  pub- 
lished under  the  name  of 
the  Defense  Civil  Prepared- 
ness Agency  and  may  be 
obtained  from  the  Federal 
Emergency  Management 
Agency  in  Washington,  DC 
(ask  for  publication  TR-61- 
B).  These  approaches  to  the 
problem  center  around  the 
use  of  gas-gap  arrestors, 
metal -oxide  varistors 
(MOVs),  coaxial  tee  pro- 
tectors for  antenna  cables, 
and  improved  grounding. 
Some  of  their  suggestions 
are  described  here,  so  you 
can  start  on  your  protection 
right  away.  The  approach 
requires  some  expense  and 
would  be  used  if  you  would 
anticipate  operating  during 
a  nuclear  threat. 

Improved  grounding  of  a 
tower  is  extremely  impor- 
tant for  supplying  a  low- 
impedance  path  to  ground 
for  EMP  current.  The  sug- 
gested way  to  accomplish 
this  is  shown  in  Fig,  1.  The 
tower  should  be  connected 
to  the  ground  rods  using  4/0 
wire, 

An  alternative  is  to  install 
20  radials  about  12  to  18 

34     73 Magazine  •  June,  1982 


U] 


m 


1 *^^ 

--* 1 

(  1 

1                 1     f-i    n    F-.                                                           1 

L  U  A  U 

U\ 


tbi 


AC 


tet 


it 


e- 


FIRING'    CrRCUlT 

z 


SCR 


LOAD 


Fig.  10.  Various  EMP  protective  circuits  for  several  typical  circuits. 


inches  below  the  surface, 
using  Vi-inch  copper  tub- 
ing. The  approach  could  get 
very  expensive  at  today's 
copper  prices  but  would 
provide  an  undisputably 
super  ground  for  your  ver- 
tical.  Be  sure  to  connect  the 
outside  of  your  antenna 
feed  cable  shields  to  the 
ground.  Any  control  cables 
going  up  the  tower  should 
be  shielded  in  threaded 
conduit  so  there  is  a  perfect 
conductive  shield  all  along 
the.  .line. 

A    particularly    sensitive 
part  of  an  antenna  circuit  is 


a  balun  at  the  antenna  feed- 
point.  The  best  way  to  pro- 
tect a  balun  is  to  provide 
"zero  reaction  time''  gas- 
gap  arresters  in  parallel 
with  all  balun  capacitors 
and  inductors.  Be  sure  to 
have  the  breakdown  volt- 
age of  the  gas  gap  higher 
than  that  which  you  would 
expect  under  normal  opera- 
tions, even  under  unusually 
high  swr  conditions.  Gaps 
can  have  breakdown  volt- 
ages  ranging  from  220  volts 
to  30  kV  and  have  current 
ratings  ranging  from  3,000 
Amps  on  up. 


The  amount  of  time  that 
any  one  gap  arcs  over  is  a 
factor  to  be  considered 
when  selecting  the  gap. 
Almost  any  gap  can  sustain 
a  large  number  of  low-cur- 
rent arc-overs,  but  only  a 
few  very-large-current  arc- 
overs  during  its  life.  The 
specifications  for  each  gap 
should  be  consulted  if  it  is 
also  to  handle  lightning-ar- 
resting chores  in  addition  to 
EMP  protection.  Also,  most 
gaps  capable  of  EMP  pro- 
tection are  labeled  as  such. 

The  characteristic  ca- 
pacitance of  each  gap  is  of 


MOV  S     10    JOULt 


REMOTE    LOm 


MOV  £    10    JOULE 


CUSTRI&UTlOhl 
PANEL 


fl  •I20VAC  flELAV 

LA 'LIGHTNING  ARRESTOR  ,  POLE  TVPE 

E -  ELECTRIC  OPERATOR 


v.^ 


i>^^ 


j"^ 


c^ 


^ 


MOV  S    40 

JOULE 


Fig,  11.  Full-blown  EMP  protection  for  supplying  power  to  commur)ications  equipment 


WATCH  FOR  OUR  NEW  PRODUCTS 

COMING  SOON 


HAL  Z3M  MH?  DOWN  COVERTERS  fFREQ  RANGE  ^OOQ'TWO  MHi) 
2304  WOOCL  n  KfT  SAStC  UNIT  W/PflEAMP  LESS  HOUSING  &  FITTINGS 
23CM  MODEL  i2  fC(7  >  Aitn  C>r«amp) 
2304  MODEL  «3  KiT  (tt>tn  Higt>  Gam  priafnpj 

liOOCLS  J  A  3  WlTM  COAX  PtTTinGS  iH  A  OiTT  AND  WITH  wfATMeft-PfiOOFEO  D*E 
CAST  HOOSir^GS 

BASC  POWER SUPfLf  t^99S 

POWER  SU  PK  ¥  K*T  FOfT  A  BOVE  W1 TH  CAS£  S24 J6 

FACTORS  WIRED  Jt  TESTED  »tf6 

AMTEMMAS  t  OTHER  ACCESSORIES  AVAILABLE  SCND  FOI^  MOf^E  INFO 

COMPLETE  KITS  CONSISTING  OF  EVERY  ESSENTIAL  PART  NEEDED  TO  MAKE  YOUR 
COLlNTEf^  COMPtETE  HAL-eOOA  7-DlGlT  COUNTER  WITH  FREOUENCV  RANGE  OF 
ZERO  TQ  600  MH/  FEATURES  TWO  INPUTS  ONE  f'Ofi  LOW  FREOUENCV  AND  ONE 
FOP  HIGH  FREQUENCY  AUTDMATlG  2ER0  SUPPRESSION  TrME  BASi  iS  1  0  SEC  OR 
1  sec  GATE  WITH  OPTIONAL  10  SEC  GATE  AVAILABLE  ACCURACY  ±a)T^s 
UTfLIZESlO-WH/ CRYSTAL 5 PPM  COMPLETEKtT  ti29 

HAL  MOA  rOiGiT  COUNTER  (SIMILAR  TO  600Al  WITH  FREQUENCY  RAf^GE  OF  0-300 
MHz  COMPLETE  KIT  f109 

HAL  SOA  8  D>GtT  COUNTER  WITH  FREQUENCV  RANGE  OF  ZERO  TO  50  MH^  OR  BET 
TER  AUTOMATIC  OECIMAL  POINT  ^ERO  SUPPRESSION  UPON  DEMAND  FEATURES 

TWO  INPUTS  ONE  FOR  LOW  FREQUENCY  INPUT  AND  ONE  ON  PANEL  FOR  USE  WITH 
ANY  INTERNALLY  MOUNTED  HALTRONIX  PBE-SCALER  FOf^  WHICH  PBOVtSiONS 
HAVE  ALREADY  BEEN  MADE  TO  SEC  AND  t  SEC  TIME  GATES  ACCURACY  *  001%. 
UTILIZES  10-MHi  CRYSTAL 5  PPM  C0MPLETEKIT$1Q9 

FREE:  MAL78  CLOCK/KIT  PLUS  AN  INLINE  RF  PROBE  WITH  PURCHASE  OF  ANY 
FREOUENCV  COUNTER 

PRBSCALER  KITS 


HAL  300  PRE 
HAL  300  A/PRE 
HAL  €00  PRE 
HALeOOA/PAE 


[Pre^ filled  0-10  t^oard  And  a^l  compCfV&nrsjl  S14.95 

(Same as  at»ove  bul  wttn  preampi  S34.95 

cPre-dTiiJedG-iOboaiTCJaindiill  components^  %2dM 

tsarrie  a^  above  bul  witti  preampy  SJ9.3S 

TOUCH  TONE  DECODER  KIT 

HIGHLY  STA&LE  PECODER  KIT  COMES  WITH  2  SJDED  PLATED  THRU  AWO  SOLD£P 
FLOWED  6  10  PC  BOARD  ?-56?sl  2-74QZ.  AND  ALL  ELECTRONIC  COMPONENTS 
BOARD  MEASURES3.1^^  5-1  ^INCMES  HAS  1 2  UN ES OUT  ONLYS39.95 

NEW-1i  LINE  DELUXE  DECOD€»  %m95 

oe.uxE  1^  eurroN  toucmtone  enc^oer  kit  utiuzing  the  new  icm  ttq&chip 

PROVIDES  eOTH  VI&UAL  AND  AUE>lO  iNDICATJONS*  COWES  WlTM  ITS  OWN  TWO- 
TONE  ANODIZED  ALU«4NUM  CABlNEI  MEASURES  ONLY  ?  H  .3  »vi  *  COMPLETE  WHH 
TOUCH  TONE  PAD  00*RO  CnYSTAL  CHIP  AND  ALL  NECESSAFIY  COMPONENTS  TO 
F^NfSH  TmE  KIT  PRICED  AT  52t  9S 

l^£W  -  ^f  LI  NE  OELU  XE  ENCODER  S39.9S 

HAL  ECU— 16  LINE  0€LU?(E  ENCOOER  INCLUDES  PC  eOARO  ALL  PARTS  1  CASE 

139-96 

HAL  ECD— 13  Uf*E  DELUXE  ENCODER  COMPLETE  WFTH  PC  BOARD  ALL  PARTS  & 

CASE 

S23.SS 

ACCUKIYER  fKO)  THIS  ACCUKEYER  »S  A  REVfSED  VERSION  OF  THE  VERY  POPULAR 
WB4VVF  ACCUSE  YEP  ORtGrNALLY  DESCRmtD  BY  JAMES  GARRETT,  IN  OST 
MAGAZINE  AND  THE  t97&RAOlOAMATEURS  HANDBOOK  51&.95 

ACCUKEYEH -MEMORY  OPTION  KfT  PROVIDES  A  SIMPLE   LOW  COST  METHOD  OF 

ADDING  MEMORY  CAPABILITY  TO  THE  W&4VVF  ACCUKEYER  WHILE  DESIGNED  FOR 
DIRECT  ATTACHMENT  TO  THE  ABOVE  ACCLKEYER  IT  CAN  ALSO  BE  ATTACHEO  TO 
ANY  STANDARD  AGCUKE YE R  BOARD  WJTH  LITTLE  DfFFlCULTY  116.95 

BUY  BOTH  THE  MEMORY  AND  THE  KEYER  AND  SAVE 

COMBINED  PRtCE  ONLY  S32,00 

PREAMPLIFIER 

HAL  PA  19  WID^  BAND  PRE  AMPLfFIER.Z  200  MH?  BANDWIDTH  j  »  IdB  POINTS)  19  dB 

GAIN 

FULLY  ASSEMBLED  AND  TESTED  »a,9& 

HAL-PA-1.4  WIDE  BAND  PHE^MPUFlEft.  10  MH2  TO  1  i  GH/  12dS  GAIN 

FULLY  ASSEMBLED  S1Z9& 

CLOCK  KIT'^HAL  79  FOUR  CMOrr  SPEaM-f7.fi5.  OP 

ERATES  ON  12  VOLT  AC  ^NOT  SUPPLIED}  PRO  VISIONS  FOR  DC 
AND  ALARM  QPERAllON 

e^DIGIT  CLOCK- 12/24  HOUR 

COMPLETE  KIT  CONSISTING  OF  2  PCG-^0  PRE  DftiiLEO^t  OOAROS  T  CLOCKCHtP,6 
FNO  COMM  CATH  READOUTS  U  TRANS  3  CAPS.  9  RESlSTOflS  5  OlOOES.  3  PUSH- 
BinrON  SWITCHES  power  transformer  AND  INSTRUCTIONS  DONT  BE 
FOOLED  BY  PARTIAL  MTS  WHERE  YOU  HAVE  TO  BUY  EVERYTHING  EXTRA 

PRICED  AT  112.95 

CLOCit  CASE  AVAILA&LE  AND  WILL  RT  ANY  ONE  Of  THE  ABOVE  CLOCKS  REGULAR 
PRICE       16J0  OUT  OfVY  U^O  WHEN  BOt>OHT  WITH  CLOOL 

SIXWGfr  ALAftM  CLOCR  KIT  FOR  HOME.  CAMPER  RV  0«  F1EL0OAY  USE 
OPERATES  O**  12  VOLT  AC  OR  DC.  AND  HAS  ITS  OWN  60^ H/  TIME  BASE  ON  THE 
BOARD  COMPLETE  WITH  ALL  £i£CTRON«;  COMPONENTS  AND  TWO  PIECE.  PRE 
DRILLED  PC  BOARDS  BOARD  SIZE  4'  k  3"  COMPLETE  WITH  SPEAKER  ANQ 
SWITCHES  IF  OPERATED  ON  DC  THERE  3S  NOTHING  MORE  TO  BUY' 

PRICED  AT  11 6,95 

'TWELVE- VOLT  AC  LINE  COFID  FOR  THOSE  WHO  WISH  TO  OPERATE  THE  CLOCK 
FROM  1  tavOLT  AC  WHEN  PURCHASED  WITH  CLOCX  KIT  S2.95 

SHIPPING  INFORMATION  ORDERS  OVER  S25  WILL  BE  SHIPPED  POST  P AC  EXCEPT 
ON  (IE MS  WHERE  ADOlTtONAL  CHARGES  ARE  REQUESTED  ON  ORDERS  LESS  THAN 
125  PLEASE  INCLUDE  ADDITIONAL  S2.00  FOR  HANDLING  AND  MAILING  CHARGES. 
SEND  20,  STAMP  FOR  FREE  FLYER  DISTR,BUTOH  FOR 

Alumi  Towftr»AP  Products 
(Wfl  have  ihe  r^aw  Hobby-Blcix  Syslflm) 


V'^^. 


1^31 


HAL     HAMOtO  C    NOWLAHD 
WiZXH 


HalTronix 

P.O.  BOX  1101 

SOUTHGATE,  MICH.  48195 

PHONE  (313)  285-1782 


**^; 


'Xf 


* 


I 


^ 


*^<  t*/ 


The  places  to 
ARCO  Solar " 
Power  Systems  are 
popping  up  everywhere. 

For  some  very  sound  reasons.  Not  all  solar 
electric  systems  are  created  equal.  ARCO 
Solar  products  offer  all  the  features  that  add 
up  to  superior  performance  and  Increased 
value.  Features  like  design,  construction, 
warranty,  accessories  and  service.  Those  who 
know  what  dependable,  stand-alone  power 
can  do  for  their  communications  equipment, 
know  how  important  these  features  are- 

And  now,  there  are  2,500  dealers  across  the 
United  States  and  Canada  offering  ARCO 
Solar  power  systems.  For  the  name  of  the 
dealer  nearest  you,  contact  one  of  our 
regional  distributors: 


^ 


DENVER.  CO 

C  W  Electronic  Sales 
(303)832-1 

LOS  ANGELES.  C  A 

Henry  Radio 
^213^  B20-1234 

DAIXAS.  TX 

Hutton  Companies 
DaKas  560 


NORTH  HOLLYWOOD,  CA 
Wm  Lamb  Company 
(213)980-6248 

LENEXA*  KS 

North  Supply  Company 
(913) 888-9800 

SCOTTSDALE,  AZ 

Photocomm 
(602)  948-6003 


HONOLULU,  HI 
Servco  Pacific  Inc, 
(80B\  041-3644 

WILLITS.CA 

Solar  Electric  Specialtres 

f70'  ^6 

SANTA  3AH3ARA.  CA 

Solar  West  Elec 
(805^963-9667 

CALGARY 
ALBERTA  CANADA 

We-  lineering 

(403)  25: 


•vNVAVy^ 


O  Solar  Inc. 


Subsidiary  of  AttanlJcHi 


ICompanV 


See  LfSto*  Jka¥efti$€rs  Ort  p^ge  tt4 


73  Magazine  •  June,  1982     35 


^•m 


umi 


^ 


£{hJrPll£lffT 
CASE 


t r 


:J 


r 


m 


C^RCUIT 


f/g,  TZ  Sw/tch/ng  diodes  may  be  used  to  protect  very  short 
wires.  Use  1N3653S  and  a  0.1-piF,  500-volt  capacitor. 


considerable  importance  in 
rf  circuits  since  the  inter- 
electrode  capacitance  be- 
tween gap  electrodes  can 
cause  additional  capaci- 
tance to  be  put  into  the  cir- 
cuit along  with  the  gas  gap. 
This  capacitance  can  be  on 
the  order  of  2  to  15  pF  or 
more,  depending  on  the 
type  of  gap.  The  capaci- 
tance can  be  reduced  by 
connecting  two  gaps  in 
series.  If  you  use  that  ap- 
proach, be  sure  to  put  a 
1 -megohm  or  higher  resistor 
(about  1  Watt)  across  each 
gap  to  equalize  the  voltage 
between  gaps  Keep  in 
mind,  too,  that  connecting 
two  gaps  in  series  roughly 
doubles  their  breakdown 
voltage  An  example  of  the 
use  of  gas  gaps  in  an  anten- 
na balun  is  shown  in  Fig.  2. 

At  the  transmitter  or  re- 
ceiver you  may  use  a  gas 
gap  or  tee  protector  as 
shown  in  Fig.  3.  The  diode 
shown  here  is  a  silicon  type. 
While  this  diode  has  a  fast 
reaction  time,  it  may  not  be 
able  to  sustain  the  needed 
current,  and  should  be  pre- 
ceded by  a  gas  gap  at  a 
point  closer  to  the  antenna. 
Fig  4  shows  a  gas  gap  con- 
nected in  a  transmitter  cir- 
cuit 

If  you  want  to  go  first 
class  and  prepare  the  entire 
shack  (Fig,  5X  you  could  be 
in  for  a  very  expensive  proj- 
ect, which  may  not  be  nec- 
essary if  you  can  shut  down 
your  equipment  as  dis- 
cussed above  However,  if 
you  wish  to  take  that  step, 
the  FEMA  recommends 
that  the  shack  should  be 
completelY  encased  in  18-  to 
2Crgauge  galvanized  sheet 
metal!  To  provide  com- 
plete protection,  the  treat- 
ment includes  the  door  and 
ventilation    facilities.    The 

36     73  Magazine  •  JuneJ982 


sheet  metal  should  be  fold- 
ed at  the  seams  and  sol- 
dered, with  a  strip  of  tinned- 
metal  tape  covering  the 
seam. 

Telephone  landlines 
should  be  brought  into  the 
shack  via  50  to  300  feet  of 
conductive  conduit  which 
is  welded  to  the  enclosure 
at  the  point  of  entry.  The 
lines  should  be  terminated 
in  gas  gaps,  metal-oxide 
varistors,  or  both.  Fig.  6 
shows  an  example.  Even 
your  lighting  system  should 
have  MOV  protection  as 
shown  in  Fig.  7\ 

Ac  power  supply  lines 
should  have  MOVs  at  all 
critical  points,  FEMA 
recommends  that  MOV  rat- 
ings should  exceed  the 
stored  inductive  energy  of 
the  preceding  transformer 
and  also  should  exceed  the 
no-load  transformer  cur- 
rent. Typical  varistors  have 
ratings  of  40  joules  (some 
are  in  the  range  of  10  to  200 
joules]  and  should  be  in- 
stalled at  40  joules  per 
phase  of  the  ac  line.  Four 
lO-joule  varistors  connect* 
ed  in  parallel  will  provide 
the  needed  40-jou!e  protec- 
tion. Electrical  distribution 
boxes  and  control  boxes,  of 
course,  should  be  thorough- 
ly shielded  FEMA  recom- 
mends that  doors  and  open- 
ings should  be  fitted  with  rf- 
shielding  gaskets  and  con- 
ductive epoxy. 

Don't  forget  the  ventila- 
tion  system,  where  all 
motor  wires  and  switches 
should  be  thoroughly 
shielded  and  protected 
with  MOVs,  Some  additiorv 
al  circuit  protection  ap- 
proaches may  be  seen  in 
Figs  8  through  12. 

Of  particular  importance 
is  the  emergency  generator 
to  be  used,   All   important 


EMF  Prpt^ction  Equipment  Sources 

Some  EMP  protective  devices  are  not  easily  obtained.  1 
have  found  that  even  a  local  distributor  cannot  always  obtain 
information  about  them.  Following  is  an  updated  list  of 
sources.  Those  with  asterisks  (*)  have  expressed  their  inter- 
est in  selling  the  equipment  by  sending  me  information  when  I 
specjfically  requested  information  about  EMP  protection. 


*C.  P.  Clare  Co. 
3101  West  Pratt  Avenue 
Chicago  I L  60645 

Dale  Electronics,  Inc, 
Box  609 
Columbus  NE  68601 

*  Emerson  and  Cuming,  Inc, 
869  Washington  Street 
Canton  MA  02021 

'  Fischer  Custom 
Communications 
Box  581 
Manhattan  Beach  CA  90266 

General  Electric  Company 
Electronic  Comp.  Sales 
Operation 
1  River  Road 
Schenectady  NY  12306 

General  Semiconductor 

Industries 

2001  W.  Tenth  Place 

Tempe  AZ  85281 

•Joslyn  Electronics  Systems 
6868  Cortona  Drive 
Goleta  CA  93017 

Lectro  Magnetics 
6056  W.  Jefferson  Blvd. 
Los  Angeles  CA  90016 

E.  A.  Lindgren  and 

Associates 

4515  N.  Ravenswood  Avenue 

Chicago  I L  60640 

Ray  Proof  Corporation 
Keeler  Avenue 
NorwalkCT  06856 

•Shielding  Technology,  Inc. 
(Division  of  Chomerics) 
970  New  Durham  Road 
Edfson  NJ  08816 

Technical  Wire  Products 
129  Dermody  Street 
Gran  ford  NJ  07016 

*Technit  {EMI  Shielding 
Division) 

320  North  Nopal  Street 
Santa  Barbara  CA  931 03 

Topatron,  Inc. 

Box  967 

Costa  Mesa  CA  92827 

Tf  anstector  Systems 
532  Monterey  Pass  Road 
Monterey  Park  CA  91754 


Gas  gaps  and  other 
transient  protectors 

Gas  gaps  and  other 
transient  protectors 

Conductive  adhesives 
Rf  gaskets 
Rf  shielding 

Coaxial  tee  protectors 


Metal-oxide  vadstors 
(MOVs) 


Gas  gaps  and  other 
transient  protectors 


Gas  gaps  and  other 
transient  suppressors 

Rf  shields 


Rf  shields 


Rf  shields 


Conductive  adhesives 


Rf  gaskets  and  shielding 


Rf  gaskets  and  shielding 


Rf  gaskets  and  shielding 


Transient  suppressors 


wiring  should  have  MOV 
protection  Shielded  con* 
ductors  should  be  used  for 
best  results  and  the  shields 
should  be  grounded,  ■ 


Acknowledgement 
The  basis  for  Figs.  1  through  6 
and  8  through  11  Is  EMP  Pro* 
tective  Measures,  Defense  Civil 
Preparedness  Agency,  1976. 


Introducing  the  Neiy  Loiv  Cosf  Spectrum 
SCR  77  Repeaters— 2M,  220  &  440  MHz! 


SfccTRim  commtmcATiOHs 

scan  FM  REPEATEfl 


'VOC  D'EI'll  ^^A^M^WIT 


COM  Dt«4ai.a 


AC  h.*tim 


AC    UDMiflli 


'^aejhii.   wie. 


15  or  30  Wt.  Xmtrs. 


inctudes:  •0.35mV  Rcvr.  8  Pole  \F  RMer 

•  Crystals -high  stability  ,0005% 

•  Local  Mic 

•  Your  Call  programmed  into  IE>ar 

•  Provision  for  Auto-Switohover  to  Btry.  Pwr. 

•  Built-in  115/230V  AC  Supply;  basic  Panel  Con- 
trols,  Spkr.,  LED  Indicators 

If  you're  looking  for  a  new  Repeater,  but  you  real- 
ly don't  need  (or  can't  afford)  all  the  features  and 
options  on  our  world  fannous,  'super  deluxe' 
SCR1000/4000,  then  our  new  economy  line  of 
SCR77  Repeaters  is  ideal  for  you? 

These  new  Repeaters  maintain  the  quality  of  design,  com^ 
ponents   and   construction   which   made   Spectrum   gear 
famous.  However,  all  of  the  "bells  &  whistles"  which  you  may 
not  need  or  want  have  been  eliminated— af  a  targe  cost  sav- 
(figs  to  you!  The  SCR77  is  a  real  "workhorse  '  basic  machine 
designed  for  those  who  want  excellent,  super-reliable  perfor- 
mance year  after  yeaf^  but  no  friffs}  ('PL\  12  Pole  IF  Filter* 
Front  End  Preselector,  and  a  30Wt,  Transmitter  are  the  only 
■*built-in"  options  available;  but  Autopatch,  Remote  Con- 
trol, and  other  equipment  can  be  connected  via  the  rear 
panel  jack.) 


^  c<Mi^dete  lute 
<U  dufticKCn^..  €uiteHH^i^,  caicmet^^, 
caMe ,  etc,,  U  eiha  cu/t^cUiojiie. 


Of  course,  if  you  do  want  a  full  featured/super  delujte 
repeater  with  higher  power  and  a  full  list  of  available  ^built-in' 
options,   then    you   want   our   SCR1CXK)  or  4000  "Dream 
Machine".  These  units  will  continue  to  be  available  for  those 
who  want  'The  Ultimate  in  Repeaters', 
SCR77  Pricing  (15Wt.)r  2M  or  220MHz.  $995.00  Amateur  Net. 
440MH2,  $1150.00.  For  no  'plug-In'  ID  board  (Export),  deduct 
$40.00,  ObW  or  write  today  for  a  data  sheet,  or  to  place  your 
order!  Sold  Factory  Direct  or  through  Export  Sales  Reps  only. 


10M    FM    RX/TX    Boards,    Repeaters    &    Remote   Bases    NOW 
AVAILABLE!  Calt  or  Write  for  Full  Info. 


^66 


SPEC  TRUM  COIUIUVIMICA  TIONS 


11055  W.  Germantown  Pk,S6«  Norristown,  PA  19401  •(215)  631-1710  •  Telex:  846-211 

.See usi  =r  Ad^^rose,,  pn pag^  ) ,4  73 Magazine  •  June.  1 982    37 


i 


w 


Food  for  thought. 

Our  new  Universal  Tone  Enccxier  lends  it's  versatility  to 
all  tastes.  The  menu  includes  all  CTCSS,  as  well  as  Burst 
Tones,  Touch  Tones,  and  Test  Tones.  No  counter  or  test 
equipment  required  to  set  frequency-just  dial  it  in.  While 
traveling,  use  it  on  your  Amateur  transceiver  to  access  tone 
operated  systems,  or  in  your  service  van  to  check  out  your 
customers  repeaters;  also,  as  a  piece  of  test  equipment  to 
modulate  your  Service  Monitor 
or  signal  generator.  It  can 
even  operate  off  an 
internal  nine  volt 
battery,  and  is  available 
for  one  day  delivery, 
backed  by  our  one 
year  warranty. 

•  All  tones  in  Group  A  and  Group  B  are  included. 

•  Output  level  flat  to  within  1.5db  over  entire  range  selected. 

•  Separate  level  adjust  pots  and  output  connections  for  each  tone 
Group. 

•  Immune  to  RF 

•  Powered  by  6'30vdc,  unregulated  at  8  ma, 

•  Low  impedance,  low  distortion,  adjustable  sinewave  output,  5v 
peak-to-peak, 

•  Instant  stait-up, 

•  Off  position  for  no  tone  output. 

•  Reverse  polarity  protection  buill-jn. 

Group  A 


67.0  XZ 

91.5  ZZ 

1)8.8  26 

156.7  5  A 

71.9  XA 

94.8  ZA 

123.0  3Z 

162.2  SB 

74.4  WA 

97.4  ZB 

127.a  3A 

167.9  62 

77.0  XB 

100.0  IZ 

131.8  3B 

173.8  6A 

79.7  SP 

103.5  lA 

136.5  4Z 

179.9  6B 

82.5  YZ 

107.2  IB 

141.3  4A 

186.2  7Z 

85.4  YA 

110.9  2Z 

146.2  48 

192.8  7A 

88.5  YB 

1 14.8  2A 

151.4  5Z 

203.5  .Ml 

•  Frequency  accuracy,  ±  J  Hz  maximuni  -  4(f  C  to  +  85°C 

•  Frequencies  to  250  Hz  available  on  special  order 

•  Continuous  tone 

Group  B 


TEST-TONES: 

TOUCH-TONES: 

BURST  TONES: 

600 

697     1209 

1600     1850    2150    2400 

1000 

770     1336 

1650     1900     2200    2450 

1500 

852     1477 

1700     1950     2250    2500 

2175 

941     1633 

1750    2000    2300    2550 

2805 

1800    2100    2350 

Frequency  accuracy,  ±  1  Hz  maximum  -  40X  to  +  85^C 
Tone  length  approximately  300  ms.  May  be  lengthened, 
shortened  or  eliminated  by  changing  value  of  resistor 


Wired  and  tested:  $79.95 


COMMUMCAmm  SPECIAUSTS 

426  West  Taft  Avenue,  Orange,  California  92667 
(800)  854-0547/  Califomia:  (714)  998^3021 


»^is 


Bob  Chormiey  Kmv 
5Sm  /ones  PL  NW 
Albuquerque  NM  37120 


9 

A  Split  Personality 
fortheKDKFM2015R 


A  simple  modification  to 
your  KDK  FM2015R 
will  give  you  the  capability 
to  receive  on  one  frequency 
Stored  in  memory  and 
transmit  on  another  This 
modification  gives  you  the 
newer  FM2016'5  capability 
to  operate  with  nonstan- 
dard offsets  without  an 
additional  crystal.  It  re- 
quires two  diodes,  a  piece 
of  wire,  no  holes,  and  less 
than  half  an  hour.  The  rig 
may  easily  be  returned  to 
original  configuration 
whenever  desired. 

A  different  form  of  this 
mod  was  described  in  some 
Amateur^Wholesale  Elec- 
tronics   notes    concerning 


MARS-CAP  modification, 
so  I  can't  take  credit  for  the 
original  idea.  Til  first  de- 
scribe how  the  modifica- 
tion functions,  then  go 
through  a  step-by-step  mod- 
ification procedure. 

The  resulting  frontpanel 
performance  is  as  follows; 
Select  Mode  A.  With  the 
memory-select  switch  at 
OFF,  you  have  simplex  op- 
eration on  the  dialed-in  and 
displayed  frequency.  Se- 
lecting memory  position  2 
will  allow  you  to  receive  on 
the  frequency  stored  there, 
which  is  displayed  as  usual. 
When  you  transmit,  how- 
ever, the  memory  internally 
shifts    to    the    frequency 


stored  in  channel  1 .  This  fre- 
quency is  displayed  while 
transmitting,  and  the  dis- 
play shifts  back  to  your 
channel  2  receive  frequen- 
cy when  the  mic  button  is 
released. 

Channels  3  and  4  work 
the  same,  with  channel  4 
functioning  as  the  receive 
channel,  switching  auto- 
matically to  the  frequency 
stored  in  channel  3  on 
transmit.  If  either  channel  1 
or  3  is  selected,  simplex  op- 
eration on  those  channels  is 
the  result-  All  that  for  only 
two  diodes! 

Here's  how  it  works:  On 
transmit  in  the  unmodified 
rig,  a  transmit  oscillator  is 


diode-switched  on  by  +9 
volts  from  the  front  panel 
MODE  switch.  We  locate 
the  wire  which  runs  to  the 
"A"  oscillator  position 
(which  has  no  crystal  in- 
stalled) and  run  switching 
diodes  from  there  to  two 
places. 

The  first  diode  goes  to 
the  simplex  crystal  position, 
activating  it  on  transmit 
The  second  diode  goes  to 
one  of  the  two  memory- 
select  lines  (A(3  and  A1) 
which  select  the  memory 
channel.  In  an  unmodified 
rig,  the  same  memory  fre- 
quency is  used  on  both  re- 
ceive and  transmit-  If  you 
trace    out    the    schematic, 


Photo  A. 
40     73  Magazine  *  June,  1982 


Photo  S, 


you  will  see  that  in  the 
original  configuration  when 
memory  position  2  is  front- 
panel  selected,  -h9  volts  is 
routed  through  this  mem- 
ory switch  to  memory- 
select  line  A1 .  Or,  if  memory 
position  3  is  selected,  A0 
is  taken  high.  Memory  posi- 
tion 1  requires  both  AQ 
and  A1  to  be  high,  and  posi- 
tion 4  requires  neither  to 
be  high.  If  we  modify  things 
to  make  A(/l  high  on  trans- 
mit only,  then  memory  po- 
sition 4  on  receive  becomes 
3  on  transmit,  and  2  be- 
comes 1  on  transmit  This 
switching  is  done  with 
diodes  to  avoid  interfering 
with  other  functions. 

To  perform  this  mod, 
remove  both  top  and  bot- 
tom covers  from  the  rig. 
With  the  rig  right  side  up, 
locate  the  three  crystals  on 
the  transmitter  board.  (See 
Photo  A  and  ignore  the 
fourth  crystal  which  I  in- 
stalled for  another  offsetj 
A    terminal    post    corre- 


sponds to  each  crystal  posi- 
tion. A  yellow  wire  is  con- 
nected to  the  first  unused 
crystal  position,  which  is 
the  fourth  one  in  from  the 
outside  edge  of  the  board. 
The  pencil  in  the  photo  is 
touching  this  terminal. 

Note  that  this  wire  is  con- 
nected to  the  "A"  MODE 
switch    position    and    is 

switched  to  +9  volts  on 
transmit.  Remove  the  wire 
from  this  terminal  post.  You 
will  run  two  diodes  from 
this  yellow  wire,  and  you 
will  need  to  mechanically 
secure  this  junction  some- 
how. I  slipped  a  piece  of 
spaghetti  over  the  terminal 
and  tied  the  wire/diodes  to 
it.  However  you  do  it,  the 
first  diode  is  soldered  from 
the  yellow  wire  to  the  first 
crystal  position's  terminal 
(the  one  with  the  brown 
wire),  The  diode  points  at 
the  brown  wire  (cathode  to 
brown  wire)  and  will  acti- 
vate the  simplex  oscillator 
on  transmit 


The  second  diode's 
anode  is  also  soldered  to 
the  yellow  wire.  At  this 
point,  the  yellow  wire 
should  form  a  "flying  tie 
point"  with  the  two  diode 
anodes.  Attach  the  cathode 
(point)  of  the  second  diode 
to  a  length  of  hookup  wire. 
Route  the  free  end  of  the 
wire  toward  the  front  of  the 
radio  to  the  control  board 
and  connect  it  to  the  A(J 
pad.  This  control  board  is 
accessible  from  the  bottom 
of  the  radio  and  is  located 
near  the  front  panel.  See 
Photo  B  The  pencil  points 
to  pad  AO.  The  wire  at- 
tached to  the  pad  is  the  one 
I  added  for  this  mod. 

The  AQ  and  A1  pads  are 
designated  as  such  on  the 
component  side  of  the 
board  and  have  white/ 
brown  (A0)  and  white/ 
black  (A1)  wires  attached  to 
them  on  the  component 
side-  This  completes  the 
modification. 


Verify  that  the  rig  wt 
operate  now  as  described 
earlier.  This  mod  is  totally 
"safe"  in  that  the  rig  can't 
be  harmed  by  incorrect 
front-panel  switch  settings. 
MODE  switch  positions  B 
and  C  are  still  available  for 
nonstandard  offset  crystals 
if  desired  The  rig's  opera- 
tion in  all  other  respects  is 
unaffected. 

The  only  problem  I  en- 
countered was  that  the 
simplex  transmit  oscillator 
didn't  function  until  the 
yellow  wire  and  diodes 
were  isolated  from  the 
fourth  oscillator  terminal  as 
1  have  described.  If  you  feel 
like  experimenting,  leave 
the  yellow  wire  connected 
and  solder  the  diodes  di- 
rectly to  the  terminal  If  it 
works  (if  the  transmitter 
puts  out  power),  then  you 
win.  If  not,  then  isolate  the 
wire/diodes  as  1  described. 
Please  send  an  5ASE  if  you 
have  any  questions.  ■ 


IRON  POWDER  and  FERRITE  PRODUCTS 


^33* 


Fast,  Reliabte  Service  Since  196J 


Small  Orders  Welcome 


Free  'Tech-Data'  Flyer 


Toroidal  Cores,  Shielding  Beads,  Shielded  Coil  Forms 
Ferrite  Rods,  Pot  Cores,  Baluns,  Etc. 

12033  OTSEGO  STREET,  NORTH  HOLLYWOOD,  CALIFORNIA  91607 


we^reRolin  . 

IN  CRYSTALSr 

2  Meter  Crystals  —  $3.95  each 
(10  or  More  —  S3.50  each) 

Quick  Delivery 


We  Stock  Crystals  For: 

Clcgg  Drake  Icom 

Kenwood  Midland  Regency 

Standard  Wilson  Yaesu 

Lafayeite  Tempo  VHF  Eng 


Rollti  Distributors 

P*0*  Box  436  Department  7 
Dunellen,  N.J.  08612 

201-469  1219 


(Custom  Crystal  Orders  Accepted.)     Precision  Cut  Land  Mobiles  Available 


SHEET  METAL  WORKERS 

RiOK    r 

MULTI- 
PURPOSE 

•  SHEAR 

•  PRESS  BRAKE 

•  SLIP  ROLL 
ALL  FUNCTIONS-- 
OPERATE 

simultaneously' 

THE  COMPLETE  RftD  SHOP 

•  24"  wide  •  257  Itjs, 

•  20"  ga.  capacity  mild  steel  or 

•  ,050/,060"  V?  hard  aluminum 
9  punches,  special  dies,  stand 

available  as  accessories 


bHEAR-NOTCHER 


NO  DISTORTION  •  NO  BURRS 

•  continuous  shearing    ^^050 

•  corner  notching  9o8 

•  tab  notching  piu^  $4.00 

•  nibtJiJng  shipping 

Send  for  your  FREE  Itlefature  and 
SHEET  METALWORKER  BULLETIN 

PACIFIC  ONE  CORPORATION 

410  W.  Pacific  Coast  Hwy.  Suits  K  206 
Newport  Beach.  CA  92663  (71 4j  645-6962 


i' 


See  Ltst  oi  Attv^ftt^ers  on  fjage  f  td 


73 Magazine  •  June,  1 982     41 


Building  for  Beginners 

happiness  is  a  hot  soldering  iron 


PauiM.  Danza^Nlii 
2  Dawn  Road 
Norwsfk  €106851 

(have  authored  several 
short  construction  ar- 
ticles in  the  past  year  or  two 
and  each  time  their  publica- 
tion was  followed  by  a 
flurry  of  letters  asking  for 
help  in  selecting  parts  and 
building  the  circuit  This 
mail  suggests  that  a  number 
of  hams  without  very  much 
electronic  construction  ex- 
perience would  still  like  to 
home-brew  their  own. 

For  this  reason,  I  have 
put  together  a  set  of  sugges- 
tions and  hints  which  an- 


«200fl 


9Q20n 


4-10%] 


swer  the  most  commonly 
asked  questions.  The  next 
time  you  see  a  circuit  or 
gadget  described  in  73  or 
elsewhere,  don't  be  shy — 
go  ahead  and  build  it! 
You'll  be  delighted  with 
the  results. 

Where  Can  I  Get  the  Parts? 

The  most  critical  part  of 
building  anything  these 
days  is  obtaining  the  parts. 
Years  ago,  the  corner  radio 
store  carried  almost  any- 
thing you  wanted,  and  if 
you  lived  in  a  metropolitan 
area  you  could  always  go 
down  to  "radio  row"  where 
there  was  a  cluster  of  such 


sioan 


iO^aooa    ^^— 


95ooa 
9^50  a 


IO,OOOJi 


to. 5000 


M^QODA 


i2.oooa 


Fig.  1.  Standard  resistor  values.  Those  in  boxes  are  standard 
commercially-available  resistors. 

42     73Magazme  •  J  one  J  982 


stores.  Today,  your  best  bet 
is  either  the  mail<jrder  ads 
in  the  back  of  this  magazine 
or  the  Radio  Shack  chain  of 
stores.  Radio  Shack  carries 
a  line  of  the  most  common- 
ly used  parts  and  has 
stores  scattered  throughout 
the  country. 

The  mail-order  advertis- 
ers in  the  back  of  this  maga- 
zine usually  list  common 
parts  and  prices  for  immedi- 
ate order-  Most  of  them  of- 
fer catalogs,  either  free  or 
for  the  postage,  and  are 
geared  up  to  ship  your 
order  within  a  day  or  two 
after  receipt.  They  have 
been  advertising  for  many 


PtNl 


IttOTCH 


mut 


LARSE 
NOTCH 


t^m  i 


9MALt 

HOTCrt 


Fig.  2,  IC  pin  iocations. 


years,  and  the  acceptance 

of  their  ads  by  73  on  a 
continuing  basis  shows 
that  they  deal  fairly  with 
their  customers. 

Try  to  take  advantage  of 
the  "two-for"  offers.  Even  if 
you  have  no  immediate  use 
for  the  extra  parts,  keep 
them  around  and  you  will 
probably  find  a  use  for 
them  in  some  future  con- 
struction project 

Resistors  and  Capacitors 

Unless  the  magazine  arti- 
cle  states  otherwise,  use 
half-Watt  resistors.  They 
are  most  commonly  avail- 
able, and  if  a  higher  watt- 
age is  needed,  the  arti- 
cle  will  say  so.  If  you  are 
squeezed  for  space,  quar- 
ter-Watt units  can  be 
used  — again,  as  long  as 
the  article  says  nothing  to 
the  contrary. 

Don't  worry  about  the 
seemingly  oddball  values 
specified.  Resistors  general- 
ly come  with  20%,  10%, 
and  5%  tolerances.  Using 
10k  Ohms  as  an  example, 
Fig.  1  shows  the  relation- 
ship between  the  standard 
values  and  these  toleranc- 
es. Today,  most  people  use 
10%  values  primarily  be- 
cause they  are  the  most 
commonly  available,  [f  the 


RTTY/C\A/  > 

kFon  theTRS-SO 


'  A  Tractemark  of  ihe  Tandy  Corp 


ROM-116 

Now  includes: 

•TEXT  EDITING 

•  RTTY  PICTURES 

•SAVE  TEXT  TO  DISK  Detailed  brochure  available  on  request. 


Featuring: 


1200  BAUD  OPERATION.  Not  limited  to  110  baud 
because  o1  timing  loops  60,  66^  75  &  100 

W.P  M   Plus  110.  150,300,  600  &  1200  baud 
Operations  possible. 

FLEXIBILITY  OF  OPERATION^  Instantly  change; 
Baud  Rates:  Program  Mode  (ASCH/8aydot); 
Program  Sratus. 

SPLIT  SCREEK  VIDEO.  Transmit  &  receive  data 
displayed  separately. 

REALTIME.  Aylomatic  CW/IO  without  user  in- 
tervention. Automatrcally  .    . 
updates  at  end  of  month 


Ot:her  f eatxjres 
rTcJude- 

•  Two  Serial  Ports, 

•  Fourteen  Suffers 

•  Automatic  CW/ID 

•  Transmit  CoDtrol 

•  Selective  Call  Feature 

•  Error  Correction  &  Editing 

•  Word  Wraping 

•  Easy  to  Interface 

•  30  Day  Unconditional 
Guarantee 

•  Hardware  Becjutrements: 
TRS-aOModellorlll  16K 
EXTERNAL  TERMINAL  UNIT 
REQUIRED 


or  year. 

nicroPfoducts 

606  State  Street,  P.O.  Sox  892-R  •  Marysvitle.  WA  98270  •  (206)  659-4279 


r 


,  THE  LAST 
READERS 

THE  N  EW 


WORD 


MBA-RO 

FEATURES: 

•  32  CHARACTERS  FOR  EASY  HIGI 
OF  MORSE 

•  ASCII  and  BAUDOT  RTTY 

•  NO  RECEIVER  MODIFICATION  NECESSARY 

•  INSTANT  SPEED  TRACKING  FOR  MORSE  CODE 
OVER  WIDE  SPEED  RANGE  FROM  2  TO  99  WPM 

•  OPERATES  FROM  12  VD.C. 

For  AEA  Readers  or  other   1 
AEA  Products,  call  or  visft: 


AEA 

Brings  you  the 
Breakthrought 


Ust  ot  Advertisers  on  psge  1f4 


Britt's  2-Way  Radio 
Sales  &  Service 

2508  Atlanta  Street 
Smyrna,  Ga.  30080 
(404)432-8006  ^<« 


PERFECT  7 

ANTENNA  ♦ 

FOR 

10-15-20  METERS     I 

VERTICAL 

OMNI-GAIN 

HALFWAVE 
END  FED 

NO  RADIALS 

NO  REFLECTED  I 

POWER  I 

BROADBAND  I 

FIXED  OR  I 

PORTABLE  I 

REMOTE  TUNING        I 
2  KW  PEP  I 

UPS  SHIPPABLE  I 


[I  i   may  be  the  perfect 
antenna  for  condom iniii ins, 
apartments,  small  lots  or  any 
limited  space  situatioii.  It  is  a 
jjpeat  antenna  for  hams  who 
are  concern ed  about  neat 
appearance  and  maximum 
performance. 

U5*s  self  supporting*  radiator 
IS  onlv  2 1ft '6.4m  high  v  Hi 
.304m  wide  at  the  base, 
Ajisemblv  is  quick  and  easv 
for  portable,  marine,  field  dav; 
DX'pcditions,  or  fixed 
m^t<iUation*i-    It  is  complete 
vdth  remote  tuner. 

AV  Ail.\BLE  THROLC.H 
DKALtRS  WORLDWIDE 


I 


!• 


COF^PORATION 

THE  ANTENNA  COMPANY 

ftO.  Box  4680 

Manc*^estef.  NH  03108  USA 
TE£X953050  ^™ 


73  Magazine  *  June,  1982     43 


article  does  not  say  any- 
thing else,  you  might  stick  to 
10%.  You  can  always  use  a 
resistor  with  a  better 
tolerance  (10%  instead  of 
20%,  or  5%  instead  of 
10%)  If  you  need  5%  and 
can  find  only  10%.  buy  a 
handful  of  10%  resistors 
and  check  them  with  an 
ohm  meter  to  select  one  that 
falls  within  ±5%  of  the 
value  required. 

Capacitors  have  both  a 

value  and  a  voltage  rating. 
You  can  always  use  a  cap 
that  has  a  voltage  rating 
higher  than  the  amount 
needed.  For  most  capaci- 
tors, you  must  stick  to  the 
value  needed  but  you  can 
always  use  the  farger-than* 
specified  electrolytic  cap 
when  it  is  used  for  bypass- 
ing or  filtering  a  power  sup- 
ply voltage.  Just  be  careful 
to  wire  it  in  with  the  polari- 
ty shown  in  the  schematic. 

Transistors  and  FETs 

Generally,  you  will  have 
to  stick  to  the  type 
specified  in  the  article.  Sub- 
stitutes can  be  used  and 
you  can  pick  a  substitute  by 
looking  at  the  substitution 
guide  printed  by  a  number 
of  suppliers  and  distribu- 
tors. Radio  Shack,  GE,  and 
Motorola   all   have   hobby 


Piiii 


lines  of  transistors  and  sub- 
stitution guides  where  you 
can  look  up  the  device  you 
want;  the  guide  will  give 
you  their  substitute  num- 
ber When  you  do  substi- 
tute, be  careful  of  the  con- 
nections. Often  a  substitute 
will  be  very  close  to  the 
ofigmal  part  electrically 
but  will  have  a  different 
mechanical  package  and/or 
lead  arrangement. 

Integrated  Circuits 

Let's  assume  that  the  cir- 
cuit you  are  building  uses  a 
very  common  amplifier 
known  as  the  741  There  are 
perhaps  twenty  versions  of 
this  amplifier,  with  twenty 
different  part  numbers, 
Each  of  the  part  numbers 
includes  the  digits  741 ,  with 
the  rest  of  the  digits  telling 
you  the  temperature  range 
and  mechanical  package. 
For  most  uses  we  don't  have 
to  be  concerned  about  the 
temperature  range,  but  the 
pin  numbers  for  connecting 
to  the  amplifier  are  very 
much  of  interest  Compare 
the  pin  numbers  of  the 
amplifier  as  shown  in  the 
schematic  with  the  pin 
numbers  of  the  actual  part 
you  buy. 

Occasionally,  the  article 
will  specify  an  amplifier 
such  as  the  741  and  show  it 
as  a  single  amplifier  in  an 
8-pin  package.  You  might 
be  able  to  obtain  only  a 
dual  741  or  two  741  amplifi- 
ers in  a  14-pin  package.  This 
is  perfectly  OK;  just  ignore 
the  second  amplifier. 

Integrated  circuits  are 
available  most  commonly 


pi»  t 


PltlNrED  CIRCUIT  BDANO 


^COPPER  LAND 


fig,  3,  Pin  1  transposition. 

44     73  Magazine  •  June,  1982 


in  "in-line"  packages  having 
8,  14,  or  16  pins.  A  round 
dot  usually  marks  pin  1. 
Sometimes  a  notch  tells 
you  where  pin  1  is,  and  oc- 
casionally you  have  to  cope 
with  a  dot  and  two  notches. 
As  Fig  2  shows,  the  dot 
takes  precedence  over  the 
notch,  and  if  there  is  a 
notch  at  both  ends  of  the 
package,  the  larger  notch 
tells  you  where  pin  1  is. 

Unlike  tubes  or  transis- 
tors, the  manufacturer's 
data  sheets  usually  picture 
integrated  circuits  from  the 
top.  Therefore,  when  you 
are  wiring  them  from  the 
underside,  remember  that 
pin  1  is  now  on  the  other 
side  of  the  package  as  seen 
from  the  bottom  of  the  cir- 
cuit board  (Fig.  3). 

Diodes 

Power-supply-type  di- 
odes have  both  a  current 
rating  and  a  voltage  rating. 
You  can  substitute  any  di- 
ode which  has  a  rating 
equal  to  or  greater  than  the 
original  numbers.  Small  sig- 
nal diodes  used  as  switches 
usually  can  be  substituted 
for  at  will.  Most  ham  cir- 
cuits use  a  maximum  of  12 
volts  (sometimes  labeled 
13.6  volts  if  the  equipment 
is  for  mobile  use).  There- 
fore, if  the  circuit  calls  for  a 
small  signal  silicon  diode, 
almost  any  other  silicon 
diode  will  do.  Fig.  4  shows 
the  most  common  markings 
of  the  diode  package. 


*4 

f 


•«. 


CI 


^^ 


Zener  diodes,  used  in 
voltage  regulators,  have 
both  a  voltage  rating  and  a 
power  rating.  You  must  use 
the  voltage  rating  called 
for,  but  you  can  always  use 
a  higher-power-rated  diode. 

Power  Supply  Connections 

Fig.    5    shows    a    simple 

2-transistor  amplifier.  With 
today's  solid-state  circuits, 
usually  only  one  power-sup- 
ply  voltage  is  used  and,  as 
shown  in  the  figure,  you 
simply  tie  the  identically- 
marked  points  together  and 
connect  them  to  the  volt- 
age required.  If  the  sche- 
matic does  not  show  differ- 
ently, the  power-supply 
return  lead  (in  this  case 
the  minus  9-volt  lead)  is 
tied  back  to  all  of  the 
ground  terminals. 

}acks 

Here  you  can  substitute 
at  will.  ]ust  remember  that 
the  most  commonly  used 
jacks  have  one  side  ex- 
posed and  will  connect  to 
the  chassis  (ground)  if  they 
are  not  insulated  by  wash- 


w 


SCHEMATIC 
SYMBOL 


BAND. 


<_K> 


TTPICAL 
COMMEHCmU-T 
MARKED 
DIQO£S 


Fig.  4.   Typical  diode  mark- 
ings. 


m 


THESE  TWO  CmCUJTS  ARE   IDENTICAL 


CI 


R2 


ft3 


€ 


01 


© 


02 


:;R4 


-•*9 


-•-» 


?ig.  5,  Power-suppty  connections. 


M^    ENGINEERING'S 

VHF  H.T.  CONVERTERS 


DOUBLE  BAND    HC-V,  HC-U2 


•  SINGLE  BAND  HC-V220 


•STANDARD  BNC 
CONNECTORS 

•HC-V 

154-158 
159  -163 


HC-U2 

460-464 
480-484 

HC-V220 

221  -  225 


•  BI-LATERAL  PROTECTION    AGAINST 
ACCIDENTAL   TRANSMISSON 
FOR    UP  TO     5  WATTS 

•  USES  SINGLE 
AAA  CELL 


A 


■/■ 


LOW    LOSS 
COUPLING   TO 
ANTENNA 


Hi 


.** 


OFF    RETURNS 
TO   NORMAL 
TRANSCEIVER 
OPERATION 

SIZE'  approx. 
2x1.5x1.5 

weight: 
3.9   ozs. 


HC-U2 

$72.45 


M -SQUARED 
ENGFNEERING,  INC. 

1446  LANSING  AVE. 
SAN  JOSE.CA.  95118 
14081266-9214  ^^^ 


$4f'45 


HC-V220 

$62.45 


DEALERS 
WELCOME 


Shipping    Included 

CaUf.  residents  add 
6.5%  sales  tax 


SATELLITE  SYSTEM  HEADQUARTERS 
Don't  wait.  Get  Your  TVRO  System  TODAY! 


Recefvers  featuring 
the  DEXCEL  and 
Automation  Tech- 
niques units 

Modulators 

Complete  System 
ready  to  install  from 
$2850 

Gail  today  for  more 
information 


CHAPARRAL 

^'Super  Feed" 
feed  horn 

$85.00 


DEXCEL 

120  low  noise 
amplifiers 

$495.00 


SATELLITE  ANTENNAS 
MDS  POWER  SUPPLIES 

$35,00 


1900  to  2500  MHz  Microwave  Downconverlers 


I  ■  P  V  4 


$28.50 


Kit 

r^  W  WW    I     I      I    iJ   I   ^U^    4#*pKH*HHB 

ALSO  AVAILABLE 

Commercial  M.D.S.  System $169.95 

SLOTTED  ARRAY  ANTENNA  ....  $28.50 


.^404 


PB  RADIO 
SERVICE 

t950  E.  PARK  ROW  •  ARLINGTON,  TX  76010 
CALL  ORDEn  DEPT.  TOLL  FREE  

(800)  433-5169 

FOR  INFORMATION  CALL 

(817)460-7071 


FT101    TS520  TS820 
FILTER  CASCADING 


Probably  the  most  popular  units  ever  pro- 
duced,  these  solidly  buitt  transceivers  were 
built  to  LAST.  If  you  can  live  wit  houtgadgetry^ 
why  replace  your  reliable  time-tested  rig 
with  a  costly  new  model?  Especially  since 
you  can  easily  make  your  receiver  equal  in 
selectivity  and  ultimate  rejection  to  any  now 
on  the  market  with  an  inexpensive 
Fox-Tango  Filter  Cascading  Kit! 
CONSIDER  THESE  FEATURES 

•  Easy  installation  -  30  minute  average, 

•  No  drilling,  switching,  alignmenl 

•  Results  of  16  poles  of  filtering: 

Filter  Shape  Factor  as  high  as  1 .19. 
Ultimate  Rejection  better  than  lOOdB. 
Works  wonders  on  SSB;  improves  CW. 

•  Compensates  for  Filter  Insertion  loss. 

•  Complete  instructions,  clear  diagrams. 

•  No  RX  audio  impairment,  TX  unaffected. 

•  Fits  all  models  of  Series  -  any  letter. 

•  10%  off  if  any  four  are  ordered  at  once. 
TS520  Series  Order  Kit  No.  520K. ....  $70 
TS820  Series:  Order  Kit  No.  820K . . .  .$70 
FTI 01  Series  (not  ZD):  Order  Kit  No.  4K . . .  «75 
FT1 01 2D  Series:  Order  Kit  No.  4K-ZD  ...  $75 
Prices  include  stiipping  to  U.S.  &  Canada; 

Overseas  Air  $5,    Florida  Sates  Tax:  4% 
At!  kits  include  a  genuine  8-pole  top-quality 
FT  Filter,  improved  cascading/mini-amp  cir- 
cuit board,  afl  needed  parts,  cables,  and 
detailed  instructions. 

In  add  it  Ion  to  the  above ,  Fox-Ta  n  go  feat  u  res 
cascading  kits  for  the  Fr^901/2  ($65).  FR- 
101  ($55),  Heathkit  SB104A  ($60).  Also  a 
wide  line  of  SSB,  CW,  AM,  and  special  filters 
for  Yaesu ,  Kenwood,  Drake  R4C  and  7-Line, 
Heathkit,  and  Collins  76S-3B/0. 

NEW!  TS830S  and  Rd20  KITS 
TS830  and  R820  owners  who  have  replaced 
their  1  st  and  2nd  IF  filters  with  a  Matched 
Pair  of  2.1  KHz  Fox*Tango  filters  enthusi- 
astically report  the  fol lowing: 
". . .  VBTnow  works  as  i  dreamed  It  should , . . " 
-  Rasults  are  simost  unbelievable   . .  ' 
.  Spectacuiar  SSB  RX  performance ..." 
": , . ,/  DO  long&r  n^&d  a  CW  Fitter. ..." 
(Mames  on  Request) 
Tests  prove  that  high  quality  Fox-Tango  8- 
pole  discrete -unit  Crystal  Fitters  are  notably 
supehor  to  the  original  units,  especially  the 
modest  45 5 KHz  second  IF  ceramic  unit- 
Substitution  of  Fox-Tango  filters  result  in  a 
bandwidth  of  1.9KHz  at  -edB.  a  shape 
factor  of  1 2,  and  Ultimate  Rejection  of  at 
least  11  OdB! 

(Independent  Report  available  upon  request.) 
Regular  Price;  $55 + $1 25  =  $1 80  +  shipping 
IICrnODUCTORY  PRICE  iComplete  Kit). .  .$1 50 
Includes  Matched  Pair  of  Fox- Tan  go  Filters 
All  cables,  parts,  detailed  instructions 
10%  Qua  nitty  Discoiint  Applies 
Genuine  Fox-Tango  crystal  filters  are  guar- 
anteed for  ONE  y&kB.  Beware  of  cheap 
imitations;  they  are  no  bargain!  Don't  be 
fooled. 

GO  FOX-TANGO  —  TO  BE  SURE! 
ORDER  by  Mail  or  Tetephone.  Pay  by  Visa. 
fVfC,  MO,,  Check  (US$),  Cash,  or  O  0.0. 

AUTHORIZED  EUROPEAN  AGENTS 
Scandanavia:  MICROTEC,  Makedien  26, 

3200.  Sandetjord,  NORWAY 
Other:  INGOIMPEX,  Postfach  24  49. 

D-8070,  rngolstadt.  W.  GERMANY 


FOX  TANGO  CORPORATION 

Box  1 5944S  W  Palm  Beach  FL 33406 
Phone:  1-305-683-9587     >-323 


Ai 


If 


*^S^e  List  of  Advertisers  on  page  114 


73 Magazine  •  Junej982     45 


WIRE  GAUQE 

DIAMETER 

iN  INCHES 

1 

2fl9 

20 
22 
24 

2e 

2t 

« 

032 
029 
(3ti 

• 
* 

HOLES 


o        o 


O  Q  O  O 

RESISTOR 


O 


O  O  O 

TRAM$lSTOfl 


Q-H^nE 


o        o        o        o 


i 

90 


901 


^TEfVMiNAL   FINESSED 
THROUGH  «0L£ 


Fig.  6.  Wire  sizes. 

ers.  If  you  need  a  two-con- 
ductor jack,  and  one  lead  is 
not  supposed  to  be  ground- 
ed, vo*J  will  either  have  to 
mechanicarty  insulate  the 
outside  of  the  jack  from 
ground  or  get  a  three-con* 
ductor  jack  where  you  use 
the  two  inner  conductors 
and  ignore  the  third 
(grounded)  lead. 

Cable 

If  the  circuit  you  are 
building  is  not  used  at  VHF 
and  a  piece  of  coax  is  called 
for  with  a  length  of  12  inch* 
es  or  less,  the  coax  is  being 
used  mainly  for  its  shielding 
capability.  You  can  safely 
fgnore  the  impedance  and 
pick  a  piece  of  coax  on  the 
basis  of  being  able  to  fit  it 
into  your  box  mechanically. 

Wire 

Unless  used  for  high-cur- 
rent leads,  most  solid-state 
circuits  use  just  a  few  milli- 
amperes  per  stage.  There- 
fore, there  is  no  reason  to 


fig,  Z   Use  of  perf board 


use  wire  sizes  larger  than 
number  22  or  24.  As  shown 
in  Fig.  6,  the  lower  the  num- 
ber the  larger  the  wire  diam- 
eter. Pick  wire  which  is  me- 
chanically convenient  Soft 
plastic  insulation  strips  very 
easily  and  conveniently, 
but  if  you  have  to  solder  a 
number  of  them  in  close 
proximity,  the  plastic 
tends  to  melt  and  burn, 
generally  making  a  rather 
unsightJy  mess. 

Printed  Circuit  Boards  and 
Breadboards 

Some  construction  arti- 
cles provide  either  a  PC- 
board  layout  or  a  commer- 
cial source  for  purchasing 
the  board.  If  a  layout  is 
given,  you  can  use  the  PC- 
board  kits  sold  by  several 
suppliers  to  make  your 
own.  However,  if  no  board 
is  suggested,  you  always 
can  use  a  breadboard-type 
construction  to  build  the 
circuit.  Most  hams  have 
one   or   more    breadboard 


CONNECT  TO  POSITIVE  VOLTAGE  SUPPLV 


5) 


r 

03 


I    IWTEGftATEU 


GZE3 


» 


CEZEH 


i    CIRCUIT  J 

r  f-^ 


CEZ4) 

T 
I 


t?    '   '^ 


H' 


^ 


z> 


«    * 


if 


<p3} 


t*  *  *i 


*  * 


3 


CatMECT  TO  tjAOtmp 


Fig.  8.  CommerciallY^^vBilable  PC  board  for  breadboarding. 
46     73  Magazine  •  June,  1982 


circuits,  neatly  enclosed  in 
a  box.  which  have  been  op- 
erating in  their  breadboard 
form  for  many  years.  Even 
if  your  construction  does 
not  come  out  very  neat,  the 
flaws  will  be  hidden  by  the 
enclosure  you  put  the 
circuit  in. 

One  of  the  simplest  con- 
struction techniques  uses 
perforated  board  such  as 
that  sold  by  Radio  Shack, 
Vector,  and  others.  The  cir- 
cuit is  laid  out  just  as  it  ap- 
pears on  the  schematic,  and 
every  time  a  connection 
must  be  made,  a  small  met- 
al terminal  or  clip  is  insert- 
ed in  a  hole  and  the  leads 
soldered  onto  the  terminal 
(Fig.  7.). 

Alternatively,  general- 
purpose  PC  boards  also  are 
commercially  available. 
They  are  arranged  in  a  fixed 
pattern  and,  as  shown  by 
the  dotted  rectangle,  inte- 
grated circuits  plug  in  adja* 
cent  rows  of  holes  (Fig.  8).  A 
bus-bar  system  of  feeding 
ground  and  voltage  is  used, 
where  one  bus  is  connected 


to  the  supply  voltage  and 
iumpered  to  the  IC  pin 
where  required.  Transistors 
and  other  parts  can  be 
mounted  where  conve- 
nient. A  second  bus  is  used 
for  ground. 

Also  commonly  avail- 
able are  small  carrier 
boards  which  will  allow  you 
to  wire  up  one  or  two  inte- 
grated circuits  (Fig,  9). 
Other  parts  are  jumpered 
from  one  terminal  to  wher- 
ever required. 

Generally  speaking. 
sockets  or  molex*  pins  are 
a  good  idea  for  mounting 
integrated  circuits.  If  you 
do  have  a  problem,  you  can 
now  unplug  the  IC  and  test 
or  substitute  without  a  mas- 
sive and  messy  unsoldering 
job. 

Plan  It  Out  and  Then  Build 

Take  a  careful   look   at 

what  parts  are  required  and 
make  sure  you  can  obtain 
them.  Plan  the  layout  of 
parts  and  decide  what  you 
are  going  to  enclose  the  cir- 
cuit in  and  where  the  jacks, 
connectors,  and  controls 
will  be  located.  Don't  hesi- 
tate to  call  for  help.  Often 
an  experienced  ham  in  the 
area  can  offer  an  immedi- 
ate solution  to  your  unique 
problem.  But  if  this  does 
not  solve  the  problem,  you 
can  drop  the  author  of  the 
article  a  note.  Enclose  an 
SASE,  and  help  will  proba- 
bly be  on  its  way  quite 
quickly. ■ 


LANOS 


WOUftTlNE^ 
HOLE 


Fig.  9.  Single-tC  carrier  board. 


QUALITY     parts     at 
DISCOUNT    PRICES  I 


STEREO  8  TRACK 
HOME  UNIT 

8FV^^JD  NEW  UfJlTS,., 
ASSEr^LV  TMCLUDES^ 
TAPE  HEAD,  HOT&R  BELT,, 
110 VAC  MOTOR^  PRE -AMP,' 
|.[&HT$,  SWITCHES, 
SOLENOID  AND  OTHER 

USEFUIL   PARTS 

AW  fXCEPTTt>)AL  eiTT! 

^7,2S  ftR  ASSEMBLr 


4PDT    RELAY 

*  n  Mffil  d  c  Of 

$1.70  EACH 


i^. 


BUZZERS 

WITH   WIRE   LEADS 

1%  t<*  3  ******  75*68 

_^     WITH   PIN   TERMINALS 

5|p^3^     3  t(j  7  volts 

WITH   PiN   TEftMlNftLB 

75«  «ach 


BLACK  PLASTIC 
CASE 


PAC-TEC 
SERTES  C 


J^L^■^^ 


BLAGK   PU^STIC  EMCLOSURE 
ADJUSTABLE   HEIGHT   FRCM 
1h&3"  to  2.^3;'V    WIDT>'I 
6.85'f;   DEPTH  S".    BUILT- 
tN   STANO  OFPS   FOR  P.C. 
BOARDS .. FRONT  AND   BACK 
PAJ^^ELS  NOT    INCLUDED,  , 
$5.25    P€fi  CASE 


MITSUMI 

MODEl    UES-A5SF 
VARACTOft   UHFtUNER 

FREQ      RANGE 
MjO  -  dS^  MHZ 
..  A.NTENNA    TWPtJT 
1^        50(5   OhMS 

$25.00  eacti 
10  for  S220.00 


JOYSTICK 

PRECISION 
DEVICE... 
CONTAINS  t* 

5 OK  CENTER 
TAPPED  ALPS 
POTS * 

S  4. 75  each 


■t^ 


m 


750  MFD  330  V 

PKOTO  FLASH 

2"    HIGH 

Kl    l/V  DtA. 

$1.25  EACM 
ID  FOR  $11.00 


fi^     SEND   FOR   OUR    A/EH/        -« 
®e/  40  PAGE   CATALOG    I'** 


COMPUTER 

GRADE 
CAPACITOR 

11700  mfd^l 50 VDC   S2.0d 

2    1/2"   T>lA   X   1+    V^"  HIGH 

3,600  mfd 
40VDC 

6,400  mfd. 
60VDC 


S1.0Q 

X    3"    HI 

S2,50 


iM 


|t2^00mfcl.  40  VDC  $3.00 

2"   DTA  X   h    1/k"   HIGH 
1 1 8,000  mfd,  /5  VDC  $  4  00 

?    1/:;"   DIA  X   k    l/T'   HEG>i 

20,000  mfd.  as  VDC 

13  "  &1A.    X  2V'  HI0HS2.Q0 
22,000  mfd.15  VDC 


SlA 


X  Z  MZ" 


M  I  G  .H 


$2.CQ 


22,000  mfd.  40 VDC 

'    PIA.    X   6^'   HIGH      $3.00, 


>5.000mfd.75VDC  $4.50 

5"   DIA  X   ft    5/e''   HIGH 

|4S0O0mfd.25VDC 

01  A.    X,  V'   H]QH      $3  50 

172,000  mfd.  15  VDC 

12''  0]A.    Jt   V    HIGH      ^^g.SO 


ICANNONxuu-3-i;^ 
CONN EC 


PROr^G 
Chlfl^SSIS  f^UNT 

tS.OO  EACH 

10  for   $19.00 


L.E.  D.'s 

STAHI^ARII  JUMBO 
DIFFUSED 

RED  10    FOR   51.50 

GRCEN      l<i    FOR   $2.00 

Y£LLQW    iO   FOR  ^^.00, 

FLASHER   LED  /^ 

S   VOLT  OPERATION 
JUMBO  3az€ 

?  FOR  ti.ja 

POLAR   LED 

Z   FOft    Si.  70 
SUB   MINI   LED 

^ 

,079"  X  .098'' 
20inA    ■!  1.75v 

10  FOR   $1.00 
200  FOR  ilS.OO 
OUATgTITY    PRICES  AVAlLAacEl 


fTRANSFORMEl 

120  volt 
primaries 

6  VOLTS  St  150  mX 
12  V.C.T.  It  500mA 
te.5  V.  ftt  3  AMPS 
IS  VOLTS  at  3S0  MA 
18  VOLTS  ftl  1  AMP 


25.2  VCT  at  2.B  AMPSS.50 


5O0  K  LINEAR 
SLIDE  POT 

2    ?/8"   LENGTH 


V*"   TRAVEL 
T"75*   EACH 


MINI 


$17.50  Mch 


AUTOMATIC 
RECORD  CHANGER 

"  B.S.R,    MODEL  cn6R/C/3 
■>  PUVVS   55/^5/73   RECORDS 
mm   SlT^l    8    !/*+"   ^    12" 

TMCLUDFS  DUST  COVER  ANO 
PLASTIC  CASE  CNOT  PICTURED) 
WITH   FRONT  CUT  QilT  TX)  FIT 

STEREO   Lr-IIT   ^NOT   TMCL5JDEDD. 


BLACK  LIGHT 
(ULTRAVIOLET) 


G.E 


H  F6T5&L  S2.60«ach 


:170  MFD  330  V 
PHOTO  FLAShI 

1^"  X   7/S^" 


ALL  CLCCTROniCS  CORP. 


905  S.  Vermont  Ave. 
PO    BOX  20406 
Los  Angeles,  Cafif.  90006 
{21 3}  3&O'BO00 

Mon.   Fri.       Saturday 
9  AM  ^  5  PM    10AM-3PIVI 


See  List  of  Advertisers  on  p^ge  t14 


TERMS 

i  Mipi  Offi*'  ItDOO 
■Afld  S  2.50 

Stiippifi^  USA 
■Cslit  f<*s  Addfi*,, 
■  PTampI  Shipping! ■ 

NO  COD! 


(^20 


f  ^m. 


J 

^^^^mm 

Hi.^.> ...» .  ^y-  -»4dH 
1^.  *:::■• -r-    ■         JH 

^^^^1 

BLjK^-|v;     ■y.^^H 

^H 

^ 

^^^^^Ir  ^ 

.<» 

_j^_rt^Mi^*!i^*-*'** 


5ee  youi  dealer  or  contact: 


.  .  .  and  increased  resale  value,  rely 
on  Cover  Craft  Dust  Covers. 

Try  our  low-cost  protection  for 
ALL  your  equipment  .  .  .  before  it's 
too  late. 

§•  Protects  equipment  and  invest- 
ment. 
O  •  Great  looking. 
W  •   lOO's  of  designs, 
■J     •  Extra  strength  heavy  gauge  vinyl. 
•  Machine  stitched. 


CO  \/FR    r2R  A  F  T*  satisfaction  guaranteed 


CORPORA    TiDN 


0^145 


Box555Q  •  Amhersu  NH  03031  •  (603)  889-6811 


ONLY  $ 


'  VbCom^  Si^  wstvi  gain  antenna"  "^ 

*  'Dramatrcalfy  boosts  reception 

*  G'wm  ^6iJtt  hand-held  feTI  quieting  from  flaees 
yqy'i^  fie^Hy  deadJmviith  a  rubber  jduc^.:;^ 

there's  Vtfhy  it  Vilks  So  W^ll: 

Jn  order  !6r  a  5/a  wave  antenna  t<?  provide  its  full  appar- 
;ent  gam  over"  a  standard  t/4  Wave  whip,  it  rfiUst  not 
^only  appear  as  5/8  wavelength  a!  2  meters,  but  (t 
must  also  utilize  a  ground  pfane  Since  you  can't  al- 
ways operate  your  hand-held  from  a  car  roof  or  ©ther 
metal  base:  Vo  Com  found  a  w^  toamulate  the.-   i:   ; 

At  right  is  the  Grrcuit  that  does  it.  The  coil  that 
doubiie?  ^s  a  base  spring  Is  tap  fed'  and  a-  - 
matched  capacitor  completes  the  reso- 
^nant  circuit.  ;:. 

The  resuit  is  an  antenna  that,  fuify  ex- 
fended,  displays  better  tharf  1,5:1  VSWR 
across  the  entire  144-1 4S  MHz  band. 
And,  when  collapsed,  Jt  is  the  operat- 
ing ec^ulvalent  of  a  rubber  dUck.|Vyith 
8  o1  the  to  sections  exteodied,  H  '    . 
ts  a  5/8  wave  antenna  at  f 
220  MHz.)       - 


// 


Yf 


SttftR- 


l^w 


^  How  to 
teriaVoCom^ 

dnlenha  fron^t^ 
its  itnilatar^: 

this  (Cutaway  shows 
the  base  spring/coll, 
•  ^s  feed  tap,  arid  th^?^ 
-  resonaf>t  cin^lt   - 
capacitof.  ©f  you  cari  -^ 
sirtipSy  check  the  VSVVR—    ^ 

your  trans^mitter  vwlh^ 
app reciate  the  dif f leriir^a. 


x\] 


..i: 


BASE 
SPRING/GOiL 


TAP  FEED 


CAPACITOR 


PRODUCTS  CORPORAXIJPN 

65  East  Palatine  Road 
(512}  459-3680     Prospect  Heights,  IL  60070      ^m 


rii 


m 


73Magazme  *  June,  1982     47 


Ctenn  Jacobs  KC7M 
Poverty  ftat  AZ  35925 


Coping  with  PC  Boards 

it's  not  easy  to  be  virtuous 


"A  dmit  it  You'd  really 
/m  rather  build  it.  Any 
idiot  can  plunk  down  a 
charge  card." 

"Well,  yeah.    /' 

''Glenn,  If  you  build  it  it 
will  give  you  pride  and  ex- 
perience,  and  you1l  know 
how  to  service  it  yourself." 

"Yeah,  but      /' 

''And  it  wouldn't  cost 
nearly  as  much,  and  no- 
body would  have  one  just 
exactly  like  yours/' 

So,  Tm  building.  And  my 
inner  voice  was  right  about 
everything  it  said.  But  there 
are  a  few  things  it  didn^t  tell 
me.  I  found  out  the  hard 
way,  and  I'm  telling  you  so 
you  don't  have  to  "re-invent 
the  wheel/'  like  I  had  to. 

Vm  building.  But  so  help 
me,  when  1  see  those  full- 
page,  full-coior  ads  and  a 
toll-free  number  and  the 
sign  of  the  yellow  and 
orange  overlapping  circles, 
it's  hard  to  keep  at  it.  I 
could  have  any  equipment  I 
want  for  fust  a  phone  call 
and  twenty  "easy"  pay- 
ments. The  path  of  virtue  is 
harder 

Designing  it 

In  the  first  place,  I  don't 
know  much  about  vacuum- 
tube  circuits  and  even  less 
about    solid    state.    For- 

48     73 Magazine  •  June,  1982 


tunately,  I  don't  have  to. 
The  League^  publishes  So//of 
State  Design  for  the  Radio 
Amateur  It's  a  "cookbook." 
It  shows  three  varieties  of 
any  circuit  you  could 
want  — all  pre-engineered 
and  tested. 

Redesigning  It 

Now,  even  with  a 
cookbook,  I  can  make  mis- 
takes. In  fact,  its  about 
even  odds  that  I  will  make  a 
mistake  in  a  one-device 
gadget.  It  is  far  beyond  me 
to  put  forty  '^stages"  on  a 
board  as  big  as  a  73  cover 
and  have  them  all  work.  I 
decided  to  put  each  stage 
on  a  separate  board  and 
plug  'em  all  into  edge  con- 
nectors, That  way  if  (when!) 
I  make  a  mistake,  I  won't 
have  to  tear  everything  up. 

I  mailed  off^  for  some  PC 
board.  It  took  three  weeks 
to  get  here.  They  didn't 
send  it  until  my  check 
cleared. 

Whittling  It 

PCB  is  funny  stuff.  I 
couldn't  trace  anything  on 
It.  I  couldn't  find  any  kind 
of  carbon  paper  that  would 
make  a  mark.  Finally  I 
rubbed  yellow  crayon  on 
the  copper  and  was  able  to 
trace  faint  lines.  I  cut  on  the 


lines  and  peeled  up  the  un- 
wanted foil  in  little-bitty 
strips  with  a  point  of  a 
knife,  it  took  half  a  day.  But 
it  worked,  I  got  a  nice  little 
40m  CW  receiver  for  my 
trouble. 

Buying  It 

For  my  next  project,  I  just 
sent  off  for  ready-made 
custom  boards.^  They  were 
nice,  neat  correct,  beauti- 
ful, and  even  had  the  parts 
placement  marked.  They 
worked  perfectly.  I  made  a 
mate  for  the  last  project 
But  I  wanted  to  do  these 
boards  myself. 

1  sent  off  for  ferric 
chloride."*  This  time  I  called 
up  and  told  'em  my  card 
number  and  they  had  the 
stuff  delivered  to  my  door 
in  about  three  days. 

Mixing  It 

The  ferric  chloride  is  a 
black,  gritty  powder.  I 
mixed  it  with  hot  water  in  a 
plastic  jug.  The  water  got 
hotter.  The  powder  that  got 
on  my  hands  turned  into  a 
brown  goo  all  by  itseff  and 
began  to  sting.  I  went  and 
washed  it  off.  When  I  came 
back,  the  grit  I  had  spilt  on 
the  floor  had  turned  into  a 
nasty  glop.  That  stuff  ab- 
sorbs water  right  out  of  the 


air!  I  wiped  it  up.  The  floor 
is  now  permanently  stained 
several  shades  of  brown, 
black,  green,  and  gray. 

Etching  It 

Anyvvay,  now  I  was  ready 
to  begin.  Or  was  I?  1  cut  out 
a  little  piece  of  the  high- 
priced  board  and  drew  a  cir- 
cuit on  it  in  ink.  I  laid  it  in  a 
plastic  dish  and  poured 
some  of  the  smelly  brown 
juice  over  it.  An  hour  later  it 
looked  gritty.  Two  hours 
later  it  was  covered  with  a 
fine  black  sediment.  I 
rinsed  it  in  the  sink  and 
every  bit  of  copper  was 
gone.  The  thing  might  still 
make  a  banjo  pick,  but  it 
would  not  make  a  circuit. 

Resisting  It 

I  cut  out  another  piece. 
This  time  I  drew  my  design 
with  a  felt  marker.  I  bap- 
tized it  for  two  hours  in  the 
ferric  chloride  soup  and, 
beholdl  — a  printed  circuit. 
The  remaining  foil  was 
rough  and  gritty  — about 
half  eaten  up.  But  it  would 
do.  Now  I  knew  for  sure 
what  to  do  Very  carefully  I 
designed  the  first  board.  I 
felt-marked  it  and  laid  it 
away  in  the  tobacco  juice. 
In  the  morning  there  wasn't 
enough  copper  left  on  the 


board  to  tell  what  it  was 
supposed  to  have  been. 

Next  t  tried  crayon.  I  sirp- 
pose  if  crayon  were  the  on- 
ly resist  in  the  world,  we 
might  make  a  go  of  it,  but 
we  wouldn't  like  it.  It 
turned  out  rough  and  ugly. 
By  now  I  wasn't  trying  to 
make  any  particular  kind  of 
board,  I  just  wanted  to  see 
what  would  get  me  decent 
resu  I  ts. 

Cursing  it 

Oh!  I  found  a  lump  of 
etchant  I  had  missed  be- 
fore. I  stepped  on  it  bare- 
foot and  stained  my  sole 
brown.  I  said  some  words 
that  stained  my  soul  deep 
purple.  After  i  cleaned  up 
the  mess,  1  went  to  bed, 
disgusted. 

Dreaming  It 

Suddenly  I  sat  up.  I  had 
dozed  off  and  dreamed  I 
was  painting  a  pattern  with 
a  tiny  brush.  That  mimeo- 
graph correction  fluid!  I 
had  a  whole  case  of  it! 
Mimeograph  correction 
fluid  corrects  by  drying  into 
a  plastic  film.  And  it  comes 
with  a  handy  little  brush 
built  right  into  the  bottle 
lid,  1  put  on  my  pants  and 
waddled  out  into  the  dark 
to  my  store.'"  There  it  was, 
cartons  and  cartons  of  it  I 
brought  one  in  and  annoint- 
ed  a  little  rectangle  of  cop- 
per with  abstract  designs 
and  flooded  it  with  the  stop 
from  the  jug. 

In  the  morning  I  rinsed 
It  off  and  scrubbed  it  clean 
at  the  kitchen  sink  Beauti- 
ful My  design  was  perfect- 
ly preserved  in  glittering 
copper. 

Sharing  It 

Finally  I  have  found  The 
Way  to  do  it.  And  I  will 
share  it  with  you.  lust  send 
a  dollar  and  a  double- 
stamped  SASE  to  Glenn's 
Trading  Post  at  Poverty 
Flat,  Arizona  85925.  I  will 
send  you  a  bottle  of  gen-u- 
ine  Army  surplus  correction 
fluid  complete  with  a  nice 
little  applicator  brush  built 
right  mto  the  lid    Guaran- 


teed to  delight  you.  Correct 
your  stencils.  Paint  your 
nails  purple  Make  your 
own  PC  boards,  (Who 
knows,  it  may  even  remove 
warts  J  This  is  the  best  stuff 
since  snake  oiL  You  can 
even  see  your  pencil  fines 
on  the  foil  through  the 
fluid. 

Drilling  It 

By  'n  by  I  had  the  first 

board  ready  for  parts.  Near- 
ly ready  for  parts.  Gotta 
drill  it.  All  my  drills  are  too 
big.  I  went  to  a  dozen  hard- 
ware stores  within  a  hun- 
dred miles.  The  smallest  or- 
dinary drill  bit  is  a  sixteenth 
of  an  inch.  It's  positively 
teensy.  But  the  components 
just  fell  out  of  the  holes. 
Even  after  1  soldered  them. 
The  best  I  could  do  was 
bend  the  leads  over  hard 
after  poking  them  through 
the  holes.  Then  they  would 
stay  in  place  long  enough  to 
be  soldered,  But  the  holes 
were  so  large  it  left  a  quar- 
ter-moon  gap  around  each 
lead  It  didn't  look  neat.  It 
didn't  look  professional  If  I 
had  wanted  a  ventilated 
board,  I  would  have  made  a 
pattern  of  round  holes  on 
purpose, 

"I  need  a  smaller  drill." 

"No.  You  need  smaller 
holes.  Or,  you  need  to  be 
less  picky/' 

"All  I  want  is  a  drill  half 
that  size," 

"There  ain't  any  in 
eastern  Arizona.  You  need 
something  else/^ 

"tf  it  drills  holes,  ain't  it  a 
drill  bit?" 

"Not  necessarily/' 

My  wife  broke  a  sewing- 
machine  needle  as  I  argued 
with  the  inner  voice. 

"Honey,  get  this  broken 
needle  out  for  me,  will  you, 
please?" 

Grinding  It 

I  did.  A  broken-off 
sewing-machine  needle 
looks  a  lot  like  a  little-bitty 
drill  bit.  I  ground  a  bevel  on 
the  notched  side  of  it  with  a 
whetstone  and  it  looked  a 
lot  more  like  one.  I  chucked 


POWER-LINE 


iDese  Wkrs  prolsct  any  sensitive  efectronic 
fltpipfiient  fro-m  power  tine  transient  damage 
and  radio  frequency  interfefence  Botti 
modets  offer  surge  suppression  for 
power  line  "spikes".  RF  intef- 
ference  is  suppressed  using 
trath  inductive  and 
capacitive  components. 
Ideal  for  compulers, 
lest  equipment,  or  TV. 


LFZ-A  duplex  outlet;  120V.  8  amps  . .  .S39J5 

LF6— Three  separaie^v  fJltered  duplex  ouileis, 

130V,  total  fused  capacity  15  amps, 

power  swilcti  and  indicator  lamp $69.95 

Add  12.50  shipping  and  tiandNng  p€r  order. 
Send  check  witli  order  and  pfovtde  street 
address  for  UPS  stiipmervt.  Otiio  residents  add 
Sales  Tax,  Ct^arge  card  bu^rs  may  call  toil-free: 


DRAKE 


1-800-543-5612 

In  Ohio,  or  for 

mformatJon.  call: 

1-513-866-2421 


R.L.  DRAKE  COMPANY 

540  Ricriard  Street.  Miamisburg.  Ohio  45342 

INSTTTirnOMAL  AND  DEALEff  IHOUIItO  IMVTTiU 


the  shank  into  my  hand  drill 
and  found  it  would  go 
l:hrough  PCB  like  a  hot  knife 
through  butter.  It  made  a 
neat  round  hole  with  the 
foil  pushed  up  around  the 
edge  like  the  rim  of  a  moon 
crater.  And,  the  hole  was 
too  little  for  a  resistor  lead. 
But  sewing-machine  nee- 
dles come  in  different  sties 
and  for  a  buck  at  the  friend- 
ly local  notions  counter.  1 
had  an  assortment  of  drill 
blanks  just  the  right  sizes 
for  component  leads. 

Concluding  It 

You  can  roll  your  own 
printed  circuit  boards  with- 
out spending  a  fortune  on 
special  supplies  and  equip- 
ment 

You  can  draw  your  pat- 
tern right  on  the  copper 
with  an  ordinary  pencil  and 
erase  it  until  you  get  it  right. 
You  can  paint  directly  on 
the  board  with  mimeograph 
correction  fluid.  You  can 
see  your  pencil  lines  right 
through    the    purple    film. 


You  can  remove  it  with  a 
fingernail.  When  you  are 
satisfied  with  your  pattern, 
a  mixture  of  ferric  chloride 
and  water  wilt  etch  it  for 
you.  Plain  water  will  clean 
it  up,  with  a  little  scrubbing. 
If  you  can't  get  the  size 
of  drills  you  need,  ready- 
made,  you  can  make  your 
own  out  of  sewing-machine 
needlesJi 

Footnoting  ft 

U  American  Radio  Relay 
League,  Newington,  Connecti- 
cut  06111. 

2.  There  are  a  fot  of  places.  J  got 
mine  from  Fair  Radio  Sales.  Box 
1 105»  Lima,  Ohio  45802, 

3.  Again,  there  are  several 
sources.  Try  Circuit  Board 
Specialists.  Box  969,  Pueblo, 
Colorado  81 002- 

4.  Meshna,  Box  62,  East  Lynn, 
Massachusetts  01904.  They 
may  be  out. 

5.  Glenn's  Trading  Post.  Poverty 
Flat,  Artzona  85925. 

73  Magazine  •  June.  1982     49 


TELEVISION 


M 

WE  WILL  NOT  BE  UNDERSOLD!! 

Complete  Systems,  Antennas, 
Receivers,  LNA's  &  Accessories 
CALL  US  TODAY!  -320 

812-238-1456 


hoosier 
electronics 


Nation's  Largest  Total  Communications  Distributor 
P.O.  BOX  3300  •  TERRE  HAUTE,  INDIANA  47803 


ft 


,^/ PARABOLIC  DISH 

NO  WARP.  CHIP.  OR  DELAMINATION 

■  ALL-STEEL,  ONE-PIECE  MOUNT 

■  ACCURATELY  MACHINED         AVAILABLE 

■  Q'AVi  "  OVERALL  DIAMETER 
WITH  MOUNTING  RING 

Write  for  quarifity  discount 


DAKOTA  MICROWAVE 

P.O.  BOX  27002 
GOLDEN  VALLEY,  MN  5S411 


AT 

MINNEAPOLIS  MN. 


^  AVAILABLE  NOW 

^<^   AZDEN  PSC-300 

TWO-METER  HANDHELD 


PCS-300  NT 
PCS-3000XCVR 
Remote  cable 
Phased  ant. 
Other  ace. 


$290,00 
285.00 

37.00 

28.S0 

CatI 


KDK 


also;  2025A  MK  M 
(VVnr  mic.t 
Free  shipping  in  USA         $265,00 
for  all  XGVR  or  NT  orders 

B.  G.  CARL  ELECTRONICS 

11128  Claka  Ave. 
Northridge,  Calit.  91326  ^469 

Call:  (213)  363*1 21 6-»anytime 


Uiilv«rMkl  ConimiifiicAtliKii 

A  DIVISION  OF  INNOVATIVE  LABS,  INC. 

P.O.  BOX  339 

ARLINGTON.  TEXAS  76004  0339 


SUPERVERTER  I $99.95 

The  ultimate  In  converter  technology!  Dual-stage  selec- 
tive preamp,  mixer,  i.f.  amplifier  and  no*drlft  crystal-con- 
trolled oscillator.  We  recommend  this  unit  for  txptrl 
•nctd  kit  buHdtrt.  12v  Stationary  Power 
Supply . .  ,$24,95  lor  Superverter  L 

SELECTIVE  PREAMP. $39.95 

This  r>ew  unit  Is  not  like  other  wideband  praam ps.  Ex^ 
perienced  kit  builders  can  easily  add  this  unit  to  our  e^- 
isttng  boards  or  to  Other  manufacturers"  boards  to  im- 
prove overall  performance. 

2300  MHZ  CONVERTER  KIT $35.00 

Complete  with  PC  board,  parts  and  iQ-page  instruction 
book. 


VARIABLE  POWER  SUPPLY $24.95 

Complete  kit  includes  all  components  for  working  ur^it, 
including  deluxe  box  and  overlays. 

DISK  YAGI  ANTENNA. $25.00 

Complete  kit  with  PVC  and  mounting  bracket.  Stronger 
than  loop  yagi,  and  equal  in  gain. 


4^FOOT  DISH  ANTENNA  ,.,,..,.•...  $54.95 

Overall  25  dB  gain.  Partial  assembly  required.  Shipped 
UPS  (ground)  only. 


1 


TERMS:  COO,  Money  Ofxler,  Bank  Cards 
HOURS:  8:30-4:30  COST;  MON-FRi 


(ei7)-860-1641 


SEE  YOU  IN  DALLAS 
AND  SAN  OlEGO 


Our  product  may  be  copied,  but  the  performance  is  never  equalled,  p  q  box  339  ARLINGTON 

^UNIVERSAL  COMMUifiilCATIONS      TX7«,b4^ 


50     73 Magazine  •  June,  1982 


EARTH  STATION  OWNERS  &  DEALERS: 


You've  got  terrestrial  interference... 

We've  got  fiiters! 

The  concrete  under  your  new  earth  station  isn't  hard  yet,  but 
youVe  got  trouble  already— unwanted  microwave  signals  are 
destroying  your  picture  Your  customer  is  throwing  tantrums,  and 
you  have  two  choices:  Tear  ft  down  and  eat  the  installation  costs. 
or  filter  it. 

We  can  help.  Call  us  and  well  send  you  MTV/82,  which  tells 
how  to  eliminate  terrestrial  interference  on  earth  stations  and  lists  a 
complete  line  of  filters  designed  and  tested  for  this  purpose. 
Created  for  effective  use  by  novice  and  experienced  earth  station 
operators  alike,  MTV/82  explains  each  type  of  interference, 
describes  the  symptoms  and  recommends  specific  filters  to  solve 
your  specific  problems. 

•  microwave  S  tF  bandpass  filters 

•  fF  traps 
PfOducts  include:     •  waveguide  adapters 

•  power  dividers 
m  coax  adapters 

•  specials! 

Call  or  write  today  and  weHt  also  send  you  FG/82,  "Earth  Sta- 
f/ons  &  Terrestrial  interference:  A  Filtering  Guide  for  the  Instafling 


6743  Kinne  St.,  EdSl  Syracuse,  NY  13057 
Toll  Free  t -800-448-1666 TWX  710-541-0493 


APPLIED  INVENTION 

^^_fHt_^jUUHVjbjMjll  SPtiP  ITATf  I  SiT*.TE-OF  Tut  *<i1 

Go  As     FETS    by  MITSUBISHI 

MciF- 1400  4  zSKi^ah  M0F*1  «0z  ^'iTnUGH  * 

1412  \2SK'J7'^)  TESTED  And  '^-A^^^^H^'^.CES 

1403  a  Gafr^  ^  rtft  NE^  ^^T^J*f  t.Dw  ^)uii*e  atnp  ) 
r  P^XX-  '^^         *HF  "wiwi    fjm  tor  antH 


.* ,rii>  ,■  1  somw  mmt  PO  rti  1  nnH?) 


Microwave  Modules 

MfTSUBISHI  K  e^NO  Hy[v<ci 

Dip|prlr.£,  fttffcormlDr  1U  1  »*MHj'    'l.,,  u.^,^.  i  l-  iJh- ■■linvi.-.s 

F0-1*10Y    11  50r12OC»4i   UEH170FIV1$«  %3J  T^ 

FO-UFl  1ILF  Ha)«faavnB  r«»ivflf    TO  4Sa  Ght  LO 

Shoflllir  mtMft.  h5|h  tjt  haw  tf^pctiOn  £34!  2& 

apici#v  FM  a  wnt  m  i«uOg*«J  LD?r  \  CmhH^I 
X  Banij  Hsm  Mtftennn  1 1  ^tSB  UfRTOa  Vr-R i  ^0  Piith^i  ti B  00 

Components 


iCW<  KTCOli  iHfO  iifA^ 


faltvf  l4t(f 


b*jh  fl,-.t  ..  4i^ri4,.L<^   iy>i^   Il0*il+-'  J    -^S^tS-^ntpr'      '*iUi'  J ''    l^7  M 


7ao2P7G02  or  1  4GHr      ra<K)pfG04   1  J   2eOH; 


^t%mm     c^QiPftpr   C^1l»  0  «i»  Octi       f3  iv 


SOLDEfl  #1  DISK  CAPAPTCmS  fOf  VMF  IHtf  Ofpaa^tq 

WC    J^Mv«i        KOO  7^  4;PI1  tdOtpf    to  <t>r  S?  ^ 


oPioELEcmoiici  *tf^  mttmm^  *¥s 


MELCOA  FMaiCn«^    ttl      f3l»     Cl«  Iv^rti 


uMMuti  onocA    &s  00  mm  kktmie  «  hamquvg 

&3  V?  91  Uody^n  lUPSf    f  ?  SJ3  on  oWf  <tepf4 
N  y  5? ATI  nESffiilVTS  ADO  iV  SAtfS  tAX 
SASE   FOR  CATALOG 


STAR  VIEW  MODEL  12K 
•Complete  System 

•  Easy  to  Install 

•  Reasonably  Priced 

«UPSShippable 
Weight  125  Pounds 

•  More  than  100 
Channels  Accessible 

THE  STAR  VIEW  t2K  SYSTEM  KIT  CONTAINS: 

•  1 2  Foot  Antenna 

•  Azimuth  Elvvatton  Mount 
•24  Channel  Receiver 

•  1 20  ">  Low  Noiaa  Amplif  l«f 

•  F«ed  Horn 

•  Cabtoe  &  Connector* 

•  No  Modular  Included 
(Mav  be  ordered  separately  for  ^79.95} 

Available  through  your  tocaf  Cratg  Star  View  dealer  •  Call  or  wrfte  f or  inf ormation  • 
Dealership  inquiries  weJcoma  •  Price  subject  to  change  without  notice. 


R.D.2       nOUTE  31        HtLLSOALC.  NV     t2S29 


H&R    COMMUNICATIONS,    INC.    subsidiary  of  Cralg  Corp 
Route3.  Bo«  103G  .  Call  800-643  01 02 

Pocahontas,  Arkansas  72455  "^  *  or  501-647-2291 


'See  Ltst  at  Adverttsefs  ott  p&ge  1 14 


T3  Magazine  «  Jiine/1982     SI 


'Lite  Receiver  IV 

the  second  half 


i.  Richard  Chfistian  WA4CVP 
6(X)  Norion  Drive 

S.  f.  {Mltchj  Mitcheii  }r  WA40SR 
PO  Box  973 
Mobile  AL  36601 

This  is  the  second  part  of 
a  two-part  article  on  the 
'Lite  Receiver  IV^^  *  ]n  the 
first  installment  [May,  1982, 
731  we  described  our  philos- 
ophy for  designing  a  home- 
brew receiver  that  can  be 
easily  duplicated.  The  Lite 
Receiver  IV  is  the  culmina- 
tion of  that  design  phitoso- 


k  1 


Lite  Receiver  IV  is  a  trademark 
of  Martcomm,  Inc. 


phy.  The  receiver  completes 
the  home-brew  system 
which  started  with  our  low 
noise  amplifier  (February, 
1982,  73]  and  easy-to-build 
downconverter  (March, 
1982,  731 

The  fir^t  Xit*^  R^Qeiver  IV 
insta!fment  covered  the 
70~MHz  bandpass  filter/i-f 
amplifier  board  and  the  vid- 
eo demodulator  board,  Afso 
included  was  an  intercon- 
nection diagram  showing 
how  all  of  the  boards  were 
connected  together.  In  this 
installment,  we  describe  the 
audio,  automatic  frec|uency 
control,  and  metering  cir- 
cuits. For  ease  of  building, 
printed  circuit  board  layouts 


and  parts  lists  are  provided. 
A  source  is  provided  for 
etched  and  drilled  pfjnted 
circuit  boards  for  those  not 
wishing  to  "roll  their  own/' 

Dual  Audio  Board 

The  audio  circuit  pro- 
vides for  switch  selection  of 
either  6.8-MHz  or  6.2-MHz 
audio  subcarriers  from  the 
satellites.  The  circuit  shown 
in  Fig.  1  is  designed  around 
Motorola  MCI  3S8  audio  de- 
coder ICs;  however,  RCA 
CA3065  or  National  LM3065 
iCs  can  be  used  as  direct  re- 
placements The  board  can 
drive  a  small  speaker  and 
has  a  front-panel  audio-level 
control  if  the  speaker  is  used 


or  the  audio  level  from  the 
MC135tis  is  sufficient  to 
drive  most  rf  modulators. 
Complete  component  cost, 
exclusive  of  the  printed  cir- 
cuit board,  should  be 
around  $15.00, 

Construction 

The  printed  circuit  board 
and  parts  overlay,  Fig.  2, 
make  construction  simple. 
We  did  not  use  sockets  for 
the  ICs;  however  there  is  no 
reason  not  to  use  them  with 
the  relatively  low  rf  frequen- 
cies involved.  The  coils  are 
about  $1.00  each  from  RCA 
distributors. 

When  building,  you  must 
decide  on  the  options  that 


«^-' 


Front  panel  of  the  Zite  Receiver  fV, 
52     73 Magazine  •  June,  1982 


**>- 


Top  view  of  the  lite  Receiver's  dual  audio  board. 


you  want.  If  you  do  not 
plan  to  use  a  speaker  but 
need  audro  only  to  drive 
your  rf  modulator,  then  the 
LM386  and  its  associated 
components  can  be  elimi- 
nated. In  that  case,  the 
front-panel  level  control 
will  not  be  needed,  but  be 
sure  to  install  the  two 
SOk-Ohm  printed  circuit 
board  pots  since  they  con- 
trol the  amount  of  audio 
available  from  the  MCI  358s. 
If  the  LM386  is  not  in 
stalled,  the  center  pole  of 
SI  is  connected  to  a  rear- 
panel  jack  for  connection 
to  your  rf  modulator  If  the 
LM386  is  installed,  then  the 
output  of  the  LM38fa  is  con- 
nected to  the  rear-panel 
jack  for  connection  to  a 
speaker  or  to  your  rf  modu- 
lator. We  use  the  convplete 
circuit  as  shown  so  that  a 
small  speaker  can  be  used 
when  we  carry  the  receiver 
out  to  the  antenna  to  make 
adjustments. 

If  you  decide  that  you 
want  the  speaker  drive  capa- 
bility,  replace  the  two 
50k-Ohm  PC  board  pots 
with  lOk-Ohm,  quarter-Watt 
resistors  ThelOkOhm  resis- 
tors provide  fixed  attenua- 
tion of  the  audio  level  from 
the  MCI  358s.  The  front-pan- 
el control  is  then  used  for 
audio  level  for  both  the 
LM38b  and  your  rf  modula- 
tor 

Note  that  picofarad-size 
capacitors  are  silver  mica, 
with  all  other  capacitors  ce- 
ramic or  electrolytic. 

Tune-Up  Procedure 

For  tune-up,  it  is  neces- 
sary to  have  a  signal  genera- 
tor  or  use  a  signal  off  the  air. 
If  your  signal  generator  has 
modulation  capability,  en- 
able the  modulation  and 
tune  the  output  of  the  gen- 
erator for  6.2  MHz  Tune  LI 
for  maximum  audio  level 
and  L2  for  best  audio  (which 
probably  won't  be  very 
good  because  most  signal- 
generator  modulation  is 
AM).  If  the  signal  generator 
is  CW  only,  then  tune  both 
LI  and  L2  for  maximum 
quieting.  If  the  LM386  was 


omitted,  adjust  the  50k- 
Ohm  pot  for  correct  modu- 
lation level  for  your  rf 
modulator. 

To  tune  the  b.frMHz  cir* 
cuit,  simply  repeat  the 
above  procedure  with  the 
signal  generator  set  for  6.8 
MHz  and  tune  L3  and  L4  as 
described. 

Off-the-air  tune-up  can  be 
performed  using  the  sanr>e 
procedure  as  above.  How- 
ever video  will  have  to  be 
detected  by  the  video  de- 
modulator board  since  the 
audio  is  a  subcarrler  riding 
on  the  video  signal.  If  the 
signal^generator  tune-up 
method  is  used,  it  still  will 
be  necessary  to  fine-tune 
once  you  have  a  signal  off 
the  air.  Simply  adjust  for 
best  audio  quality. 

If  the  LM386  and  a  speak- 
er are  used  all  the  time,  be 
sure  to  heat-sink  the  voltage 
regulator  and  the  LM386, 
This  completes  the  audio 
section  of  the  receiver. 

Afc/Metering  Board 

The  afc/metering  board 
gives  afc  control  for  the  mix- 


PRINTED  CiRCUlT  BOARDS 
Printed  circuit  tx^ards  are  available  from  Martcomm,  fnc,  PO 
Box  74,  Mobile  AL  36601.  The  dual  audio  bomd  \s  $12.00  and 
the  afc/metering  board  is  $15.00.  Add  SI. 75  per  order  for  first 
crass  postage. 


DUAL  AUDIO  BOARD 

Parts  List 
2  IVTC1358  ICs.  See  text. 
1  LM386  IC 

1  7812  voltage  regulator 

2  50k-Ohm  PC  board  mount  pots.  See  text- 
1  lOk-Ohm  pot,  paneJ  mount.  See  text. 

1  10-Ohm,  v^-Watt 

2  220  Ohm,  V4  Watt 

2  10k  Ohm,  V^-Watt.  See  text. 
2  4-pF  silver  mica 
2  l2'pF  silver  mica 
2  2?-pF  silver  mica 

2  33-pF  sliver  mica 

7  .01 -uF  djsc  ceramic 

4  ,047-  or  .05-uF  disc  cefamic 

1  .05  uF  disc  ceramic 

3  1-uF  electrolytic 

1  10'UF  electrolytic 
1  100-uF  electrolytic 

1  SPOT  switch,  panel  mount 

2  coils.  LI  and  L3,  transformer'Sound/if,  stock  number 
130120,  from  RCA  PM200  sound  board. 

2  coils.  L2  and  L4,  coil-discriminator,  stock  number  130121, 
from  RCA  PM200  sound  board 

1  printed  circuit  board,  single-sided,  G-IO,  available  from 
Martcomm.  Inc.,  PO  Box  74,  Mobile  AL  36601. 


' 


--Cji 


«,  «HH} 


"S 


«£MHl 


SI 

FRONT    PAMEL 


t 


TO  flF 

MO0UL4TOff  IF 
LM3e$  NOT  USE&. 

SEE  TE)(T 


'I2V      ^ 


4=33pf  y\ 


l2pF 


lOd.f  4ycm3  OUT  TO 

-\\ -•  l*-itfll  on 

TO  ftf 
W0DUL4T0R 


1 


a 


FROM  VIDCO 

DEMKXlgLATOR 

BOAAtt 


L 


/ft 


T' 


'^livoc 

FROM 
PO*£R 
StJPPLT 
BCMRty 


J 


fig.  1.  Dual  frequency  audio  demodulator  arrd  amplifier  schematic.  *See  text  All  pF  capaci- 
tors are  silver  mica.  All  others  are  disc  ceramic  or  etectrolytic. 

73 Magazine  •  JuneJ982     53 


ft 


.05 


ton 


T 


LM386 


.01 

-II- 


7a  1 5 


I^F 


01 

01  ^  ,01 


Ifif 


^^ 


047 


SOK 


.01  •"  .0 

XiJ. 


T 


r 


12  PF 

-H- 


L2 


c 


} 

33pF 

1358 

4}— 


L3 


Z7fif 
^^  047 
£20n  4pF 


aaon 


4pF 


Dx 


33pF 


fig.  2,  PC  board  and  parts  tayout  for  the  dual  audio  board. 


AFC/METERlNG  BOARD 
Parts  List 
1  LM324  IC 

1  IK'Ohm  PC  board  pel 

2  5k-Ohm  PC  board  pots 

1  5k-0hm  panel  mount  pot 

1  10k 'Ohm  PC  board  pot 

2  Ik'Ohm.  V*-Watt 

2  2.2k  Ohm.  V4'Watr 
6  lOk-Ohm  V4-Watt 

1  1  megohm,  Vi-Walt 

3  -Ol-uFdisc  ceramic 

1  ,022-yF  disc  ceramic 
2 1-uF  electrolytic 

1  47-uF  electrolytic 

2  1N270  germanium  diodes 

1  0-1-mA  meter 

2  SPOT  switches 

1  printed  circuit  board,  single-sided^  G-10,  available  from 
Martcomm,  Inc,  PO  Box  74,  Mobile  AL  36601. 


er  local  oscillator  (vto)  and 
provides  drive  for  a  relative 

signal-strength  meter. 

The  signal-strength  meter 
is  not  a  necessity  for  the  re- 
ceiver, StilL  meters  seem  to 
impress  people  and  we  are 
no  exception  It  does  serve  a 
very  useful  purpose,  how- 
ever The  meter  comes  in 
handy  for  adjusting  your 
LNA  and  antenna,  and  it 
gives  a  relative  indication  of 
signal  to  noise  for  your  com* 
plete  system. 

As  can  be  seen  from  the 
schematic  in  Fig-  3,  there  are 
four  op  amps  used  on  the 
board,  We  needed  three  for 


■7fi4LiNCt 


/fr 


P4 

roK 


*7uf 


JT^n 


lOK 


5h*  FftOtif  iPJiti£l 

TuftC 


TO  V70    ON 
BOARD 


01 


ftOH   VIDEO 
0CPD[WLAT13ft  eOA]«D 


TUMI^Mfi 

MFTEH 

0-lrtiJ& 


Fig.  J.  Afc/metering  hoard  schematic. 
54     73  Magazine  •  June.  1982 


the  afc  circuitry,  so  one  was 
left  over  We  decided  to  put 

it  to  use  to  drive  the  meter. 
The  70'MHz  output  from 
the  i-f  filter  amp  is  picked 
off  through  a  coaxial  tee 
coupled  with  a  .01 -uF  capac- 
itor. The  rf  is  then  fed  to  a 
voltage  doubler  composed 
of  two  1 N270  germanium  di- 
odes. The  dc  from  the  volt- 
age doubler  goes  to  an  op 
amp  connected  as  a  non-in- 
verting buffer.  The  op  amp 
drives  a  0-1-mA  relative  sig- 
nal-strength meter. 

Afc  Circuit 

The  automatic  frequency 
control  (afci  like  the  meter- 
ing circuit,  is  not  an  absolute 
necessity.  But  it  sure  is  nice 
to  have  it  lock  the  vtoonto  a 
transponder,  as  the  vto  does 
drift  in  frequency  due  to  am- 
bient temperature  fluctua- 
tions. 

It  was  decided  to  provide* 
for  afc  with  normal  or  in* 
verted  video.  There  is  not 
much  inverted  video  on  the 
satellites,  but  occasionally 
you  do  run  across  an  "up- 
side-down" transponder 
Also,  on  a  single-conversion 
system  such  as  ours,  it  is 
possible  to  tune  in  the  image 
of  a  transponder  But  if  the 
video  switch  is  in  the 
'NORM'  video  position. the 
afc  will  "push""  the  image 
signal  away  instead  of  lock- 
ing onto  it. 

Refer  to  the  schematic  in 
Fig.   3.    At   the   afc   sample 


The  'Lite  Receiver's  afc/metering  board 


point  AFC-2,  we  are  not  de- 
tecting a  peak  or  a  null,  but 
instead  a  dc  level  which  is 
compared  to  a  reference  sig* 
nal  at  pin  3  of  the  LM324 
quad  op  amp.  The  first  op 
amp  in  the  chain  is  wired  as 
a  non-inverting  voltage  com- 
parator.  Its  output  is 
summed  with  the  transpon- 
der tuning  pot  voltage  to 
supply  the  tuning  voltage 
for  the  vto  in  the  downcon- 
verter  (mixer),  A  span  pot, 
R2,  and  a  zero  pot,  R3,  are 
provided  to  calibrate  the 
transponder  tuning  pot, 
since  vtos  have  different 
voltage-to-frequency  ratios. 

The  third  op  amp  is  used 
as  Br\  inverting  buffer  for  in- 
verted video.  As  can  be  seen 
on  the  schematic,  the  video 
normal/reverse  switch  is  a 
double-pole,  double-throw 
switch.  This  switch  reverses 
the  afc  action  when  you 
switch  from  normal  to  in- 
verted video.  Also,  provision 
was  made  to  turn  the  afc  off 
but  not  change  the  tran- 
sponder tuning  pot  calibra- 
tion. R4  sets  the  afc  refer- 
ence level  the  same  as  the 
afc  voltage  of  a  properly 
tuned  transponder  when 
the  afc  is  switched  off. 

Construction 

A  printed  circuit  board 
layout  and  parts  overlay  are 
shown  in  Fig.  4.  There  is 
nothing  critical  about  the 
construction  of  this  board. 
lust  use  good  soldering 
technique  and  keep  com- 
ponents flat  against  the 
printed  circuit  board.  Use  an 


IC  socket  for  the  LM324 
since  tune-up  of  the  board  is 
done  before  the  LM324  is  in- 
stalled. Do  not  connect  the 
tuning  pot  wiper  to  point 
"W"  on  the  PC  board  yet. 

Tune-Up 

Connect  the  tuning-pot 
wiper  to  the  vto  at  this  time. 
Connect  the  AFC-I  and 
AFC-2  points  to  the  video 
demodulator  board  Con- 
nect to  the  +15  volts  regu- 
lated and  dc  ground  return 
on  the  video  demodulator 


Bottom  v/ew  of  the  dual  audio  board. 


board.  Set  the  video  switch 
to  "NORM"  and  the  afc 
switch  to  "ON." 

With  the  LM324  un- 
plugged, test  for  +15  volts 
at  pin  4  of  the  LM324  socket. 
Tune  in  a  transponder  and 
measure  the  voltage  at  pin  2 
of  the  LM324  socket  Move 
the  meter  probe  to  pin  3  on 
the  socket.  Then,  using  R1, 
set  the  pin  3  voltage  to 
equal  the  pin  2  voltage.  Now 


switch  the  afc  switch  to  the 
''OFF"  position  With  the  afc 
switched  "OFF/'  set  the  pin 
2   voltage   with   R4   to  the 

same  voltage  as  with  the  afc 
switch  "ON."  Now,  remove 
power  and  plug  or  solder  in 
the  LM324.  Connect  the 
tuning-pot  wiper  to  point 
"W"  on  the  afc  board,  and 
connect  the  afc  board  out- 
put (marked  vto)  to  the  vto. 
Be  sure  to  use  coax  or  well- 


Tosr 


0£>jF 


'^»*    T* 


+  ISV 

FROM  VIDEO 

DEMOD  BOARD 


FROM  AFC  SWITCH 

TO 
'  METER 


l^f^     j:,Ol 


FROM 
TOMKi  AMP 


TO  VTO 


TO  S2-A 
REV 


FHOW 
AFC#| 


Fig.  4.  PC  board  and  parts  layout  for  the  afc/metering  board. 

73 Magazine  •  June,  1982    55 


' 


PLESSEY- AVANTEK 


PU&SEV    WT£CRA1£D  ClRCUtTS 


Sl^lfclti  RF  Ampiiticr 
5LI6II  RF  Aniphfi«f 
SLl«t2  AF   Amplifier 

^L\€i\  ACC  Cen 
Si1i;2   AF   An|iVOC 


J. OS 


SkHJi  A.ir  r^i/ACC   Amp  i.ll 

l.tS  S1.HJ&  AU  DetMCC  ^ni|^  «.flr 
4.  Ji  StI&Ji  VOCAO/Stf^fijFic  1,  7 J 
4  4?    SL1«ta  AF  Afihi  a.li 


J.n    St1»11   AF   Aj*p 


*  OJ 


SUlMO  Ovtiblv  U^t  litud   4.07 

5^tfi«4e  F:^t  K .  , .    A  '  Amiir «.  * : 
SL^ftSB  FM   RtLvr    IS   Q  A  J    1^ 


AVANTeK     GPO     $ERIE$     AMPLIFIERS 

CGPD  401.40£«403}    $25.00  EA, 

12       u  da  Gaifi     &  boo  I.I1H/ 
ClRCUiT   flOAfeD&   FOR   CPP   ^tQ&_St^RltS    ^VP^    ^?   ^-^  -,> 

AMATEUR 
MICROWAVE    DOWNCONVERTER 

COMPLETE       ASSEMBLED       HfcAOV    TO  INSTALL       MOT  A   KIT 

SPECIAL    $179.95 


IWC.LUDINC  SHfPPSWC    fl..,J\S.t 


V(SA    ANO  MASTtRCABO  ACLtPTEIi 


5C'  dO   SVSTEA1  CAIN 
TUNE&   2.1   the.   lei   ?,4Ch#. 
PREAMPLIFIER   iO»   dH  t.AIN    *tt2.  5 
OUTPUT    tLTNES   TV   CHANNELS   ? 


dB 
TCi 


NF 
h 


OuTI»uT   IMPLDANCE   75  OH    SOC  UHWi 

f  I. '  I  I     V I  A n   WARRANrv 
HLRf'Okl^iANCf  CUARAKiTEtD   OR 
VOL-H   .MONL>    ftLFUMJtU 


CALL    (804)489-2156        .4« 
ELECTRONIC    HOBBY    INNOVATIONS 

751Q     GRANBY     STREET     SUITE   20?     NORFOLK    .  VIRGINIA     Z3505 


shielded  cable  to  connect 
the  output  of  the  afc  board 
to  the  vto.  (Usually,  the  vto 
will  be  remotely  mounted  m 
the  downcoriverter,  located 
at  antenna )  The  afc  board 
output  is  controlling  the 
voltage-controlled  oscilla- 
tor in  the  mixer,  so  any  stray 
signal  or  noise  spikes  picked 
up  by  the  cable  will  result  in 
the  vto  being  "modulated'' 
and  will  cause  it  to  change 
frequency  with  very  undesir* 
able  effects  on  the  picture. 
With  the  afc  switch  "ON" 
and  the  video  switch  set  to 
"NORM/'  the  tuning  pot  will 
act  like  a  channel  switch.  As 
the  tuning  pot  is  rotated,  the 
afc  will  try  to  hang  onto  a 
transponder  as  long  as  possi- 
ble; then,  it  will  "jump"  to 
the  next  transponder.  Be- 
cause of  the  ''jump/'  the  ef- 
fect is  to  ''switch"  transpon- 
ders! Frnallv.  adjust  the  zero 
pot,  R3,  to  set  transponder 
#1  close  to  full  counter- 
clockwise position  of  the 
tuning  pot  Adjust  the  span 
pot,  R2,  to  set  transponder 


#24  close  to  the  full  clock- 
wise position  of  the  tuning 
pot- 
Now,  with  a  01 -m A  meter 
connected  to  the  meter  out- 
put, tune  in  a  transponder 
and  impress  people. 

Rf  Modulator 

We  have  not  described 
the  rf  modulators  that  we 
have  tried  since  we  just 
haven't  found  a  circuit  that 
we  are  happy  with.  At  pres- 
ent, we  are  using  the  rf  mod* 
u  la  tor  in  our  RCA  video  tape 
players  The  rf  modulator 
therefore  costs  only  four 
times  what  the  complete 
'Lite  Receiver  IV  costs! 

Correspondence 

Because  of  the  com  pi  ex  h 
ty  of  the  'Lite  Receiver  IV, 
we  may  not  have  answered 
all  your  questions.  We'll  be 
glad  to  try  to  answer  any 
questions  that  you  might 
have  if  you  include  a  self-ad- 
dressed stamped  envelope 
and  are  patient  in  awaiting  a 
reply.  ■ 


2300  MHZ  QUAUTY  KITS  THAT  PERFORM! 


UCC't        DOWNCONVERTER        KIT  S350O 

Include  quaiiiy  PC  board,  NE02t37  xsirs,  maichect  dKXtes.,  mofded 
coils   all  PC  bovd  parts.  „t41  semi  ng id  ccmx.  and   12  page  instrucl 
ion    book  22  db  g^n.  5S  db  NF 

UCCl       OOWNCONVEfiTER       KR"  142.00 

The  UCC  1  with  N£b4S3S  titgh  gam  RF  iraitstatof 

SMC1       DELUXE       DOWM       CONVERTER       KTT  14^00 

Tfvt  L>OC-i  M  wim  eMti^AS    irHituties  mc^rfni)  duft  stab^liEati&n    low 

tefTip  SOJdef.  F€l  ancl  F59  Cf>cirveciOf&.  IV  nvatcnicig  utmt    pl^n^  rof 

many  types  of  sni&xnm,  ai*d  very  detdiit^  26  page  msimcltcii  indii 

ual   Rec»>miTwndGd  (of  I  he  Ijfsi  fiin^  bu^ffStif 

SliC'2       DELUXE       DOWNCONVEHTER       KIT  $50.00 

Tti€t  SMC-1  wijh  NEi64i}i*j  titgh  gam  RF  ti(*i)bi>tur 


RFA'1  i  STAGE  SELECTIVE  PREAMP  $39  95 

"SiopsigrV    shdipu   mates   with   duwnconviirter   byard,   Selecuvti   filter 
reduces  onage  noi^.         16  db  nel  gn\n 

TUfl        DELUXE        POWER        SUFPLV        KIT  S39.S5 

Qualily  Lflau  and  smooth  tuning  mt  spec,  pul    Coinpiele  wHtt  2  K, 
c^Dit*  k  matLniii^  Mfmr   Othei  powpr  auyply  ktls  tram  Si/95 

ANT^       DISK        VAGI       ANTENNA        KIT  SSO.OQ 

32  eiesnenl  tJn^  y^igi  wiin   \2  inc*i  'wedthi^prool  hoy^ng    Now  irKliMlt'^ 
ad|usldDte  mourihrig  DfBiiket^  i.Thri<tMied  rud  not  ^rtctudedij^ 


SEND  BASE  FOR  CATALOG. 


WE  PAY  ALL  SHIPPING  CHARGES 

DISCOUNTS  ON  ORDERS  OVER  $100. 


I 


ORDERS  ONLY 

800-368-3028 


ViSA 


Superior  Microwave  ProducU^  Inc. 
P.O.  Box  1241 

Vienna.  Virginia  22180 


Information  &  Orders     •^^ 
from  VA.  &  Wash.  M^tro 
Area        Cafi  703^255-2918 


i^are 


master  cftaig* 


Alaska 
Microwave  Labs 

433S  L  5TH  STRHT  ANCHORAGE,  AUSKA  99504 
[9071 338-0340  ^406  DEPT  73 


CHIP  CAPACITORS 


1  2.  22.  3.3.  4.7.  6  8.  10.  IS.  22.  27.  47.  10G  I>1J 
lBi0.22fl.2/[),33C.39O  470.5SO,e60,BKI.  IK.  1,2K 
1&K.  iJgK.  i.2K.  lOK  lOOiK 


GaAs  FETS 


Mui^uafi  Hi-  i.mQ   >^   *QHt  mag   isoa 

UGFl4t2    NF    a.«P3    #    4aHZ    WAG     IBOg 
UCHjSO  NFIjODB^  IGHZ.  NF  Z2f»  &  MAG  I4DB# 
.HZ 


eOAX  CONNECTORS 


BMC    CHASSIS    U0UI^7    SQUARt     FiA.    : 
BfC  PLy£  FOR  RS-a 

^UA  CHASSIS  mmm  square  flauge 
sit  A  CM  ft  ^*;  J*;  tioum  nm  so    fiAHSE 

&MA    C-  s     HGUhl    SlfUP-Lime     TAB 

mA  HUG  Hm  m-iA 

r\H     H    CHASSIS    MQUNJ    SOlfAflE    FLANGE 
lYtl:  h  Plug  FDH  Rt8•fl«^B 

TVHt  H  Muatt  MALI 

TVPt  ^  FOfl   m  SEMhRlGlD 

1VF*£  N  GHASSfS  MOUNT  PLUG  SflLABE  FLANGE 


S19S 

SS50 
S&75 

»^ 

^M 
S3  75 

S3JS 

S7.2i 

S1S.IX) 

S14  00 


SILVER  PLATING  KIT 


Will  [\\.u\-  Caiipei.  lifjss.  fir^jUc'c.  Niikd    I  in  Puwii^r. 
Gold,  imd  ^m^^  wrviie  mist,^i  [iikj^i.  $^, 


VTO 


Vfi?r-1  2.?liH^  to  32fiHZ  Mm  POWfR  Uiif    I       - 

f  LINING  VOLTAGE  fi  TO  2av  Vf  ;DC  #  60  MA    SSfiOD 

tfftZ  I  1  SAMr  4S  V7?T-i  BUT  Fht  ^  .  u..^H/  TO  1 3GHZ    SSS  00 


TEFLfW  CIRCytT  BOARD  061  SIDED  1  OZ 


-rrtiui   4*5  -  ilJ  "  JJIO  Silo 

APPflClX  J  25-  50'*  mn  S6  SO 


FEED-THRU  CAPACITORS 


^  r  Pf  SOtOEBrYPE 


LEADLESS  CERAMIC  CAPACITORS 


1000  Pf 


<W  WMftWTS  OK 


OPEN  ftT  8  PM  EST  CLOSED  aPM  PST 

onoiRS  ARE  POSTAGE  PAJD 

COO  -  VISA  -  MASTEACHARGE 


56     73  Magazine  •  June,  1982 


r 


MICROWAVE  TELEVISION 
SUBSCRIPTION  TELEVISION 

MICROWAVE  TELEVISION 
EDUCATION   MANUAL.  $16.25 

Our  updated  manyal  includes  miCfowave  con 
epts   aniennas  a(>d  dDwoconveitefS  incur 
lelailed  scherBatics  and  P  C  t>oard  layouts 

SUBSCRrPTlON  TELEVrSION 
EDUCATION  MANUAL-.  S14.95 

r^o    scrdmD*ing    &    decoding    systems    art? 
ejcpiored  «n  deptti  Signal  capture  and  moditica 
tion  tectTMiques  are  preser^red  tar  educalrgrial 
anrtlysis 

AIVIATEUR  MICROWAVE 

RECEIVER  SYSTEM       $169,93 

Cnntmumg  \n  fhe  tirgh  quality  and  per  I  or  ma  nee 
mat  you  ve  come  to  Icnow  in  tne  HMRII   itiis  re 
ewef  tias  a  new  desjqn  and  increased  qam 

INFORMATION  PACKAGE  ON  ALL 
VIDEO  PRODUCTS  AND  KITS  S2.00 
ORDER  INFORMATtON; 

■'     ft  6  5'I.  b^lei,  tax    VISA    ml  MASTERCARD    . 

ABEX 

PO  BoK?6B0i  G  *^n4 

SanFrancjstD  CA  941  ?6  6601 

^  ili  ^  ^  ^  3tt  #  3(C  3le  3k  ^  ^  3^  Jfc  a|E  ^  3JC  :ijE  3|e  3^  ;|c  3H  ^  3l&  3|e  3l( 


SATELLITE  TVRO 


RECEIVER  COOKBOOK 

*  Build  a  good,  solid  understaridrng 
of  s^eeJIite  receiver  tecl^nology 

*  Step  t)v  step  guide  of  eacti  stage 

*  Compteie  theory,  schematics,  and 
construction  details, 

TVRO  RECEtVER  KIT 

*  Pre-assembled,  tested  RF  section, 

*  No  complex  alignment  or  Special 
test  gear  required 

*  Ultra -tow  coSt/higt>  perfofmance, 

*  Desigrted  from  c^ookboofc  circuits 

*    «     p 

S9,95    ,    CoolcbooSc 

$1 59.95 Coolcbootc  plus  Kit 

Send  to 

NORTH  COAST  MICROWAVE 

PO  SoK  5663,  Cleve^  Ohio  44101       ^^^ 


Dual  Stage  Microwave  Ppeamplif ier 


Ifistall  Ihe  Ampire  2001  in  your  micro* 
wave  receiving  system  to  improve  the 
noise  figure  and  system  gain. 

•  2.0  to  2.6  GHz  band 

•  3.5  dB  nojse  figure 

•  22  dB  gain 


/newT 


12  to  18  vdc 

30  ma  current 

Zener  regulated 

Diode  protected 

Interface  cables  included 

90  day  warranty 

Fully  assembled,  NOT  a  kit! 


4       +       I        F 


q       ■        ^       H 


Ampire  2001  ..,,..,. 

Ampire  2001 N    .. 

Shipping.     USA .     *2*'    Forergn 


t       li        P       P        4       ^ 


,*129*^ 
.*149** 
.  .*10"° 


^SA- 


TBH  fMterowave  Copp 

22518  -  97th  Avenue  No 
Corcoran.  MN  55374 

612-49S-8014 


^135 


♦-'See  Usf  of  Ad\fertisefS  on  p&ge  lU 


Your  own  satellite 
TV  system  for  52,586.°^ 

10  FT.  PARABOLIC 

What  the  systeni  will  do: 

You  can  receive  up  to  60  channeh  of  TA\  direct  from 
^atc Hires  to  your  home  receiver.  Movies,  sporting  evenfs. 
religious  programs,  other  T»V,  Ma  lions,  and  much  more. 

What  the  system  inc hides: 

1,  10  ft,  Rhcrglaiis  dish  made  of  reflective  metal  bond 
with  fibergiass*  Weather-resistant  and  virtuallv  mainten- 
ance-free. Dish  comes  in  4  sections. 

2,  Single  pcdt'^tal  heavy  dutv  polar  mouot  for  extra 
strength  and  insiallation  simpllciiv:  easy  i»atetlite  to  sat- 
ellite adjustmenE, 

3,  Four  pole  rotator  mount  for  more  siahilitv,  square 
tuhe  legs  and  rotator  included^ 

4-  All  aluminum  LNA  mount  and  hortt  ho^er  for  accU' 
rate  aiming  i>l  LNA.  All  aluminum,  weather-proof  LNA 
cover. 

5.  Drake  F.SR-24  Receiver  or  Auto-Tech  Rec^i%'er. 
Your  choice*  Down  converter  located  at  the  dish. 

6.  Amplica  or  Avantek  LNA  120*. 

7.  I'happarel  Feed  Horn  for  unsurpas!»ed  quality 
H.  Alt  accessories  included. 

Complete  Systems,  Receivers, 
Antennas^  LNA's  &  Accessories 

CALL  US  TODAY!  901-795^4504 


13  FT, 

PARABOLIC 

DISHES 


TENNESSEE  ELECTRONICS 

P.O.  BOX  181108 


,^  T09 


MEMPHIS,  TENNESSEE  38 US 


The  Luly  ANTENNA 
and  POLARIZER 

Completely  portable  Antenna,  comes  fully  assembled  (folds  like 
an  unbrella  and  is  noi  a  kit). 


The  Polarizer  is  an  etectronic  roiatof.  which 
can  change  polarities  with  a  flick  of  a 
switch  (no  moving  parts).  Eliminates  weight, 

twisting  cables,  freeze 
ups,  and  down  time. 


1^53 


For  More  Information 
Write  To: 


LULY  TELGCOMMUNICATION5  CORP. 

P.O.  Box  231 1 ,  San  Bernardino.  California  92406 

(714)888-7525 

Deafer  and  DistriDuwr  inQuines  Welcome 


73 Magazine  •  June.  1982     57 


/,  Richard  Christian  WA4CVP 
600  Nonon  Drive 
S3t§um3  AL  i6572 

S.  f  fMitch)  Mhchett  Ir.  WA40SR 
PO  Box  973 
Mobile  AL  36601 


TVRO  Transducer 

waveguide-to-coax  transition 


Trans-duc-er  (trans-doo'- 
sar)  n.  Any  device 
through  which  the  energy 
of  one  power  system  may 

be  transmitted  to  another 


system,    whether    of    the 
same  or  a  different  type. 

Now  that  you  know  the 

dictionary  definition   of  a 


transducer,  let's  look  at  the 
satelhte  TV  definition:  the 
gizmo  that  hooks  the  anten- 
na horn  to  your  LNA 

Simply  stated,  the  trans- 


Sf£ffS    4f^G  SACK 

MAKE   fROM     040    SHE^T"  9f7ASS 
OR    COPPER 


BENQ  90-    t2  PL^CtSy 


MAKE   \  EACH    FROM   ^/S*^  THICK 
BRASS   Oft  COPPEI? 
DRitt   4    EACH    CORNER   mQUHUHQ 
HOLES    TO   SUIT    TYPE   'W 
CONNECrOff    TAP  fOR    A-40  THREADS 


r 


-*|s/ie" 


T 


TOP  AHa  BOTTOM  Ptt€€S 

i£ND   90'    QH  m^OnHH    LIHES.    5    PLACES 
J^AKE    ?    FROM     Q40*    SHEET    SRA^^    Q^ 
cgpp£ft      OhJir    I    WJJ.I.    HAV£    4/16"    HOLE 
At    LOCATION   SHOWN 


T" 

3/A-  1_ 


If 


WAitE    I   EACH     040   BRASS  OR    COPPER 

MAKE  TAO  TO  F|T  AfdO  SOLDER  TO 
CENTER  CONDUCTOR  OF  TVPE  "N" 
CON(«ECT0ft 


Fig.  1.  Parts  dimensions  and  bending  instructions. 
58     73  Magazine  •  June.  1982 


ducer  is  a  section  of  wave- 
guide 3/4  of  a  wavelength 
deep  with  the  back  closed. 
The  waveguide  is  a  trans- 
mission line  and  has  a  ve- 
locity factor  different  from 
that  of  free  space.  A  signal- 
pickup  probe  is  installed  1/4 
wavelength  from  the  back 
(closed  end)  and  1/4  wave- 
length from  one  side  of  the 
box.  The  1/4-wavelength 
spacing  ensures  that  any 
4  GHz  energy  that  gets  past 
the  probe  and  is  reflected 
from  the  back  of  the  box  to 
the  back  side  of  the  probe 
will  be  in  phase  with  the  sig- 
nal arriving  'head  on/' 
since  1/4  wavelength  from 
the  probe  to  the  back  of  the 
box  plus  1/4  wavelength 
from  the  back  of  the  box 
back  to  the  probe  equals 
1/2  wavelength.  The  1/2- 
wavelength  spacing  mini- 
mizes phase  distortion  and 
signal  cancellation 

Two  Methods 

Our  transducer  can  be 
built  in  one  of  two  ways.  If 
you  are  lucky  and  can  find 
some  4-CHz  copper  wave- 
guide, most  of  the  work  is 
already  done  for  you.  lust 
cut  off  a  2S'  section  of  the 
waveguide.  Take  a  scrap 
piece  of  waveguide  and  cut 
a  piece  to  fit  the  back  of  the 
2.5"  piece.  Solder  the  two 
pieces  to  form  a  box  with 
one  end  open.  Make  sure 


that  no  solder  gets  inside 
the  box  Using  the  instruc- 
tions below,  prepare  and  in- 
stall the  T'^square  piece, 
the  probe,  and  the  coax 
connector.  This  waveguide 
method  was  used  to  build 
the  transducer  in  the  photo. 

If  yo^  ^^^  ^*^t  lucky 
enough  to  have  a  friend 
with  a  source  of  waveguide, 
you  will  have  to  ''bend" 
your  own.  The  material 
needed  is  .040''  brass  shim 
stock  or  sheet  flashing  cop- 
per. Most  large  sheet-metal 
shops  have  small  scraps  of 
such  material  thai^  can  be 
purchased  at  a  very  reason- 
able price. 

Cut  the  7.3''X115" 
piece  of  material  and  bend 
it  to  a  U  shape  as  shown  in 
Fig  1.  Cut  two  pieces  2.8* 
X2.8''-  [You  probably  can 
get  the  sheet-metal  shop  to 
cut  the  material  with  their 
shear  for  good  clean  edges.) 
Bend  the  edges  of  the  two 
pieces  90  degrees  as  shown 
in  Fig.  1. 

Drill  one  2.8"  X2. 8* 
piece  as  shown.  This  piece 
will  be  the  bottom  of  the 

box,  so  that  looking  into  the 
front  of  the  box,  the  probe 
hole  will  be  in  the  bottom 
on  the  right-hand  side.  The 
photo  shows  how  the  probe 
is  offset. 

Thoroughly    clean    all 


3  3/4* 


2  1* 


pieces    in    preparation    for 

soldering  Assemble  the 
three  pieces  to  form  the 
box,  and  clamp  or  wire 
them  together  If  necessary, 

slightly  bend  the  U-shaped 
piece  outward  to  ensure  a 
tight  fit  when  the  top  and 
bottom  pieces  are  installed. 
With  a  large  soldering  iron 
or  small  propane  torch,  sol- 
der all  seams  Be  sure  that 
no  solder  gets  inside  the 
box.  If  any  solder  gets  in- 
side, clean  it  out;  you  want 
a  very  smooth  surface  in- 
side the  box  to  minimize  in- 
terference with  the  signal 
energy. 

Installing  the  Probe 

The  1*-square  connector 
spacer  (see  drawing)  must 
be  made  from  1/8"  brass  or 
copper  Drill  a  1/2-inch  hole 

in  the  center  of  the  1* 
piece.  Then,  using  the  type 
N  chassis-connector  mount- 
ing holes  as  a  guide,  drill 
and  tap  the  piece  for  4-40 
screws.  Sweat-solder  the 
1''-square  plate  centered 
over  the  5/16"  hole  in  the 
bottom  of  the  box  (now, 
transducer!).  Cut  the  pickup 
probe  from  .040"  brass  or 
copper  scrap  to  the  dimen- 
sions shown  in  the  drawing- 
Solder  the  probe  to  the 
center  connector  of  the 
type  N  connector.  The  dis- 
tance  from  the  connector 
flange  to  the  end  of  the 
probe  is  13/16" 


1 


?   3/4 


I  ts" 


Fig.  2.  WR-229  waveguide  flange  dimensions.  Flanges  may 
be  purchased  or  made  fmrn  sheet  brass  or  copper  1/16'* 
thick  or  heavier.  White  not  absolutely  necessary,  some 
method  must  be  used  to  mate  the  transducer  to  the  horn. 
Solder  the  flange  flush  with  the  transducer. 


End  view  of  a  transducer  made  from  copper  waveguide. 
Note  the  clean,  smooth  interior. 


Now  install  the  connec- 
tor to  the  waveguide,  using 
4-40  screws,  making  sure 
that   the   flat   side   of   the 

probe  is  toward  the  front  of 
the  waveguide. 

Connecting  to  the  Horn 

After  constructing  your 
transducer  by  the  easy  or 
hard  method,  you  still  have 
to  mechanically  connect  it 
to  your  antenna  horn.  This 
is  where  a  WR'229  wave- 
guide flange  comes  m  real 
handy.  If  you  don't  have  ac- 
cess to  a  WR-229,  you  can 
make  one  from  1  /8"  brass  or 
copper.  Mild  steel  also 
could  be  used,  but  is  more 
difficult  to  solder  Refer  to 
Fig.  2  for  the  dimensions  if 
you  have  to  make  your  own. 

Solder  the  flange  flush  to 
the  front  of  the  transducer. 


Sand  or  file  off  any  excess 
solder  for  a  smooth  transi- 
tion from  the  flange  to  the 
transducer  Drill  mating 
holes  in  the  flange  to  mate 
with  the  flange  on  your 
horn.  We  use  .141"  hardline 
coax  from  the  transducer  to 
the  LNA.  This  small  coax 
can  be  bent  easily  so  that 
the  LNA  can  be  installed  di- 
rectly behind  the  transduc- 
er- 
Final  Comment 

We  have  heard  of  several 
people  building  horns  and 
transducers  from  double- 
sided  printed  circuit  board. 
We  have  gone  the  PC-board 
route,  but  with  very  poor  re- 
sults Stick  with  the  sheet 
copper  or  brass  and  you 
should  get  good  results 
with  a  minimum  of  trouble- 
Good  transducingtB 


Fig.  3,  Tbree-D  drawing  of  the  transducer. 

73 Magazine  •  June,  1982     59 


Stephen  Gibson 
PO  Bon  1S5S6 

Hoffywfxxi  CA  90038 


The  MTV  Music  Box 

Satellite  Central,  part  VII 


Part  of  the  fun  of  TVRO 
experimenting  is  search- 
ing for  new  signals.  While 
Video  is  an  easy  mark,  the 
real  gold  is  sometimes  hard- 
er to  find,  especiaily  since 
new  services  keep  popping 
up.  The  'video  records"  are 
a  good  example.  Slide  by 
transponder  11  on  Satcom  3 
(131  degrees  west),  and 
you'll  find  Music  Television 
(MTV),  a  cable  service  from 
Warner  Amex 

You  may  wonder  why  you 
are  seeing  rock  groups  blast- 
ing their  brains  out  in  near  si- 
lence. It's  because  the  audio 
portion  of  MTV  is  not  on 
your  typical  TVRO  receiver 
outputs  of  6  8  or  6.2  MHz 
Instead,  different  subcarrier 
frequencies  were  picked.  Se- 
curity? Perhaps, 

Rock  and  roll  music  may 
not  be  your  cup  of  tea,  but 
the  MTV  delivery  technique 
may  become  popular  and 
worthy  of  more  investiga- 
tion since  it  is  sent  in  stereo. 
And  more  important,  you 
can  experiment  with  a  neat 

60     73 Magazine  •  June,  1982 


trick    that    mighty    Warner 
never  thought  of! 

Stereo  Trickery 

just  having  two  sound  de- 
tectors to  get  stereo  isn't 
enough  You  need  a  decod- 
er, too.  Don't  bother  with  a 
stereo  FM-decoder  setup 
because  it  won't  work.  MTV 
combines  both  channels, 
L  +  R,  on  one  subcarrier  and 
sends  the  difference  be- 
tween the  channels,  L  — R, 


on  the  other  subcarrier. 

You  can  hear  the  sum 
channel  on  a  6.62-MHz  sub- 
carrier  and  the  difference  on 
5.B  MHz.  Alt  you  need  to  do 
is  a  little  addition  and  sub- 
traction with  the  electron- 
ics, and  voila.  they  sepa- 
rate into  left  and  right!  [f 
you  add  the  L  +  R  signal  to 
the  L  —  R  signal,  the  +  R  and 
the  ^R  cancel,  leaving*  just 
L,  or  2L,  if  you  want  to  be 
technical  about  it. 


Photo  A.  Front  view  of  the  Music  Box. 


Likewise,  if  you  subtract 
L  +  R  from  L~R,  you  get 
just  2R.  The  secret  to  ail  the 
addition  and  subtraction  is  a 
"matrix/'  which  is  a  short 
and  fancy  way  of  saying  two 
op  amps  from  Radio  Shack. 

Before  you  rip  the  top  off 
your  receiver  and  start 
tweaking,  you  should  con- 
sider an  option.  Why  not 
build  two  more  sound  sec- 
tions plus  whatever  else  is 
necessary  in  a  separate  box, 
sparing  your  receiver?  Don't 
worry  if  you  are  a  Novice  or 
your  last  project  was  an  old 
tube-type  Selecto-Jet.  I've 
found  an  easy  way  for  you 
to  build  this  gadget 

Simple  Circuit  Details 

The  unit  connects  to  your 
TVRO  receiver  at  the  same 
place  your  internal  sound 
subcarrier-detector  circuits 
tap  off.  Referring  to  Fig.  1, 
the  detected  composite  vid- 
eo with  audio  subcarriers  is 
coupled  to  two  separate 
subcarrier  sound  detectors. 
One  detector   is   tuned   to 


6.62  MHz  and  will  give  you 
an  L+R  output.  The  other 
detector  is  tuned  to  5.8  MHz 
and  delivers  an  L  ^  R  output. 
Each  detector  output  feeds 
two  op  amps.  I  used  a  TL084 
because  it  is  cheap  (avail- 
able at  Radio  Shack)  and 
works  rather  well.  You  get 
four  amplifiers  in  a  single 
chip.  That  sure  beats  the 
6SN7  that  some  of  you  may 
remember. 

A  portion  of  the  L  +  R  de- 
tector output  feeds  the  in- 
verting input  of  the  top  op 
amp  in  the  diagram.  The 
L  — R  detector  output  feeds 
the  non-inverting  input  As 
in  typical  op  amp  fashion, 
its  output  is  just  the  differ- 
ence between  the  two  in- 
puts. So  much  for  the  sut 
traction  part  of  the  matrix. 
Addition  is  performed  in  the 
bottom  op  amp  by  summing 
the  L  +  R  and  L  -  R  detector 
outputs  into  the  inverting  in- 
put, isolation  is  superb  in 
this  configuration  because 
the  inverting  input  is  driven 
towards  ground. 

An  Evening  Pioject 

The  subcarrier-decoder 
circuits  in  May's  edition  of 
"Satellite  Central"  will  work 

very  well.  You  can  make  a 
PC  board  for  two  detectors 
or  use  perf-type  vector- 
board  and  hand-wire  the  cir- 
cuit in  record  time.  Or  you 
can  even  buy  some  dual- 
sound-section  subcarrier  PC 
boards  from  one  of  the  73 
advertisers  and  just  stuff  'n 
solder. 

But  if  you  are  in  a  rush 
{and  who  isn't  nowadays)  or 
if  you  are  just  learning 
about  electronics,  I  suggest 
you  take  the  lazy  way  and 
simply  buy  two  RCA  XL-100 
sound-section  modules  like 
those  described  last  month. 
Servicemen  call  them 
PM-200S.  These  little  mod- 
ules are  complete  TV-set 
sound  sections  and  simply 
plug  into  the  popular 
XL-100.  Of  course,  they  are 
tuned  to  4.5  MHz  (TV 
sound),  but  we  can  tweak 
them  to  the  frequencies  we 
want.  In  fact,  we  can  modify 
them  so  that  we  get  pretty 


:S^  £  g£MH| 


DtTECTOft 


EE^EN-rCRt 


*  RIGHT 


ADJLXST^BLE 
l-F  tR4NS 


9  OWHt 


VOLT 


\20 
VAC 


Ih 


lA 
Bt^lDGE; 


^ 


Fig.  1.  Two  PM-200  subcarrier  detectors  and  a  TL0B4  op  amp  are  all  you  need  to  hear  MTVsat- 
eltite  stereo. 


hi-fi,  too.  Get  two  RCA 
MAAOOIAs  from  a  local 
RCA  distributor.  They  run 
about  15  bucks  each.  You 
may  be  socked  with  a  $3.00 
dud  charge. 

Modification  of  the  PM- 
200/MAA001A  modules  is 
very  easy  We  simply  reduce 
the  values  of  two  capacitors 
so  that  we  can  tune  higher 
than  4,5  MHz  and  then  add 
two  more  capacitors  to  get 
better  sound.  Referring  to 
Fig.  2,  remove  the  T299  can 
and  change  C290  (82  pF)  to 
50  pF  Replace  the  can,  Then 
change  C295  (68  pF)  to  25 
pF.  Now  the  unit  tune^  from 
53  to  nearly  fi  MHz, 

Next,  solder  a  .01  /jF  ca- 
pacitor from  pin  13  on  the 
CA'^065  IC  to  a  ground 
trace.  This  sets  the  de-em- 
phasis to  75  ^sec  using  a  re* 
sistor  inside  the  chip  Then 
solder  a  5-^F  (or  so) 
capacitor  from  pin  B  on  the 
C A 1065  to  a  spare  trace.  If 
you  don't  see  a  spare  trace, 
then  cut  the  trace  from  pin  B 
on  the  CA3065  leading  out 
to  the  edge  of  the  board  and 
solder  the  rap  acros**  this 
trace  cut.  Just  be  sure  the 
cap  IS  polarized  (end  with  + 
on  it)  towards  the  chip,  Now 
you  have  a  dc-blocked  out- 
put to  your  amp.  We  don't 
use  the  preamp  inside  the 
chip  because  a  quick  look  at 


the  distortion  specs  would 
drive  any  audiophile  back  to 
AM  radio! 

Last  solder  a  50k  PC-type 

mini-pot  from  pin  6  on  the 
chip  to  a  ground  trace  This 
is  a  volume  control  that  we 
use  in  the  mixing  process. 
You  can  use  larger  shaft- 
type  pots  and  mount  them 
on  the  front  panel,  but  they 
are  likely  to  get  bumped  lat- 


er on  and  will  only  reduce 
stereo  separation.  So  why 
bother? 

Depending  on  your  TVRO 
receiver,  you  may  need  an 
input  bandpass  filter  to  cut 
noise  from  the  video  and  ad- 
jacent audio  subcarrier.  The 
input  coil  [T299)  works  pret- 
ty welL  but  a  cheap 
10  7-MHz  FM  if  transformer 
padded  down  to  the  proper 


WAAOOfA 


no*  7 


L4(f    ^    4^    4^      4*  ! 


^0'Jtt>Hf 


100 


ITU 


^ 


L__ J 


X  P6llQit 


i 
2»V 


r 
I 

I 


16 


m 


s 


Fig,  2.  The  RCA  PM-200  uses  a  CA  J065  quadrature  FM-detec- 
tor  IC  for  43'Mliz  audio.  The  few  mods  discussed  in  the  text 
will  make  it  perform  very  well  as  a  stereo  sound  decoder. 

73  Magazine  *  June,  1982     61 


' 


Photo  6,  Clean  out  that  junk  box  with  this  project  since  noth- 
ing is  critical.  For  example,  two  72-T8-vo/t  transformers  can 
be  used  instead  of  a  single  24-36  volt.  Even  another  op  amp 
likely  will  work. 


frequency  knocks  out  what 
little  noise  is  left  Not  all 
transformers  are  the  same, 
so  a  gdo  or  an  rf  generator 
will  separate  the  winners 
from  the  losers.  The  second- 


ary usually  has  a  center  tap. 

Junk  Boi  Jubilee 

I  decided  to  take  a  strictly 
plain-vanilla  approach  since 
I  knew  my  iittle  Music  Box 


WHY  QUAD? 

Back  in  the  dark  ages  of  stereo«  David  Haf  ler  of  Dynaco  was 
experimenting  with  techniques  to  eliminate  the  so-called 
**hole  in  the  middle"  between  left  and  right  channel  speakers 
—see  Tig.  3(a),  From  that  effort  came  a  center-channel  speak^ 
Bf  which  was  simply  the  ^eft  and  right  channeEs  combined 
(L  +  R)  and  played  6  dB  softer.  Then  he  went  one  better  and 
suggested  a  single  speaker  behind  the  listener  to  add  am- 
bience. Logically,  this  ambience  channel  would  consist  of  the 
difference  between  the  channels,  or  L-R,  Remember,  we 
started  with  only  two  channels  from  tape  or  disk*  This  was 
revolutionary  to  audiophiles,  but  old  hat  to  motion-picture 
people  who'd  been  doing  it  for  years  with  Cinemascope  and 
3D.  (Funny  how  simple  technology  doesn't  cfoss-poHinate 
now  and  then.) 

Anyway,  Michael  Gerzon  in  England  improved  on  the  idea 
with  the  typical  left*  and  right-front  setup  by  feeding  the  dif- 
ference (L  —  R)  to  separate  speakers  tocated  at  "left-rear"  and 
"right-rear"  and  out  of  phase— see  Fig,  3(b).  It  sounded  so 
good  that  record  people  started  recording  ambience  with  a 
reverse  matrix  setup.  Then  Ihey  tried  discrete  channels,  and 
you  had  technology  go  mad  with  the  consumer  wondering 
which  system  (o  choose.  So  much  for  history-  Most  stereo 
recordings  have  some  ambience  imbedded  in  them,  so  this 
technique  Is  worth  the  extra  effort  to  track  down  an  old  ampli^ 
fler  and  two  smafi  speakers  to  fiddle  with  quadraphonlcs. 

A  5th  Channel? 

ff  the  front  speakers  are  widely  separated,  you  can  connect 
a  5th  channel  to  go  between  them.  This  will  indeed  reduce 
separation  but  tends  to  fNi  lhe**hole  in  themiddre'*  effect.  Cin* 
ema  sound  processors  use  this  technique  with  an  age  to  re- 
store apparent  separation.  Since  a  signal  that  would  appear 
to  be  located  at  a  point  m  space  between  the  speakers  wouid 
have  to  t>e  coming  from  both  the  left  and  right  channels,  we 
must  assume  that  it  is  the  sum  of  the  channels,  or  L  -^  R— see 
Fig.  3jc).  So  feed  another  amp  with  the  L+  R  output  of  the 
Music  Box  and  place  the  speaker  between  left  and  right 
speakers. 


would  soon  be  lost  in  the 
never-ending  wire  jumble 
behind  my  preamp  I  used  a 
utility  box  and  mounted 
RCA  jacks  for  all  the  outputs 
to  my  stereo  system  (See 
Photo  A)  The  rf  input  was  a 
lowly  phone  jack  since  I  be- 
lieve in  using  everything  in 
the  junk  box.  Use  mini-coax 
if  you  have  some.  The  input 
transformers  can  be  sol- 
dered to  the  bottom  of  the 
PM-200S,  The  op  amp  was 
mounted  on  an  experiment- 
er's  breadboard.  All  boards 
were  mounted  on  standoffs. 
The  PM-200  already  has  a 
hole  in  it  for  6-32  hardware. 
Be  sure  to  use  voltage 
regulators  to  smooth  the  rip- 
ple. The  op  amps  won't  see 
ripple  when  running  from  a 
bipolar  supply,  but  the  little 
PM-200S  want  pure  dc. 

For  the  most  part,  con- 
struction is  not  critical  other 
than  the  suggestion  that  you 
use  coax  to  feed  the 
PM-200S.  Also,  you  should 
use  5%,  V4-Watt  resistors  in 
the  op  amp  matrix  [all  100k). 
While  the  pots  on  the  detec- 
tors can  be  used  to  compen- 
sate for  tolerances,  we  do 
want  the  tune-up  process  to 
be  easy. 

Next,  you  should  modify 
your  receiver.  Find  the  loca- 
tion where  the  6.2-  and 
6.8-MHz  detectors  connect 
This  is  usually  an  emitter  fol- 
lower after  video  detection. 
Tap  in  with  a  dc-blocking  ca- 
pacitor. Then  run  more  mini- 
coax  to  a  BNC.  type  F.  or 
RCA  jack  that  you  mount  on 
the  rear  of  the  receiver.  Take 
your  choice.  Use  what  you 
have.  The  signal  is  then 
patched  to  the  Music  Box 
with  stilt  more  coax. 

Tune-Up  Hints 

There  are  two  ways  to 
make  the  Music  Box  play. 
Yoy  can  simply  set  both  50k 
pots  for  minimum  resistance 
(that's  maximum  volume) 
and  tweak  the  input  trans- 
formers, the  T299  coils,  and 
L299  coils  for  sound.  But 
knowing  which  subcarrier 
you  are  on  may  be  a  trick. 
Add  to  that  the  possibility 


that  you  may  have  both  de- 
tectors tuned  to  the  same 
carrier,  and  you're  sure  to 
see  there  must  be  a  better 
way. 

Use  a  signal  generator  set 
to  6,62  MHz.  Feed  it  into  the 
unit.  Put  a  scope  on  pin  9  of 
the  IC  on  the  6,62-MH2 
board  (L  +  R)  and  tune  the 
coils  for  maximum.  Back  the 
generator  down  below  limit- 
ing and  peak  again.  Do  the 
same  procedure  for  the 
other  module  (L—  R),  but  set 
the  generator  to  5.8  MHz. 

If  the  generator  can  be 
frequency-modulated  by  an 
internal  oscillator,  set  it  to 
±75-KHz  deviation  and  ad- 
just the  L299  coils  on  each 
module  for  the  cleanest 
waveform.  Depending  on 
the  particular  run  of 
PM-200S,  you  may  need  a  re- 
sistor across  L299  to  lower 
its  Q  a  small  amount.  A  THD 
analyzer  is  a  better  eyeball 
if  you  have  one.  Without  an 
analyzer,  you  are  stuck  with 
having  to  use  your  ear  to 
fine-tune  L299  for  minimum 
noise  and  distortion. 

While  we're  on  the  sub- 
ject, don't  expect  the  Music 
Box  to  play  very  well  if  your 
system  has  any  spark  lies. 
And  narrowing  the  receiver 
i-f  bandpass  doesn't  count, 
despite  the  picture  improve 
ment  you'll  likely  see.  It's 
what  you'll  hear  that  really 
counts.  The  first  time  a 
solid-color  field  is  displayed 
(wider  carrier  deviation), 
you'll  see  and  hear  what 
many  call  frizzies,  the  bane 
of  all  "near  threshold"  sys* 
terns.  Even  with  music,  noth- 
ing beats  a  good  LNA  and  a 
large  dish.  Nothing. 

At  this  point  vou  should 
be  able  to  connect  every- 
thing and  hear  pretty  good 
stereo.'  Use  headphones  to 
verify.  Some  of  the  music  is 
in  mono,  so  don't  worry  if 
your  first  blast  of  sound  is  in 
the  middle  of  your  head.  If 
you  used  5%  or  better 
resistors  on  the  op  amps, 
you  may  be  finished.  Other- 
wise, the  two  50k  pots  may 
need  adjustment  for  maxi- 
mum separation.  Tweak 
either    pot    for    best    aural 


62     73 Magazine  •  June,  1982 


Ltl^T 


W 


k 


FROMT 


it} 


¥■ 


HOI.E 


T 


L-R 


Lt« 


HtO   Sf^EAKCfV 


(c) 


A 


Ri&hT 


1 


FHOMT 


^ 


&  '*  A     A 


T 


^ 


L-R 


f /g.  3.  Evolution  of  four-  and 
five-channel  sound,  (a)  Ste- 
reo, (b)  quad,  and  (c)  five 
channel  system. 


separation  or  connect  the 
Music  Box  outputs  to  the 
horizontal  and  vertical  in- 
puts of  an  oscilloscope. 
Without  sweep,  you  can  ad* 
fust  the  detector  pots  for  a 
45-degree  angle  trace  on  the 
CRT  when  nnono  is  being 
transmitted.  You'll  see  a 
"ball  of  yarn''  display  when 
stereo  is  being  sent.  Of 
course,  you  can  always  ad- 
just for  the  most  sym- 
metrical jumble.  What  else 
would  one  do  for  rock  and 
roll? 

Next,  connect  the  speak- 
ers. Watch  phase  because  it 
is  everything  in  a  quad  set- 
up. If  you  are  unsure,  then 
first  place  a  1,5-volt  cell  mo- 
mentarily across  the  voice 
coil  of  each  speaker  and 
note  in  which  direction  the 
cone  moves.  Mark  the 
speaker  lead  with  a  +  when 
the  cell  polarity  causes  the 
cone  to  move  outward.  All 
this  is  arbitrary,  of  course, 
but  serves  to  give  you  a  ref- 
erence from  which  you  can 
work. 


AMP 


^ 


4> 


L-B 


LEFT 
REAR 


n-t. 


«EAR 


Fig,  4.  Hookup  for  quadra- 
phonic sound. 

Music  Bo9c  Bonus! 

Sending  the  sound  tracks 
in  stereo  was  a  pretty  good 
idea.  But  what  the  Warner 
people   didn't   option    was 

quadraphonic  sound  (at 
least  until  they  read  this]! 
And  the  little  Music  Box  can 
do  it.  Quad  sound?  Yeah.  .  . 
and  does  it  sound  neat!  And 
if  four  channels  don't  grab 
you,  then  how  about  five 
channels?  It's  just  sitting  up 
there  on  the  bird  waiting  for 
you  to  snatch  it! 

For  a  quick  trip  into  the 
history  behind  four-  and 
five-channel  sound,  see  the 
box.  To  get  quad,  just  take 
the  Music  Box's  L  — R  out- 
put,  run  it  through  a  power 
amplifier,  and  connect  two 


speakers  as  shown  in  Fig.  4 
Note  that  the  speakers  on 
the  amplifier's  output  are 
connected  in  parallel  but 
out  of  phase.  The  L  —  R  goes 
on  the  left  rear  as  you  face 
the  main  speakers,  The  R  —  L 
goes  on  the  right  rear.  Since 
the  rear  speakers  will  be  ra- 
diating only  ambience,  you 
don't  need  to  use  the  best 
that  money  can  buy.  Small 
bookshelf  units  work  fine. 

Setting  fevels  for  quad  is  a 
matter  of  taste,  The  ambi- 
ence effect  is  very  pro- 
nounced if  the  rear  levels 
are  high.  But  the  stereo  ef- 
fect is  reduced  somewhat 
depending  on  the  room.  This 
is  also  true  of  the  center 
channel.  Too  much  level 
and  separation  goes  away. 
As  a  rule,  start  your  ad- 
justments with  the  center 
and  rear  channels  about  6 
dB  softer  than  the  main  left 
and  right.  And.  .  .oh 
yes.  .  .remember  the  thresh- 
old of  pain  is  stiti  +  120  dB. 
But  it  may  be  less  with  rock 
and  rollfi 


«4.96  KD-44'- 

ParibDitc  Hetlectof  Kii 
"^  900MHI-2SGHZ 


A     low     CDBl, 

alternative  lo 
and  vSQis  44" 
piece    durable 


l^igh  quality 
snow   s^eds 

fjghsweight 
steef  const    tnciudes  feed 
horn  bracket,  pns-cuf  hard- 
ware dfOXfi  and  all  hafdwrne 
needad  tot  assembfv 
Excellant  for  waarher  sdt& 
lite  ^nd  1298  MHi  ejtperi- 


SOO  MHZ  COKVEfrrEH  KIT  ■«.« 

Ht  yw  'Aith  ^fi-UM-e  tonwartw    This  preamp  tjin  ttio  bt  uiKt  wiifi 
Olher  manuPacturflr's  boircts  fa*  iiTiprovJB<J  peflofm^nci 


VARI ABLi  POWEfl  SUPPLY t»M 


l-l--i?l-    +    'ii-i-n 


DiiUXE  nC»  MHZ  CONViRTTEfl  t(,IT 

utrtQ  mime*  <■  Ampiifitf  itnd  fio^dnli  CTvatBl-cOnirtiljad  Dscilhillor 


UV  tTATIONARV  POWER  $UPn.T. 

For  wsa  wiTf.  [>€<.>' ■■«  C>''<Mt^i*J 


•f-m  ■mm  ma 


P«>#Vife*HI    ■- 


Our  kl^t  aiio  comas  lr> 
i  2  It.  ■Ize  with  10  db 
gmin-  OnUY  I24.G0 


IIOII€iTllV$-1  KIT..... M.OftAifyf»i*0  ~w^ 

Fy  use  ocTwser  "imj  vC*  t 

WOOEL  TKVS-IRF  KIT TiW  ^^i5«rT«h«  99  3Q 


TEXAS  MICROTRONICS 


P.O.  SOX  uit# 

ARUNGTON,  TEXAS  7W13 

ai7-BeO-M40 


fr^32B 


TlflMft: 

Viss.  MasterCard 

Check.   Money  o-rder, 
and  CO  D   (Add  $2). 


Siftce  I9li6    ntii,    l^D    nas  :  j 

S)r&l&rriEF  Jo*  Q>Dup%  iJiC*'  as   .       --    J 
STORES   DOLLV  ***RTOW  a^  i^OfCtirta 
StiKhos.  mEil  no*  iliretts  their  ei.pcftn# 
f  u  the  amaiiHit  ratfio  t«Jd 


MICROPHONE  EQUALIZER 


49 


95     add  S3  00 


•Hlgtt  quafity  speech  audio 
•tncrease  talk  power,  lOdB! 
•Equalize  any  microphone 
*Be  proud  ol  yoyr  signal 
•tnstaMs  easily  in  mic  lead 
•Brighl^n  up  MC  50  mics 
«Pul  goQd  lows  m  D-104 


tiin: 


jUjlli 


HEIL,  LTD, 
Marjssa.  IL  622S7 
SI  8-295-3000 


,^t27 


MODEL  £0  2Q0 
Mo5i  fignnia  contajn  ejcessilwtf  (0*9.  very  few  highfl  Ih^t 
c^usc  thom  to  be  muddy  ^oundino  .hard  td  copjr,  lacking  mr- 
hcutflhon  ifid  prescencecil  fiibOance  [  il  t  sounds^.  The&ean 
noymg  conxiaic^ns  are  HQl  sorvea  b^  audit  process^n^   tr  . 
ansvbef  IS  EQUAL IZAT|0^4  Jusl  as  broddc^tert  ana  record rng 
siuQios  10  iheir  mw:  «f»#%  ih«  £Q  200  aHoas  yOu  to  ndyce 
tfisiartiem>.  add  ciesr^lf.  ^ivsc<mce  and  Hii&ilsnce 

The  cma  aiso  nas  a  T*a  ripoe  Ceft#r«iof  ci^cuii  9^  mstaiitng  1 
t««r  com«ionef^i5   you  d^n  pftHWfy  iw«e  fO«r  SSS  nafi^mitte^ 
T«i&  Tone  parts  Kit  |7  OO 


SATELLITE 
TV  SYSTEMS 

"COMPARE  OUR  QUALITY. 
PRICES  AND  SERV  ICE!" 

WE  MANUFACTURE: 

PARABOLJC  DISHES 
LNA  HOLDERS 
MOTORIZED  SYSTEMS 
DEMO  TR.AILERS 
POLAR  MOUNTS 
ALUMINUM  HORNS 

WE  STOCK: 

DRAKE 

WASHBURN 

AUTOMATION  TECH. 

KLM 

AVANTEK 

AMPLICA 

ALLIANCE 

CHAPARRAL 

AVCOM 

MODULATORS 

CABLE  &  CONNECTORS 

SWITCHES  &  HARDWARE 

CALL,  OR  WRITE  FOR  OLE 
LATEST  BROCHURE  AND 
PRICES, 

AUSTIN  C.  LEWIS 
901-784-2191 

LEWIS  CONSTRUCTION  CO. 
PO.  BOX  100 
HUMBOLDT.  TN   38343 

^•IN  BUSINESS  AT  THIS  LOCATION 

SINCE  I%4" 

^i52 


vS&m  Li^i  of  Atf^ef Users  on  ijage  T14 


73  Magazine  •  June.  19S2    33 


MICROWAVE  ANTENNAS&KITS 


MICROWAVE  HWNCtMVflnBR 

pMUBOuc  rnrnn    . 


MIGROWRVf  PRE  JIMP8 
HEAVY  DUn  TWPOOS 


•  MtROwm  Min  h  coMPomnTs 


'vtfi*'  source  o(  sufipbes  lor  \he  faste^i  growing  fieid 
of  comfTiynicatiCH^£  ^*&^e  t&  a  tow  cosi  entry  into  the 
lasanabng:  area  d(  microwave  technology  We  ottipf 
a  compieie  lune  of  antennas,  receivers,  pre-amps. 
power  sapp4^^.  elc- Qail  ch"  wnte  tof  cleiatls 


DATA  SERVICE  CO. 

3110  Evelyn  Street 
RoseviiJe.  MN  55113 
b1 2-636-9469 


SATELLITE  TELEVISION  FEED  HORN 


*i 


■HE  fill  ^BE  IIUS 


yi«d  with  i  PARAIDLIC  DISH  having  a  focal  lenetft  to 
diameUf  ritic  [f/Qj  .3  to  .4S 

FrequencjT  rariEe  3  30  GHi  to  4  90  BHi 
fiU  a  stanila({l  CPR  229  1lan|t  m  ths  lNA 

lBttBdac!ffr  iffer    SIDOO  Piitptid  USA 
llisterciTd     HoDEjf  ordej     Catliier  Chech 

For  zn  additional  charet  we  uriH  attapl  tbii  feed 
ham  to  four  LKA 


FRJEDSAM  TV  HARDWARE 

P.O*  BOX  31 1 

112  WEST  MAIN  STREET 

MARSH ALLVI LIE,  GEORGIA  31057 

912-967-2828  ^  tie 


gUAUn  MICROWAVE  SYSTEMS 


2100  TO  2600  MHz  ANTENNAS 
MINIMUM  34  db  GAIN  OR  GREATER 

Compiele  Syitem  ai  pictured  $14995 

(6  mofith  warranty ) 
Down  Converter  (Probe  MntdJ 

astfrrnbt^^  &  tested  $59.9S 

Down  Converter  (Chastt*  Mind.} 

assembled  &  tested  S59.9S 

Power  Supply,  assembled  &  tested       $49.95 
Down  Converter  PC  board, 

with  parts,  unassembled  It  Data         $39.95 
Data  InJormalion  (Plant)  $9.95 

-^        Send  c«»h,  check 
Of  money  order  lo: 

Ptiillips-Mi 
Bectronics 

Dept  SP-73     ^42\ 
P.O.  Box  33205 
Plioertix. 
Arizona  85067 

For  $p0ci9i  quantify 
pricing,  CO^D.  % 

— .^^^-—i^—        Mastercharge, 
ij^^*«fcir^^HBM       and  VfSA  cait 


($02^274-2885 


RADIOACTIVITY. 

531  WEST  COLUSS  DRlVt: 
CASPER,  WYOMING  82601 

FM  ATLAS  AND  STATION  DIRECTORY  (7th  Edition-/ 982) 

by  BRUCE  F,  EL  VING, 

Accurate  information  on  FM  broadcast,  booster  and  translator  stations,  $6.95 
Compiled  by  location  and  frequency  for  United  States  and  Canada  with  maps. 

TDK  cassette  tape  C- 1 80  for  third  party  record,  3  hour  capacity  $6.00 
TDK  continuous  loop  cassette  tape  for  announcements 
SO  second  $4.50        3  minute  $3,50        12  minute  $4.50  ^ 

PANASONIC  CT  5511  battery  portable  color  TV  receiver  and  video  monitor  $420 


315 


MM  HELP 


T  am  in  need  of  service  data 
for  a  HammarJund  HQ  100A, 
Hallicraftefs  WR  1500,  and  old 
Weston,  Jewel),  and  HIcKock 
lube  testers. 

Frank  Krantz 

100  Osage  Ave. 

Somerdale  NJ  06083 


f  need  plog-in  coils  for  a  Na- 
tional SW-3  receiver. 

Max  R.  Otto  WiLFF 
733  W.  Benton  St 

Iowa  City  lA  52240 

Does  anyone  l^now  how  to 
convert  a  little  transistor  broad- 


cast Al^  receiver  to  160  meters 
to  receive  code  for  QRP  work? 

Frank  Hennis  KA71WW 

1009  D»bb  St. 

Bremerton  WA  98310 

t  am  looking  for  a  Hallicraft- 
ers  LF/MF  tuner,  model  HA- 10. 

EdHeger  KA2HN0 

271  Henry  St_ 

Paramus  NJ  07652 


I  am  looking  tor  work  in  Ihe 
electronics  field  in  the  Knox- 
vHle-Chattanooga  Tist  area.  Ex- 
perience includes  digital  and  rf 
cifcuils.  I  have  a  First  Class 
Radiotelephone  license  with 
radar  endorsement  and  an  Extra 
class  amateur  Hcense, 

H.F.  Schnur 

8227  Rolling  Stone  Lane 

Ooltewah  TN  37363 


CORRECTIONS 


The  British  VHF  converter 
project  presented  in  the  April, 
1982,  issue  of  73  uses  a  doubie- 
slded  printed  board.  The  foil  pat- 
tern for  the  board's  top  (compo- 
nent)  side  was   inadvertently 

64    73  Magazine  •  JuneJ982 


omitted.  I!  is  reproduced  here  as 

Fig.  1.  Also,  the  crystal  XI,  R9. 

and  L4  junction  should  not  be 

connected  to  ground. 

Tim  Daniel  N8RK 
73  MaQszinw  Staff 


Fig.  1.  Fotf  pattern  for  top  side  of  the  VHF  converter  PCB. 


IHCMT. 


THE  LEADER  IN 
COMMUNICATIONS 


£^  C  O^  ^1 


ASTR0 150  $975.00 

MATCHING  POWER  SUPPLY  179.95 

MATCHING  ANTENNA  TUNER  189.95 

General  Frequency  Range 

160  Meter  Band  - 1 .8-2.4  MHzt 
80  Meter  Band -3.0-4.5  MHz 
40  Meter  Band -6.0-8.3  MHz 
20  Meter  Band -13.8-16.0  MHz 
15  Meter  Band -20.8-23.0  MHz 
10  Meter  Band -28.0-30.0  MHz^t 
tt  Model  150  only 
*  Model  151  only 


iacKi||> 


n 


[1 


C 


Z) 


7201  N.W.  12th  ST 
MIAMI,  FLORIDA  33126 
1-305-592-9685  •  1-305-763-ai7 

*    WE  ALSO  CARRY  MANY 
MARINE  &  AIRCRAFT  RADIO! 


HF/SSB 

PORTABLE 

RADIO  STATION 

100  WATT 
115/230V 

50/60  Hz  AC 

OR  12V  DC 

IS  AVAILABLE 


^^v>4^ 


DIPLOMAT150 


BATTERY  PACK  CHARGER 


G.S.C.  REGULATED 
Power  Supplies 


Model 
IV 
6-R 
10R 
20-R 
35-R 


List 

24.00 

71.00 

92.00 

1 1 6.00 

227.00 


Sale 

18.00 
55.00 
67.00 
87.00 
161.00 


U.S.  DISTRIBUTOR 

FOR  F9FT 
TONNA  ANTENNAS 

CALL  US 


Prices  Or  Specifications 

Are  Subject  To  Change 

Without  Notice 


BIRD  WATT  METERS  &  ACCESSORIES 
LARGEST  SELECTION  IN  THE  EAST 


HAL  Cornmunicaiions  Corp       MIRAGE  AMPLIFIERS 


1 

■BH 

■ 

^*  ".--^      ,^    jm  M 

■ 

4  -•:       ^  :r  ■ 

1 

A^f'l 

^  **.m 

1 

i^HH 

IHI 

FREEDOM  PHONE 
BEARCAT  SCANNERS 


THE  DRAKE  LINE 


1 

A 

1 

1/4    WAVE  MAG 

LIST  24.95 

N&G  PRICE  15.00 


BIRD  43  152.00 

All  Bird  Prod,  in  Stock 


f?fa^      J^ 


•IW 


ifH: 


^ 


25  Orchard  L^ne 

New  Canaan  CT  0^340 


Tune  In  the  World's  Tinderbox 

SWLing  from  Cairo  to  Kuwait 


The  assassination  of  An- 
war Sadat,  President  of 
Egypt  was  simpiv  the  latest, 
at  that  time,  of  a  whole 
series  of  "incidents"  in  this 
conflict-torn  area.  The  war- 
fare between  Israel  and 
Egypt  a  few  years  ago,  the 
fighting  between  Iraq  and 
Iran,  the  invasion  of  Afghan- 
istan by  the  USSR,  and  the 
ever-threatened  stability  of 
Saudi  Arabia,  Kuwait,  and 
other  Arab  oil-producing 
states  are  all  part  of  the  tur- 
bulent Middle  East  scene 
For  a  clear-cut,  direct,  day- 
by-day  picture  of  this  ex- 
plosive part  of  the  world, 
listen  to  your  shortwave 
radio.  All  the  countries  men- 
tioned above,  plus  others, 
have  daily  programs  in 
English  that  can  usually  be 


heard  welt  in  North  Amer- 
ica. And  you  will  find  it  in- 
teresting to  compare  the  dif- 
ferent viewpoints  of  these 
nations, 

Radio  Cairo  from  Egypt 
usually  has  a  pretty  good 
signal  into  North  America, 
Its  English  programs  can  be 
heard  at  2215-2345  CMT  on 
9805  kH^  and  at  02000330 
CMT  on  12.000  and  9.465 
kHz,  A  250-kW  and  a  100- 
kW  transmitter  are  all  the 
station  has.  Its  programs  al* 
ways  open  with  the  sound  of 
chimes  (sounding  suspi- 
ciously like  Big  Ben  in  Lon- 
don) and  the  words  from  a 
woman  announcer:  "This  is 
Cairo,  this  is  Cairo."  Fol- 
lowing this  is  a  ten-minute 
news  program.  Then  comes 
a  regular  pattern  of  music 


followed  by  a  discussion  of 
some  timely  topic,  usually 
related  to  the  Middle  East 
The  music  is  Middle  Eastern, 
reminiscent  of  Egyptian  bel- 
ly-dancing scenes  in  old 
movies.  The  music  goes  on 
for  about  ten  minutes  and 
then  for  15  minutes  you  hear 
talk.  Then  back  to  the  mu- 
sic, and  so  on  This  is  the  reg- 
ular  daily  program  format. 
However,  like  the  good 
broadcasters  they  are,  Radio 
Catro  is  not  afraid  to  break 
out  of  the  mold  if  the  occa- 
sion calls  for  it. 

If  you  had  been  listening 
to  Radio  Cairo  on  the  eve- 
ning that  Sadat  was  killed,  as 
I  was,  you  would  have  been 
in  for  a  most  interesting  ex- 
perience. As  soon  as  the  off  1- 
cial    announcement    of 


Sadat's  death  had  been 
made.  Radio  Cairo  discard- 
ed its  regular  format  and  put 
on  a  fascinating  program 
about  the  late  president. 
They  covered  his  rise  to 
fame  and  his  accomplish- 
ments while  president,  and 
then  switched  to  a  report  on 
the  background  of  his  suc- 
cessor, Hosni  Mubarak. 

To  me,  this  was  short* 
wave  radio  at  its  best.  Such 
experiences  give  the  listener 
the  opportunity  to  go  to  the 
sources  of  major  stories, 
wherever  in  the  world  they 
take  place,  and  to  get  on- 
the-spot  coverage  that  is 
usually  way  ahead  of  your 
local  radio  or  TV  news 
report. 

Perhaps  the  most  exten- 
sive broadcasting  job  in  the 


ALGERIA 


USSR. 


66     73  Magazine  •  June,  1982 


Middle  East  is  done  by  Isra- 
el. Kol  Israel,  the  vo!ce  of 
Israel's  External  Service, 
bearns   some  six  hours  of 

English-fanguage  programs 
into  North  America,  many 
of  them  very  popular  with 
regular  listeners. 

Broadcasting  in  Israel 
goes  back  to  the  days  when 
the  British  ruled  Palestine 
under  a  League  of  Nations 
mandate.  They  formed  the 
Palestine  Broadcasting  Ser- 
vice (PBS)  back  in  1936  and 
put  out  programs  in  English, 
Hebrew,  and  Arabic  The 
present  Kol  Israel  took  its 
bow  on  the  first  day  of  Isra- 
el's independence,  carrying 
Prime  Minister  David  Ben- 
Curion's  original  Declara- 
tion of  Indeperidence 
speech  live  on  May  14, 1948, 
from  the  Tel  Aviv  Municipal 
Museum  The  Hebrew 
broadcasting  staff  of  the 
PBS  joined  up  with  those 
who  had  been  broadcast- 
ing for  the  Jewish  under- 
ground to  form  a  nucleus  for 
the  original  Kol  Israel 
organization. 

In  1965,  a  Broadcasting 
Authority  Law  was  enacted 
that  gave  Kol  Israel  the 
same  status  that  is  enjoyed 
in  Great  Britain  by  the  BBC. 
That  is,  it  is  administered  by 
a  Board  of  Governors  acting 
as  an  independent  body  out- 
side of  direct  government 
control  The  executive  head 
is  the  Director-General  who 
is  appointed  by  the  govern- 
ment for  a  five-year  term 

About  two-thirds  of  the  Is- 
rael Broadcasting  Authori- 
ty's budget  is  revenue  from 
license  fees  of  domestic  lis- 
teners and  TV  viewers  The 
remainder  comes  from  fees 
charged  advertisers  for  com- 
mercials on  domestic  radio 
and  TV.  The  External  Ser- 
vice  also  gets  direct  grants 
from  the  government 

Kol  Israel  has  a  strong  sig- 
nal into  North  America  with 
four  300  kW  transmitters 
atmed  at  our  shores.  Broad- 
casts in  English  can  be  heard 
in  the  mornings,  afternoons, 
and  evenings.  The  last  is  the 
best  time  for  reception,  al- 


though afternoons  generally 
also  are  good.  Mornings  at 
1200-1230  GMT  are  usually 
not  the  best  for  reception 

In  the  evenings,  listen 
from  0000  to  0030  GMT, 
0100  to  01 30  GMT,  and  0200 
to  0225  GMT  on  one  of  the 
following  frequencies; 
15.583  kHz.  11  640  kHz,  or 
9.815  kHz.  Also  listen  from 
0500  GMT  to  051 5  GMT  on 
15105,  11.960,  11.638,  or 
9.815  kHz. 

In  the  mornings  at  1200, 
try  for  Kol  Israel  programs 
on  21 J60,  21  495.  or  17.612 
kHz  Sometimes  the  recef> 
tion  at  this  hour  is  unusually 
good,  but  it  is  problemati- 
cal, unlike  the  other  times  of 
broadcast 

From  2000  to  2030  GMT 
on  12.025.  11,960,  9  815, 
and  11.638  kHz,  reception 
IS  usually  strong.  So,  too,  is 
it  from  2230  to  2300  GMT 
on  1 1 .960, 1 1 ,638,  and  9  81 5 
kHz. 

All  Kol  Israel  programs 
begin  with  a  five-minute 
news  summary  and  then  go 
into  their  regular  program- 
ming, which  is  different 
each  day. 

Sundays.  "Calling  All  Lis- 
teners" is  Radio  Israel's  pop- 
ular DX  program  which 
gives  up-to-date  information 
on  frequency  changes  for 
Stations  in  the  Middle  East 
and  also  Kol  Israel  program 
details  for  the  week  This 
program  extends  into  Mon- 
day GMT  times  (0100.  0200, 
etc.) 

Mondays .  "Program 
Parade"  gives  forthcoming 
program  details,  and  then 
comes  "This  Land/'  which  is 
particularly  aimed  at  people 
interested  in  touring  Is- 
rael Following  this  is ''Spec- 
trum/'which  reviews  Israeli 
scientific  developments, 

Tuesday.  "Israel  Mosaic" 
gives  the  listener  interest- 
ing facts  about  life  in  that 
country.  "Pop  Sound"  of- 
fers music,  and  then  comes 
^'Personally  Speaking/'  a 
program  with  guest 
commentators. 

Wec/nesda  ys.  "Israel 
Forum"  is  the  big  program 


Want  Q5L  Cards  or  Station  Prof  rams? 
Here  are  the  addresses  of  Middle  East  broadcasters: 


Radio  Afghanistan 
PO  Box  544 
Kabul 
Afghanistan 

Voice  of  Islamic  Republic 
Box  41-3641 
Tehran,  Iran 


Radio  Cairo 
PO  Box  1186 
Cairo,  Egypt 


Radio  Baghdad 
[raqi  Broadcasting 
Saftbiya 


Israel  Broadcasting  Authority 

Baghdad.  Iraq 
Kuwait  Broadcasting 

PO  Box  1082 

PO  Box  397 

Jerusalem.  Israel 

Kuwait 

Broadcasting  Service  of  the 

UAE  Radio 

Kingdom  of  Saudi  Arabia 

Dubai 

Ministry  of  Information 

PO  Box  637 

Riyadh 

Abu  DhabF 

Klrtgdom  of  Saudf  Arabia 

United  Arab  Emirates 

of  the  day  and  offers  the 
listener  some  lively  discus- 
sions about  people  and 
politics. 

Thursdays.  'Time  Out" 
offers  interesting  feature 
stories  about  life  in  Israel, 

Fridays.  "Music  from 
Israel/' 

SaturdaY$.  "Israel  This 
Week"  is  a  review  of  current 
events  of  the  past  six  days 

Compared  to  Israel,  the 
other  Middle  East  broad- 
casters are,  for  the  most 
part,  inferior  While  some 
have  good  signals,  they  are 
not  on  the  air  very  much  and 
their  programming  is,  by 
comparison  to  Kol  Israel, 
somewhat  crude.  However, 
if  you  are  not  listening  just 
for  enjoyment,  as  you  might 
with  the  BBC  or  other  West- 
ern stations,  but  to  get  infor- 
mation and  various  view- 
points, these  other  Middle 
East  stations  do  give 
you  that 

Radio  Kuwait  is  an  in- 
teresting station  to  listen  to. 
This  little  country— about 
the  size  of  Israel  but  with 
only  half  as  many 
people  — has  some  15%  of 
the  world's  oil  reserves.  Oil 
pays  for  (ust  about 
everything  there  — free 
medical  care,  education, 
and  social  security.  Best  of 
all  there  are  no  taxes! 


Kuwait,  as  might  be  ex- 
pected,     has      modern 

Western  technology  work- 
ing for  it,  and  this  includes 
shortwave  transmitters  in 
which  there  are  four  250-kW 
and  two  500-kw  units.  They 
have  a  pretty  good  signal  in- 
to the  US  from  1 800  to  2100 
GMT  every  day  They  use 
only  one  frequency— 11  675 
kHz  — but  the  equipment  is 
good  enough  to  make  this 
almost  always  a  good  one 
for  receivers  here  in  this 
country. 

A   typical   program   from 
Kuwait  goes  like  this: 
—1800  GMT -Station  Iden- 
tification;   music    (Arab 
style); 

--1830    CMT-1  5  minute 
talk  on  some  current  event 
in  the  Middle  East  by  young 
lady; 
—1845  CMT  — More  music; 

—  1900  GMT  — Western- 
style  music; 

—1930  GMT  — Review  of 
the  week; 

—  2000  CMT -Music  [Ara- 
bic); and 

—  2030  CMT  — Discussion 
of  economics  by  a  man. 

Listening  to  Radio  Kuwait 
is  similar  to  sticking  with 
Radio  Cairo.  It's  not  easy  to 
stay  glued  to  the  receiver  on 
stations  like  these  unless 
somethmg  special  is  hap- 
pening in  the  area.  This,  of 
course,  is  very  likely  these 

73 Magazine  •  June.  1982     67 


ii 


Be  A  Better 

Listener. 


Take  command  of  your 
scanner  or  shorf  wave 
receiver.  Learn  where 
fo  fook  and  when  to 
listen  with  heip  from 
MONlTORiNG     TIMES. 


lUuc  llin   9  Drug  Smuggling  Communications 
•  Police  Action    •  Space  Shuttle  support 
•  Clandestine  Broadcasts    •  Spy  Networks 
•  Military  Air-To-Ground    •  Ship-To-Shore  Links 

..And  Much,  Much  More!   ;. 

Published  bi-morithly,  it^s  the  only 
broad-spectrum  publication  written 
for  the  serious  listener. 

For  a  FREE  sample 
f^suep  please  wnte: 

mQmtohim,  times 

140  D09  Brfliicb  Road,  Bresstown,  N,C.  28902 


dav5,  with  the  Middle  East 
set  to  have  an  explosion  of 
some  kind  at  any  time  Thus, 
it  makes  sense  to  know 
where  to  find  stations  like 
Radio  Kuwait  on  your  dial 
and  to  check  into  them  from 
time  to  time. 

A  real  disappointment  is 
Saudi  Arabia.  Here  is  one  of 
the  largest  Middle  East 
countries,  with  a  population 
of  9,290.000  and  geograph- 
ic a  Uy  a  quarter  the  size  of 
the  US.  Lfke  Kuwait,  it  is  oil- 
rich  Unlike  Kuwait,  which 
has  a  literacy  rate  of  over 
60%,  Saudi  Arabia  has  a 
rate  of  only  15%, 

The  Saudis  have  three 
shortwave  transmitters— a 
SO-,  a  10O-,  and  a  350-kW 
They  should  spend  a  couple 
of  bucks  and  buy  more  or 
better  ones  Reception  is  not 
very  good  here  in  the  US 
They  broadcast  from 
1800-2100  CMT  on  11  856  or 
7  210  kHz, 

When  you  do  tune  them 
in,  the  program  starts  with  a 

68     73MagazmB  •  June,  1982 


man  saying,  "This  is  Radio 
leddah,  the  broadcasting 
service  of  the  Kingdom  of 
Saudi  Arabia."  The  program 
that  follows  is  a  mixture  of 
Middle  Eastern  music  and 
talk,  the  latter  primarily  ex- 
plaining positions  on  oil 
prices,  purchases  of  modern 
arms  from  the  US,  etc. 
Again,  while  not  the  most 
entertaining  station  to  listen 
to,  it  could  be  of  great  in- 
terest should  some  event 
take  place  in  that  part  of 
the  world. 

A  much  more  intriguing 
station  to  listen  to  is  UAE 
Radio  in  Dubai,  in  the 
United  Arab  Emirates.  Here 
is  a  little  country  that  I  had 
never  heard  of  before  be^ 
coming  a  shortwave  radio 
listener.  It  has  a  population 
of  less  than  a  million  people 
and  is  roughly  the  size  of 
Maine.  However,  oil  rev- 
enues give  the  UAE  one  of 
the  highest  per  capita  gross 
national  products  m  the 
world  This  little  country 
was   a    British  protectorate 


until  1971— another  reason 
for  its  obscurity. 

From  a  broadcasting 
standpoint,  UAE  Radio  is  a 
pleasant  surprise.  It  has 
three  30OkW  transmitters 
which  seem  to  reach  us  here 
in  North  America  extremely 
well  Its  English  programs 
can  be  heard  twice  daily,  at 
0330^3357  CMT  on  17775 
and  9.590  kHz,  and  from 
1610-1650  CMT  on  21  695 
and  17  710  kHz. 

After  station  identifica- 
tion by  a  young  lady  who 
sounds  as  though  she  has 
been  educated  in  London, 
England,  UAE  Radio  offers 
not  the  news,  as  is  the  usual 
shortwave  broadcasting 
technique,  but  a  feature 
story  Recently/for  example, 
it  had  an  interesting 
1 5-minute  talk  on  the  history 
of  the  trade  of  that  geo- 
graphical area  with  China 
during  the  time  of  the  Cru- 
sades. Following  this  came 
ten  minutes  of  music— not 
Arabic  music,  but  the  kind 
we  hear  on  US  FM  "beauti- 
ful music"  stations.  After 
this  came  the  news. 

News  is  done  in  BBC 
style.  That  is.  first  they  give 
you  the  headlines,  then  the 

detailed  stories,  and  then  a 
repeat  of  the  headlines.  You 
can  see  the  British  influence 
in  their  broadcasting  With 
the  exception  of  Israel,  UAE 
Radio  appears  to  be  the 
most  westernized  of  alt  the 
Middle  East  stations. 

Another  pleasant  surprise 
in  Middle  East  stations  is 
Radio  Baghdad  from  Iraq. 
This  station  also  has  very 
good  programs,  and  even 
though  it  is  reported  to  have 
only  a  single  250-kW  trans- 
mitter, it  comes  in  with  a 
pretty  strong  signal  to  North 
America.  A  typical  program 
starts  with  15  minutes  of 
news  followed  by  about  five 
minutes  of  music  (Arab 
style)  Next  comes  a  five- 
minute  editorial  (perhaps  on 
the  war  with  Iran  and  why 
thev  are  fighting),  followed 
by  more  music.  Then 
another  talk  and  more 
music. 


While  it  may  sound  rather 
boring,  the  fact  of  the  mat* 
tf  r  is  that  the  talks  are  well 

thought  out  and  very  welt 
delivered.  It  is  good  listen- 
ing if  you  are  at  all  interest- 
ed in  what  is  going  on  in  the 
Middle  East 

Iraq  is  not  a  large  country 
(a  little  bigger  than  Califor- 
r>ia  in  size  and  with  a  popu- 
lation of  12,000,0001  but  it 
is  one  of  the  key  nations  in 
the  area  and.  unlike  some, 
has  a  pretty  good  record  for 
stability  In  other  words,  its 
attitudes  and  thinking  wilt 
be  important  in  future 
developments  in  the  Middle 
East  You  can  hear  Radio 
Baghdad  every  day  at 
2130-2225  GMT  on  9.745 
kHz  and  at  03000335  on 
21.585  kHz. 

The  other  countries  in  the 
area  are  an  "iffy"  proposi- 
tion as  far  as  reception  is 
concerned  Iran,  three  times 
the  size  of  Iraq  in  both  pop- 
ulation and  area,  can  often 
be  heard  at  1930-2030  CMT 
on  9,022  kHz.  Programs  are 
not  exactly  award  winners, 
but  you  do  get  the  Iranian 
point  of  view. 

Afghanistan  can  usually 
be  heard  at  1900-1930  GMT 
on  15.077  — but  not  very 
well.  Algeria  can  sometimes 
be  heard  at  2100-2130  GMT 
on  25  700  or  15  215  kHz 
Some  listeners  have  heard 
Lebanon  on  11  790  or  n  860 
kHz  at  0230-0300  GMT.  DX- 
ers  have  caught  additional 
Middle  East  countries,  but 
not  with  programs  in 
English 

However,  for  those  of  you 
who  want  to  keep  up  with 
what  IS  going  on  in  that  part 
of  the  world,  you  have  a 
pretty  wide  choice  of  sta- 
tions with  good  signals  and 
fairly  good  programs  — 
Israel,  Egypt,  UAE  Radio, 
Kuwait,  and  Iraq,  This 
assortment  gives  you  a  good 
balance  of  opinions.  After  a 
few  months  of  listening  to 
this  array  of  programs,  youll 
be  the  best-informed  guy  or 
girl  on  the  block  about  the 
Middle  East.B 


Intrcwdudng  incredible  tuning  accuracy  at  an  incredibly 
affordable  price:  The  Command  Series  RF-3100 
3Vband  AM/FM  SW  receiver*  No 
other  shortwave  receiver  brings  in 
PLL  quartz  synthesized  tuning  and 
all-band  digital  readout  for  as  !ow  a 
price.  ^  The  tuner  tracks  and  "locks*" 
onto  your  signal,  and  the  5-digit  dis- 
play shows  exactly  what  frequency 
youYeon. 

There  are  other  ways  the  RF'3100 
commands  the  ain^/ays;  It  can  travel 
the  full  length  of  the  shortwave  band 
(thats  1,6  to  30  MHz).  It  eliminates  interference  when 
stations  overlap  by  narrowing  the  broadcast  band. 
It  improves  reception  in  strong  signal  areas  with  RF 
Gain  Control.  And  the  RF-3100  catches  Morse 


.1  u  I  J  r 


RF-6300    S-band  AM  FM  SW 


communications  accurately  with  BFO  Pitch  Control. 

Want  to  bring  in  your  favorite  programs  without  lifting 

a  finger?  Then  consider  the  Panasonic 
RF-6300  8~band  AM  FM  SW  receiver 
(1 ,6  to  30  MHz)  has  microcomputerized 
preset  pushbutton  tuning,  for  program- 
ming 12  different  broadcasts,  or  the 
same  broadcast  12  days  in  a  row.  Auto- 
matically It  even  has  a  quartz  alarm 
clock  that  turns  the  radio  on  and  off  to 
play  your  favorite  broadcasts. 

The  Command  Series  RF-3100  and 
RF-6300.  Two  more  ways  to  roam  the 
globe  at  the  speed  of  sound.  Only  from  Panasonic. 

•SfKirtwave  tecepl^on  will  vary  with  antenna,  weather  condilkons,  operators 
geographic  location  ar^  other  factors.  An  outside  antenna  may  be  required  for 
maximum  shortvvave  reception. 

^Based  on  a  compaftson  of  suggested  teiai\  prices, 


This  Panasonic  Command  Series" 

shortwave  receiver  brings  the  state  of  the  art 

closer  to  the  state  of  your  podcetboolc. 


iBnjj^^^ 


a»      -  -  '  '■•^R^ 


^^-nr^^r-.— TT-r  -  .I'.i."  ..    .  .. 


ftJNHD  14XtCT0A 


D 


!  HI  I  fc'r'J-i  ±t 


vauMi 


%m  mr^ititm 


(fTO* 


With  PLL  Quartz  Synthesized  Tuning  and  Digital  Frequency  Readout 


3»  Panasonic. 

just  slightly  ahead  of  our  time. . 


^380 


ELECTRONICS 

61  Lowell  Rd,,  Hudson,  N.H.  03051 

9-6  Oaily  (603)  883-5005  12-5  Sunday 

-..-TOWERa...ROTORa.,.ANTENNAS,,„COAX„„HF  XCVRS,... 
Oy«r  1000  different  amateur  r&dio  itemt  are  listed  on  these  two 
fngv,  ond  most  of  them  are  in  rtock  !  Open  SEVEN  DAYSsvtry 
iMok  and  NO  SALES  TAX  in  H&w  Hampihire.  You'll  find  th« 
our  DISCOUNT  PRICES  sm  h»rd  to  b«at  and  our  FRIENDLY 
SERVICE  is  ^cond  to  non«,  WVe'r«  only  30  mirts  from  Rt«  128  in 
BOSTON  via  Rte  3,  and  only  45  Minf  from  LOGAN  International 
Airport  in  .    If  you  cannot  visit  us  then  try  our  FAST  mail 

order  service.  Most  mail  and  PHONE  orders  ar^  shipped  in  one 
cfay.    Send  $1  for  our  ENLARGED  CATALOG,  free  with  orders, 

"prs&PiiiTO-TRigc 


m.-*^ 


EH»      tf-  ■«   fMr  ■ 


n-iv    tiM^Mti  Huiow  tmr^xtf  n  i-L-=* 
*%   IT     mm     i-p»  #v   jBv  TQ  14  «-»* 

M-z^9     am   -ifliKi   PC  m-Ut  rvi  mt-tmi 

11     ISl-IS      -I   l-ca     l(*IkP.l     ME    hLLB   P^   !■   P^IJ 

«-«l      itMUilli  4  nnJI  #1*  H«j 


1,K 

S.SL 

#1*1: 


*-1 


UV^ 


kit.*" 
ilr.*t 

!"-*■ 

mi«« 

HbpXM 

'  LflM  «arhi«[Ti>  rp  kmpI   MinwtTi  l>*.Mi 

M#iiit>H  **  mama  somiii  jiv  t* 


^-f^H 


■I  3S>    ^  tap*   -.tit.  mm  memm  Mltm.*  PE^^E(^ 

Ml- 391       If    !■»    l^-llLY    »l  ri*   *LW.    mOH 

IJI-II9       HI.  ID    ITATI     IW4Pr||»    ir^nC    m    nnlK    hHW 


fm 


■  t«.ka 


19.^ 


pv^t     laaic  «>*aBi4  i^atn  ■i.d^  iita 
rr-i     SHun  iMkii;  *«'  1* li w  DBB« 

ttf    LA      *fc  111    7.1~l«   ■** 

J:»-^      MLJM    fe«-9   ^    pllli-^v    urn 


I»-n 


•i*^'# 


tTrK 

■■»> 


»T.HD 


^<..KDTnaf4i 


a- 1     Dvar'tP*  CMtlt  m^  Ml 

1-H  «£   aw  ■ItfMTtlUI 


thp 


JUU 


(ivq 

pwwtft 

tm4i  lUHri 

■5^ 

1 

n 

t«. 

J» 

«•» 

m 

H 

i» 

Ul 

fl» 

.*,t[H 

^* 

^1 

Hi 

hi 

iri«i4Mi 

1(>A 

ii)t 

lOD 

tm 

Z^^itH 

^4 

J^i 

?\0 

i%t 

^lifcttlt 

*ii« 

kJ^tl 

MX 

Wp 

y» 

HU«t4tri 

lam 

iniM 

kh: 

%wt> 

iCDf 

^V^Altv 

tvm 

/Mw 

/wf 

SS 

jyn 

^CD^Mft 

K»n 

vn-* 

sooi 

Mn 

■Cqih 

ItUfA 

lamc 

N9V> 

itnd 

i'USwfttih 

fVSN 

^40D^«ii 

unMM 

CUSlMJOft 


«mi     1  k.  ■■ 

P 

w 

L9-3CV^      k9   IVrpMI    I    HJIVMT    WJH 

LB^aCb     kr  P*A*MI  1  tliMMr  Hap 


*-.,•? 


FF*r 

!?■. 

II*. 

ii*. 

■¥<• 


LiM.^e 


T4 


?li»       !!•<-[■«   IWr    I*    U-SI^MT  «« 

II'IFI'      LM.S'^M    oHf    14    EUI«H7    HSP  iAi 

44*} -Kf      m  fc-Mlll'    in   >iVt    I«  4MI  •IV   llM'll*!'  TV 


n, 

*T.. 


.•^;*'      « 


Ek".* 


[ICOM 


**    ■»       l*T*t|    V*-i   «*    TH-T 
*H-T       V£Hf.tM    ^|>l     I-U3!#: 
*»-'       hCpIl^    P»l.p1     l-l*    TtT'/ 

TDTT      DVhMtLL    ECAl    'NIC    FtW    FIT-t 
rOJ}      14'  ''i->    ItaRVIlIX   KIT 

MM  I  lit  nwun.  in  T9-1 

•KII-H  |IPI|.IL  iU  Ik-r 

li^M    ani^  b.M^iw  PEB  Ei-r 


*l 

M 

It 

■se 

1* 

4<i 

««l* 

«> 

*t 

» 

n 

mi 

rt 

a» 

*f 

«« 

«« 

HJ 

4^H 


.V 


•?T,1 


l^rW 


L#-«     4*  MVl4   til 

«4  #^«I.tt*  PV    1« 

■v^n    Ti  ihPi  Phpa  PUB!  F31.TIP  nv  iv  am 


■Pl^ti     WJiBii  pwm   WL^iiH  PiB  miM  I  (HmprM 


1P. 
li. 


■as.K 


H:i4MTni:kf>4ac:i 


tllV   P«B   tUi  «V*.«« 

—  -^T  -    -■    ai--|  Iff  -■  rfciiriim       ii«*.TT 

M  ^kff   mM^K    ir**   -4^    a  i.te^ 


fU 


IW.I 


^liT- 


■>v  vrr  AV  I  lAi^« 


T^ 


■19   lir  *V   J    l«+>lli 
t[*9  rit   ***    I    1*^1 
m   *}t  •!■   *  *|4«^I 


-n       I3»-79fe   fHJ    II 

tit    tmt   *■  liu^aStt  MJH 
'II      t**   IftM    tt   RWDMHT   Wiw 
■fli-iMi     Jin>)iti  iwi  ■]■*!]  lUHSiP 
Ml^M'P     *aa-tYfr  Mil  iiliK]  pm^p 

M33     ??1T       *Jf    Mil    J^^   ||Jp|»qT    TWtffT 
M4-1      M   -IMT    1  ILnVHT   ^Ufl- 
^Di-«     Wi  'ht   9  ||.|l«^  Mm 


»*.  k  44^Ma  '•tfkricB. 

m  PT'  »w  i 

mr  «il  FH  I  aq^-it 


;p«.9 

L^*^9 


*«.«« 


M. 


ICt^B 
II.SD 


LXlwM 


m  -4« 


i*-*4 


»i.«i 


liP-pat     t**  pH 
9«i-*p*     t**  pl-* 


UA  tWM 


1*.. 


□W931     HWaML   VlfCIBH  V  EIH-Mb} 

tm/f^    HI 'IB   CVH   WI;D1,E    Lk&'il    arPV 
|ilP^*V<    PqTIH'   CIE^   NEXIM.EI    U3    PTNi 

IMj'Ptitt  nr*  ejDBa  •^j.bu   L-u-rtu  Hit 
HiniLD   PC^lwm  >iLn» 

■twri  H««i^i,  nic 

[■•-]:   ^9    p«j«9rr    iVfU    SUPL    i«KA1 


■*.90 

i'94.3a 

l*.J.9D 

I1-3P 

S-'K 


■  k.1.  ■« 


win-**'  [3  Buiia 
»T  amj  *trk  mem. 

ft.  ;?ites    itcpi  arji^ta;  k  bWlI  ''1^  ni^^p  ■ 
■Hit    *+v-iii3i»*fT  latv  mK  *  tm  a  TIM 


CQAji     tsu^mt-^w 


SOI      4  pi    l».1iu    I^Pt4~4iV  MffH   DQlf 

-Lf  1:9  Pi  ^'Mfci  «fl«L.Hi  ktFh^  ma 
:^  K  Pit  >^  mi  *i»k>ntt  KFh  Dwa 
Hd     9k  Wt  if-tfel  ilinp  IVB*  K-^xi  IP 

91^     lOv  pt  m  ifci  Mii<h.>-B«  iinit 

ifil       1  Pr  Itpaj   M.vv^*    BITv   El^ 

»t  *■ 

:-£BV      ■■!   PT   f  B 

l-ina     fciii  rr  t  I 


i»i.»ll. 


NikAM' 


AiVl-9 


t^l  1 
TTL9 


I  IB. SO 
Jl-Dij- 


9..  SD 

II.K 
M-X 
3lr3fi 

9.91 


tm^4*f 

•*,» 

K.It^ 

mm 

■kW 

HLi.iHLai    «/!  ^u«  I  pna  rapa  \jp  m 

0«^I44      iPPi*    CIU^  IW*^  ^WT    1^9    M    rrUP 

[A<-iiL#     I  '«i4i  fm.riw^  ■jtw  nit^i  I  tp  hU-ta' 
Df'-BC     ipwia  GH-ikCjn  rin^  tih**   i  ip  pvlhI 
pk-i-M^    4H  ■H'lrH  fep^  VT-PtiiH  nn  iiicwi   l  m^*^ 

tC^-i  tlDtl44    brTrCP   KLHT    3.''P    -<    74    PhPHMi 

P«''|  PVli1l.t    to*     rCLWT    S^9    X    34    Tl«ll^e 

193.  ■  tl.y    MNr    H'l>r  PiflHn   nOlPII'    1^    fMIBWn 

*ti-M.  SP'    nn*l    rH    ll,t«>4II   MOUlT    MP    AMtlllVfe 

i9^i«    ^^  <«itp  niBPWMii 
p«*iii    14  «ru  np^TW 

■M-  II      »  4T«»  VMIiknB 
IVF9>  wn% 

■I 


»..'ia 


4».'«1B      ^  MTV 


I  v. 


^JANEL 

LABORATORIES 


3 


l+4f4 
HWfJ 


t  HUM  UM  WJI 
Hi  «1^  Hffi^iS 

I   pTP   ^cav  Wftljt.   311   mi   NOIHI   P|| 

I  D  4iTm   ^ni^  TP*  Mi   441 1 M  li  B^ 
III  imi  PMipnp  41  AKhc 
I  nil  nH.Hirii  >4  4nvr 
llu  iwr  vvPB.[[h  pnci^^  pi  phm 

LSI   1«MHJ[N    hPEHIV-  A^  4K^** 

I    III   <HJ    NT,|:|e    '[D    1-31   •MJ    IIMttfeH    rr    ClU 


l#vl* 

IldH 
ii.im 


Ju      P^IUUKM     FIl-TEn* 


t^«t4T     Mk  Mv  LIH  . 

E-io^    I  ms^ASa^  LE 

C-«M.     4  iK1|i»  ^ 

f4il-*<k      1   I9PET|{M  It 

£.^-|iu  1 1     -f*^  Mb*  •« 


b.lHL  ^iL*#n    tai 


I  ill 


!*.» 


fP-W 


EL.: 


^KENWOOD 


■«  I 

I*  miflk  PCl9   EIB   txai-da 
W*lTh   ^^B  9]>l>  4P«I 


«Mp 


I  ^ 


Mjjcttpii  I  ^iL 

(■CM   4i!TM    *^ 
-rP   i«iJLl    Ttrw   IB9(C 
fT  WS   FM   fa-  1^ 


.iprif  hint  i9  I  hi 


TWT'J**     PI9I1 

ll^.lM      HP 

*T-i3v     M>HwM  TuCh  rnt  n-m 

HR-irm     HGBiLI   BUGKer  rm  T9-i» 

i-l-in      bIBI   PUPP^V   PDA    I-*- Ho   iJ.#v 

»   iiHHi     a^  w;m  piHiTfct,  s;ih.i4i   »pa«HJ 

h 'ti>n     PirppfwiL   vwKcn  rn  i»-L:pje 

T4.-4JJ>     l4^'i«  ^Ttp  Lcmw  w  p  a^^tr 

VI-11J       iril'lZM   40h|TT1M     MWI    iT»* 

•»  <1K      IW  MJ   £k   riiTTl   POP   •V-ftH    F«H;   »p 

Ti-PB9E»     rte  k-j  •  1.1  TIP 

■kHiK     f'qpl  epf^lircp  '»-Kmj^»>itat|i.gl 

■v-^^     i.Vi*  ^  rCi.T5»  P^  iV-^afaM 


•*«.^ 

■»t.«f 

n9w^ 

«H>1» 

^.t« 

t^-W 

i»*^^ 

I9V^^ 

ri  _vi 

1»p,« 

iTt^fll 

TJi,*S 

^.M 

*n.^ 

«I*.W 

Mt.n 

ttP-pi 

HC 


h     .  «««  ite  f.A  at  t  I'Nll 

lit.    a  rtTii  a»  ^FrTi  *n  •41"  pw*  t.  Ir-'p 


]# 


IB  1 


ym'p   Fv  n  »>lf   **h   '^  ^11    I] 

i  *T9  imiLX  ^B  F'k  n  pv  i^ii  mE 

tMI      PiMTR    Nf^TlHXa:    KWIlE    iT>* 

pa     I  inn  amcrF  -w.'Itcu  M^* 
PJll      LL3H  H[1>I  telIim   icp^ 
■l^n     I  tiTP  ■»  POIIPHLR 
■Ml     «1MH*|  HW  Ptn<aB,p 
1HI     1  ATI  pa 

11       IT    BJTL.'i 

pa     MT  m.w*-Lf  Fl»  HIP 

I  la    li^tP    Lbk«|tp   P9    WiP 
t:i       WP    IUPC4   CIUPIIBB  fit    It^ll 

II  t^-m  *ia 

-T    «n  1*  id'^vi'  P'ica  ri#  lie  -1ft 

'«     in   1^  *pcp  1^  B-M. 


■ppp  ini 

IHI.1S 
a3T  «w 


\».' 


i^H.Wl 

a*  ^t 

l»t,tin 


rP  >» 

rJ  • 


4  H- 


*.»■»•■      i;<_   ^^ 

*i"M    ap  « U.IH  pitp  -^r^ 

«i,-«A     iHi  J   i|,»«i:  in*  'Kna  fV  ft* 

ri  -^      Pl^n    |3I   FLLTE*.   P^B    m 

pi  ^fOy      £U   4I1B'TG  fTLIEV   mP    vto    4  Hli|   4 

Hit-tM     W*  f»rT   lUII^idl'lt   JptTtHilttf^ 


F'lUUKI 


Dnh'-  m 


Tl-#DD      RI4   P|,K;i|aM   .n   kER   i^JrPtl 
S-'iH}     .  II  rcoMHUix  Mta  cnmiH'inw'p   <ii>p> 
-b-pfi*     ittfuvi   mua  lcdic<  iT'P'-n'iPf  i«i.i).>'Pi4iik.z 

fi.as,>     M«iHjPimTofc«    lL-P    ►    ►■"■ft    11    NMaMP   rH 
CPU       -~-~    BUN  ll)C40' .P*  1 1    Pft    LMll^lll 
Pdt'lll      MttERT    Ol^^BI    -h   l<l|4riMn    P  tn    ■OA'm 

n*   apt  utWT 

■«    4«      «T*I   dB.TaqK   Pl^H     Pita    lAf    *P    -HMI 

piH    m  n^HL  II 
•■J^  19     19-  imr  fjii^mw 


[Ai4D 

l*«.l«- 


WP- 


*«.lli 
1«  IP 

11*  w 


MP 
■  it.tn 

rir.fp 

»4,lP 
lU.H 


liit.1 


Si. 


hg-gaM 


MV— I 


tTAii 


IP  I 

tiMirt    A  fi.pip»r   iiri-flpwun 

IHJIII       JpW^     r>«:iVIEn>[P>1' 
tMtVrU      J   pLM4V|Tt    Ip 
BtttfrfV^      I  U-UBHT    l;ir-r>i 
laVm     4.  iklMM^   «a   PVTpl 
rttlM    a  n-piviT  1 B  ■«  rpp 

1-P1PW       1  ILBBHT    IJ]   1«ttl 

iH^p*   *  n.u«p* 


11    *tT 


K.t*mmM  nii- 
rllMn  iPH 


iil.lft 


lii. 

*rp. 


*» 
H 
M 


13 


(••I 


111. Ml 
iMt.M 


ItLtP 
U.lli 

UrIP 


<*■■ 


?P 


ll  M^   «j1|PpTCii  «tT  VFBl 

to-lsa  nm  pivi^^v  iipvu  pn  ■ipiuji^ii'i  i^ 
■k-  IPC  -PHH  aiiPikjPT  PBtuJ  rim  ivun  vflLn 


K«l'P4W<llC»IV      VMP^ 


tR-'tlH       iPtfP    PW   4»   UHHTTTl    19    rd>   PltfRllY 

«Pi-?    PC  ttWLf  PEP  iP-fikia  in  mnc  tivte,  f  m*- 
4P»^i?    ic  m^t  pv  ftH  ^-:«9ta  fj  vct  ll  m^t 
Ti-piiPM     m^  iipjtw'FH  tt**  i*«<»p  rt  Witt! 
tH'«il»    pp  JIPIW9  ^/n  raiu  ta^  h-i.; 
^^'  Ift     lii(^«pto   ami  m  n.-vKiopiM 

nk-PTVir'     eoHCT  jm  f  «ip  t  ncp- 
IP  lit 


111*. 


*'  *i 

pip.  IP 
1t^«« 


ipq.Si. 

19,  3U 

T4.sa 
PlH.ta 

P|    i* 
■I -Id 

lU.M 


I]   «P 


1,1 
1.1 


*Np.** 

jipi.»a 
JIP.4 

lJ.*.-»9 


»*.*» 


ni.'^ 

i"»t.  »)i 

Ina.h' 

IM.l* 


irt.w 

j«.«i> 

l-pp.p"- 


pii  Pt 


111..: 


IliBtl.f      liPP  4»TTi    ID..  19  nnii  tittt    I'  IPM 
fei»-9      j^N    P>-1.9   HIP   ar  UBi    fUt   1>«aB| 

^   (VPlHiC      lAlV*   BJTf    P»H  ai»  J^    III  HfflPij 


BRCMDMND 
FOLDH^DtPOLE 

i    VLC\ 


<[JJ> 


MB   IENTCRPHISE3 

nil     if  INCORPORATED 


M^  J 


a«  PPPHkRtnP   l.P-lP   »M« 

iE-r™  I . p.-tm*f  ^WT  mi 


PP  w«.t 

p*.«J  H-Wi 

^.1B  *!.«» 

n.iq  fP-*^ 

m,.H  iii.ta 

1*.4V  SLIfr 

9*,.^  «P  pA 

7T.,*»  1*.1« 


*•-» 


I      -t*      •* 


r#i 
rp» 


HP' J      kA  VI 


pu  IIP  i  riui 


li^k 


PII.I 


H.« 


■r.H 


4IM  KMJU  Mi^v   Ht  «*  HIM  UUi^i 

Piu  [;i*rLi  hlfLP  ^kH  CDH  fltttH^IW 

4HI  Mil  ii|B  II  JI3UI  ic^rtir  *ihi|i   n  R^  r44 

iRIi  11    ^i>Jt    i.r    FQ    la  qna  l*    1 1|    |l|k   I 

4ti  lU'Ek   k|r|K|uiu   J  I/A*   |-Jf  M^Pkh   t  P«H 

11  WM    IFi-LC   l,ly  FfihlLl.  i|^   Wk 

^  umr   tErltU  ^'.«    Ip   i^ttmlLK 

*i  ULDb   naiLLj:  feh  *t* 
lIHi     CP  eci^u^ip  iMTXiraci 


t*.-^ 

PP.tB 

itf.n 

4dl,Ri.r 

|r*.*9 

lH.Kf 

Et*.*9 

iMi.Bn 

T.ti.«i 

Ejtl.Nll 

f  f .  Pin 

t4,l4 

3f  mi 

tr.wf 

*P-«t| 

vmrn 

MJ 

3liP.Pl 

taf.W 

Lt^.Tp 

IP~-VP 

.*9  ar 


ItU  *P 


70     73Magaime  *  June,  1982 


DISCOUNT    CATALOG 


i^te— iKP 


ic  nn>r*kn  ta  oil.  iu  ctt 


VieilJl     llll-*M   |irriiiiiu:<  CA>^4IItM 

VICJIII*       V3C    3D    ILna    I  ■  FWiM^^H  |     HI-   W4#M  m 

vicitei 


wit   li^k^Tn    LMTptfc* 


■■,•• 

iliH 

il.H 

■t,H 


m.9»     iw*,*' 

■  !(.«*        uM.il 

F«^4     *!>•  ■^'M'-llJ  1  ■   Hf"  -<>■    U-U*     i:*!.**        II'.* 

V«fl    r     «■  a^H^    fi,»«»       .  t4l.BB         Iff.** 

ii  J.  IA(  M/7/er 

BELL  INDUSTRIES 


^^4        1  ^     it   ^LI    PUBf)    I^JT    *att   LP    Viriimi. 

m-fc    ■/"¥"  a**»  wuii  •»  Lrt  MTCM* 

IP-tK      IJ-fll^tCFT-    ^^-^-r    HAei«    iLllH    VWT 

W^{.if^     >«H|eui  •»'!*  V  *9^*  UK* 
^■H-R*      141    >i^    ■^■-K*  fpi    Vt-abi 


I4.1» 

n.M 


WM.M.  NYECOMi»AN¥ 


IdTM      DU^t-BII 


PV     l»taj     tC    J'^tUAl.   Z74LJ4 


T«IW«4 


W»  PH?       that    ^^«    HK.-    -:c    >4*aU>    nJilB    tW      *f 

^.q     FOO"   Ml  rcN  ng«  pnceohn  Mf*I»iTI 

Ci'l      ^Hb.   ^I^r    ADD    [»P   ^A^Kt 


■LH 

llnH- 

t*..HG 

1«.K 

Kr»* 

fhH 

4i,«* 

ITpW 

44.IIII 

•^■B 

».■• 

TEN -TEC 


ELECTRONICS 

61  Lowell  Rd. 
Hudson,  N.H. 


:5^ 


■  i'-JSQ       *C[^    P^Filii    P4I    ^ItlTR 

lkJi-9      LAr  HIM  ^IIlr  4vi|  Mvt  MMTll^ 

UH*I  mei'*    L*4«-1W«  UNI    IH-IMWME   f  limi 

■93IP  *i'    'v  rm  \jm 

T{nDLD  »[■       ]H^   P<tllHfl 

^'lIDl      ■NM4KJIHP  ><tW*    IkWaC 

■jstn  MSB  k*-t  ive-'HH  mi  i^h  p<v  mmt  *^\MK*n 


t  D-^  A — c  n^  u 


^  !  PP 

la.u 


VH.Wb 


114. 


H4     ILSmtf   m%^  1 
KIP     «ie  «9I   ifi^Bi 

tlD       Bl^AJ    Pl4<U    ■1''|P 

m*    W10'  El  PlL,t«n  rrt 

DPhEC'WBBCULll      ItCIIIL 


l»^V 


*h» 


HiBH    iMHI 


l<<rQ4       in.H 


RAC 


1..1 


IIP- 


«£.K 


<ltn     llTttMb  4e  ll^f^'  W    L»' 

PV-ltr     fpTIRMh   vfff 
iP»riDW      WUWt*   Pt«(«  P*TP» 

iF^iPT    isnumh  mmm 

prif-inm     twwtvllPftfl  y/l  HTM  PBPUU 

fW-ieLl      t^TIIMIC   W9 

tH«  4t    ^  •■.IP  1^  *  »;w 
ITB~4*t     fciM  I  «^«J  !:;^ZM 


IM-rfP 

m^B> 

di.te 

Itl.QO 

p*t^» 

rit,v 

Htl-iP 

iiT^.n 

L*1.H 

hL«*,  n 

•«,W 

m-M 

LiM.f^ 

■  I*. 'OB 

^IL.M 

aWnHi 

^*■^* 

iw-po 

\.**,m 

d.ie 

PrW 

■Hhi^ 

Md.lfe 

«*.» 

rtf.* 

tn.M 

iUjH 

*t. 


■la.H 


[i«j1 


ROBOT 


tfwLmM  mma** 


■W       CWBTT<r    rilMBHiiB    kTL  ■  ■    IC^BI 

■Mtvi;  'jq~4iiH       i   I  «i^  Mn  i«ifk.|.  re 
uC-LUei.     HP    rutCVJ  I  tON  f  «Ju 


na    3p  FT  TQ«n  HCTK^ 

■^       TOP    WEI  IK   pj(MB|t«    PIBTI    T9 


ITC 


M4.M 


14*rlH 


PDHKTI 
KX,  I  D    ITIlTl    sU  I  lta> 


I.  IB 
i.H 

■  '•■ 

I.  (HI 
T.K 

P-H 

k.H 

■  nVt 

P. Hi 


ImI 


kit 

'•p-H 


n.tB       t>i-*p 

Pl.tt  *J.1H 

ti.Dt       a*.  Ml 


tOMTIi 


k»#    ** 


HP 


pp'ik  4*111  kc*&.t  M  rt 

H   '<I>IP   HJ«4Ll    t>  iT^ 

n  4«T||B  fiPihi  n  ^ 

I  a  qt|B  9)pqtl   k<  ** 

W   M'U   ^*pr  B£ir^f   11   PT 
P»-H]1)     H  Tf^iJ   IP  **t\m  '■;i.ijfn  dipilj:   iId  »i 
^E>M«J1D      ilQ    INPU    ID   iq*tPi   rDuBii.   DJ^SlI   U  PT 
Pfr-AtMQ      idMOril   «rlt  PClHC   tt^OLI     ITD   pi 
Pfr'+Mt     4ia^ie/il  WIAI  PBlBCE-  «i^%.i  **  pi 

THI      »'-ir   tW  BP  BClL   P?*«  P*44 

[■•ULBTVI1   •B  H-n*   Ht'ZM   Pl^ftJt  m 

]«    am  frn^  ri*j^<f$Ap  -PbU 


PH 


3-TBA  Tri-Band  Beam 

10- 15    20  METER 

Fixed  Station  Antenna 

t»^wnmiia  sv^m^t^^f*^^  M^kf^  (1'pdrtiEtft  ui' 
■OliitUiianTg  OUP'Ap  li  iKiv.!*  ift  "i^pi  Wai»»  S-tftA  <f « 


4a    -a  vQcr   <qiPiif  #•■■11. 
lit     i»  «aaT  TitPB^  ittl^ 

J       I  CM    IMP    VMCbI' 
■  IQP    Mt«    KN'    TIM    lApLL 


4    ^OCPI 


wf  er  MuncD 


pr  ceHCirri  m  wtm<«  ppo  iDiJii.)i«H 


KIJ^       10   -TT    TILP<IC3r|h 


bP|]*4 


*{]{]'<   ■■njHt  POP 


■  ftwM 


IfrK? 

JJ.H 

4r'«D 


•p. 


T 


n.-H 

tk.K 

I3rK 

»t'«B 
41, H 

XFrH 

l3.H 


*i'k 


pl.H 


PT'Wi 


it^lbl  ■«'±   ^_ip4PIBi 

■^tE  "i'Ua  P3i    («Tj]*i 
PEE   (OTJlwit 

NEC   t«7.FT«T 

PIG    EflJ^tlF*  __ 

eprt   [^U  «Bf  BW  KN«  itC*^  fTC 


iP>.4n&  kADPj  k  P^f  PELTEB  «1V  Pt'CHt 
|P1.*«>(      IW  HI    I   P&I  PPtTIP   ^c^   !>►-(»* 

4PI,1HA  p  Hhl  B  P^^E  nn  PtLltH  I'd"  f'-OM 
lPI|D»ritl     h»  Hi    k  ^DlI    H»  ir  Pfk'IH  PIP  'T~w 
MM  U«31      NEHtip-i    MCp-Ii^   MPPP   'PP   ■"■QM 
krr-;9H      Dt^'l*  W**   •tl'^VP   >1P4 '''   PI^  '''-4P* 
bC-CP*J     K  QPM^  *«»  Pl-pOtt 

pv-EtiB"    ivw  ■EI1141EW  ^4P*  ^ni  wm  >i-afrlft 


M'J  1  P    i    ll    H     '■  


.pa 

■  Hi 


PIE 


**,»« 


14, 


4f  .1* 
4*hl« 

4«,4» 
44. IH 
E<,Ki 

L*,  at 

BtP.H 


nvrPt 


I    RT>   n|N4''Pt^        »   MtTIR    N[l||-P(»<    tMTVtm    1^  L*    ■» 

KQiV  J  tttfl  Pi^pq  aiiq^Tin  i  td  n  wtTYi 
I  Pin  P»<tP  HfliTIP  3  itl  tfl  MTTI 
4Mt      BOItVIIITt   EC-HT   TEi  33  H4TT   'VHkt 

U*  mtw   {tQujmitkJi  w  'mm  PC  nm  i^Miu 


UHMkfc}  t  t-L,-*J'**|tvi;!0 


E4. 
■■HI 


LL.H 

Jin* 


IB4,*» 

11. h) 


jj] 

II 


•-I     M  M«^  ■?»  '^flrt  piPa-»» 

Hi        i    IHa    MklMl*    >j'     II  E^ 


fllD 


iP.ie 

IP.H 


PMi^l   ■'1.3*1-'   4 

mm^  *«  i^A*:  Pv^  -u  -m  m-m^macm 
-M\.a    'Of*  itppia.'.j'  rfP  h^RCT'PaasH  h  pv^' 

Pt-I-XH       PLlMC    DMITP     ■'■t'tlj    PitEPrt    t    rL><''|HfiH'' 

OPEN  DAILY  9- 6 
SUNDAYS   12-5 


i+* 
jpi, 


El». 
I«T  , 
iPi. 


!3  BlirTlirJl^'^INiyi.ltJT 
b«  E.JUa'I'LlAilEVCG 

arv  E I VQU  OPtH^t  f  ■  on  on 

1fl«l94X*««IO  MtTmt 

'Sit- a  MO     CiCl^lL*      ''C     f 

ITim    Pin    «n*.i.     uaiui-i. 

«aQ4  ^P  AH'^tHM^  CH*# 
rtfl  91  A  i\(HJL*'i*NC)  T**f 
4hfrihJtlA-| 

t-Mirv  C ei'^ r>DniFi I  qil  -thii  )4ii  II  I, 
HmhA<f  Cfglui.  *ltl  LliP  UK' 
4DiLl,.*.'*l(vei5  ^l'sdlrfi  Timp 
"PilMC^  t+AVl   E^QMVlflCI&L 


■     A*v|ff    #onci»    p*Oi. 
COi«ltTi    KIT   m 


ttfi 

-  -     ^t^tm 

■k.]     rrpHEHi 

TI1I4  nonrk*  pie 

r   H'TP    ]'|H 

1-n    BPiirix  ta*  P9  i4yLTm,i  w  on^i 
PMp-}     HP  Hch  itpiiLp  POPin 
I'rii    IKH*  DPbLi 

i^niL     IDPB  C4PlI 

PV-lflll        E«   •(TT    M^   PV    1*^     4P|T1   «4 

ri-n*B    PSBP  rflp  I  WW  m  b  **o-iiw«M 
»T-«f*i     •■■  i«T|P  vhbi  PVrfiiU  41.11- 


ripl 


•l- 


1t>.li 

**-pp 

ttr 

w 

lM.«i 

uW 

HF.IH 
■l.tq 

i-«p 

34.  IQ 
•  »-.WI 

IBl 

■X 

::»  ■!> 

ITT 

sc 

Ill      W! 

w   #ivi  m^co  «fr4q 


■  J 

T«A.Pt 

•    r    ■«     *tAgi     V^q    VJaH^Er 

1JD      M       PyOidlEl     ST4  1 

£IMn4  C(ib<«<  W  r« 
3  ti    *3>Li  iMATTEftPBQOP 
CNQ  lul*riir| 

i  iNlTNuPTidNI 

tip 


Pta 


4f* 


^B     UrM   •ta|> 
••fet     '4*'   F]ld   B 

piTf^  rB]^4*«  jp«  tBjoi  aMp 

MP-H       m^lipil    III  ^T    ?    PMIUi-LPf    4   PUtTVI 
ffcl'11      El  it^  m*  hJ«P  BLfPIM  bMI-ytP*  UH 
me      EHIirtf  LB*  *.JP   IBLhT   PlJIKI   I" 
liCII«I      HIRE  eUTTlP  injPPiP   «U  JIfIt  PIUJIl 

IIP    ut^ftmH  trrK  tvLlttti 

ie>|AMT    i|M]PB««  tta.  ur  i«  inott  rr  BPiviPt 

TC^lH*'      4B   i«V  B4   TDOL   H   «P|MP|   HyBflP   BP^ 
m-J pp|T      i«   ipr  n.  'riavtKl.P   kl    BP  E«^  P  -^^ 


»3,»I|' 

•DP.BT 


ii.*i 
tt-H 

E4.W 
4krBt 

Eihve 

PPI.-H 


MODEL 


DESCRlPTiON 


^    QTV     I  UNlTPRiCi 


JMi  ?flB  «■»!  ^  ^i^ 
«  fdb  '3*1'^ 
*  ?A<3Es  1'onr  IQ  VK»  nii'Lc 

■  L<<'ige9i'  iqfpmiini    73'  I  1  'iin' 

■  liQQn^  LenflPi     I^IIIihI  4)nij^i'4 
t    tuinrnj  FBd^rJi.  •  13  \t*t 


TUFTS 


ELECTRONICS 


SAVE 


(SEND  $1  FOR  OUR  ENLARGED  CATALOG) 


NAME 


MINIMUM  SHIPPING 


ADDRESS 


NO  SALES  TAX  IN  NH 


CITY 


STATE 


2  IP 


TOTAL 


CARD  NR 


iUECiL 


MA 


STEflCARD 
EXPC 


PRICE 


H 


3.50 


daTF 


VISA 


i»ilC*-^  IMTM* 


J 


SIGNATURE 


(PRICES  SUBJECT  TO  CHANGE  WITHOUT  NOTICE) 


ORDER  BLANK 


ei  LOWELL  RD..  HUDSON,  N.H.  03051 

TEL:  (003)  eea-M05 


^Se*  Ust  of  Advertts^ts  on  page  ft4 


73  Magazine  •  June  J  982     71 


SOM 


MATH 


FROM  MICROLOG 


START  WITH 
THE  FANTASTIC 
ATR-6800  SYSTEM 


FOR  RTTY/CW . . . 


PLUS! 


"BASIC"  COMPUTER  LANGUAGE 

+ 
COMMUNITY  MAILBOX 

+ 
CONTEST  DUPE SHEET 

+ 
MESSAGE  EDITOR 

+ 
24K  BATTERY-BACKED  MEMORY 


Write    and    load    programs    In   easy   to    use 
"BASIC". 

Enter,    store,    replay,    delete    etc.    individual 
messages  remotely. 

Did  you  work  him  or  not?  When?  etc.  or  use  for 
personal  station  log. 

Create    perfect    message    quality    text    with 
editing  capabilities. 

Never  lose  your  MAILBOX,  station  LOG,  DUPE 
sheet  or  program.  24K  =  24576  characters. 


The  most  complete  communications  system  available  today 
(or  for  years  to  come!) 

With  the  addition  of  tliis  one  internal  multifunction  board  and 
basic  module  to  your  ATR-6800,  ALL  of  the  above  features  are 
available,  as  well  as  the  superior  RTTY/CW  performance  in 
one  attractive  RFl  PROOF  paclcage. 


Factory  installed  for  $599,  contact  us  for 
scheduling  at  18713  Mooney  Dr.,  Gaithers 
burg,  Md.  20879.  Tel.  301-258-8400. 
ATR-6800  with  9"  video  $2,495. 


*^51 


MICROLOG 


INNOVATORS  IN  DIGITAL  COMMUNICATIONS 


72     73  Magazine  •  June,  1982 


Confidential 
Frequency  List 


'^^flEWUl 


7^^ 


I    '^'*^- 


,^m 


*«i*S 


New  5th  edition  by  Perry  Ferreii 


Bigger  and  better  than  the  world- 
acclaimed  4th  edition,  tiiis  new  book 
has  30%  more  stations  listed,  more  than 
7500  operating  between  the  interna- 
tional broadcasting  and  amateur  radio 
bands,  spanning  4-2B  MHz.  Listings  by 
both  rrequency  and  call  sign  reflect 
present  and  post-WARC  assignments. 
Complete  list  of  Coastal  CW  stations 
plus  Embassy.  Aeronautical,  Mililary, 
Time  Sigs.  Feeders,  VOL  MET.  FAX.  IN- 
TERPOL, etc.  Mew  details  on  scheds. 
emergency  channels,  aJternates,  and 
never-before*published  IDs. 
In  USA:  S9.95  Book  Mail,  or  Si  2.00  UPS 
Outside  USA:  Book  Mail  USS11.00. 
Overseas  Airmail:  US$14.00  ^  USM.30 
Registration  lo  assure  delivery, 

GILFER  SHORTWAVE 

OEPT   73«.  BOX  239.  PARK  RiDGE  NJ  0765* 


MFJ  CW/SSB/Notch  Filters 

MFJ-722  ALL  MODE  audio  filter  for  CW/SSB  has 
tunable  70  dB  notch,  no  ring  80  Hz  CW  bandwidth,  steep 
SSB  skirts  (18  poles  total), 2  watts  for  speaker  plus  more. 

Afl  mode  versatility: 

razor  sharp  CW  and  steep-skirted 

SSB  f titer ing  with  tunable  notch 

efi  mi  nates  QRM, 


MOTCM 


iWf 


<-i^i 


■*^ 


*m 


,1 « 


!■-■. 


ClffJ 


•vrj  fiPTiMUKn 


MMDICtt  fb. 


Se* 


MP>m 


New  super-selective  filter  The  new  MFJ-72Z 

■Qprimizer"  otters  razor  sharp,  m  ring  CW 
filtermg  with  swilch-seleclable  band  widths  (80. 
110. 150. 180  Hi  centered  on  750  Hi),  steep-sktrled 
SSB  fillermg.  and  a  3a0'3000  Hz  tunai^ie  70  dB 
notch  filter  with  adjusiabie  bandwidth 

Ttie  B-pole  '4  stagel  active  IC  filler  gives  CW  per- 

■  ice  no  tunaDle  fiUer  tan  malcfi  (80  Hz  band- 

widifi  gives  -60  dB  repo^se  ont  octave  from  center 

and  up  to  15  dB  noise  reductioni  The  6  pole  SSB 

iiD  bandwidth  is  c^ptTnt/ed  for  reduced  sideband 
sp  atier  ^m  Iks  ORM  075  Hz  highpass  cuiott 
plus  selectable  lowpass  cutofts  at  Zb.  2.0  and 
t  5  KHz„  36  dB/octave  rofloff)  Measures  5x2^6" 

New  Madel  MFJ  >  7?3,  ($49, ^^  is  similar  lo  ttie 
722  bulls  for  CW  Has  a  60  dB  notch  tunable 
'rom  300  to  1200  Hi.  Measufes  %2x6"  . 

Other  models:  MFJ  *721.  S59,95,  Like  722,  less 
notch.  MFJ  -  720,  S39  95    Like  723,  less  notch 


Versatile,  all  models  plug  into  the  phone  jack, 
provide  2  watts  for  speaker  or  can  be  used  with 
headphones,  All  require  9-18  VDC  or  1 10  VAC  wilh 
optional  adapter,  lVlFJ-1312  S9,95 

Order  from  MFJ  and  try  it-no  otihgation.  If 
not  delighted,  return  it  within  30  days  lof  leiui^ 
(less  shipping).  One  year  uncondtlional  guarantee. 

Order  today.  Can  toil  tree  800-647-1800.  Charge 
VISA.  MC  or  mail  check,  money  order  tor  amount 
indicated  pins  S4  00  eacti  stiippiog  and  fiandlrng 

Enjoy  improved  readability,  order  now. 


CALL  TOU  FffiE  . . .    800-t47-HOO 


Call  601-323-5869  »n  M  si        .    Je  cc        itai 
USA  or  for  lechrrtcai  mto..  order /repair  status 


ENTERPRISES, 

INCORPORATED 

(  BOX  494.  MtSSlSSIPPt  STATE.  MS  39762  -"^^ 


MFJ 


RADIO 


9i  3-3ei  - 


8012  CONSER  BOX  4327 
OVERLAND  PARK,  KANSAS  66204 


BUY-SELL-TRADE 

All  Brands  New  &  Reconditioned 


1-     I    ! 


J.— 


p  ^  J.  ^  1 1 1   I 


'm  m  »i 


'j^«' 


fcu-i    - 


f-*J 


•.  '!  IP? 


m*\ 


*  % 


SPECIAL  —  MAY  -  JUNE     DOUBLE  KENWOOD  COUPONS 


McsstcfCord 


IF  YOU  DIDNT  GET  YOUR  COUPONS— CALL  US. 


SAVE 


SAVE -SAVE 


V/SA 


NOTE:  SEND  S1.00  FOR  OUR  CURRENT  CATALOG  OF  NEW  AND  RECONDITIONED  EQUIPMENT 
SEND  SI. 00  FOR  OUR  WHOLESALE  LIST  OF  UNSERVICED  &  OVERSTOCK  ITEMS. 
SEND  $2.00  FOR  BOTH.  THEY  WILL  BE  MAILED  SEPARATELY. 


John  H.  Ktingelhoeffe^r  WB4iNM 
2608  Vantage  Cove 
Annapolis  MD  21401 


Are  You  Ready  for  900  MHz? 


This  article  is  based  on  a  paper  given  at  the  27th  Annual  VHF  Conference,  Western  Michigan  University,  Oct.  17, 1981,  Kalamazoo  Ml, 


Since  the  proposal  and 
decision  to  allocate  the 
902-928-MHz  segment  of 
the  UHF  spectrum  to  the 
Amateur  Servicei^  VHF/ 
UHF  enthusiasts  and  experi- 
menters have  wondered 
how  best  to  utilize  this  new 
resource  and  what  equip- 
ment would  be  needed  to 
communicate  efficiently  on 
it.  This  article  will  address 
those  topics  and  will  pro- 
pose a  band  plan  for  the 
amateur  community  based 
on  experience  with  other 
VHF/UHF  bands  and  prov- 
en  radio-frequency  design 
techniques. 

History 

Recent  use  of  the  fre- 
quency spectrum  from 
902-928  MHz  in  the  United 
States  has  been  for  radio- 
frequency  heating,  i.e.,  the 
Industrial,  Scientific  and 
Medical  (ISM)  service.  Early 
commercial  and  consumer 
microwave  ovens  used  this 
wavelength,  although  most 
now  have  changed  to  2450 
MHz  for  improved  perfor- 
mance at  this  higher  fre- 
quency,^ Most  ISM  heating 
devices  (typically  magne- 
trons] are  tuned  to  a  center 
frequency  of  915  MHz  and, 
with  their  pulsed  power  op- 
eration, generate  consider- 
able amounts  of  energy  in 
the  form  of  sidebands. 
Thus,  guard  bands  of  plus 
and  minus  13  megahertz 
about  the  center  frequency 
were  adopted  to  minimize 
interference  with  services 
in  immediately  adjacent  al- 
locations. 

74     73 Magazine  •  June,  1982 


Warning:  The  915-MHz 
frequency  was  origina^lly 
chosen  for  its  heating  ef- 
fects on  substances  with 
high  water  content  such  as 
food  and,  unfortunately, 
human  flesh! 

The  ISM  service  will 
share  the  new  amateur  allo- 
cation on  a  secondary,  non- 
interference basis  as  the 
proposals  now  stand.  Both 
services  will  share  the  band 
with  Government  Radiolo- 
cation (radar),  which  will 
have  primary  status  (this  is 
the  case  in  many  UHF/mi- 
crowave  amateur  bands).  In 
addition,  other  restrictions 
provide  that  the  new  band 
will  not  be  available  to  the 
Amateur  Satellite  Service 
and  that  it  may  be  suscepti- 
ble to  interference  by  Auto- 
matic Vehicle  Monitoring 
(AVM)  systems  pending 
consideration  by  the  Feder- 
al Communications  Com- 
mission.^ 


Propagation 

The  new  UHF  allocation 
has  shown  in  commercial 
land  mobile  tests  that  it  be- 
haves much  as  expected  — 
attenuation  by  natural  ob- 


jects such  as  trees  and  earth 
will  be  greater  than  on  450 
MHz,  necessitating  in- 
creased effective  radiated 
power.  However,  in  urban 
areas,  because  of  the  much 
shorter  wavelength,  its 
specular  reflection  allows 
much  better  coverage  in 
areas  forested  by  tall  build- 
ings and  tunnel  structures, '* 

Much  research  has  al- 
ready been  accomplished 
by  the  commercial  commu- 
nity in  its  quest  to  prolifer- 
ate the  cellular  mobile  ra- 
diotelephone services  into 
the  825-to-890-MHz  area. 
Several  excellent  articles 
have  appeared  document- 
ing extensive  tests  that  have 
been  performed  in  a  variety 
of  areas  (mostly  metropoli- 
tan) around  the  United 
States.^'®'^  The  operational 
characteristics  of  amateur 
mobile  FM  voice  should 
parallel  these  results  quite 
closely, 

One  area  of  concern  in 
using  the  new  33-centime- 
ter band  for  mobile  com- 
munication is  the  rate  of 
signal  cancellation  and  ad- 
dition (mobile  flutter].  At 
two  meters,  the  same  phe- 
nomenon that  causes  lost 


902X  MHz 

90Z6MHZ 

906.0  MHz 
912.0  MHz 
918,0  MHz 
924.0  MHz 


CW/SSB 

FM  voice/RPT 

(mobile  receive,  RPT  transmit) 

ATV  Channel  A 

ATV  Channel  B 

ATV  Channel  C 

FMvoicelRPT 

(mobile  transmit,  RPT  receive) 


927.4  MHz, 

928.0  MHz -Control  Links,  Packet  Transmissions 

The  band  plan  proposed  by  WB4iNM  in  October,  1981,  for 
902-928  MHz. 


words  during  transmissions 
will,  at  900  MHz,  add  a  low- 
frequency  buzz  to  demodu- 
lated audio.  At  speeds  of  30 
to  60  miles  per  hour,  the  fre- 
quency of  this  tone  will  be 
approximately  80  to  160  Hz 
for  a  transmission  frequen- 
cy of  915  MHz.  Although 
this  is  not  a  problem  for 
voice  intelligibility  (it  can 
be  filtered  out  by  appropri- 
ate audio  high-pass  filter- 
ing), it  does  cause  the  pres- 
ent continuous  tone  sub- 
audible  squelch  (CTSS), 
known  more  popularly  by 
its  trade  name,  Private 
Line,*  to  malfunction  by  un- 
squelctiing  a  receiver  when 
there  is  actually  no  trans- 
mitted CTSS  tone.  Thus,  dif- 
ferent selective-signaling 
methods,  perhaps  tone 
burst  or  digital  squelch 
composed  of  a  short  dura- 
tion serial-bit  stream  at  the 
beginning  of  each  transmis- 
sion, would  be  required  for 
reliable  operation, 

Hardware 

Equipment  for  commu- 
nicating at  900  MHz  is  an- 
other area  where  the  com- 
mercial communications 
services  are  helping  almost 
as  much  as  when  they 
dumped  thousands  of  old 
VHF  high-band  transceiv- 
ers on  the  amateur  market 
in  the  late  1960s.  Although 
it  will  be  many  years  be- 
fore the  new  cellular  radios 
will  be  available  as  surplus, 
the  components  and  tech- 
nology used  in  these  trans- 
ceivers will  be  produced  in 
mass  quaint  it  ies  for  the 
many  tens  of  thousands  of 


■y  WACOM 

J  p  iss.^  I^^^^^^^^^H 

1     1 

SSV 


USPaltnt  Na.4,0aaeill 


-:jj?-' 


OUR  NEW  BANDPASS- 
REJECT  DUPLEXERSWrTH  EXCLUSIVE 

BpBr  CIRCUIT  FILTERS^ 

. . ,  provides  superior  performance,. 

especiativ  at  close  freauencv  spacing. 

Models  available  for  aJl  commercial  and  ham  bands. 

Special  prices  for  amateur  repeator  clubs 

^7^ 


■t  yVi^^^  J-.rtiftrti>rt  .  ^  y..->  Ji ., 


^j -rrnr 

n'rrrT:TnT7::^lTTiTi 


P,0.  BOX  7127  •  WACO,  TEXAS  76710 
817/848^4455 


MFJ/ Bencher  Keyer  Com 


•  II 


Deluxe  MFJ  Keyer  fits  on  Bencher  Paddle.  Curtis  8044 
IC.  Iambic.  Adjustable  weight,  tone,  volume,  speed. 
Semi  and  automatic  modes.  Solid  state  keying.  RF  proof. 


MFJ-422 

Combo 


$ 


99 


95 


MFJ-422X 

Keyer   only 


69 


The  58S1  of  all  CW  worlds  -  a  deluxe  MFJ  Keyer 

in  a  compact  conftguration  that  fits  right  on  the 
Bencher  iamt]ic  paddle'  You  can  buy  the  combina- 
tion or  just  the  keyer  for  your  Bencher. 

New  MFJ  Keyer— small  m  size,  big  in  features. 
Curtis  B044  IC,  adjustable  weight  and  tone, 
front  pa  lel  volume  and  speed  controls  {3-50  wpm). 
Built-in  dot-dash  memories.  Speaker,  sidetone,  and 
push  button  selection  of  senil-automatic/tune  or 
automatic  modes. 

Ultra-reliable  solid  state  keymg:  gnd-DlocK, 
cathode  and  solid  state  transmitters  (-300  V,  10  mA 
max..  +3Q0  V,  100  mA  max.).  FuNy  shielded. 
Uses9V  battery  or  110  VAC  witti  optional  adapter, 
MFJ  1312.  £9.95 

Beautiful  functional  engineenag.  The  keyer 
mounts  on  the  paddle  base  to  form  a  small 
(4  1/8x2  5/8  X  5  t/2"l  attractive  combination 
that  is  a  pleasure  to  look  at  and  use.         ^47 


The  Bencher  Paddle  is  a  cest  selfer  Fully  ad- 
justable  gold-plated  silver  contacts,  lucite  paddles, 
chrome  plated  brass,  heavy  steel  base  with 
non 'Skirt  feet. 

Order  from  MFJ  and  try  it-  no  obiigatioji.  if 
not  delighted,  return  it  within  30  days  for  refund 
(less  shipping).  One  year  unconditionaljuarantee. 

Order  today.  CalTloTl  free  SOO-647-1  BOO.  Charge 
VISA,  MC  or  mail  check,  money  order  for  amount 
indicated  plus  $4.00  each  shipping  and  handling. 

Enjoy   CW.   See    dealer   or   call    MFJ    now 


CALL  TOLL  FREE  . . .   800-647-1800 


Call  601-323-5369  m   Miss.,  outside  contmental 
USA  or  for  technical  info.,  order/repair  status. 


MFJ 


ENTERPRISES, 

INCORPORATED 


BOK  494.  Mississippi  State.  MS  39762 


The  1982  Atlanta  HamFestival 


ARRL  Southeastern  Dhdsion  Convention 

June  12  -  13,  1982 

Downtown  Atlanta  Marriott  Hotel 

•  GIANT  covered  Fleamarket/Swapshop!      •  140  Mafor  Exhibits! 

•  More  than  25  Forums /Meetings!  •  Special  MICROPROCESSOR  Section! 

•  FCC  Exams!  •  Programs  for  Ladies  &  Children 

•  Parking  for  thousands  of  cars!  •  Activities  Galore! 

Registration:  $5  per  person  IN  ADVANCE,  $6  at  tlie  door  (add  $1  for  your  spouse,  children  FREE) 

If  you  do  not  receive  a  Preregistration  packet  by  May  15,  write: 
Ajtlanta  HamFestival  •  P.O.  Box  82412  •  Atlanta,  GA  30354 

Hotel  rates:  $50  per  day  single  OR  double 

Write  for  Hotel  Reservations  to: 

Marriott  Hotel  •  Courtland  at  International  Blvd.  •  Atlanta,  GA  30303 

or  phone:  Area  404/659-6500  and  hurry,  hurry,  hurry! 

THE  BEST  HANFEST  IN  THE  WORLD! 


See  Lf$t  of  AdverffsSfii  on  page  114 


73 Magazine   •   June,  1982     75 


mobile  radiotelephone 
users  that  are  expected  to 
populate  the  adjacent 
commercial  band  in  the 
next  few  years.  Several 
semiconductor  manufac- 
turers already  are  produc- 
ing  comporreots  that  will 
WQfk  well  in  amateur  trans- 
ceivers.^-^ ^^^ 

For  those  who  don't  want 
to  build  down  to  the  basics, 
there  are  also  hybrid  power- 
amplifier  modules  that  re- 
quire little  more  than  appli- 
cation of  proper  drive  sig- 
nals, power-supply  volt- 
ages, and  heat  sinkingJ^ 
These  would  be  suitable  for 
FM,  PM,  or  CW  operations, 
and  require  only  250  milli- 
watts of  input  energy  for  7.5 
GT  20  Watts  output. 

Receiver  designs  will  be 
of  the  same  general  super- 
heterodyne style  we  are  ac- 
customed to,  but  with  sig- 
nificant differences  in  the 
construction  of  the  rf  am- 
plifier and  first  mixer 
stages.  To  enhance  selectiv- 
ity, small  cavity  resonators 
or  helical  resonators  will  be 
used  for  their  low-loss  char- 
acteristics and  their  physi- 
cal size^  which  will  reach 
manageable  proportions  at 
this  wavelength.  Gallium 
arsenide  fieid-ef feet  transis- 
tors, once  expensive  de- 
vices for  commercial  and 
military  systems,  will  be 
employed  to  minimize 
noise  figures  when  used 
ahead  of  Schottky  diode 
double-balanced  mixers 
known  for  their  inherent  ex- 
cellent  wide  dynamic 
range.  The  cost  of  these 
mixers  Continues  to  de- 
crease as  they  are  used  in 
more  and  more  communi- 
cation systems.  Several 
manufacturers  already  of- 
fer, in  small  quantities,  pre- 
assembled  mixer  modules 
that  work  to  1  GHz  for  un- 
der ten  dollars. 

Building  at  900  MHz  will 
introduce  the  newcomer  to 
a  different  attitude  toward 
the  components  he  uses. 
The  rules  here  are,  ''the  on- 
ly  good  leads  are  no  leads/' 
and,  ''rt  may  look  like  a  ca- 
pacitor   to    you    but    what 

76     73  Magazine  •  June  J  982 


does  it  look  like  to  the  cir- 
cuit?" At  this  frequency,  a 
one-eighth-inch  lead  of  #22 
AWG  wire  on  a  270-picofar- 
ad  disc  capacitor  exhibits 
an  inductive  reactance 
larger  than  the  capacitive 
reactance  of  the  capacitor. 
Thus,  the  capacitor  at  this 
frequency  is  actually  acting 
as  an  inductor. 

Chip  capacitors,  capaci- 
tors with  no  leads  at  all,  are 
frequently  used  where  this 
effect  becomes  a  problem. 
Although  they  are  reason- 
ably expensive,  their  price 
can  be  expected  to  de- 
crease since  the  production 
process  for  manufacturirig 
them  is  automated  and  they 
are  now  being  used  in  the 
computer  industry  to  help 
digital  devices  comply  with 
stringent  new  radio  fre- 
quency interference  regula- 
tions. 

One  of  the  toughest 
problems  to  tackle  will  be 
that  of  frequency  stability, 
especially  in  mobile  and 
portable  equipment.  Con- 
sider a  typical  transmitter 
crystal  of  frequency 
33.4074  MHz  (902  MHz  di- 
vided by  27X  with  a  toler- 
ance of  0  001  %  over  the  ex- 
tremes of  temperature, 
shock,  and  voltage.  This 
crystal  could  exhibit  a  drift 
of  9  kHz  at  902  MHz  and 
still  be  within  specification. 
if  the  new  amateur  band 
were  to  follow  the  normal 
25-kHz  channel  spacing 
and  13-kHz  occupied  band- 
width used  on  450  MHz,  if  is 
obvious  that  the  communi- 
cations system  would  suffer 
great  degradation  in  both 
adjacent  channel  selectivi- 
ty and  demodulation  distor- 
tion if  this  crystal  were 
used. 

Several  ingenious  ideas 
have  been  proposed  to  alle- 
viate this  stability  problem, 
or  at  least  to  transfer  the 
problem  to  a  station  capa- 
ble of  maintaining  an  accu- 
rate frequency  standard. ^^ 
If  the  mobile  transmitters 
were  designed  to  operate  in 
full  duplex  mode,  the  signal 
received  from  the  repeater 
(assumed  to  be  stable  and 


accurate)  could  be  used  as 
a  reference  to  which  the 
mobile  transmitter  could  be 
frequency-locked.  Since 
the  vast  majority  of  vehicu- 
lar operation  on  this  band 
will  most  certainly  be  tied 
to  repeater  systems,  this 
method  represents  a  very 
Cost-effective  solution.  The 
band  plan  suggested  later 
in  this  article  was  devel- 
oped with  this  concept  in 
mind. 

Another  positive  aspect 
of  a  full  duplex  system  is 
that  it  will  allow  the  opera- 
tor to  gain  immediate 
knowledge  of  how  well  he 
is  communicating  with  the 
retransmission  site,  be- 
cause he  will  be  able  to  lis- 
ten to  his  own  signal  as  it  is 
retransmitted  [perhaps  at 
reduced  volume  in  the  re- 
ceiver to  prevent  audio 
feedback). 

Antennas  for  the  33-cm 
band  will  be  small  enough 
to  be  built  easily  with  sim- 
ple hand  tools  and  mount- 
ed on  masts  no  larger  than 
small  television  antennas.  A 
fourteeo-element  parasitic 
yagi-uda  array,  which  mag- 
nifies a  transmitter's  power 
16  times,  occupies  a  space 
of  only  6.5  by  28.5  inches. 
Corner  reflectors,  which 
have  never  been  widely 
used  by  amateurs  at  lower 
frequencies,  are  Easily  con- 
structed and  offer  a  decent 
amount  of  gain  and  fairly 
wide  bandwidth.  Of  course, 
for  those  who  can  afford 
the  price  [and  have  no 
neighbors),  a  four-meter  di- 
ameter parabolic  dish  gives 
about  27  dB  gain  and  can 
be  used  on  the  higher  mi- 
crowave bands  as  wel 


Using  If 

Many  different  ideas, 
amateur  conventions,  and 
technological  factors  were 
considered  when  attempt- 
ing to  formulate  a  band 
plan  that  would  serve  all 
the  needs  of  the  amateur 
fraternity.  The  following 
plan  is  the  distillate  of 
those  components. 

One  aspect  of  the  hobby 
that    appears    to    be    in    a 


growth  mode  is  that  of  fast- 
scan  television  and  com- 
puter-generated video.  On 
the  70-centimeter  band,  the 
wide,  buzzing  video  car- 
riers are  not  well  received 
(more  accurately,  not  wel- 
come) near  the  weak-signal 
satellite  downlink  subband 
from  435-438  MHz.  This  has 
prompted  ATV,  in  several 
metropolitan  areas  of  the 
country,  to  move  to  23  cm 
in  search  of  usable  spec- 
trum. However,  the  expect- 
ed allocation  of  1260-1270 
MHz  to  the  amateur  satel- 
lite service/  coupled  with 
the  recent  removal  of  ama- 
teur operating  privileges 
from  1215  to  1240  MHz  for 
military  navigational  sate!- 
lite  systems  (NAVSTAR, 
GPSS),*  as  well  as  the  diffi- 
culty of  generating  healthy 
amounts  of  power  at  23  cm, 
makes  this  band  less  than 
desirable  for  fast-scan  tele- 
vision. 

!  am  proposing,  there- 
fore, that  three  6-MHz-wide 
standard  video  channels 
(with  multiplexed  FM  voice 
if  desired)  be  centered  in 
the  proposed  band  plan. 
Since  these  three  channels 
would  be  broadcast  stan- 
dard video  format  and  fre- 
quency spacing,  only  one 
local  oscillator  per  down- 
converter  would  be  needed 
to  mix  alt  three  down  to 
contiguous  VHF  or  UHF 
broadcast  channels  for  dis- 
play on  a  standard  unmodi- 
fied television  receiver. 

For  the  FM  crowd,  the 
band  plan  proposes  128 
new  FM  channel  pairs 
spaced  at  25  kHz,  with  the 
transmission  and  reception 
frequency  difference  [split) 
at  21.4  MHz,  This  would  al- 
low use  of  relatively  inex- 
pensive monolithic  crystal 
filters  at  an  intermediate 
frequency  of  21 .4  MHz  and 
the  frequency-locking  of 
transmitters  to  received  pi- 
lot carriers  from  repeaters. 
Although  this  is  an  extreme- 
ly low  first  i-f  for  a  radio  of 
this  type,  a  judicious  mix  of 
image-cancelling  mixer 
technology    and    low-loss 


WORLD  TIME 
WATCH 

the  first  microprocessor  watch 
made  especially  for  hams 


24  hr.  timer 

microprocessor 
water  resistant 

solar  a^ist 

New  Low  Price 
-$59.95 


The  HAM-1  functions  tnclude  local  time, 
world  time,  (G.M.T.  too)  count-iip  and 
count  down  chronometer,  day,  month, 
date,  alarm  and  hourly  chime.  U's  ideal 
for  log-keeping^  DX  time  conversion  and 
10  minute  LD.  timing.  The  HAM-t  fea- 
tures  B  high  contrast  Seiko  display  ^nd 
solar  cell  battery  assist.  Battery  life  is 
better  than  4  years.  Tfie  HAM-1  Is  water 
resistant  to  20  meters,  the  case  is  100% 
solid  stainless  steel  and  the  crystal  Is 
scratch  resistant  mineral  glass.  The  HAM- 
1  is  rugged  and  durable  and  has  a  1  year 
warranty. 

2  METER  AMPLIFIER 
$39.95 


•  2  Watts  In,  10  Watts  Out  •  V,S,W.R. 
Protected  •Can  be  Used  for  F.M.  &  S.S. 
B.  •  Led  Status  Indicators  •  Low  Loss 
SO' 239  Connectors  •Current  Drain  Less 
Than  2,5A  at  13.6  V.DX,  •  Massive 
Heatsink  •Built  In  T/R  Switch 

TEMPOS"!  UPGRADE  KITS 
$39J5 

Upgrade  your  early  Tempo  S-1  to  cur- 
rent Production  Specifications,  kits 
include:     »450    M.A.H.    Battery    Pack 

•  New  Cass  Assembly  •  At  I  New  Es- 
cutcheons •  Spkr./Mic-  Jack  w/Dust 
Cap  •  INJew  Earphone  &  Jack  ♦  P.CB. 
and  Parts  for  Easy  Instaifation  •  Detaiied 
Instruction  Manual  •  For  Radios  With  Si 
Without  T.T.  Pad. 

Other  Accessories  Available: 

Spkr/Mic.  Designed  for  S-I's.  .  .   $24.95 

Heavy  Duty  Belt  Clip. 7,50 

Flex  Antenna -  6.00 

To  Order  Call  or  Write  to: 

ADVAISiCED  COMMUNICATIONS 

INTERNATIONAL 

2411  Lincoln  Avenue       j^443 

Belmont,  CA.  94002  U.S.A. 

t4l5)  595-3949 

Add  $3,00  per  order  for  shippmg  & 
handhng.  California  residents  add  6% 
sales  tax.  Visa.  Master  Charge  accepted. 


^NEW  MFJ-312  VHF  Converter  lets  you 

HEAR  POLICE/FIRE  CALLS 

and  Weather  Band  on  2  meter  rigs.  Covers  nearly  all  FCC 
altocated  police/fire  VHF-hi  freq.  (154*158  MHz).  Direct  freq. 
readout  on  synthesized,  VFO  144-148  MHz  FM  rigs. 

Scanning  rigs  become 

Now  with  weather  band  coverage!       police/fire  scanner. 

Direct  freq*  reaifaiit  on 

synthesized  and  ¥FO  rigs. 


Hear  exciting  police/fire  calls,  weather  band, 
maritime  costal  and  more  on  your  2  meter  rig! 
Scanning    rigs    become    police/lire    scanner. 
This  ingenious  MFJ  VHF  Converter  turns  your 

synthesized  or  VFO  144-148  (VIHz  FM  rig  into  a 
hot  police/fire  receiver  (154-156  MHz)  with  direct 
frequency  readout  on  your  rig. 

Receive  weather  plus  more  on  160  164  IVIHz. 

Feedthm  allows  simultaneous  scanning  of  ttoth 
2  meters  and  police/fjre  band    No  missed  calts. 

Enjoy  all  benefits  of  your  rig  such  as  squelch, 
exceflent  sensitivity,  selectivity,  stability,  limiting, 
AM  rejecifon,  For  handlields,  too. 

Two  MOSFETS  (tuned  RF  amp,  mixer),  bipolar 
crystai  oscillator  gives  excellent  performance. 

Bypass/off  switch  aliows  transmitting.  Won't 
burn  out  if  you  transmit  (up  to  25  watts)  with 
converter  on.  Low  insertion  SWR. 


ill 


'On"  LED.  9  18  VDC.  S0-Z39,  Mtg  bkt.  3x4x1". 
MFJ-311,  549.95.  Like  tVIFJ-312  iess  WX  band- 
Order  from  MFJ  and  try  it  -  no  obligation.  If 
not  deiighted,  return  it  within  30  days  for  refund 
(less  shipping).  One  year  unconditionaLciuarantee- 
Ordef  today.  Call  toli  tree  800  647-1800.  Charge 
VISA.  MC  or  maii  check,  money  order  tor  $59.95 
tor   MFJ  312,    $49.95   for   MFJ  311    plus   $4.00 
each  shipping/handling. 
Enjoy  exciting  police  and  Tire  calls*  order  now. 


CALL  TOLL  FREE  . . .   800-647-1800 


CaJi  601  323  5869  for  technicai  information,  or 
der/repair  status.  Also  call  601 -323-5869  outside 
continental  USA  and  in  Mississippi.         i^47 

MIE   I  ENTERPRISES, 

IWirV  INCORPORATED 

Box  494,  Mississippi  Stale,  MS  39762    J 


YEAR 
WARRANTY 

NEW  for  220 i 

C22  AMPLIFIER 

AII-mode/2W  in  —  20Wout 
200MW  to  5W  Drive 


2  Meter 
"All  Mode" 
Amplifiers 

FM  -  SSB  -  cw 

B108     low.  in 
81016  low.  iri 


C106  AMPLIFIER 

SSB,FM,CW 

lOWin-eOWout 

2Win  — 30Wout 


80  W.  out 
160W.  out 


B3016  30  W.  ih  =  160  W.  ouf 


as  3 


W.   in 


30  W.  out 


$179.95 

279,95 

239,95 

89.95 


These  amplifiers,  eiccepf  B23,  Inave  built  in  RX  pre- 
omps,  Tl^e  BIOS  and  B1016  moy  be  used  wirh  NTs 
or   transceivers.   They   wifl    key   with    1    Watt   input* 


Dual  Purpose 

for  HI  or 

Xcvrl 


RC  - 1   Remote  Control  $24.95         Xcvri 

SEE   YOUR   NEAREST   DEALER   FOR   INFORMATION 
MJRAGE  COMM.  EQUIP.,  INC.    '   P.O.  BOX  1393    *   GJLROY,  CA  95020 


M99^ 


(408)  847-1857 


j^See  Ust  Qf  Advertisers  on  page  114 


73  Magazine  *  June,  1982     77 


front-end  filtering  will  pro- 
vide good  image  rejection 

and  sensitivitV' 

The  portable  equipment 
receive  band  is  placed  at 
the  low  end  of  the  new 
spectrum,  causing  the  im- 
age frequencies  to  be 
thrown  into  the  avionics 
(DME.  TACAN)  band  in* 
stead  of  the  new  cellular  ra- 
diotelephone band  Since 
the  smaller  mobile  trans- 
ceivers have  less  room  for 
cavity  filters,  that  can  be 
implemented  more  easily  in 
fixed-retransmission  sites. 
The  ATV  repeater-output 
spectrum  is  also  located  at 
the  same  end  of  the  band  as 
the  FM  voice  repeater  so 
that  the  two  types  of  re- 
peaters can  be  easily  co-lo- 
cated. Point-to-point  ser- 
vice for  low-band  repeater 
linking,  packet-transmis- 
sion techniques,  and  radio- 
command  systems  would 
be  placed  at  the  high  end  of 
the  band. 

Space  has  been  reserved 
at  the  lower  end  of  the  band 


for  weak-signal  modes,  SSB, 
and  CW,  as  is  common  on 
the  lower  VHF  and  UHF 
bands.  This  600-kHz  swath 
allows  for  many  3-kHz  side- 
band voice  channels  for  tro- 
pospheric-scatter.  moon- 
bounce,  and  meteor-scatter 
experiments.  Initial  experi- 
ments may  be  carried  out 
with  little  more  than  a  re- 
turned 451-451.30-MHz 
commercial  FM  transceiver 
driving  a  varactor  doubier 
for  CW  transmission.  From 
past  experience  with  both 
listening  and  operating  on 
the  other  bands  above  30 
MHz,  this  will  provide  plen- 
ty of  weak-signal  spectrum 
space  for  the  foreseeable 
future. 

Conclusion 

Techniques  and  equip- 
ment for  the  new  amateur 
band  from  902-928  MHz 
have  been  discussed,  A 
band  plan  which  tries  to 
serve  all  users  in  the  ama- 
teur community  has  been 
proposed.    Particular    em- 


phasis has  been  placed  on 
the  need  for  fast-scan  tele- 
vision transmission  spec- 
trum since  it  appears  that 
ATV  mode  has  been 
nudged  out  of  other  re- 
gions of  the  amateur  spec- 
trum. It  is  hoped  that  the 
discussion  of  the  new  UHF 
band  will  entice  you  to 
buitd  or  buy  equipment 
and  operate  this  frequency 
range  no  matter  what  your 
special  interest  is.  With  26 
MHz  of  spectrum,  there  is 
room  for  everybody!  ■ 

References 

1.  Proceedings  of  the  1979 
World  Administrative  Radio 
Conference. 

2.  "Microwave  Ovens -Revolu- 
tion In  Cooking;^  O.  R  McCcn- 
nell,  Eiectronics  Worid,  August, 
1970. 

3.  "Happenings'*  column*  W.  D. 
CHft,  OST.  September,  1981. 

4.  Microwave  MobifB  Communi- 
cations, W.  C.  Jakes,  Jr.,  Wiley- 
Interscience,  1974.  ISeN 
0*471 -4372CM. 

5.  "What  Happens  When  900 
MH2  Takes  to  the  Hills,"  F.  A. 


Barton,  G.  A.  Wagner,  Communh 
cations  Magazine,  March- April, 
1974. 

6.  ''Some  Characteristics  of  Mo* 
Dile  Radio  Propagation  at  836 
MHz  in  the  Philadelphia  Area," 
D.  M.  Black,  D.  O,  Redudink, 
IEEE  Transactions  on  Vehicuiar 
Technoiogy,  May,  1972. 

7.  "Examination  of  the  Feasibil- 
ity of  Conventional  Land  Mobile 
Operation  at  950  MHz/  FCC  Re- 
search  Division  Report  R'7120, 

8.  Private  Line:  registered  trade- 
mark of  Moloroia  Communica- 
tions Products,  Inc.,  Schaum- 
burg,  Illinois. 

9*  "Rf  Selector  Guide  and  Cross 
Reference/'  Motorola  Semicon- 
ductor Products,  Inc.,  Phoenix, 
Arizona, 

10.  *'Rf  Communications  Prod- 
ucts," TRW  RF  Semiconduc- 
tors,  Lawndale,  California, 

11.  Data  Sheets,  Communica* 
tions  Transistor  Corporation, 
inc.,  San  Carlos,  California, 

12.  Data  Sheets  MHW82Q, 
MHW80a,  Motorola  Semtcon- 
ductor  Products,  Inc.,  Phoenix, 
Arizona. 

13.  "  'Logical'  Design  Relaxes 
Tough  Crystal  Standards/'  S.  J. 
Lipoff,  Microwaves  Magazine, 
August,  1977. 


applG 


TinMirtAU.  II  t  nanjwtf*  ai^  sofmtf«iti«m  inti  eofivtra  vour 
piit«^  cOrriDaTv  irtQBstitvQf  ihiiitcommuiTicitKinilinninil 
Ttrmin^ll  iHcum  frrr^ie  cxmrmctfiffm  to-  vou*  compuiv  ifl6  ttOiQ 

TinMiN«Lj.  ««  de»9r«]  from  wm DUttM  to  t»  wmt  Id  co^fitet 

'  -  3  ind  cBv  m  \sm.  P^  «iio fow  *wcm^f9<  '■'N^c'^i'-* 

sy  Mof  Codt  Of  ^niiefWHwllTTYi   Pi«a  -^d  ,&-/ 

t  end  ttr«d  MiTM  Coili  Atu^  «  nM^fOBf^r^  ca'-nflc- 

toi  m^  Mnd  BmtOat  ot  ASDi  RTTV  uainB  ftjdie  tonct  (A^Sci 

Thif  t  itf  tlv«  «  n  hociunQ  n  ue 

thf  to^tMptr*  4  IokM  fl^to  vouT  cornounr  from  duk  v  e«titt» 

£«slHr  ttitiT  ajjagfi  and  tt*  Urna  f^d  IfCu  'MtnA  tl^t  'VCtnnf^  ton- 

■f«dKitiiv  ^Q  HTtmBi  far  M^pdtnwmtt  m%  n««MMhr  !«  rteim 
Mof»  Cooi.  <t'»  ^i»fm^ai0tm^-m6  a  «virti  v^u  ti^*y  tvH  v«w 
mttMoi  if^rm  ^■c*wun9  or  twwniTtfngi 

Tou  wii  b*  0(1  111*  frr.  fWKmttPA  «r-^  trgrifpj  rung  ,n  ^ny  modi,  m 

Mort  lor  rti»itr  monaf- 

a  TIflMINALL  htm  tlie  HTTY  trmrnil  un^t  -  Otrnod  tnd  AFSK 
-&uii(  tfi  ThJt  f«tuit&  m  i  kowftf  lOtM  Efiti 

■  Fafitaiilc  Moran  rie«ptlan,  Si>  iiaqi  iciivt  fillir 
dtmofl'Ljljior  copies  t^e  wflBic  an#i  AiiCa  Bd4|]ilivi  MdrM  ilgQriThm 
»ci.i*i  tn«  iiDpj^v  anee  flsoe^veii  co^e  ipMd  dii^idftd  on  tuiut 


■  OutiUndihf  dOcurniftutlDfi    ^'3'B9Sipru4Pv  writTsr.  90  o*gi 

W  Butit  in>,  iteariit,  fnuRl-tttit,  lAtlv*  flluf  RTTV  mn^  tStS 

dlmo^iu^Blon    ">"•  f%^  *3C«  oooi   ^""^  ief**-3-C',  3"r'  ^-ai  tlO 

the  (3»nfr  -  -Qg)t  owlSb s  lor  **tr  tiiAi^  Copy  me  uratfk 

■  iulR  In  crT«t»>  cq-rrtrolt«d  AFQ1L  llocfe  smCiB  Eor  tv«^  tt« 
RTTY  !v»n^ 

M  Built  Ln  tfo  9r  m  ven  AC  @<&«l«*  tuw<^ 

■  Siftn  In  p«!F«i]Bi  prlntBf  dnlvat  Boftw&m.  Sa^iiiiv  tttK^.  m 
ssra  «:  ^SCm  pfmiar  14  g  En«  I^SOM  m.x-SQj  to  yOur  prwitir  ijort 

SKI 

■  Word  wrsppinf ,  mk^  fTMM*  tvuna.  (KIOIb.  tgnom  c»mi»gH 
*»;l,<t5  ^^'  p--Q9r«mfftiMi  tfidl  of  Imi  iK}u«nce,  adiiatatiie  cv- 
ntsit  w>dTn.  ni,y7iipA|  yMf  .atlirun  WRU.  iTflritmit  cIhibv  Ifiitad.  norw 
^  Wt0  adSDt'wfi,  t>F««k  rnoOt  tnd  >Tvof«i 

■  Tlw  fllMn'Ont  TtflMlijALL  design  miltet  ii  grfiBi:  lo^  uM  on 
Hf  Of  V«F  Hi^  Co*^r-.i-ci-  SvVt  or  WfAPSH  SVVL^I- 
TESMkMALU  m^y  b«  .umiwrflfl  loi  B-lKBf  425  Of  950  Hj  TBCflpimr*  to 


Systsifi  R»qulram«nti 

TEftMINALlTI  CamTT^urvCffl  ;-;  --5'=-  -*  *0f  'Pt  T P $ >aO 'MfiO|4 1 
-  '-  '  ^iRTtt  una  d(Sa.  naernt^«!^  iHind  hr<l'«4^  tf^d 

TERM  IN  ALL  H  Cs«Ttman*ca&OfiS  itnmiftai  im  lh»  TPS€0  U^ff 
1  A»:i4ir*i  i  MoMi  til  TAf^,  t€K  tA.w  tnd  MsdH  m  BASIC  l«^ 
C'yi«f  lo'tAvnt  on  araetie  «nd  iSM^  «iii"<iiid'  tfl<d  imMS  ttsitf^ 

TiUMfNALl  Ta  CS'Trrti^nicilJDits  ibtitwm*  iw  in*  APPil  i(    Rt 

qyjf«#n  AP^vE  -^  Of  APPLE  U  Piui  ^-rh^S^  «AW  aha  fl^  Solt- 
Airf  1]  drdviatd'  pn  fjAk  m  DO^  3  2  ^O""^'  Use  yu^'^Ni  ut  1  ly  f0 
coni^n  10  DOS  3  3  f^tria!.  indyaes  saftv^s's  on  dll^(,  Biit-^  ti  f,' .: 


15  Day  Mon^iv  Bacit  Trial  Period 
on  Factory  Direct  Orders 


iROmONICS,  inc. 

1125  N.Go<d^  State  Bivd 
Turiock,  CoiitcwniQ  95360 


® 


DEPT   73 


i^  4J 


TO  ORDER  (209)  634<8B88  or  667-2888 

Wfl  are  experlandng;  islephpne  ditficultiea.  ^  Please  keep  iryung 

•TRS-80  is  a  Regisi&rod  Trademark  of  TarnJy  Corp. 
Appffl  IS  e  Registered  Trademark  ot  Apple  Computer  inc 
1  yr,  Parts  &  Labor  -  LimFl«J  Wflrfanty 


tThe  communications  terminal  that  does  it  alii 


79     73  Magazine  •  June  J  962 


BEEPER  III 


^4T 


MFJ  RF  NOISE  BRIDGE 


^rf^^li^- 


*lf^*>* 


"THE  PROFESSIONAL  TOUCH 
COMES  TO  AMATEUR  RADIO!'' 


"  BP-S  aubcijnatusily  provides  ift  {anUe  ht^h  fre- 
quency beep  a,l  ihs  beginning  of  nch.  Lran^mlB- 
sjon  &rtct  ft  loir  beep  &t  Uie  and  Vlftuolly  elnai 
jMbm  "lilk-ijver"!  Qperai«e  for  up  to  one  year 
on  A  ilii^le  9-T  baa«7  tnoi  auppliadt  Can  be 
duvcUy  mterfHsed  to  May  tf«fiso»ver  which  i£ 
AsytA  by  grounding  the  PTT  Una  fthe  FITllne 
voltags  ifiufii  be  posism,  not  groatar  than  34 
VD(X  fffiT  thtt  cuimnt  gFmmt  th&a  100  eQ4^  i 
WorJtB  with  ftrtuolly  all  nuMtem  ga&r.  Ymi^ve 
tifliLrd  It,  tiow  jrmi  can  li&v*  Itr^ 


Lets  you  adjust  your  antenna  quickly  for  maxi- 
mum performance.  Measure  resonant  frequency, 
radiation  resistance  and  reactance.  Excfusive  range 
extender  and  expanded  capacitance  range  gives 
you  much  extended  measuring  range. 

•  Exclusive  range  extender       •  Expanded 
capacitance  range        •  Series  Bridge 


a 


ADD  THE  BEEP! 


ff 


HP  3A  GompiecewiLi.  l:^^^^.  OOtilfi. 
Sttmdard  4-pm  oonnwAora 
BP3B  As  above  exwpt  without 

uuniiectoi-a.  Add  yoLU"  own 
BP-aC  CtTGuit-board  vsraksn  for 
cnjfiitOJTi  installation 
All  iinii£  aas&iTkblied^'iegtad 
add  e%  Saim  T^y. ' 


9vpVD  yy 
3$.BB  pp 

as  .98  pp 

OH  residents 


F^es 


II 


3146  Dorf  Pnvfl*  Dvyiort  Qrw  4S<4ie 


*»**•♦#♦***#* ********^ 


TM 


This  MFJ-202  RF  Noise  Bi^ge  lets  you  qmckfy 
adjust  your  single  or  muitttjaml  dipole.  inverted 
Vee.  Deam,  veriical,  mot)ife  whip  w  random 
system  for  maximum  pertofmance. 

Tetis  r^sofiant  frequency  and  whethef  to  shorten 
or  lengthen  your  antenna  tor  mmimuFn  SWR  over 
any  portion  oi  a  band 

MFJ's  exclusive  range  extender,  expanded  ca- 
pacitance range  (  ±  1 30  pf)  gives  unparafleled  im- 
pedance measurements,  1  to  100  MHz.  Simple  to 
use,  Comprehensive  computer  proven  manual. 

Works  with  arty  receiver  or  transceiver.  SO  239 
conoectors.  2x3x4  inches   9  volt  battery. 

Other  uses:  tune  transmatctt;  adjust  tuned  cfr 
cuits;  measure  inductance.  RF  impedance  of  ampli 
tiers.  ba!un5.  transfomiers:  electrical  lerigth.  velo- 
city tactor,  fmpedar^ce  of  coax;  synthesi?e  RF  im* 
pedances  with  transinatch  and  dummy  load 


Ortfer  from  WFJ  and  try  rt  —  no  obligallon.  Tf 
not  delighted,  return  tt  within  30  days  tor  a  refund 
(less  shipping).  This  brkloe  is  uncondttionaHv 
guaranteed  for  or^e  year, 

To  order,  simply  call  us  ton  free  900-6 47^1 600 
and  charge  it  on  your  VISA  or  MaslerCharge  or 
mail  us  a  check  or  money  order  for  $59,95  plus 
£4.00  for  shipqinq  and  handling  for  MFJ  202. 

Put  this  MFJ  Noise  Bridge  to  work  improvirt^ 
your  antenna.  Order  from  hifFJ  or  see  dealer 


CALL  TOLL  FREE  ...    800-647-1800 


Call  601  323  5669  tor  technical  inlormatlon,  or- 
der/repair status.  Also  call  &01-323-586B  outskJe 
continental  USA  and  in  Mississippi". 

ENTERPRISES, 

INCORPORATED 

Box  494,  Mississippi  State.  MS  39762       / 


^wv«« 


**»***♦■*■#♦*♦••***## 


2300     MHz     VARIABLE 

ANTENNA  KIT    ^^^^^p^A^'^ 

^  ^^     i2  WASHERS 

31  SPACERS 
MOUNTING  BRACKET 
6*'  RG  174  COAX 
•F  CONNECTOR         •   35"  ROD 
SVz'  X  4"  P.V.C.  PIPE 
2  DRILLED  END  CAPS  •  HARDWARE 


POWER  SUPPLY 

KIT 


POWER  TRANSFORMER 
COURSE  TUNE  POT. 
FINE  TUNE  POT. 
3'F  CONNECTORS 
RESISTORS  &  CAPS 
LED  WITH  HOLDER 
TERMINAL  STRIP 


P.O.  BOARD 

RF  CHOKE 

KNOB 

WIRE 

2  SWITCHES 

4  DIODES 

LM  317  REG. 


Complete 

Down  Cor^verter 

System 

INCLUDES 
ANTENNA  KIT 

powEft  suFrir  Kii 

CONVERTER  HIT 

SPECIAL  $49.95 


WOOD  6RA1II  CABINET  WITH  StLK 
SCREENED  rront  and  back  $10.95  Extra 


BUILT  POWER  SUPPLY 


$34J5 


QUANTITY 

DISCOUNTS 

Any  Price  in  Adv. 


10    pC5. 

25  pes. 
50  PCS. 
100  pa. 
1000  p» 


12%  off 

ia%  0fr 

25%  «ff 
30%  off 
35%  oft 


No   Mfiihg   for 
Qiuntlly  Qiicount 


DOWNC 

PARTS 

Converter  P,C-  Board 
Plated  through  holes 
for  stability. .$4.95 

Power  Supply 
P.C.  Board  2,95 

MRF  901  .»„...2,00 

2835  Diodes 95 

.001  Chip 

wopS*    •»■*■»•*■*    11//  Jh^tD 

Choke  Set  of  4 .1.95 

LM  317  Regulator  125 
'P  Connectors 

Wall  Transformer 
12  VAC  700  MA...4.95 

35 


ON VERTER 

CONVERTER 

KIT 

s 


»1i*H*«+«t»tT-1  FT-f 


'U'  Bolt 
BALUN 

75  to  300  ohm 1.95 

BALUN 
for  rabbit  ears,...2.95 

*RG  59/ U  COAX 

WFTH  CONNECTORS 

FACTORY  MADE 

100  Ft.  $17.50 

50  Ft.  9.50 

25  Ft.  5.75 

3  Ft  2  50 


P.C.  BOARD  PRE-DRILLED 
SOLDER  PLATED  WITH 
PUTED  THROUGH  HOLES 
FOR  A  MORE  STABLE  PIC- 
TURE. iV^4^" 

2  HP  2835  Diodes 

6  .001  Chip  Caps. 

9  Resistors 

4  Prewound  chokes 

I  Electrolytic  Cap, 

1  Pre  Made  Probe 

«r  WIRED  P.C.  BOARD  TEST- 
ED, READY  TD  CONNECT  TO 
CAN  WITH  PROBE  &  CABLE 
CONNECTOR  ATTACHED. 
$24«iS 


We  will  tune  conver- 
ter board  for  $12.50 

trouble  shoot 

trouble  shoot 
power  suppty..$12.50 

plus  tny  parts  netdfrd 


We  wtlJ  flcctpl  collKt  calli  lor  or6^i%  on^y  on  VfS«  ind  M«stef  Card 

Mo  C.0.0.  0rd«ri 
To  Of^«r  Ctll  t-317'255  7776— for  information  ctU  317-Z91  7262 

C&ni^Me   IH   Waigfi]    5   poumfi,    Pl«aa*  aM   Siifftciwrt   fMtiffa 

6950  NORTH  MICHIGAN  ROAD 
INDIANAPOLIS.  IN  46268 


ELECTROniC 

RmnBOUi 


t^S&e  List  of  Advertisers  Of^  page  1 N 


73  Magazine  •  June,  1982    79 


look  here 


call  toll  freemights 
1*800-231  3057 

ITEX,  RES.  Call  Collect  7-10  PM  CT 
M.W.F,  1-713-721-7920) 

days  1-713-658-0268 


YAESU 


ICOM 


FT1     _  .  2395.00 

FT902DM  1249.00 

FT101ZD/Mafk3  749.00 
FTZOeR/TOSa  289  OOea- 
IC3AT  IC4AT  269  00ea. 


IC25A   ,. 309  00 

IC730 Call 

IC2AT    ,,,...  249  00 

IC22U    269.00 

ROBOT 

eOOA  (+  fiebare)     749.00 

400A  (+ Rebate)     675.00 

KLM 

KT34XA    469  00 

KT34A 309.00 

144^14816C   .,.    89  95 

DRAKE 

TR5    .........     995.00 

TR7A            ...   1496-00 

R7A                      1450.00 

AEA 

CK*  115  00 

CK2 89.00 

MBA  RO 26a00 

MBA-RC       ,       -349  00 

ROCKWELL 

KWM380   ....  2795,00 

COLLINS 

HiS/N.  Mods  ,.,....,. 

Accessories  1 0%  Off  List 

KENWOOD 

Complete  Line    ...   Call 

AIVlPHEIMOLSifverpl3?ePL259  .    1.00 

SAXTON 

450  OHM  Open  Wire 

Ladderline    .  ,    20C/ft 

BELDEN 

9405.8214,9258.8267 

9251  RG  BA/U  45  C/ft 

HAL 

CWR685A 

+  Keyboard    .   875.00 

CT2100 699.00 

KB2100    ......   159.00 

World  Radio  TV  Handbook 

16.50  ppd.  UPS 

HYGAIN 

TH7DX    .    .._.  349  00 

10%  Off 

Curtis,  Shervwxxt  Palomar 

BUTTERNUT  HF6V  Vertical    ..    100,00 

TONNA 

F9FT,  9  EL  2  Meter  30  00 

KANTRONK 

I  Mini  reader  -  -       249.00 

MicroRTTY  ,...  249,00 

ANTIQUE 

Rare  Tubes    .....    Catll 

MOSLEY 

Antennas  ... Call! 

MASTERCARD     VISA 
All  prices  fob  Hcusion  except  wtieie  indicated  Prices 
sul>j«c$  to  charmv  without  nociee,  all  itema  gy^rant&ed 
Some  itmns  subject  prior  sale  Texas  rasi^ents  add  6% 
tAx  PkASG  add  suflc&i«m  poaei^.  bAloncs  collect 


Electfonics  Supply 

1508McKinney 
Houston,  Texas  77010 


Free  UPS  shipping 

on  orders  over 

$100,00 


2  locations  open  Mon-Sat 

10  am  "11(6  pm 

Thurs  &  Friday  'til  9  pm 


Mich.  res.  add  4% 


^KENWOOD 

R.  L.  DRAKE 


nisir 


TEN-TeC 


MFJ 


AND  »^ORtl 
CALL  FOR  QUOTES 


RSE 


HAM 
SHACK 


2  locations 
1207  W.  14  Mile  Road,  Clawson  Ml  46017 

'      313-4355660 
31155  Plymouth  Road,  Livonia  Ml  48150 

313-5224232  i^i'7 


Introducing 


Mobile  Connection 


YOUR  OWN 
AUTO  PATCH  FOR 
SIMPLEX  OPERATION 


ONLY 

$169^^ 


KIT 


Wired  and  Fuity  Tested 

$219.95  •  Shipping  $3,50 
m  USA.  •  N.Y.S. 

Residents  add  appropriate 
sales  tax 

Hundreds  already  in  operatJon  *  Call  anyone'-anywhefe^anytiirie 

NOVAX  interfaces  ycwjr  standard  2  rr^ter:  220;  450;  etc.  base  statjon  arxl  DTMF 
(Toucmone)  Telephone,  using  a  high  speed  scan  switching  technique  so  that  you 
can  direct  dial  from  your  aulorr>obile  or  with  the  HT  from  the  backyard  or  poolside 
—automatically  Easy  inslallation  Rtngback  ireverse  autopatch)  option  available 
tor  S29  95  kJt-S39.95  lactory  wired. 


•  SMALLSIZE-(5"x6"x21 

•  STATE  OF  THE  ART 
CIRCUITRY  12-16  V  DC 

•  ADJUSTABLE  ACTIVITY  TIMER 
(clears  out  if  mobite  ts  out  ot  range) 


•  EASY  INTERFACING  with  radio  audio 
&  squek^h  circuit 

•  SINGLE  DIGIT  CONTROL 
(connect  and  disconnect) 

•  3  MIN  CALL  DURATION  TIMER 


TO  ORDER— SEND  Check— Money  Order  (MasterCard  or  Visa  accepted)  to: 
R.W.D.  Inc..  Ortskarty,  N.Y.  13424  or  call  (315)-829-2785  ^  j. 


80     JSMagazine  •  June,  1982 


GOTHAM 
ANTENNAS 

(305)  294-2033 

SMALI.L0TTRARDIPOLES 


MOOEL 
TSL  &04D 


BANDS 
SO  40 
40.20.15 


LGTN 
40 


PRICE 
S4§  9S 
547  95 


SMALL  LOT  SHORTENED  O^POLES 
SLBOTO 


SL  16<? 

SL  ao 

SL'4a 


eO  40,20. 
15  10 
i«0 
SO 
40  TS 


75' 

130 
53' 


559  95 

$36  95 
S3S§S 
$34  95 


FULL  S«2E  PARAiLEt  DfPOLES 
FPDdDlO      S0.4[^20  13Q 


tSJO 
FPP4010       40.20  15,10        63 


S49  95 

S44  9S 

N£W^  PORTABLE  VERTICAL'  lOEAL  FOR 


APARTMENTS  CAMPING   TRAlLEHSf 

Folds  1o  5'  Pacha^ge    No  R^dials,  Requ^ri^di 
FuHy  Assembled   Fud  Legal  Limit.  It  VSWR 

MODEL  BANDS  HGHT         PRICE 

PVaOlO         80  10  13  SEi9  95 


PROVEN  DESIGN 
VERTICALS 

V  160 


GOTHAM  ALL  BAND 


VdO 
V4^ 


V&oa0  40  2D.    23 
tS  10.6 

80  40.20  23 

tb  10  6 
40.20-1510  6    23 


«3§95 
t3S9% 


FAMOUS  GOTHAM  QUADS 
^     2  Elpmvnii  —  3  Bafids  Compl«t?  ST  19  95 
CHAMPIONSHIP  GOTHAM  SEAMS 
Fyll  Sif #  Comptele  from  S79  95 
DEALER  tHQummS  tHVnBH 

CALL  OR  SEND  LARGE  SASE  FOR  CATA 
LOG  SHtpping  Dipoi^^  A  Verticals 
S2^USA  S7  OOC^ndda.  S5.00  FPO  APO 
S«3ms  &  Quads  Shipped  UPS  or  Freight 
Cottrcl  Fia  iddt^  §»t#^Tai 

1415  First  St.  •  Key  West,  FL  33040 


MFJ-1200  GENERAL  PURPOSE 

CW  Computer  Interface 

Connects  computer  to  transceiver.  Converts  received  audio 
to  TTURS-232.  Allows  computer  to  key  transmitter.  For 
use  with  your  computer  and  CW  Keyboard/Reader  program. 


At  tows  your  rig  to 

"talk  Cl¥"  to  your 

computer  anti  vice  versa. 


A  personal  computer  with  an  appropfiate 
program  can  give  you  a  complete  and  very  ver- 
satile CW  Keyboard/Reader.  But  you  still  need 
interlace  electronics  to  provide  compatible  signals 
between  your  transceiver  and  computer 

Ttie  MFJ-1ZQQ  CW  Computer  Interface  pro 
cesses  (noise  fjmits.  tillers,  delects,  posi  fiffers, 
stia|}es,  level  smtts}  trie  received  CW  audio  from 
your  transceiver  to  provide  a  clean  cofBputer 
COfftoatible  TTL  or  RS  232  level 

it  also  takes  the  keyt^oard  generated  CW 
(TTL  Of  RS-232  output  (evei^)  Irom  your  ctrniputm 
and  dri^res  tii^h  vollage  keying  eircuits  to  key 
your  tutie  or  so^id  state  transmitter  (-300  V, 
10  mA  max:  -I- 300  V.  100  mA  maK). 

Has  tuning,  transmit,  and  "OH"  LEDs.  Reverse- 
normaf  switch  inverts  output  level  to  computer. 
ON/OFF  switch.  6x1  f'4x3  m  Black,  eggshell  wrule 


aluminum  cabinet.  Requires  6-9  VAC  or  110  VAC 
with  npflonaf  AC  adapter.  MFJ13GgAC.   $9Sf^ 

Order  Irom  MFJ  and  try  it  -  no  ottligatlon.  If 
nol  delighted,  return  it  within  30  days  lor  relund 
(less  shipping).  One  year  ur^conditional  guarantee. 

Order  today.  Call  toll  free  800  647  1800.  Charge 
VISA.  MC  or  mail  ct>eck.  money  o:def  lor  $69  9 'j 
lor  MfJ  1200  ^lus  S4,00  shipping  and  handling 

Use  this  lAFJ'IZOO  to  enjoy  your  computer  a^3 
a  CW  Keyboard/Reader  CaN  MF  J^of  see  dealer 


CALL  TOLL  FRS  . . .   800-647-1800 


Cati  601  323  5869  tor  technol  inlofTnalion    of 
der/repair  siaius.  Also  call  601  323  586*3  mii^ 
contmentai  USA  and  in  Mississippi  ^az 

ME.  I  ENTERPRISES, 

IWirW  INCORPORATED 

Box  494.  Mississippi  State.  US  39762 


LB-VHF-UHF 


SOON  TO  BE  FCC  TYPE  ACCEPTED 


AMATEUR  DISCOUNTS  AVAILABLE 
SUPERIOR  RECEIVER  AND  TRANSMITTER  SPECIFICALLY 
DESiGNED  FOR  REPEATER  SERVICE. 

ADJUSTABLE  TRANSMITTER  POWER,  FROM  1  TO  25  WATTS 
MINIMUM  OUTPUT  WITH  EXTREMELY  COOL  OPERATION.  - 
AUTOMATIC  BATTERY  SACK  UP  SYSTEM  CAPABILITY  WITH 
BATTERY  CHARGING  AND  REVERSE  POLARJTY  PROTECTlOf^ 
-  NOWWITH  A  FULL  COMPLIMENT  OF  INDICATORS  AND  STA- 
TUS  LIGHTS  —  100%  DUTY  CYCLE  —  ADVANCED  REPEAT^ 
ER  SQUELCH  SYSTEM  NO  CHOPPJNG.  POPPING,  Oft  ANNOY- 
ING REPEATER  KEY  UPS  DURING  LIGHTNING  STORMS.  ^  DIE 
CAST  ALUMINUM  R.F  ENCLOSURES  —  SMALL  SIZ£5»i  X  IS  X 
'--      -  HIGH  QOALrTY  LONG  LtFE  DESIGN 


I 


RECEIVER  AND  TRANSMITTER  ^°™ "\l°so^^7«Lf ,n  m ™"S 


SMALL  SIZE 

•3  7/8x6  t/8" 
LOW  COST 


'4G 


HI  PRO  TRANSMITTER 

DESIGNED  FOR  REPEATER 

SERVICE  WITH  EXCELLENT 

AUDIO   STABILITY, 

HARMONIC  REJECTiON, 

AMD  LOW 

SIDEBAND   NOISE 

ADJUSTABLE 

POWEH 

OUTPUT  - 

UP  TO  5  WATTS 

FROM  THE 

EXCITER  BOARD. 

COOL  OPERATION 


THIS  EXCITER  IS  USED  TO  DRtVE  THE  HI  PRO  25  WATT 
POWER  AMPLIFIER  AND  BOTH  ARE  AVAILASLE  KIT 
OR  ASSEMBLED 


MAGGIORE  ELECTRONIC  LAB. 


Ht  PRO  RECOVER 

THIS  RECEIVER  IS  THE 
HEART  OF  THE  REPEATER 
AI^D  BOASTS  SUPERIOR 

squelch  action  needed 
for  this  type  of 

SERVICE    EXCELLENT 
SENSITIVITY.  STABILITY 
AND  SELECTIVITY, 

use  THIS  RECEIVER 

TO  REPLACE  THAT  ''^ 

TROUBLESOME  RECEIVER 
IN  YOUR  PRESENT 
REPEATER    EASILY  ADAPTS 
TO  ANY  SYSTEM 

WRITE  FOR  COMPLETE  SPEClFlCATiQNS  ON  OUR 
FULL  LINE  OF  ACCESSORIES  AND  LOWER  COST 
Ml  PRO  f^K  I  REPEATERS 

590SNYDEfi  AVE. 

WEST  CHESTER,  PA.  19380 


SMALL  SIZE 

37  flu  61/8 

LOW  COST 


TELEX: 
499-074 1-MELCO 

PHONE  215-436-6051 


Sen?  Lnt  of  Aoveftihefs  on  aagB  1 14 


73  Magazine  •  June.  1982     81 


RAC 


TRAC*ONE  +  DELUXE 
CMOS  KEYER 

$119.95 


Features: 


Model  IE  464 


'  True  CW  signal  reproduc r ion— Single  stgnaJ  recep- 
lion 

'  Removes  aEl  QRW  and  QRN 

"DJQS  out  CW  signal,  decodes  it  with  Phased  Lock 

Loop  Tone  Decoder  then  reproduces  it  with  full 

operatof  control  over  Gain,  Freq.  Tone.  Delay. 
'All  controls  on  front  panel 
'Ffeq  controi  variable  300  Hz  to  2500  Hi  will  match 

any  rig. 

'LEtD  flashes  during  decoder  operation 
"Operates  In  line  with  rig  audio — leave  In  line  on 

OFF/BYPASS 
'Buill  m  speaHer 
'Headphones  jack  rear  panel 
'Bauery  or  AC  adaptor.  9VDC  operation 

PLUS: 

"  Deluxe  CMOS  Keyer—  Static  I' ttie-art"  CMOS  cir- 
cuitry 

'Self-compJeting  dots  and  dashes 
*Both  dot  and  dash  memory 
Mambic  keying  with  any  squeeze  paddle 
*5-50  w.p.m. 

'Speed,  Volume,  Tone,  Tune  and  Weight  controls 
"Stdetone  and  speaker 
*  Semi -auto  swdch  foi  bug  or  straight  key 
"Deluxe  quarter-inch  jacks  lot  keying  and  output 
"  Keys  grid  block  or  solid  stale  rigs 


#  ##..# 


TRAC*ONECW 
PROCESSOR 


$89.95 


Features: 


Model  TE  424 


'True  CW  signaj  reproduclitn— Single  signal  recep- 
tton 
^Removes  all  QRM  and  QRN 

"Digs  out  CW  stgnal^  decodes  it  with  Phased  Lock 
Loop  Tone  Decoder  then  reproduces  It  with  luii  op 
eraior  conirol  over  Gain,  Freq,  Tone,  Deiay. 

*AI!  controls  on  front  panel 

■  Freq  control  variable  300  Hi'  to  2500  Hi  wUI  n^atch 
any  rig 

•LED  flashes  dunng  decoder  opera h on 

^Operates  In  line  with  rag  audio — leave  in  hne  on 
OFF/BYPASS 

*BiiiitHn  Speaker 

*  Headphones  Jack  rear  panel 

"  Battery  or  AC-adaptor.  9  VDC  operation  ^ ^6 

SEND  FOR  BROCHURE  ON  OUR  FULL  PRODUCT  LINE 

ELECTRONICS,  INC. 
1106  RAND  BLDG. 
BUFFALO.  NY  14203 

(716)852-8188 


RAC 


PC3WER  UPT 


2  METER  90  WAH  OUTPUT 

AMPLIFIER  WITH  18  DB  GAIN  PREAMP 


Model  90PL 
FOR  ONLY 

FACTORY  DIRECT 


$ 


1 39.95 

PLUS  SHIPPING 


100 

POWER  MEASUREMENT 
ATiaaVDC 

PQ 

B  SO 

I 

i* 

h* 

1 

■ 

* 

z 

►^  60 

« 

■ 
■ 

£50 

H 

-■ 

■ 

2« 

1 

■ 

1 

130 

w 
u 

S2O 

■ 
* 
* 

to 

• 

■ 

y 

r 
1 

•  FREaUENCY  r^ngB  H4  ^  14g  mi 

•  OPEFIATION  FM  or  SSB  (completely  linear^  Class  ABl 

•  RF  DRIVE  I  m  3Q  mm 

m  KEYING  RF  aLEivated  with  high  queiity  cfilay^ 

•  SSB  Djje ration  huilL  In  delay 

•  POWER  REQUIREMENTS  lypical  10  watts  dri^«,  13  amps  a\  13 fl  VDC 

•  IDLE  curreni  20  rthili; 

•  MOBILE  or  FlKED  operaiior^ 

•  PREAMP  T8DB  gain  minimuin 

•  NOISE  FIGURE  less  than  \b  DB 

•  PREAMP  KEYtNG  inde pendent  —  saparately  RF  activated  rsEays 

•  CONSTRUCTlDN  wrap  around  altjmmum  heat  sink  2  pieces 
3'60  degrse^  DQQlm§ 

m  SIZE  7"\w\  jf  B"\i\  X  3 '(h)  -  WEIfiHT  3  lbs  9  en 

•  IMMEDIATE  SHIPMENT 


SPECIAL  OFFER 


9  V « V  3 


Matching  Power  Supply        plus  shipping 


1   2  3  4  5  6   7  S  9  10 
POWER  INPUT  IN  WATTS 

POWER  CHART 


15  AMP  SUPPLY  wt,  T3  Ihs  s.;b  S"[wf  x  5"(l)|  x  6"(d) 

LMHIEDLATE  SHIPMENT 

ALL  PARTS  AND  LA6DR  WARRAHTEG  ONE  FULL  YEAR 

VJ90PI  Amplifiai  %M^M  plus  »3.0D  shippftifl 
VJ1&  POWER  Supply  «99  9B  plus  «7.QQ  shippiiig 
■Prices  USA  only 


VISA.  MASTER  CHARGE,  M.O.  or  C.O.D.  •  PHONE  (713)  477-0134 

V-J  PRODUCTS,  INC.  bob  East  Shaw,  Pasadena,  Texas  77506 

SERVING  THE  ELECTRONICS  INDUSTRY  SINCE  1965 


NEW 

MORSEMATIC™ 
-2  KEYER 


NEW ---$139,95 


THE  MORSEMATIC  KEYER  BY 
AEA  HAS  BEEN  PROCLAIMED 
BEST  OF  ALL  PADDLE  KEYERS 
ON  THE  MARKET 


Mow  you  can  get  all  the  features  of  the  world's  first  and  still  best  mlcrocQinputerized 
keyer  at  a  30%  redtictton  in  price.  The  new  model  MIVI-2  ha$  all  the  outstanding 
features  of  the  MM-1  predecessor  such  as  dual  microcomputers  with  copywritten 
software,  500  character  soft-partitfoned™  memory  with  editing,  exclusive  beacon 
mode,  exclusive  automatic  speed  mcrease  trainer  mode,  and  exciusive  automatic 
serial  number  generator  In  addition,  the  MM'2  comes  complete  with  CMOS  memory 
an^  provisions  for  internal  memory  keep  alive  battery.  The  MM-2  operates  from 
external  12  VDC  at  approxiimately  350  Ma. 

ACCESSORIES: 

Modei  AC-1  600  Ma  12  VDC  Wall  Adaptor $14.95 

Model  ME'2  Memory  Expansion  (2000  Totat  Morse  Characters] $39,95 

If  you  have  hesitated  buying  the  best  because  of  price,  you  need  to  waft  no  longer, 
the  best  is  now  available  in  an  improved  form  at  a  price  you  can  afford. 

PRICES  AND  SPECiFICATlONS  SUBJECT  TO  CHANGE  WITHOUT  NOTICE 


call  or  visH; 


AEA 

Brings  you  the 
Breakthrough! 


Neiv  Jersey's  Largest  Ham  Store 

Radios  Unlimited 


1 760  Easton  Avenue 

Somerset,  N.J.  08873 

(201 )  469-4599 

(800)  526-0903 


^}0S 


82     73Magazine  •  June,  1982 


f' 


HAZER 

TOO  OLD-TOO  SCARED-T(X:)  TIRED 

TO  CLIMB! 

m  RAISE  OR  LOWER  ANTENNA  TO  GRODND 
LEVEL 

■  SIMPLE  AND  EASY  TO  INSTALL  AND  USE 

■  MADE  OF  606 1  STRUCTURAL  ALUMINUM 

■  FOR  ROHN  20  AND  25  TOWF-RS 

■  COMPLETE  WITH  WINCH,  CABLE,  HARDWARE 
&L  INSTRUCTIONS 


81&882'2734 


MARTTN  h:Kt"}L^:LERlNC. 

?:0,  BOX  253 

ROON\aiJLE.  MO  652  n 


*F1US  FKEIGHT,  &l  TAX  TOWTI^  ROTATOR.  ANT ^NOT  INCLUDED 


i^  \34 


^m^mtm^ 


A  TRUE  STATE-OF-THE-ART 
COMMUNICATIONS  TERMINAL! 


NEW 

M-500 

ASR 

from 

INFO-TECH 

$1475.00 

(with  12"  Monitor) 


$180.00 

MEMORY  EXPANSION  BOARD 
(10K  of  Memory) 

f6T  use  by  amateur  radio  operators  in  the 
tjansmission  and  receptiorr  ol  RTTY  (ASCII  & 
Baudot)  and  Morse  code.  Microprocessof  con- 
trolled with  20K  of  memory  (8K  ROM,  8K  RAM, 
4K  video  RAM). 

User  programmable  messages.  Sel-CaL 
WRU,  mailbox,  real  time  cEock.  large  running 
buffers,  buffers  for  printers,  basic  word  pro- 
cessing for  on-screen  editing^  lull  and  half 
duplex,  cassette  tape  interface,  split  screen 
formats,  ASCN  or  Baudot  printer  outpuls.  auto- 
start, push  to  talk,  accessory  switches,  provi- 


Order  direct  or  from  these  dealers. 


(contains  mailbox  systems) 


siors  for  Dattery  back-up.  many  other  features. 
The  M'50O  consists  of  three  parts; 

1.  KEYBOARD.  Connected  to  mainframe  by 
5-ft,  umbilical  cord  for  maximum  operating  flexi- 
bility, Entire  system  keyboard  controlled. 

2.  MAIN  FRAME.  Houses  95%  of  the  elec- 
tronics, all  I/O  jacks,  power  supplies.  modulaEor, 
demodulators.  Metal  Irame  cabinet  is  table  top 
or  rack  mounted. 

3.  12"  VIDEO  MONITOR.  High  qualtty  to  insure 
undistorted  video,  provide  llexibitity  lor  operat- 
ing position  placement. 


Csfnon 

5640  S.W.  1 16th  Ave 
Miamf.  Florida  331/3 
(305)  271-3675 

CDtmav  Pl-otiucts 

14903  Beach  view  Ave. 

W^ite  flock.  B.D..  Canada  V4BlNa 

(604)  536-a05fi 


Dialta  Ama^tsur  Radio  Supply 

1^2  Am  St. 

Rapid  Ciiy.  Souti  Oakota  S770t 

(605)343-6127 

ElBctronJc  Equipmant  Bank 

5.15  Mill  St. 

Vienna,  Virginia  22180 

(703)  938  3350 


INFOTECH 


ELECTRONIC 
EQUIPMENT 


DIGITAL  aSCTRONIC  SYSTBVIS,  INC. 

1633  Wisteria  Court «  EngtewDod,  Flomle  33533 
81^74-9518 


|jj}f&r  As^Dttates,  Inc. 

52  Park  Ave. 

Park  flidfle,  Neiw  Jersey  07656 

(201)391-7697 

Global  CDitirnunications 

606  CCKiOa  lEles  Blvfl. 
Cocoa  Seacii.  Florida  32931 
(305)  783-3624 

Ham  Radio  Center 

8343  Olive  8lvd. 

St  Louis,  Missouri  63132 

1-800-325-3636 

Msmphii  Amateur  EFectronics 
t445  Wells  Si atJon  Rd. 
Memphis,  Tennessee  38106 
1-B00'23B-616B 

Michigso  Hacfta 

.38270  Mast 

Ml.  Clemens.  Micliigan  ^8045 
(313)  469-4fi5B 


N  &  G  DJstribLJttng 

7201  NVV  ISTi  St. 
Miami,  Florida  33126 
j305)  592- 9685 .  763-8170 

Radb  World 

.T&rn-midl  Building 
Oneida  Couftry  Airport 
Oriskany.  New  York  13424 
[31SJ  736-0470 
t-a00-44B-9338 

Ray's  Amateur  Radia 
1590  U.S.  Highway  19  South 
Clearwater.  Florida  33516 
1813)  535-1416 

Universal  Amateur  Radja 

1280  Aid  a  LY 
Reynoldsburg,  Ohio  43068 
[614)  fi66-4267 


MFJ  KEYERS 

Uses  Curtis  8044  IC.  Iambic 
operation,  dot-dash  memo- 
ries, weiglit  control,  solid 
state  keying.  RF  proof. 


The  MFJ'40B  Deluxe  Elecfronlc  Keyfii*  sends 
iambic,  automatic,  semi  automatic,  manual.  Use 
squeeze,  single  lever  or  straight  key. 

Speedmeler  lets  you  read  speed  to  100  WPM 

Socket  for  external  Cuilis  memory,  random 
code  generator,  keyboard,  Optional  cable.  $4.95, 

Iambic  operalion  with  squeeze  key.  Dot  dash 
insertion.  Semi-automatic  '*hug"  Dperation  pro- 
vides  automatic  dots  and  manual  dashes. 

Dot-dash  memory,  self  completing  dots  and 
dashes.  iam-proo1  spacing,  instant  start.  RF  proof. 

Solid-stafe  keying:  grid  block,  solid  state  Kmtrs. 

Front  panel  controls:  Imear  speed,  vv eight, 
tOTie,  volume,  lunction  switch.  8  to  50  WPM. 

Weight  control  adjusts  dot  dash  space  ratio; 
makes  your  signal  distinctive  to  penetrate  QRM. 

Tone  control.  Speaker  Idea!  for  classroom. 

Function  switch  selects  off,  on,  semi  automatic/ 
manual,  tune.  Tune  keys  transmitter  for  luntng. 

Uses  4  C'Cells.  2  5  mm  jack  for  power  (6  9 
VDC).  Optional  AC  adapter  MFJ  1305,   $9.95, 

Eggshell  white,  walnut  sides.  3x3x6  inches, 

MFJ-406,  $69.95,  like  408  less  speedmeter. 


$49 


95 


New  MFJ'401  Econo  Keyer  II  gives  you  a 
reliable,  full  feajure,  economy  keyer  for  squeeze, 
single  lever  or  straight  key. 

Has  sidelpne,  speaker,  votume,  speed,  internal 
weight  and  tone  controls.  Sends  iambic,  auto- 
matic, semi-automatic.  manuaL  Tune  tunction. 
Dot  dash  memories,  8  50  WPM.  "On '  LED.  Use 
9V  battery,  6  9  VDC.  or  110  VAC  wfth  optionaE 
AC  adapter,  MFJ  1305.  $9.95.  4>c2x3Vj". 

Reliable  solid  state  keying.  Keys  virtually  all 
solid  state  or  tube  type  transmitters. 


iTirTtFw-iBtTiinrW 


$C^95 


iKitft'      UF  J .  ^  ^ 


64 


See  List  of  Advertisefs  on  page  114 


MFJ-4a5  Econo  Keyer  fl.  Same  as  MFJ  401 

but  has  built-in  single  paddle  with  adjustable 
travel,  Also  jack  for  external  paddle,  4x2x3V?", 

Optional:    Bencher    Iambic    Paddle,    $42  95; 
110VAC  adapter,  MFJ  1305.  $9,95  Free  catalog. 

Order  from  MFJ  and  try  It.  If  not  delighted. 
return  within  30  days  for  refund  (less  shipping). 
One  year  unconditional  gwarantee. 
Order  yours  today.  Call  loll  tree  800-647-1  BOO. 

Charge  VISA,  MC.  Or  mall  check,  money  order. 
Add  $4.00  each  (or  sihipping  and  handling. 


CALL  TOLL  FREE  . . .  800-647  1800 


Call  601-323'5869  for  technical  information,  or- 
der/repair status.  Also  call  601^323  5869  out 
side  continental  USA  and  m  Missfssippl.    j^^? 

ME   I  ENTERPRISES, 

Iwll     W  INCORPORATED 

^  Box  494.  Mississippi  Stale,  MS  39762^ 


73 Magazine  •  June,  1982    83 


Crime-Stoppers'  Textbook 

rules  of  thumb  for  would-be  gumshoes 


Robert  C  Diefenbach 
2402  Uuderdaie  Driye,  HE 
Aftanta  CA  J034S 

NO  one  seemed  to 
notice  the  tan  car  that 
stopped  at  the  quiet  corner 
only  long  enough  to  drop 
off  a  tall,  casually  dressed 
young  man.  As  the  car 
drove  unhurriedly  away, 
the  young  man  began  walk- 
ing past  the  neatly  trimmed 
yards  looking  — carefully 
looking— at  each  house  as 


he  passed.  No  one  seemed 
to  notice. 

But  the  driver  of  the  car 
with  amateur  radio  tags  did 
notice,  and  a  few  minutes 
later  also  noticed  the  same 
tan  car  stopped  in  the 
shade  of  a  clump  of  low 
pine  trees  in  a  nearby 
church  parking  lot.  The 
car's  hood  was  raised.  Its 
driver,  standing  in  front 
with  one  foot  resting  on  the 
bumper,  was  making  some 
unseen  adjustment  to  the 


B.M,  Gray  II. 

84     73  Magazine  •  June,  1982 


idling  engine.  He  appeared 
impatient  as  he  glanced  at 
his  wristwatch 

Driving  past  the  parking 
lot,  the  ham  noted  the 
dented  left  front  fender  on 
the  tan  car  and  the  driver's 
blonde  hair  and  blue  foot- 
ball-style jersey.  And  more, 
By  the  time  he  pulled  his 
car  to  an  easy  stop  midway 
down  the  next  block  and 
reached  for  the  micro- 
phone clipped  to  the  dash- 
board, he  knew  exactly 
what  he  would  say  to  the 
police  dispatcher. 

It  took  only  moments  to 
place  the  call  through  the 
repeater  phone  patch. 

The  dispatcher's  voice 
was  crisp.  "Police  emer- 
gency," 

"I  want  to  report  a  suspi- 
cious car  and  persons  on 
Thomason  Drive,  I  suspect 
they  are  planning  a  bur- 
glary/' 

"Stand  by/' 

There  was  nothing  re- 
markable about  this  series 
of  transmissions  or  others 
like  it,  heard  infrequently 
on  the  amateur  and  busi- 
ness radio  bands,  except 
that  they  are  heard  very  in- 
frequently in  proportion  to 
the  potential  criminal  activ- 
ities witnessed  by  drivers  of 
radio-equipped  vehicles. 
Law-enforcement  agencies 
wish  fervently  that  there 
were  more  civilian  radio 
exchanges  tike  this  one. 
They  need  alt  the  help  they 
can  get. 

There  are  only  2.1  full- 
time  law-enforcement  offi- 
cers per  1000  US  citizens, 
according    to    the    latest 


figures  released  by  the  Fed* 
eral  Bureau  of  Investiga- 
tion. These  men  and  wom- 
en do  their  best  in  the 
face  of  an  alarming  in- 
crease in  serious  crime, 
but  they  are,  as  a  group, 
vastly  overworked.  Since 
1971,  property  crimes  [bur- 
glary, larceny-theft,  and 
motor-vehicle  theft)  have 
shot  up  54  percent  nation- 
ally. Violent  crimes  (mur- 
der, forcible  rape,  and  ag- 
gravated assault)  have  risen 
60  percent.  In  just  one  year, 
from  1979  to  1980,  burglar- 
ies and  robberies  rose  14 
and  18  percent,  respec- 
tively. 

As  federal,  state,  and  lo- 
cal governments  tighten 
their  belts  in  the  current 
wave  of  budget  and  tax  re- 
visions, there  is  not  likely  to 
be  much  — if  any  — increase 
in  the  number  of  profes- 
sional crime  fighters  in 
most  jurisdictions.  There  is 
a  clear  and  growing  need 
for  appropriately- con- 
trolled civilian  involve- 
ment. 

Special  Agent  Edward  J. 
Tully  of  the  FBI  points  out 
that  "there  has  been  a  ten- 
dency for  civilians  to  forget 
their  responsibility  for  ef- 
fective law  enforcement. 
Clearly,  police  departments 
cannot  do  the  job  alone/' 
Tully  is  acting  academic 
dean  of  the  FBI  Institute  in 
Quantico.  Virginia,  where 
police  officers  from  cities 
of  all  sizes  are  trained 
alongside  federal  and  state 
agents  and  policemen  and 
-women.  "Citizens  with  ac- 
cess   to    mobile    two-way 


radios,  or  ham  radio  oper- 
tors,  can  be  of  significant 
assistance/'  he  said. 

San  ford  H-  Smith,  a  lead- 
ing national  figure  in  public- 
safety  communications, 
agrees  wholeheartedly. 
"The  present  trend  in  our 
country  is  towards  self- 
help.  Increased  citizen  in- 
volvement in  law  enforce- 
ment is  a  natural  part  of 
that  trend"  Mr.  Smith  is 
Director  of  Communica- 
tions for  the  city  of  Greens- 
boro, North  Carolina,  presi- 
dent of  the  Land  Mobile 
Communications  Council, 
and  immediate  past-presi- 
dent of  the  Associated  Pub- 
lic Safety  Communications 
Officers,  Inc.  ''When  we 
feel  we  have  done  some- 
thing for  our  community 
and  our  fellow  men,  there  is 
a  huge  personal  reward," 
he  adds. 

When  the  FBI  and  any 
other  law-enforcement 
agency  solicit  civilian  help, 
they  are  definitely  not  sug- 
gesting that  the  civilians 
"play  policeman/'  That  is 
the  very  last  thing  authori- 
ties want  and  is  probably 
the  best  way  a  civilian 
could  pick  to  become  a 
part  of  the  problem  instead 
of  the  sotutionl  What  is 
wanted  and  needed  is  re- 
sponsible, reliable  observa- 
tion and  reporting  of  poten- 
tial or  actual  criminal  activ- 
ities, and  NOT  vigilantism 
or  other  unauthorized  di= 
rect  involvement 

Professionals  in  law-en* 
f  ore  em  en  t  communica- 
tions—  "sworn''  officers 
and  civilians  alike— agree 
that  radio-equipped  volur^ 
teer  observers'  reports  are 
valuable.  They  stress  that 
these  reports  are  more  valu- 
able when  the  observers 
have  been  trained,  even 
minimally,  by  their  local 
police  departments. 

The  concept  is  endorsed 
by  The  Crime  Prevention 
Coalition,  a  group  of  almost 
50  prestigious  national  or- 
ganizations whose  com- 
bined efforts  are  behind  the 
multimillion  dollar  'Take  a 


Bite  Out  of  Crime''  ad  vertis* 
ing  campaign.  B.M.  Cray  II, 
Director  of  Crime  Preven- 
tion, says,  "Surveillance  by 
drivers  of  two-way  radio- 
equipped  vehicles  could  be 
one  of  the  most  useful  citi- 
zen involvements  in  pre* 
venting  crimes,  particularly 
street  crimes,  from  occur- 
ring. Drivers  whose  radios 
give  them  the  ability  to  no- 
tify and  communicate  with 
the  police  without  leaving 
their  vehicles  — whether 
amateur  radio  hobbyists  or 
commercial  drivers  — can 
be  a  definite  asset." 

Why  the  need  for  train- 
ing? It  sounds  simple 
enough:  If  you  see  some- 
thing unusual  or  suspicious, 
call  the  police  That's  the 
basic  idea,  all  right.  But 
when  is  something  unusual 
Of  suspicious?  What  should 
be  reported.  How  should  it 
be  reported?  Police-direct- 
ed training  is  the  most  reli- 
able source  for  answers  spe- 
cific  to  each  community's 
needs  and  resources 

Most  police  departments 
are  anxious  to  work  with 
local  citizens  who  express 
interest  in  helping  them.  A 
letter  to  the  office  of  the 
Chief  of  Police,  volunteer- 
ing to  help  and  asking  to  be 
trained,  is  a  good  way  to 
start.  You  might  attach  a 
copy  of  this  article  as  a  way 
of  introducing  the  subject. 

The  amount  of  training 
police  departments  can 
provide  — from  informal  ad- 
vice through  classroom 
presentations  — varies  wide- 
ly,  depending  upon  the  re- 
sources available.  Under- 
standably, most  depart- 
ments will  devote  more  at- 
tention to  training  requests 
that  represent  bigger  poten- 
tial payoffs  — larger  num- 
bers of  reliable  radio- 
equipped  observers  on  the 
streets.  Several  ham  radio 
clubs  or  repeater  groups,  or 
the  owners  of  several  small- 
er firms  which  operate 
radio-equipped  vehicles, 
can  effectively  combine 
their  initial  contacts  with 
the  police. 


tii._-' 


F 

^'          ^^^^H 

K^^J^      .^^^^^^^P^ 

^^^^               ~    1              'w^^^^^^l 

^^■^m^^i                                                                        ^^^^^^^^^^H 

• 

v^-                 1 

.'  »J 


San  ford  R  Smith. 


What  Is  Unusual  or 

Suspicious? 

Deciding  what  is  unusual 
or  suspicious  enough  to  re- 
port to  the  police  calls  for 
subjective,  case-by-case 
judgment-  It  is  easy  to  err  in 
either  direction:  reporting 
inconsequential  observa- 
tions  or  failing  to  report 
meaningful  ones.  Detective 
jerry  Jaquenta  KA4NIA  of 
the  Boca  Raton,  Florida, 
Police  Department  bur- 
glary squad,  voices  the 
opinion  of  most  law-en- 
forcement professionals 
"We  would  far  rather  get  a 
dozen  or  more  false 
alarms  — calls  reporting 
what  turn  out  to  be  entirely 
innocent  events— than  risk 
missing  the  one  call  that 
does  involve  crime.  If  there 
is  reasonable  doubt  call!'' 

Detective  Jaquenta  lists 
these  examples  among  ob- 
servations he  thinks  should 
be  reported:  persons  — such 


as  obviously  truant  stu- 
dents—who are  obviously 
out  of  place  where  they  are 
observed,  perhaps  with  a 
screwdriver  or  gloves  stick- 
ing out  of  a  pocket,  some- 
one knocking  at  the  front 
door  and  moving  to  the  rear 
of  a  house  when  there  is  no 
answer,  and  occupied  cars 
or  trucks  parked  in  conceal- 
ment. 

"But  don't  be  guided  o^^ 
ly  by  a  person's  appear- 
ance/' cautions  Sanford 
Smith.  "It  is  a  subject's  ac- 
tions that  will  usually  tip  off 
a  good  observer/'  Persons 
who  seem  to  be  hiding,  or 
showing  nervousness  while 
loitering,  are  high  on 
Smith's  list  of  significant 
observations. 

"Any  sort  of  violence 
should  be  reported 
quickly;"  adds  David  N. 
Wise  N8CNY,  veteran  chief 
of  the  Michigan  State  Po- 
lice Department's  twenty- 
TSMsgazine  •  June,  1982     8S 


David  N.  Wise  NSC  NY. 


seven  communications  dis- 
patching locations-  "Whetiv 
er  it  is  as  obviously  criminal 
as  a  robbery  or  only  poten- 
tially so  — as  in  a  street- 
corner  shoving  match  that 
looks  as  if  it  could  become 
a  fistfight  — let  the  police 
know.  But/'  he  emphasizes, 
"do  it  from  a  safe 
distance!"  Exposing  your- 
self to  danger  or  violating 
the  law  yourself —  for  exam- 
ple, following  a  speeding 
car— isn't  just  foolhardy.  It 
is  dumb  I 

Police  dispatchers,  par- 
ticularly in  smaller  jurisdic- 
tions, soon  learn  whether 
regular  callers  are  reliable 
observers  or  merely  busy- 
bodies  If  you  remember 
the  old  tale  about  crying 
wolf,  you  will  agree  that  it  is 
best  not  to  get  the  latter 
reputation. 

What  Should  Be  Reporledl 

Public-safety  communi- 
cations  expert   Sanford 

86     73Mags2ine  •  JuneJ962 


Smith  lists  these  four  com- 
ponents of  an  observation 
report,  in  the  order  in  which 
they  should  be  given  to  a 
police  dispatcher, 

•  What  is  being  reported? 
Tell  the  dispatcher  immedi- 
ately. A  robbery  in  pro- 
gress? A  suspicious  person 
or  vehicle?  An  accident?  A 
fire?  A  potential  suicide? 
Knowing  what  the  basic 
problem  is,  the  dispatcher 
can  decide  what  public- 
safety  resources  may  be 
needed.  Radio  operators 
should  know  that  most 
police  departments  would 
rather  get  several  radio  re- 
ports of  a  serious  traffic  ac- 
cident than  not  receive  any 
because  each  passing  radio- 
equipped  observer  as- 
sumed someone  else  had 
reported  iL 

•  Where  is  it  happen /ng? 
Give  as  accurate  a  location 
as  possible.  Include  street 
names,  nearby  intersec- 
tions,   building    numbers, 


and    easily- recognized 

landmarks. 

•  Who  arid  where  are  you  ? 
The  radio  or  tetephone 
tink  between  you  and  the 
police  could  somehow  be 
broken.  Give  the  police  dis- 
patcher your  name,  exact 
location,  and  a  way  that  he 
or  she  can  get  back  in  touch 
with  you  if  you  are  discon- 
nected This  is  especially 
important  in  bigger  cities 
where  several  dispatchers 
are  on  duty  at  a  time.  Call- 
ing back  after  disconnect- 
ing, you  may  get  another 
dispatcher  and  have  to  start 
your  report  all  over  again. 

Ham  radio  operators, 
and  others  who  can  talk  to 
the  police  directly  through 
repeater  phone-patch  facil- 
ities, are  not  so  easily  re- 
contacted  if  the  patch 
times  out  or  the  connection 
breaks  some  other  way. 
Hams  should  ask  for  help 
from  another  amateur  mon- 
itoring the  frequency  from 
a  location  with  a  tetephone, 
and  that  telephone  number 
should  be  given  to  the 
police  dispatcher.  If  no  one 
else  is  on  frequency,  think 
of  some  other  way  the  com- 
munications link  might  be 
re-established  if  it  breaks. 
Be  sure  that  you  and  the 
police  department  both 
understand  how  the  re- 
contact  will  be  made. 

If  the  report  is  being 
made  through  a  taxi,  de- 
livery service,  or  other  busi- 
ness radio  dispatcher,  that 
business  dispatcher's  phone 
number  should  be  given  to 
the  police  dispatcher 

Some  law-enforcement 
agencies  will  insist  on  re- 
cording your  identity  —  as 
much  to  discourage  anony* 
mous  nuisance  calls  as  to 
add  to  their  record.  Others 
will  ask  your  name,  but 
treat  your  report  with  equal 
seriousness  whether  you 
give  it  or  not  While  some 
radio  operators  may  shrink 
from  getting  involved  in  an 
incident  they  observe  by 
identifying  themselves, 
they  should  realize  that  by 
giving  their  names  they  are 


assuring  the  police  that 
they  believe  in  the  accur- 
acy of  their  report. 

•  What  are  the  details? 
Your  eyes  may  fool  you. 
Simply  being  able  to  see  all 
of  the  details  that  occur 
during  an  exciting,  stressful 
event  can  be  difficult. 
Under  these  circumstances 
we  are  all  subject  to  a  phys- 
ical phenomenon  called 
tunnel  vision.  As  we  con- 
centrate intently  on  what  is 
going  on  in  the  center  of 
our  visual  field,  we  actually 
lose  a  great  percentage  of 
our  peripheral  — or  side- 
vision  Being  aware  that  this 
may  happen  to  you  will 
help  you  prepare  to  over- 
come  tunnel  vision  by  mak- 
ing a  conscious  effort  to 
look  around  the  central  ac- 
tion for  important  details. 

When  describing  per- 
sons, follow  this  standard 
sequence.  Leave  out  any 
item  you  do  not  know. 

1.  Name 

2.  Sex 

3.  Race 

4.  Age 

5.  Height 

6.  Weight 

7.  Hair 

8.  Eyes 

9.  Complexion 

10.  Physical  characteristics: 
marks,  scars,  limp,  etc* 

11.  Clothing,  from  head  to 
foot:  hat,  shirt,  coat, 
trousers,  socks,  shoes. 

When  describing  vehi- 
cles, start  with  the  color  or 
colors,  then  give  the  make, 
model,  and  as  many  give 
away  m arkings  —  accessor- 
ies, damage,  etc.  — as  you 
can  The  license  number  or 
any  part  of  the  number  can 
be  very  helpful  to  the 
police.  But  stolen  tags  are 
commonly  used  by  crimi- 
nals, so  an  accurate  descrip- 
tion of  the  vehicle  itself  is 
just  as  important 

How  Should  U  Be 
Reported? 

To  be  usefuL  reports 
must  be  made  calmly, 
clearly,  and  objectively. 
That  may  not  seem  too  dif- 
ficult when  you  are  describ- 


Lsgal  Issuos  In  Ctvllian  Surveillance 

Does  a  radio  operator  step  onto  danQerous  legal  ground  by 
making  reports  to  the  police?  Can  he  or  she  be  sued  for 
slander?  For  false  arrest?  Not  if  the  reports  are  accurate,  ac- 
cording to  Lewis  J.  Paper,  former  Associate  Counsel  of  the 
Federal  Communications  Commission,  now  In  private  prac- 
tice In  Washington,  DC,  "It  woufd  be  difffcult/'  he  says,  ''to 
conceive  a  situation  where  simply  reporting— accura^e/y  re- 
porting—what is  observed  could  expose  the  observer  to  any 
llabllllty." 

Attorney  Paper  recommends  that  as  soon  as  possible  after 
making  any  direct  or  indirect  verbal  report  to  the  police,  radio- 
equipped  observers  should  make  a  personal  written  record  of 
everything  seen  and  said  concerning  the  event,  and  then  save 
the  record.  If  made  whUe  memory  is  still  fresh,  this  document 
can  be  very  helpful  later  tf  you  are  ever  called  as  a  witness  in 
any  court  action  that  ensues.  You  can  be  subpoenaed  by 
either  the  prosecution  or  defense.  Your  record  itself  will  prob- 
ably never  be  caifed  into  evidence-  But  if  there  is— and  there 
frequently  Is— a  Jong  delay  between  the  event  and  a  trial,  it 
will  protect  you  against  a  lessening  or  loss  of  memory  that 
could  occur  before  you  are  asked  to  testify. 

"Although  most  states'  slander  laws  vary  in  detail,"  says 
Mr.  Paper,  "generally  a  charge  of  slander  must  be  based  on  re- 
porting information  which  the  reporter  knows  or  should  have 
known  was  false.  A  written  record— by  Its  very  exis- 
tence-will help  minimize  any  risk  that  you  will  be  accused  of 
intentionally  lying.'* 

Provided  you  have  accurately  reported  your  observations, 
according  to  Mr.  Paper,  you  have  no  liability  If  the  police  are 
charged  with  false  arrest  after  detaining  someone  as  a  result 
of  your  report.  "In  making  the  arrest  the  law-enforcement 
agency  assumes  the  responsibility  and  any  Hability  for  that 
arrest/"  he  says. 

Like  every  other  authority  contacted  In  connection  with  this 
article,  Mr  Paper  quickly  and  firmly  points  out  that  volunteers 
must  remember  that  they  can  expose  themselves  to  liability 
for  violations  like  trespass  and  assault  by  acting  as  if  they 
have  powers  which,  without  specific  fBg^f  authority,  they 
don't  have!! 


ing  a  minor  auto  accident 
on  the  freeway.  But  it  i$  dif- 
ficult when  actual  crime  or 
violence  is  concerned.  Even 
police  officers  have  had  dif* 
ficuity  making  proper  radio 
transmissions  under  emo- 
tionally stressful  circum- 
stances. Here  are  some  tips 
from  the  experts: 

•  Think  about  what  you 
are  going  to  say  before  you 
transmit.  Even  if  it  means  a 
short  delay,  compose  your 
message  mentally  to  be 
sure  it  is  accurate,  concise, 
and  in  the  sequence  that 
will  be  the  most  helpful  to 
the  police  dispatcher 

•  Keep  your  transmissions 
short.  Break  frequently  to 
allow  the  person  on  the 
other  end  to  interrupt. 

•  Control  your  voice. 
When  excited  or  upset, 
many  people  tend  to  speak 


faster  and  to  raise  the  vol- 
ume and  pitch  of  their 
voices.  The  combination 
makes  for  hard-to-copy 
radio  transmissions.  Listen 
to  yourself  Keep  your 
voice  as  close  to  normal 
as  possible. 

•  Avoid  subjective  words. 
Be  specific  in  describing 
what  you  see.  The  dispatch- 
er doesn't  know  what  you 
think  "a  bad  fight"  is  or 
what  "a  whole  bunch"  of  in- 
jured motorists  means. 

•  Speak  plain  English! 
Leave  the  "ten-this"  and 
"ten-that"  and  other  sup^ 
posed-to-be  police  jargon 
to  the  TV  heros.  The  few 
seconds  you  think  you 
might  save  by  using  jargon 
is  not  worth  the  risk  of 
being  misunderstood. 

•  Stay  at  your  radio.  Ex- 
cept to  render  whatever  aid 


Detective  Jerry  }aquenta  KA4NIA 


you  can  to  an  injured  per- 
son, you  can  be  more  help- 
ful by  being  keeping  a  com- 
munications line  open  be- 
tween the  police  and  what- 
ever action  you  are  observ- 
ing, 


Don^t  forget  the  impor- 
tant don'ts;  Dor^'t  expose 
yourself  to  danger!  Don't 
play  cop!  In  the  process  of 
trying  to  assist  the  police, 
don't  violate  any  laws 
yourself." 


I 


Mof^^fliM 


l/2-iize  (75M  only  W) 

MultKBand  (S,  4, 3  bands) 
eO/75M  thru  lOM 

Broadbandcd  *  no  traps  used 

Prices  start  at  $82.50 


THE  MOR-GAIN  HD  DrPOLES  are  Ihe 

most  advanced,  highest  pcrforinance  multhbaud  HF 
dipole  antennas  available  Patented  design  prcnides 
Jength  one- ha  If  of  convent  tonal  di  poles.  50  ohm 
feed  on  all  bands,  no  tuner  or  balun  reqyifed,  Can 
be  installed  as  inverted  VEE<  Tliousands  in  use 
worldwide.  22  models  available  including  two 
models  engineered  for  optimum  per formance  for  the 
novice  bands.  The  Mor  Gam  HD  dtpoles  N/1  series 
are  the  onl)^  commercial  antennas  specifically 
designed  to  meet  ihe  0[>eratio?iil  requirements  ol 
the  novice  license.  Our  l-jfe^r  warranty  is  tiacked  by 
nearljf  20  years  of  HD  dipole  production  eitperteflce. 

Far  detailed  I  Dupage  brochure,  wnte  or  phone 
directly  to  MOR-GAIN.  P.O,  Box  329T, 
Leavenivorth.  Hs.  66018,  Til  (913)  682-3142 


Md^cfiin 


4 


7$ Magazine  •  June,  1982    87 


SOCML  EVENTS 


UMtitfgs  in  this  column  am  provide 
free  of  charge  on  a  spAce-svattsot^  baBi&. 
The  fofiowmg  information  shouid  be  tn- 
Ciuti9d  in  every  snnouncemBnt:  sponsor, 
&\tefi(,  dfl/^,  time,  p/acrft,  City,  5  fa  I*,  at^mis- 
sfon  charge  (it  arty^,  features,  talk- in  fre- 
quefjcies,  and  fhe  name  of  whom  lo  con- 
tact for  further  information.  Announce- 
ments must  be  received  at  ?Z  MagaiJnei?K 
tfiQ  first  of  the  manth,  two  mQnth$  prior  to 
the  month  in  which  the  event  takes  place. 

SEASIDE  OR 

Ihn  North  Qoasl  Ft&peat«r  Assoctaiiof^ 
%n4  the  Oregon  Tualatin  Vail^  Amaleur 
Radio  Club  will  HoriJ  thfitr  Orsgon  Stale 
Ham  COfiv^ntton  oft  iuri«  4^,  1962.  at  the 
SeaiJdi  Convent mn  Center.  Seaside  OR. 
Hours  are  TZrOO  noort  to  5:00  pm  on  Friday, 
&!CIO  am  to  9:30  pm  or>  Saiurday,  and  S:DO 
am  to  2:00  pm  on  Sunday-  Registration  is 
$5.00  per  single,  S7  00  per  couple,  and 
$1  00  for  children.  SerriLn^F$  will  include 
receiver  design,  conatrgctlon,  satellite 
sarlii  stations,  contests,  and  rnany 
Others.  The  banquet  speaker  will  be  a 
NASA  Space  Shuttle  astronaut  and  mas- 
ter of  ceremonies  will  be  Mel  Ellis  K7A0Z. 
Vice  Director  ARRL  Northwesi  Oivigion. 
The  banquet  cost  is  St 2 50  per  person^ 
Talk-m  on  146  62  and  t*6,*5  (-600)^  For 
more  infomialion,  write  Doc  McLendon 
WTGWC.  PO  aoK  920.  Seaside  OR  97132. 

SAN  OlEGO  CA 
JUN  4-« 

The  San  D+ego  Coanly  Amaleyr  Radio 
CouncH  and  tt>e  San  Diego  Computef  Soc^ 
ety  wUi  ho\d  Hamcomp  82  on  June  4-€, 
1982.  at  the  Town  &  Ckxjntiy  Convention 
Center,  San  Diego  CA.  Reg  r  stmt  ion  Is  S7.00 
and  I  tie  Saturday  evening  banquet  featur- 
ing speaker  Roy  Neal  K6DUE  Is  $15.00. 
There  will  be  technical  sessions  all  day  Sat- 
urday, ham  and  computer  £]ooths,  many 
priies  and  awards  (including  a  main  prize  of 
an  Osborne  1  computer),  an  ARRL  fonjm,  a 
ladies'  lunqheofi,  Sunday  morning  break- 
fasts, and  ham  and  computer  sessions 
evary  hour.  Ifm  final  event  on  Sur^day  at 
lifiO  pm  wtll  be  a  T-hunt  on  1 46.70  MHz. 
T«lti-in  on  .D4rB4.  .TSflS,  arKJ  222.94/224.54. 
Fof  registration  forms,  write  Kamcomp  82. 
PO  Box  8)^7.  San  Diego  CA  921 3& 

iOVEUlNO  CO 

The  Northern  Colorado  Amateur  Radio 
Club  w^ij  hold  its  annual  Superfest  on 
June  5,  1982,  from  0:00  am  to  4:30  pm  in 
tne  McMUlen  Bultdtng  at  the  Larimer 
County  FairgroLinds,  Love  land  CO.  Admia- 
Bion  Js  S3.0D  and  will  Include  a  swap  table. 
There  will  be  exhibits,  technical  laiks,  a 
code  contest  with  prizes,  an  auction,  a 
swap  feat,  and  drawings  for  many  prizes, 
Including  a  synthesized  2 -meter  hand- 
held  Special  activities  are  planned  for 
non  hams,  especially  the  kida.  For  further 
Inlormalion,  contact  Gene  Bellamy 
WD9DRM.  3124  West  6th  Street.  Greeley 
GO  8063  L 

51  PAUL  MN 
JUNS 

The  Hottn  Area  Repeater  Association 
will  hold  a  swapfest  and  exposition  for  ra- 
dio  amaieurs  and  computer  hobbyists  on 
June  5^  19Q2,  at  the  Mrnnesota  State  Fair- 
grounds, St.  Paul  MN.  Admission  is  13.00 
and  free  overnight  parking  tor  selfcon- 


tainod  campers  will  be  available  &n  June 
4lh,  There  wlK  be  es^hlbits.  booths.  «m> 
prizes.  Talk-tn  on  .25^  85  and  MiJB-  For 
more  information  or  reservations,  write 
Amateur  Fair,  PO  Box  30054,  St.  Paul  MN 
55175. 

GRAND  RAPIDS  Ml 
JUN  6 

The  Independent  Repeater  Association 
wiM  hq^d  Its  annual  Grand  Rapids  Festival 
Swap  1  Shop  on  Saturday.  Jurre  5,  1962, 
frorT>  0:00  am  to  3:00  pm  at  the  Kentwood 
Fieid  HOUM,  |U5t  south  of  60th  Strwi  Qr% 
Kalamazoo  Avenue  Admts^on  i%  f3.0C^ 
eight- Joot  iat}ie9  a^re  $7.00  or  (4  OQ  for  half- 
size.  TlMf^  will  l>e  prizes  and  rflfreshments. 
Fof  more  mfofmatlon  at  Oeaier  reserva- 
lions,  wnte  IRA  Swap,  5G2  92nd  Street  SE, 
Byton  Center  Ml  49315,  or  call 
(616H55^2926. 

GUELPHONTCAN 
JUNS 

The  Guelph  Amateur  Radio  Club 
(VE3ZM)  wlil  hold  the  7th  annual  Central 
Ontario  Amateur  Radio  Flea  Market  on 
Saturday,  June  5,  1982,  from  8:00  em  to 
4:00  pm  at  'Regal  Hall, '  340  Woodlawn 
Road  Wastn  corner  of  Woodlawn  and  l-lan^ 
Ion  Parkway  (Hwy.  tf6],  Guelph  ONT  Ad- 
misflion  Is  12.00  and  chitdren  12  yearj  old 
and  under  wtti  be  admitted  free.  Vendors^' 
admission  is  an  adt^itH^nal  S300  and  a 
Quantity  of  3'  x  0'  tables  are  available  at 
S5  00  each.  Vendors  will  he  admitted  from 
0:00  am  on.  There  will  t^e  commercia!  dis- 
plays, surplus  dealers,  computer  software 
andhard<ware.  and  indoor  and  outdoor  01  a^ 
plays.  The  refreshment  concession  will 
open  at  12:00  noon.  For  further  mforma- 
lion,  coritacl  Bob  Lacombe  VEB1YE  at 
(519J-843  4618  or  Rocco  Furfaro  VE3HG2 
at  (5191624-1167. 

FAIRBANKS  AK 
JUN  5 

The  Arctic  Radio  Club  of  Fairbanks  AK 
will  hold  a  hamfeet  on  June  S.  19B2.  at  the 
Kiwanis  AG  Hall  at  the  Tanana  Vallqy  Fair- 
grounds. Tttft  doofs  will  open  at  0:00  am 
and  there  will  be  a  SS^OO  fee  for  all  sellers. 
Features  will  incCude  door  prizes,  a  rattle, 
a  left  footed  key  for  a  code  contest,  and 
an  oleMlashioned  pot  luck  dinner.  The 
Alaska  OSL  bureau  will  be  tfiere  as  well  as 
an  ARRt  representative.  Fof  further  infor- 
mation, contact  He*tJ  Walls  KL7JLF.  PO 
Boi  1625.  Fairbanks  AK  99707. 

CHELSEA  Ml 
JUN  6 

The  Chelsea  Swap  and  Shop  will  be 
held  on  Sunday,  June  6, 19B2,  at  the  Chel- 
sea Fairgrounds,  Chelsea  Ml.  Gates  will 
□pert  lor  sel  lers  ai  5:00  am  and  for  the  pub- 
lic from  8:00  am  until  2:00  pm,  Donation  Is 
S2.00  in  advance  or  S2.50  at  the  gate.  GNI- 
dren  under  t2  and  non-ham  spouses  will 
be  admitted  free.  Tafk-in  on  146.520  slm^ 
plex  an4  147.055  (Chelsea  repeater}.  For 
more  into,  write  to  Witltam  Altent>errHJt 
WB0HSN.  3ta2  Timberiine.  Jackson  Ml 
4^0t. 

MANASSAS  VA 
1UN6 

The  Ole  Virginia  Hams  Amateur  Radio 
Ciubi  Inc-^  will  hold  the  eighth  annuai  Ma- 
nassas Hamlest  on  Sunday,  June  0,  1902, 
at  the  Prince  William  County  Fairgrounds, 
Route  234,  Manassas  VA.  Admission  is 
$4.00  per  person;  children  under  12  will  be 


admitteiJ  free  Gates  will  open  at  0:00  am. 
In  addition  to  the  admission  fee,  there  will 
be  a  S3.00  fee  lor  Ultgatmg  and  the  flea 
market  spaces  Gates  wiii  open  at  7:00  am 
for  tal^gating  setup  Features  will  ir^clu^ 
ladies'  programs,  children's  enieriairv 
ment.  CW  proficiency  awards,  OSL  bur« 
otus.  food  ai>d  refreshments,  and  many 
prizes.  Taik^ln  on  146.37/140,97  {WlCHO» 
and  14652.  For  additional  Information, 
write  Jim  Lascans  WA2QEJ.  11063  Cam- 
field  OU  Manassas  VA  221  iO 

MILTON  PA 
JUN  6 

The  11fh  annual  Milton  Amateur  Radio 
Club  hamf est  will  be  held  on  June  6,  1982, 
from  6:00  am  to  5:00  pm,  rain  or  shine,  at 
the  Ailenwood  Fireman's  Fairgrounds  lo^ 
cated  on  US  T5, 4  mites  north  of  Interstate 
BO-  Advance  registration  is  S2.50;  at  the 
gate,  S3  00.  XYLs  and  chilttrefv  will  t>B  ad* 
milted  free,  Tfwre  wHl  be  a  flea  marftet,  an 
auction,  contests,  cas^  door  prizes.  an4t  ■ 
ffee  portables  and  mobile  FM  clinic.  An  In- 
door area  will  t>e  available  as  well  as  food 
and  beverages.  TalMn  on  .37^^97, 
.Q25/.625^  and  .52,  For  further  details,  con^ 
tact  Jerry  Williamson  WA3SXQ.  10  O^d 
Farm  Lane,  Milton  PA  17047,  or  call 
(7 17^7  42- 3027, 

ROME  NY 
JUNe 

The  Rome  Radio  Club,  Inc.,  will  hold  the 
30th  annual  flome  Ham  Family  Day  on  Sun- 
day, June  6. 1902,  at  Beck's  Grove.  Oswego 
Road,  Rome  NV.  Features  will  include  door 
pri^es^  an  early  brunch,  a  buffet-sly le  dirv 
rter,  a  Ilea  n^arttet,  educational  ar>d  acien^ 
tifk:  presefitations,  arx)  ovemigtit  parking 
for  oampets,  as  well  as  fty-4n  capaljilities^ 
Tatlt^ft  on  .2B/.eS  and  140^6. 

HUMiOLPTTN 

JUN0 

The  Hymt>o1dt  Amateur  Rad»o  Club  will 
hold  its  annual  hamfest  on  Sunday^  Jurie 
6i  1982,  at  a  new  location:  Bailey  Park. 
North  22nd  Avenue,  Humboidt  TN.  Tickets 
are  12.00  each,  with  no  additional  charge 
for  the  flea  market,  There  will  be  prizes, 
light  lunches,  end  ladles'  and  children's 
activities,  Talk  In  on  146.37/.97,  For  more 
Information,  contact  Ed  Holmes  W4IGW. 
501  North  18th  Avenue,  Humboldt  TN 
38343. 

D€AL  NJ 

JUN  6 

The  Fort  Monmouth  AftC  and  KaveHm 
will  hold  the  Jersey  Shore  Hamtest  and 
Electronics  Flea  Mairket  on  June  0,  1982. 
from  9:00  am  to  4r00  pm  at  ttre  Jewish 
Community  Center,  tOD  Grand  Avenue. 
Deal  NJ.  Admission  is  $3.00  per  person; 
XYLs  and  children  under  12  will  be  admit- 
ted free.  Outdoor  tailgating  is  S2.00  per 
space  and  indoor  space  is  $5.00  per  0'foot 
table.  Door  prizes  and  refreshments  will 
be  available.  Talk-In  on  147. 045 +  .6, 
146.775^.6,  and  146,52 

MAYVILLE  ND 
JUN  6 

The  Goose  River  Amateur  Radio  Club 
will  hold  Its  annual  hamfest  on  Sunday, 
June  6,  1982,  at  the  City  park,  Mayvllle  ND. 
In  case  of  inclement  weather^  the  tesUvl- 
ti^  will  tM  held  in  the  Mayville  Armory. 
Reglsuatiion  begins  at  noon  and  the 
charge  is  Si .00.  All  registrants  will  E>e  eli- 
gible for  the  many  door  prizes.  The  grand 
prize  (S  a  Heat hk it  SA2OS0  Super  Tuner. 
Camping  taciHties  will  t>e  available  for 
those  who  desire  lo  beat  the  rush.  Talk-in 
on  .31^91.  For  further  information,  please 
contact  Mary  Carlson,  RB  2.  Box  47,  nat- 
ion ND  58240. 


MIDLAND  III 
JUN  12 

The  Central  Michigan  Amateur  Repeat- 
er Association  witt  hold  Us  eighth  annuat 
hamfest  on  June  12.  1962,  from  8:00  am  to 
4:00  pm  in  ttie  "Great  Hall"  of  the  Valley 
Raza  Complex,  |USt  oft  US  Rt«.  10  In  Mid- 
land Ml.  Tickets  are  S3  00,  Children  under 
12  will  t>e  admitted  free.  Tatk^n  on 
146.67/.07and  14652  For  additional  infor- 
mation, contact  Carol  Hall  W 08 DOG, 4051 
Cardinal  Drive,  Ml.  Pleasant  Ml  4d650>  or 
call  (5171-772-0363. 

STATEN  ISLAND  NY 
JUN  12 

The  Staten  Island  Amateur  Radio 
Association  will  hold  its  flea  market  on 
June  12,  1982,  from  9:00  am  to  3:00  pm,  at 
All  Saints  Episcopal  Church.  Staten  Island 
NY.  To  get  to  the  church,  lake  interstate  278 
to  the  Victory  Boul«vafd  e^lL  proceed  east 
on  Victory  Boulevard  for  \^  mile  to  Oyatal 
Avenue^  arHJ  turn  left  on  Crystal  Avenue, 
There  will  be  no  admission  charge  lor 
buyers,  a  S3.00  per  space  charge  for  selleis 
(bring  your  own  tables),  and  a  $1.00  charge 
for  eiecttiCity.  Refreshments  will  be  avail- 
able. A  raffle  will  be  held  et  1:00  pm  and  ttve 
winner  will  have  a  choice  of  an  Jcom  IC4AT 
or  a  Bearcat  20^  Talk-in  on  146.52  and 
146.28/80.  For  additional  Information,  send 
an  SASE  to  George  Rice,  Jr.  WA2AWIJ,  430 
Jeweit  Avenue,  Stater  island  NY  10302. 

TORRINQTQNCT 
JUN  12 

The  CQ  Amateur  Radio  Club  of  Torring- 
tofl  CT  will  hold  a  ham  radio  flea  markei  on 
June  12,  1902,  from  9:00  am  to  5:00  pm  at 
Itw  Drop-In  Centet,  East  Albert  Street,  Tor- 
rington  CT,  TTke  admission  tee  of  $2.00  in* 
cliMles  a  chance  for  a  c^oor  pfi^e.  A  seller's 
indoor  table  is  S5.00  e»ch  and  tailgating 
space  IS  S2-00  each  Th«re  wlit  be  a  raffle 
featurirvg  a  personal  mtcrocomputer  kit  as 
lirst  pnze.  a  portable  radio  cassette  record- 
er as  second  prize,  and  an  MFJ  clock  as 
third  prize.  Vou  need  not  be  present  to  win. 
Talkfn  on  140  25^.85, 147  84^,24,  and  146.52. 
For  tickets,  table  reservations  {before  June 
0,  1962),  or  more  Information,  contact  Sb- 
bastlano  Aibanl  KAIFVM,  76  Pythian  Ave- 
nue, Torrlngton  CT,  or  call  (203)-489-2945; 
Ron  Brook  KAlAFN,  213  East  Pearl  Street, 
Torrlngton  CT,  or  call  (2a3H82'2764;  or  the 
CO  Club,  PO  0OJI 602,  Toffington  CT  06790. 

GRANITE  Cmr  IL 
JUN  13 

The  53fd  y^r  annivofaaiv  cerebration 
and  annual  hamfest  of  the  Egyptian  Radio 
Pub.  Inc.  (WSAIUI,  wtll  be  held  on  Sunday, 
June  13,  19B2.  a!  their  club  grounds  near 
Granite  City  lt_ 

QUEENS  NY 

JUN  13 

The  Hall  of  Science  Amateur  Radio  Club 
will  hold  Its  annual  Indoor/outdoor,  raln-or- 
ahine  hamfest  on  Sunday,  June  13,  1962, 
from  9:00  am  to  4:00  pm,  at  the  municipal 
parking  lot,  80-25  t26th  Street  (t  blook  from 
Queens  Boulevard)<.  Kew  Gardens.  Queens 
NY,  Seilem'  donations  are  S3.00,  buyers' 
donations  are  S2.00.  and  XYLs  and  children 
will  be  admitted  free.  Talk-in  on  145.520,  For 
additional  information,  coniact  Thomas 
Doyle  KA2DTB,  135-14  l2Sth  Street,  South 
Ozorie  Park,  Queens  NY  1U20,  or  phone 
(21Z)-73&0887. 

WILLOW  SPI^INQSIL 
JUN  13 

TfwSix  Meter  Ctubof  Chicago,  Inc.,  will 
hold  its  25th  annual  ARRL-affilialed  ham- 
feet  on  Sunday,  June  13, 1982,  at  Santa  Fe 
Park,  91st  and  Wolf  Road,  WMJow  Springs 
IL  (southwest  of  downtown  Chicago).  Ad- 


60     73  Magazine  •  June,  1982 


SUMMER  VACATION  SPECIALS 

You  Can  Bank  on  Us  for  More  Than  Just  Low  Prices. 


If  YAEBU 


SAVE  518600 
on  FT902  DM 


i« 


_     4*^' 


HF  TRANSCEIVERS 

RONE  9  Band  Hcvr  W/FP107,  */0  FM  *ZB95.0Q 

Ff-107M/OMS  9  Sand  ncvf,  digHal  Si 034.00 

FT  101 2D  MKIII  9  Band  xcvr,  digital  I7&9-00 

FV-101DM  Synih  .  scanning  VFO  S323.00 

FT-i02DM  9  Band  xcvr   digital  S1 349.00 

VO  90tP  Monitor  scope  w' pan  adapter  146t.O0 

fV-MlOW  Remole  VFO  wwemqr^  *373.O0 

WTTOf  a  Band   Mobtie  scvr  i72».00 

FP  707  Power  SufhpJv  1145,00 

FTV*707  Trarysverler  Wro  Mpdyle  1116  00 

2M  Module  only  S13S.O0 

@M  Module  only  l9fi.O0 

TIJCM  Module  orify  S220.OO 

VHFUHF  TRANSCEIVERS 

rresOR  eM  SSe^FMCW^AM  xcvr  S4e6.00 

Ft  480R  2W  SS&FM^CW  icvr  S476  00 

FT7dOF1  70CM  AlF  Modfi  «cvr  S6&9  OO 

VHFUHF  HAND  HELDS 


FT-20fiR  2.5W  2M  FM  HT  wrTTF 5323.00 

FT-70SR  1W  440  FM  HT  v^fTTP S323.00 


VHF  PORTABLES 

FT.690R  6M  FM'SSe  kcv*  S339.00 

R  aSOR  2M  FMrSSe  KCvr  S3S9  00 

FULL  UN£  AVAILABLE  ON  SALE 

AH  sccessoftes  iQ^t  oft  ^r*  Radto  fufcnsse 


The 

Antenna  (703)  569-1200 

R^nk     ^^60^  General  Green  Way 
■^^'"'^     Alexandria,  VA  22312 


HUSTLER 

4BTV40  10  Mtf.  Vertical      ,  . .. .  ,    *79.00 

&BTV  BO  10  Mtr.  VerHcaJ  $100.00 

M01/M02  HF  Mobile  Mast  .>. . vSia.OO 

HF  Mobile  Resonators,  Std.  400W .SUPEI^  2KW 

lOdrlSm.  $9.00  SX^JOQ 

2ChTi  tii-oo  tfaoo 

40in  fl3.00  $1«.00 

75  w  Mm SUJOa  52^00 

BW  1  Bumpcf  mt  wilh  S  S  Strap .Si 3,00 

SSMa  Ckxnfnefcial  SB  Ball S14.0O 

SF-2  5/8  Wave,  2  Meter  Antenrta $9.00 

HOT  HustloffMt.wpth  Swivel  ball $14.00 

GMt^B  2M  Golinear,  Mxed  Slalion,  6db $71.00 

G7444  2M  Cottnear,  fixed  SlatJ^n.  7<Sh $103.00 

ROHN 

200  10  ft   Stacking  Secilon  ,  $32,00 

2SQ  10  ft   Stacking  Secilon  S39.S0 

4SO  10  fl    Stacking  Saciion  $^7.50 

25AG  2.3  or  4  Top  Section  $52  50 

MDBX  4a  4e  ft    Free  Sianding  Tower $320,00 

HiX&e  56  ft   Free  Standing  Tower  .   $340,00 

FK2S46  43  ft,  2SG  Foldover  Tower     ._.   $725  00* 

Tfl3  Thrysi  Bearing .  f4a.O0 

SBZSG  snort  Base  for  25G  Sir 50 

BPH25G  Hinged  Base  Plate     .,^. $59  75 

AStBQ  Accessory  Sn«lJ i«.50 

HB25AG  T4    House  Braciief  $14.50 

BPC2SG  Cement  Base  Ffate    $32  00 

8AS25G  Short  t<^  siM:nofi  Wf/acc   shelf..     $36.00 

M200  16  gauge    10  ft  2^  •.D,  Mast $19.50 

M200H  IB    waft.  10  ft   2'  0  0   Mas«    ...     $36  00 

fretgM  prepaid  on  F^t^owm  towers.  Prices 
W%  higher  ^est  at  ftpcky  Mts 

Phllly  Stran  Guy  Cabli  In  ctock  -  for  price  and 
dsllvery  call  (703^  569-1200 


gUlCOM 


-r 


■^ 


HF  TRANSCEIVERS 

IC-720A  DigltaJ  HF  xcvf,  General  Coverage  Hcvf. 

Aii  9  HF  Bands,  2VFOs Sl19fl.O0 

IC'730  Solid  Stalen  Digitai  %cvr^  8  Bands  2  VFOs, 

1  Wemorv  per  band  .  .  $729,00 

PS-1 5  Power  Supply    $135,00 

PS^20  Power  Supply  . .  $199.00 

Phone  Patcit  Specify  730  or  720 A S1 75  QQ 

AT- too  tOOW  auto  antenna  tunef .  $314.00 

AT-500  500W  aut<}  antenna  tuner  S3t9.00 

VHF  UHF  TRANSCEIVERS 


IC-290A  All  Mode  2M  xovr,  2  VFQ^  5  A^emonea, 


UtD  Walt^.  scan  SP ECl AL .    ... 

IC  2SA  Compact,  2'l^  xcvr,  2  VFQs, 

Scan.  lr2SW 
tC'ZSI  A  2  M  A 1 1  Mo<J  e  SUPER  SP  ECJ  AL 
10-451 A  UHF  All  Mode  Base  Station. 
fC-55i  eM  All  Mode  Base  Station  , 
rC-4S0A  Aff-Mode  430  MHz  Mobile 

HAND-HELD  w/o  tjp 


$459  00 
MernOftes 
$314.00 
S599j00 
$799,00 
$429  00 
$57^.00 

wffTP 


IC  2A;2AT  2M,  Haf>d  heid $216,00 

iC  3A/3AT  320.  Hand  he(d, $242  00 

IC  4A/4AT  440,  Hand  heid  $242  OO 

FliLL  LINE  AVAILABLE  ON  SALE 
Afi  accessories  T0%  aft  */  Badto  Purchase 


$242.00 
$269.00 
$269.00 


THIS  MONTH'S  SPECIAL 
LimiiBd  to  EEB  stock. 


VAESU  404A 
YA€SU  404  B  ^^TTP" 


Speclat  $179,00 

.     .    reg  $369,00 

$199.00 

ren    $399,00 


^ORDERS  ONLY 

800-336-8473 

*Shippin.g  charges  not  included 

•  Prices  subject  to  change  without  notice 
•Some  items  iimited  lo  atocK  only 

•  Limited  quantMies 
•No  COD  s 


HY-GA]N 

TH3JRS  Jr   Thur^dertJifd.  750W  P£P  $150.00 

HQ-ZS  Hy  Quad,  2  Element  $235.00 

TH5DXS  Tfiundefbtrd.  &  Element  $215.00 

TH  3MK3S  Ttiuncteftoifd,  3  Element  $195.00 

TH2MK3S  Ttiundemifd,  2  Element  $126.00 

TH7DX  Tnundefbird.  7  Element. S33eJX) 

392S  TH60XX  Conv^Tiion  KH  lO  TH70X  $15500 

105BAS  5  Element  lOm  '  Long-Jotin"  $t  14.00 

155BAS  5  Element  tSm  "Longgohn  $i6i  00 

SfiSBAS  6  Element  aOm  "Lorvg-John"  $269,00 

I4AVQ/WBS  tO^Om  Vertical .  $49,95 

18AVTWBS  tO^Om  Vertical , . ,  $^7,50 

V'2S  Cofinea/  Gain  VerlicaJ  138-174  MH^  $33,75 

BNfl«  Ferrite  9alun,  tcm)  meters $t3,00 

HDR300  Deluxe  Rotor,  DtgFlal  Readout  $378,00 

.      SUPER  HY-GAfN  PACKAGE    ^ 

^^     SAVE  $355.15  Pigs  FREE  DELIVERV*      ^ 

SALE  $136 JO 

HG53SS  52  ft    Self -Supporting  Crankup 

Tower . ,  , $900.00  Value 

HG^OA  3  each  Coax  ann  for  Tower  Legs 

..-,......._....    $39,00  V*ia# 

THSDXS  Thunderbird,  5  Eteffiefit  Triband 

$319.95  Value 

HAM  IV  Rotor  .....  $237,95  Vilue 

HG  10  10  ti-  mast  2    O-D   120  WaN 

Steel .«  $56,00  Value 

BN^  FeiTtte  Bahin  ...  S1t.95  Value 

free  deitvery  offered  for  sftipfit^g  pomts  wtthm 

48  Srafes     ADDEO  BONUS  iftdude  M  O  or 

Cemfi^  Ck    with  order  snd  receive  a 

Van  Gordon  PD-&040  Dipole  FREE. 

NO  SUBSTiTUTiONS  PLEASE.  SALE  ENDS  4(301^ 


SAVE  $70.00 
on  FRG  7700 


SWL  DX  HEADQUARTERS 

Yaeau  FRa7700  150  KH^ao  MHz  Digttai  rcvr  $479.00 


Yi«su  WU7700  12  Ch    IVIemory  Unil 
Vaesu  FRG7     b-2%2  MHz  rcvr 
Kenwood  fl  1O00    15  30  WH? 
Kenwood  R  600    15  3C  MHz 
Panasonic  RF  3100    t  30  MH,j  &  FM 
Panasor*ic  RF  2200  MB  SW  FM 
Sony  ICF  ?00i  Digital   Compaci 
Sony  ICF-6SO0  tNewi  Oigitai 
Paiomsr  Loop  Amp  J  Ant.  . 
Into  Tech  M200F  ar-vcw  Vtdeo  Out 
McKay  Dymeli  DA-100D  Active  4nt 
Kantronie  Mini  RsA<lflr 
World  R»dio  TV  HarnSbooN  1962 


,,$135  00 
$28900 
$44900 
$359,00 
5269.00 
$159.00 
$299  DO 
1199  00 
I7r50:S59  95 
$54900 
$129  00 
$249.00 
St  5.50 


Cti/  OP  Mrfife  Today  tot  ati  fOur 
Test  Equipment  Needs. 

TEST  EQUIPMENT  SPBCtAUSTS 
FOR  OVER  W  YEARS. 

Scopea,  Countflfs,  DMM,  Generaior«, 

Powm  Supply 


HITACHJ  SCOPES 
NA   SOAP! 
LEADER 
FLUKE 
BECKMAK 


BiRO  ELECTRONIC 
a&K  DVMASCAN 
AMPHENOL 
ASTRON 


Electronic 

Equipment 
Bank 

Jtrst  TO  mites  wssi  of  W^sfi^  D.C. 


516  Mill  Street,  N.E. 
Vienna.  Virginia  22180 

(703)  938-3350 

Ptoi  a  visil  next  lime  you  re  in  Washing  ion,  DC 


CUSHCRAFT 


A3  3  Element  Triband  Beam 

A4  4  Element  Triband  Beam 

A743  7  *   10  MHZ  Add  On  tor  A3 

A744  7  ft   10  MHz  A^  On  iOf  A4 

AV3  3  Bar^d  Vertical  lO-20m 

AV4  4  Band  Vertical  ttMOm. 

AVS  5  Band  Vertical  H>«)m 

R3  14.21.26  MH^  Ringo 

32-19  Boomer  19  Element  2m 

21 4B  Jr.  Boomer  14  Element  2m 

A147-11  2m  11  Elemeni  Antenna 

Al47'4  2M  4  Element  Antenna    ., 

ARX  2B  134  t&4  MHz  Rmgo  Banger  n 

At44  tOT  145  MHz  ID  Element 

A432  20T  432  MH^  20  Element 

A14TMB  Twist  Mounting  Boom  &  Bracket,  $21,00 

Fuit  lintt  Avay/abfe  oji  S^ie  CbH 


■\* 


$167.00 
$204.00 
$55.00 
S55  0O 
$41.00 
$82.00 
$8d.00 
$204.00 
$75.00 
$61.00 
$34.00 
$2^.00 
$34.00 
$41,00 
$41 ,00 


Ml  NhPRO DUCTS 

HQ'I  hfl in hOuad  6/1 0^f15/2OfI1  Antenna  $12995 

6-24  2  Elemeni  HP  Mjm-Beam  &iOJl5^20m  $9900 
flK-3  3rd  E3em«n}  Add-on  for  B-24, 

Improves  t0^20m . .  $67,00 

C-4  Mint- Vertical  6't0^l5.'2Qm  $59,00 


ROTORS  &  CABLES 

CDE  HAM  IV  Rotor 
CDE  T2X  Rotor 
CD€  45     RolQT 
Alli«nc«  HC^73  Botor 

Allianca  UlOO  Botor 

flG*U   Foam  Coas  95%  Shield 

RG-213  Coax,  Mil   Spec 

Mlrtl-8  Coax  95%  Shiefd 

Rotor  Wire  8  Conductor  — 
4  Conductor- . . 


-     V     h     h 


$175.00 
$244.00 
$92.00 
$92.00 
$42.00 
24C/1t. 

2a^ti. 

1 2«/f  t . 
.  I8f/lt. 

.  j.Hnt. 


1 


73Magazine  •  June.  1982    89 


vance  regis  I  rat  ion  Js  £2.00:  at  the  gale. 
S3 .00.  Thera  will  Iw  a  large  swapper's  row. 
displays,  an  AFMARS  meeting,  rgfr ash- 
men is,  plenty  of  parking  space,  picnic 
g,roiin{|s,  af>d!  prices,  inf:lui3tng  afw^t  ptii^ 
Dt  a  color  TV.  Talk-in  on  146.52  or  .37/97 
K90NA/R.  For  advance  tickets,  contact 
V£il  HelJwig  K9ZWV,  3420  South  6Dlh 
Court,  Qce^o  a  60650. 

SAHIA  MARIA  CA 
JUN  13 

The  Satelllle  Amateur  Radio  C4ub  will 
hold  its  annual  bar-b-q/swapfesl  on  June 
13,  I9sa2.  at  the  Union  Oil  picnic  grounds, 
|u$t  south  of  Santa  Maria  CA.  Adrnia$ion 
ts  Iree  for  the  swapfest;  dinner  tickets  aie 
S7.S0  for  adults  and  $3  50  for  children  6  to 
12  years  of  ag^;  pfize  tickets  are  $i  00 
each.  Swap  tables  are$2  50fof  each  area, 
Tfiere  will  be  prt£e«,  contests,  anej  a 
Santa-Maria-style  baf-b-q.  Talk-m  on 
146. 34/. 04.  For  lockets  or  more  informa> 
tion,  write  Santa  Maria  Swapfesl,  PO  Boat 
2616,  OrcuttCA  93455. 

BELLEFOUNTAINE  OH 
JUN  13 

The  Champaign  Logan  Amateur  Radio 
Club,  Inc^  anrtual  ham f est  and  flea  mar- 
ket will  be  held  on  Sunday,  June  13.  IS&Z, 
a)  the  Logan  County  Fairgirounds,  BeUe- 
fountaine  OH.  Tickets  are  $1.50  m  ad^ 
vance  and  $2.00  at  the  door.  Tables  are 
S3  00  in  advance.  Gates  will  open  at  7:00 
am  and  priie  drawingis  will  be  held  every 
hour  starling  at  9:00  am.  The  major  prizes 
of  $200,  $100,  and  $50  will  be  drawn  at  3:00 
pm.  you  need  not  ba  present  to  win.  Talk- 
in  on  147,60/00  W&EBG/R.  For  more  Infor 
mation,  tickels,  or  tables,  contact  M.  A. 
(Bud)  Criswold  W6J>CM.  PO  Box  301 ,  Urba^ 
na  OH  43078 

HUNTINGTON  WV 
JUN  13 

The  Tri-State  Amaleiir  Radio  Assoc  ia- 
lion  will  hoNl  its  201  h  annual  Huntington 
Ham f est  on  Sunday,  June  13,  1962*  Irom 
9;IX)  am  to  3:00  pm  at  Camden  Park,  off 
Route  60  West,  Huntington  WV.  Reg  1st ra^ 
tlon  Is  $3.00  per  person  and  children  under 
12  will  be  admllted  tree^  Spacer  are  S3.O0 
each  fof  the  fiea  market  and  6- foot  com- 
mercial dealers'  tables  are  £5.00  each. 
Setup  time  is  6:00  am  to  0:00  am.  Over- 
night space  will  be  available  for  setf-con- 
tained  RVs,  Talk-In  on  146.04/.&4  and 
146  52/.S2.  For  further  mforfnatton.  aend 
art  SASE  toTARA,  Inc..  PO  Bos  4100,  Hun^ 
tingtofi  WV  25729 

SAGINAW  Mi 
JUfi  13 

The  Saginaw  VaNey  Amateur  Radio  As- 
socialjon  v^li!  hold  its  new  Electronic  Hob- 
by Expo  on  Sunday,  June  13,  1082,  at 
Bridgeport  High  School  off  175,  exit  144 
wesL  Doors  will  Open  at  B:O0  am.  Adults' 
tickets  are  $1.00;  kids  will  be  admit  led  free. 
Trunk  sa^es  are  $2.00  and  all  tables  are 
S5.0O  Features  will  include  displays  and 
demonsiraiions  tor  the  who^  family.^  majof 
pfjizes  totaling  S400.0D«  w4  hourly  ilraw^ 
Ings.  Talk-ih  on  147.24  and  146.52  |K8DAQ. 
For  more  intormatiorF,  tab-ie  neservations.  or 
tickets,  send  an  5ASE  to  SVARATEHE^,  50 
Durarkd  Court.  Saginaw  Ml  4^602, 

MOMROE  Ml 
JUN  13 

The  annual  Monroe  County  fladio  Com- 
municaticns  Hamfe$|  witl  be  held  on  June 
13,  1362,  from  8:00  am  to  3:00  pm  at  the 
Monroe  Community  College.  Raismvilie 
Road.  Monroe  Ml  Tickets  are  S2,00  at  I  he 
gate,  $1.50  in  advance,  and  XYLs  and  Chit- 
fireri  will  be  admitted  bee.  Renty  of  table 
space  and:  fr^  parliiing  will  be  avaiiabie. 
Feature<i  wHI  be  contests,  auctions,  and 


tJi splays  Talk-in  on  146 J 3/73  and  52.  For 
aOditional  in  format  ion,  contact  Fred  Lux 
WOeiTZ.  PO  Bolt  ^62.  Monroe  Ml  46161,  or 
(^lC3l3}-243-l€iea 

AKRON  OH 

JUN  n 

The  15th  annual  Ooodyear  ARC  Hamfest 
wit!  be  held  oo  Sunday.  June  13, 1962,  from: 
10:00  am  1o  6:00  pm  at  Goodyear  Wingfoot 
Lake  Park,  near  SR224 and  43,  east  o1  Akron 
OH.  Family  admission  is  $2.50  in  advance 
and  $3.00  at  the  gate.  Flea  market  spaces 
outside  are  $  t  .00  and  dealer s^  tablee  inside 
ttve  shelter  are $500 ^advance reservaiions 
are  sugo«s(ed).  Ttiefe  wilt  be  picn»c  tables^ 
a  concession  sian>d,  a^id  tree  parking  avail- 
able Prize  drawings  will  be  held  thf  oughoul 
the  day  with  grand  pnzs  drawings  at  4:00 
pm.  Talk-in  orv  146,04/.64.  For  furthaf  infor- 
mal ion,  advance  sales  lickets,  and  sheUef 
house  reservations,  send  an  SASE  to  Don 
Rogers  WA8SXJ,  161  S.  Hawkins  Avenue, 
Akron  OH  44313, 

PHILADELPHIA  PA 
JUN  14 

The  Phy-Mont  Mobile  Radio  Club  wilt 
host  the  amaletir  radio  segment  of  the  In- 
ternatiortal  Conference  on  Communica- 
tions on  Monday.  June  14, 1962.  from  7iX) 
pm  lo  lOiX)  pm,  at  the  Franklin  Pfa^a  Ko- 
teL  I7lh  and  Race  Streets.  Philadelphia 
PA.  The  session  is  free  and  all  radio  ama- 
teurs are  tnvtted  to  attend,  Fof  additional 
Informal  ion,  contact  Jacob  S.  Kovalchek, 
Jr  AK2t,  1228  Heartwood  Drive.  Cherry 
Hill  NJ  08003,  Of  phone  (603^28-5924. 

DUNEUEN  NJ 
JUN  10 

The  Raritan  Valley  Radio  Club  will  hold 
its  11th  annual  tiamtest  and  Ilea  market  on 
June  19,  1982.  I^om  8:30  am  to  4;00  pm  at 
Cotumbia  ParK.  Dunetlen  NJ  TTsefe  will  be 
doo^  prizes  ar»d  a  snack  bar.  Admission  is 
SaOO  lor  seliers  and  $2.00  for  lookers  TaJk- 
in  on  148625/025  tWaOW)  and  146  52  di^ 
rect-  For  further  intormatton,  call  Bob 
KS2EF  at  f20l^369-703a 

PAVETTE  ID 
JUN  19-20 

The  Voice  of  Idaho  Amateur  Rad^o  Club 
and  the  Treasure  Valley  Radio  Associa- 
tion will  hold  tne  fifth  annual  Treasure  Val- 
ley Hamfest  on  June  19-20. 1982,  from  9:00 
am  Saturday  to  3:00  pm  Sunday  at  the 
Mini-dome,  Payette  tO.  Registration  in- 
cludes break! a SL  dinner^  and  prize  tick- 
ets, and  is  $15.00  in  advance  and  $20.00  at 
the  door.  Features  will  include  swap  ta- 
bles, dealers,  transmitter  hunts,  special 
activities  tor  ladies  and  children,  games, 
contests,  prices,  a  cocktail  party  on  Sun- 
day, a  picnic  and  banquet  on  Saturday, 
and  a  breakfasi  on  Sunday.  Talk-in  on 
147.84f.24  (WB7NSE/RJ,  147,72/. 12 
(K70JI/R),  and  ^46  5Z  For  more  informa* 
tion,  contact  Samuel  K.  Sower  N7D0V, 
1909  Grant  Street.  Caldwell  ID  S3606,  or 
phone  (20a)-4&*^i:K- 

MOORHEADMN 
JUN  19-20 

The  ACE  Radio  Club  will  hold  its  first 
radio  and  computer  ftea  market  on  Jurve 
19^20.  1982,  beginning  at  8:00  am  at  the 
Moorhead  Cenienntai  Arena,  Moorhead 
MN  Talk- in  on  146.970.  For  complete  de- 
tailed Information,  send  an  SASE  to  AGE. 
PO  Box  452,  Moorhead  MN  56560. 

LANCASTER  OH 

JUN  20 

The  Lancaster  and  Fairfield  County  Anv 
aieur  Radio  Club  will  hold  its  annual  Lan- 
i^tster  Hamfesi  on  June  20,  1962:  from 
9:00  am  to  5.O0  pm  at  the  Fairlield  County 


fairgrounds,  Lancaster  OH.  Ttckets  aie 
S2.0O  in  advance  or  $3, 00  al  the  door.  Flea- 
miftrfcel  tables  will  be  available  or  bring 
your  own.  There  will  be  hourty  drawings, 
refreshments,  and  plenty  of  tree  paftting. 
Talk-in  on  147.03/63  Of  146,52,  For  addi- 
tional Informal  ion  or  advarvce  tickets, 
write  Box  X  Lancaster  OH  43l3£f, 

CROWN  POINT  IN 
JUN  20 

The  Lake  County  Amateur  Radio  Ciub 
will  hold  its  1 0th  annual  Dad's  Day  Ham- 
fest ort  June  20, 13S2.  at  the  Industf^ai  Arts 
Building  at  the  Lake  County  Fairgrounds, 
Crown  Point  IN.  Prizes  will  be  featured 
and  ati  evenis  will  be  held  indoors.  Tickets 
are $2.50.  TaSk-in  on  147.84/24  or  .5Z  For 
advance  tJckets,  mail  check  to  LakeCourv 
ly  ARC,  c/o  Walley  Kojol  KA9FDC,  624  U. 
Rensselaer  Streel,  Gnrtith  IN  463191 

MILWAUKEE  W1 

JUL  8  11 

The  VL  International  SJngie  Sideband- 
er  s  (YLISSBi  1982  Coni/ention  will  be  held 
on  July  8-11, 1962.  an  Milwaukee  Wl.  Activi- 
ties will  Include  the  DX  Roundup,  the  Sys^ 
terns  Awards  Banquet  on  Saturday  nighty 
and  a  major  door  prize  of  an  Icom  IC-2AT. 
Jean  Chittenden  WA2BGE  will  tell  atxjut 
her  recent  Chma  trip.  Pre-convenlion  ac- 
tivities wm  beqin  July  5.  1982.  with  goM- 
Ing,  hshtng,  and  side  trips  planned.  De- 
tailed information  may  t>e  obtained  by 
sending  an  BASE  (business  size)  to  Sus 
Musachi  Ka9DC.  PO  Box  18123,  Milwau- 
kee Wl  53216. 

STATE  COLLEGE  PA 
JULIO 

The  NIttany  Amateur  Radio  Ctub  Ham 
Festival  will  tie  held  on  July  10,  1962,  from 
8:00  am  lo  4:00  pm,  at  the  HRfi-Singer  pic- 
nic grounds,  Scinance  Park  Road  {between 
US  322  West  artd  Rte  26  East),  State  Qo^ 
lege  PA,  Talk-in  on  146.16/76,  146.25^.85, 
and  146,52,  Features  will  include  a  flea 
market,  technical  sessior^s,  numerous 
prtzes  and  contests,  and  refreshments. 
Tickets  are  $3,00i  iBilgatlng  and  tables  are 
S5,00.  for  more  inforrriaiion,  contact 
Richard  L  Sine  K&3WN  l6O0  E.  Branch 
Road,  State  College  PA  16601. 

OAK  CREEK  Wl 
JULY  10 

Th«  South  Milwaukee  Amateur  Radio 
Club  will  hold  ris  annual  swapfest  on  SaCur- 
day.  July  10, 1962,  Irom  7.-00  am  to  5:Q0  pm 
at  the  Amencan  Legion  Post  434,  9327 
South  Shepard  Avenue.  Oak  Creek  Wl.  Ad- 
mission is  $2.00  and  includes  a  hai^py  hour 
with  free  beverages.  Prizes  include  a  SiOO 
first  prize  and  a  $50  second  prize  plus  a 
variety  of  other  prizes  to  be  awarded  during 
the  day.  Parking,  a  picnic  area,  hot  and  cold 
wndwiches.  liquid  refreshments,  and  over- 
night campirhg  will  be  available  Talk4n  on 
f46.M  More  details,  including  a  map.  may 
be  obtained  from  the  South  Milwaukee  Am- 
ateur Radio  Club,  PO  Box  iCffi,  South 
Milwaukee  Wl  53172. 

m^TON  ONT  CAN 
JULIO 

The  Burlinglon  Amateur  Ftadio  Club  will 
hold  the  8th  annual  Ontario  Hamfest  on 
Saturday,  July  10, 1982,  at  Iha  Milton  Fair- 
grounds. Milton,  Ontarto  Admission  Is 
$3-00  per  person  or  $2^00  for  pre-registra- 
tion,  There  wili  be  a  flea  market,  displays, 
an  auction,  contests,  and  prizes.  Camping 
will  be  available  and  grounds  will  open 
Friday  njlght  for  early  campers.  For  pre^ 
registration,  contact  Mike  Cobb 
VE3MWR,  PO  Box  836.  Buriington  L7R 
3V7,  Canada. 


eOlSSEVAIN  MAN  CAN 
JUL  10*11 

The  19th  annual  international  Hamresi 
will  be  held  on  July  10-11, 1962.  on  the  Ca- 
nadian side  of  the  International  Peace 
Gardens  between  Dunseith  ND  and  Bote* 
sevain  MAN  in  the  Canadian  Pavilion.  Ac- 
tivities will  include  transmitter  humsn  mo- 
bile judging,  CW  sod  QLF  contests,  semi- 
nars for  OMs  and  YLs.  fiea  markets,  a  ham 
auction,  a  Saturday  night  dance,  a  Sunday 
morning  breakfast,  and  lots  of  great 
prizes.  For  more  information,  contact  Ber- 
nle  Arcand  WD9MD.  PC  Bok  &3.  Epping 
ND  58843,  or  William  M  Shryock,  Jr. 
WD9GRC,  322  East  4ih  Street,  WlUi^ton 
NO  56801. 

RAPID  CITY  SD 
JUL  mil 

Ttie  Black  Hills  Af%C  will  hold  the  annu- 
al South  Dakota  Hamfest  on  July  10-11, 
1932,  at  the  Surbeck  Center.  SD  School  of 
Mines  and  Technology,  Rapid  City  SD, 
Pre-registratiDn  is  $7.00:  registration  at 
the  door  is  $6.00.  There  will  be  a  prize 
drawing  for  pre- registrants,  forums,  con- 
tests, a  picnic,  and  prizes.  Tables  are  free 
for  the  flea  market.  Talk-in  on  .34^.94 
(WOBUQ.  Fflir  further  information,  write 
Black  Hills  ARC.  do  Rudy  WBAPWA.  A&22 
Capitol,  Rapid  City  SD  57701. 

MAPLE  RIDGE  BC  CAN 
JUL  10^11 

The  Maple  Ridge  ARC  will  hold  its  Ham- 
fest '82  on  July  10-11,  19B2,  al  the  Maple 
Hidge  Fairgrounds,  located  30  miles  east 
of  Vancouver,  Maple  Ridge  BC.  Reg  1st ra- 
uon  for  hams  is  $5.00;  lor  nor^  hams  over 
12  years  old,  $200.  There  will  be  food, 
prizes,  a  swap  &  shop,  displays,  a  bunny 
hunt,  ladies'  and  children's  programs,  and 
a  main  prize  drawing  fOf  a  Kenwood 
TR  2500.  Camper  spaces  will  be  available 
(some  with  electrical  hookups).  Talk-m  on 
146.20/80.  For  mo*e  intormatton  and  rag- 
istratmn.  contact  Maple  Ridge  ABC,  Box 
2^2.  Maple  Ridge  BC  V2X  7G2, 

INDIANAPOLIS  IN 
JULY  11 

The  Indiana  State  Amateur  Radio  CofV 
vent  ion,  in  coniunction  with  the  India  naph 
olis  Hamfest  and  Computer  Show,  will  be 
held  on  Sunday.  July  11,  1982,  at  the  Mari- 
on  County  Fairorournls  at  ttie  southeast- 
ern intefsection  of  1-74  and  1-465,  Gate 
tickets  are  $4.00  and  entitle  you  to  all  ac- 
trvilies,  including  the  ma|or  prize  drawing 
and  hourly  prizes.  There  will  t»  inside  and 
outside  flea  markets,  a  separate  compute 
er  show  and  flea  market,  a  commercial 
vendors'  display  area,  technical  forums, 
club  activities,  and  ladles'  programs. 
There  will  be  setups  after  12^00  noon  on 
Saturday,  July  iDlh.  Security  will  be  pro- 
vided Saturday  night  and  Sunday,  and 
camper  hookup  facilities  will  beavaiiabte 
on  the  grounds.  For  further  information, 
contact  Indianapolis  Hamfest,  Box  t1066» 
Indianapolis  IN  46201. 

ALEXANDER  NY 
JUL  11 

The  Genesee  Radio  Amateurs,  Inc.,  will 
hold  the  second  annual  ARRL-approved 
Batavia  Hamlest  on  Sunday,  July  1 1 , 1 962, 
Irom  7:00  am  to  5:00  pm  at  Alexander  Fire- 
men's Grounds,  Rte.  98  (nine  miles  south 
ot  Balavla^.  AliKander  NY.  Registration  is 
$200  in  advance.  $300  at  the  gate,  and 
$1.00  for  the  Ilea  market.  There  will  be 
many  prizes,  a  large  exhibit  area,  OM  and 
YL  programs,  contests,  plenty  of  tood* 
overnight  camping,  and  a  boat  anchor 
auction  at  3:00  pm  Talk-in  on  4.71/5.31 
{W2RCXJOI  .52.  for  advance  lickets.  make 


73  Magazine  •  June,  1982 


Ca££  AES  (i^Low  Prices  (ut  DRAKE  8,qmbmfd 


TR-7A  160m  Xcvr/SW  Rcvr/MB/500Hz  ...  S1699  0O 
PS-7  25A  continuous  daty  power  supply  — 299.00 

PS-75  ISA  power  supply,  25A  surge 199  00 

RV'7  Remote  VFO. ..;./. 195.00 

RVM-75  Remote  VFO .,. TBA 

MiyilE-7  Mobile  mounting  kit ., 79.00 


R-7A  0-30  MHz  dig,  Rcvr/NB/SOO  Hz  liter    S1649.00 

Acce5$one$: 

mi  Speaker.., S3S.O0 

FA'7  Cooling  fan  .  - . . . , 29.00 

AUX-7  Range  program  board . 4S.00 

RRM-7  Range  receive  module 8. 50 

RTM-7  Range  transcejve  module  .8.50 

WARC'7  WARCbandkil  (3RTM's) 24.95 

SL-300  300HzCWIiiier.. , 59.9S 

Sl-500  500  Hz  CW filter 59.95 

Sl-1000  1  Khz  RHY  lilter.  R-7A 59.95 

SI  ISOO  1  a  KHz  SSe/RTTY  tiller 59.95 

SL-4000  4  kHz  AM  filter 59.95 

SL'SOOO  6  KHz  AM  filter.... 5995 

1S48  R  7A/TR-7A  cable  interface  Jut ., 29.50 

7037  blender  card  service  kit  „.*,,-.. 50.00 

Service  manuals  ..„....,...*,,.-.-..--  ea  35.00 
1982  World  Radio/TV  Hjndboak  ...., 16.50 


1-7  2kw  PEP  linear  w/tubes, , .., -• 


It  *,r  r   '- 


$1400  00 


1^75  l,2Nw  PEP  linear  w/tube 


....  $854.95 


MN-75  200w,  160- 10m  antenna  tuner 


$259.00 


MN-2700  1  kw.  I6&'10fn  antenna  tuner ....  1349  00 
B-1000  4:1  balun  MM  75/MN-2700 29.95 


The  prices  shown  in  this  ad  are 
suggested  by  the  Manufacluren 

On  most  MAJOR  items  you  can 
Save  Money  with  a  Big  AES- 
Discount*  Don't  wait!  -  Call  us 
TOLL  FREE  and  get  your  price. 


CS-7  1533  Remple  antenna  swilcli  .. 

1534  Conirot  consul*  only  (or  CS-7 

1535  Remote  switch  only  for  CS-7 . 

AK-75  Multibsrid  antenna 


.   *   *   -a    *    fi 


169.00 

102  00 

67  00 

39  J5 
AA-75  Anienna  insulalqr  kit ...3,49 


9*9* 


P^75  Phone  Patct*  ......  *.*.*:. ..,..  79.9S 

lA-1  6D0  ohm  balanced  line  amplifier. . . . .  49.95 

CW'75    Electronic  keyer 79.95 

SP-7S  Speech  processor 159.00 

WH-7  160-lOm  20/20d/2kw  wattmeter  ....  129.00 

7073  Hand  microphone  w/plug  , 29.95 

7077  Desk  microphone  w/pfug 49.00 


^-^^  ^        TV330OLP 

I  ■• 

Dijf7imv  lty,iih: 

DL-300  30Cw  dry  dumm^  load $26,95 

DL-1000  Ikw  dry  duflimy  load 59.95 

FA-7  Cooling farf  Itn  DL-IOOO ... ... 29.00 

tquipmetu  pratertars: 

1549  200w  antenna  surge  shunt $24.95 

3001  Replacement '  p*ll"  etemem  5  00 

HP-700  Receiver  front -end  protector 90  00 

TV-42-LP  lOfM  80  10m  low-pass  hiler $14  95 

TV-33O0-LP  Ikw  80  lOm  to*  pas$  filt 29  95 

TV-300-HP  300  ohm  high  pass  filtei  14.95 

TV-75-HP  75  ohm  high'pass  hlter 17.95 

Line  fiitors. 

LF-2  2oLjllet  AC  line  lilter $39.95 

LF-6  6  oullel  AC  line  lilter 59.95 

DMM  Auto  S£ale  digftal  multimeter 95.95 


—   1 


,rr  rrCLJar 


ESR-24  Earth  station  receiver  _ _.,  $745  00 

SC/ESR  Single  con^^ers^on  down  converter    250.00 
SPH-24  Splash  proof  housing , . GO.OO 


Biuf  wUk  Coic(uieKce 

AES  has  Over  24  years  of 
Experience  in  Mail  Order 


ViSA'' 


Use  your  CREDIT  CARD! 

E-X-P-A-N'D-E-D  WATS  PHONE  HOURS 

Ouf  Milwaukee  Headquarters  wM  answer  the 
Nationwide  WATS  Nne  1>8CN}-S&S-0411  umtl  8 
pm  (Milwaukee  time)  Monday  thru  Thursday. 

PJease  yse  WATS  tine  for  Placing  Orders 

For  olher  tniofmation,  etc  please  ose  Regular  line 

HOURS:  Mon,  Jue,  Wed  & 
Fri  9-5:30;  Thurs*  9-8;  Sat  9-3 

*Las  Vegas  ^Flof  iris  ^Inres  NOT  open  Thursdayfivenings 


Call  Toll  Free:  1  -800-558-04 1 1 


In  Wisconsin  (outside  Mliwaukes  Metro  Area) 

1-800-242-5195 


*5n 


inc. 


4828  W.  Fond  du  Lac  Avenue;  Milwaukee.  Wl  53216  -  Phone  (414)  442-4200 


WICKLIFFL  Ohio  44092 

2S940  Euclid  Avenue 

Phone  (216)  585-7388 

Ohio  WATS  1-800' 362-0290 


—  AES  BRANCH  STORES— 

ORLANDO,  Fla,  32803  CLEARWATER,  Fia,  33515 

621  Commonwealth  Av«.  1898  Drew  Street 

Phone  (305}  894  3238  Phone  (813)  461-4267 

Fta.  WATS  I  800-432  9424  No  In^State  WATS 


Outside  Ohio  1-80O-321-3594    Outside  Fla.  1^800-327^1917 


No  Nationwide  WATS 


LAS  VEOAS^Nev.  89106 

1072  N,  Rancho  Drive 

Phone (702) 647-3114 

No  In-State  WATS 

Outside  Nev.  1-800*634^6227 


Associate  Store 

CHICAGO,  tllinois  60e30 

EmCKSONCOMMUfVf  CAT  IONS 
5456  N,  Milwaukee  Avenue 

Phone  (312)  631-5181 
Outside  ILL  1-800-621-5802 


73Magazine  •  June,  1982     91 


checks  payable  \o  BatavM  HamFasi,  Cfo 
Gram,  Inc..  Box  572,  Qaia^ta  NY  1405<3 

HARBOR  SPRINGS  m 
JUL  17 

The  Sirails  Area  Amateur  Radio  Club  wiH 
tidld  lis  annual  hamfest  on  July  17>  1382. 
Irom  9:00  am  to  4ifX)  pm  ai  rhe  Harbor 
Springs  Hbgh  School,  Harbor  Springs  Ml 
Donatior^s  are  S2.00  ai  the  door  and  table 
space  is  S2.50  Ooof a  will  be  Op«n  a1  &;00 
am  for  setuf^s.  Lunch  will  ba  sarved  ttom 
11.00  am  to  T:00  pm  and  reHreshmams  will 
be  available  durmg  ttie  day.  There  will  be 
one  mam  door  pttie  and  s^naltef  pfizes  will 
be  awarded  hourly  The  ^hool  pafhing  lot 
ts  tree  for  seir-containad  RVa  to  use  tor  an 
ov^mighi  stay  and  many  places  of  rnierest 
to  VLs  a/e  available  nearby,  Talk^m  on 
52:<52  and  146  07^6?  For  more  details, 
contact  Mr.  Bernie  Sloinlch  KBOAE,  GOO 
Anr>  Street.  Hartx>r  Springs  M\  49?40.  or  call 
16161-526-561* 

EUOEN£  OR 
JUL  17-1S 

Ttie  Lane  County  Ham  fair  wift  be  heid 
on  July  17-1B,  1902,  at  the  Oregon  NatiOiv 
al  Guard  Armory.  2515  Qentann^ai.  Eu- 
gene OR  Tickets  are  MOO  «ach  and  anU- 
Ue  ttie  holdef  to  one  extra  drawing  ticltdt 
Tree  if  purchased  b«fote  July  1st  Doors 
will  open  ai  6:00  am  Saturday  and  Sunctay 
Featiures  will  include  a  swap  arid  stiop  at 
SSOO  a  table,  a 2-meier  t>unnv  hunt,  wom- 
en's activities,  a  ctilldren's  corner,  com^ 
pyter  derrtos.  techntcal  seminarsK  OCWA. 
and  a  grand  onie  of  an  I  com  730  lowDariKl 
mobile  rig.  There  wJU  b«  an  all-^ay  snack 
bar,  tree  parking  tot  RVs  {no  hooKupS), 
and  a  Salgrday  pol  luck  supper  ai  6:00  pm. 
Talk-in  on  52/,52.  \m,2^M.  147  66/26. 
and  3.910  HF.  For  advance  llckels,  send 
an  BASE  to  Eunbce  Qrown  WA7M0K,  2456 
Corral  CoufL  Springtield  OH  97477,  Or 
phone  |S03h747-793fl. 

WASHINGTON  MO 
JULia 

The  Zero  Beaters  Amateur  Radio  Club 
wHl  hold  Its  hamfesi  on  Sunday,  Judy  16, 
19&2,  at  the  Washfngiori  Fairgrounds, 
Washington  MO.  Talk  in  on  147,64/24  For 
more  Jnfornnaiioa.  contact  Rich  Noelkfj 
WA0NUI,  Rte.  3,  10  Hicriard  Drive, 
Washing  Ion  MO  63090. 

SOWLIKG  GREEN 
JUL  16 

The  17th  annual  Wood  County  Ham-A- 
ftama  will  be  held  on  Sunday,  July  18. 
1962,  at  the  Wood  Couniy  Fairgrounds, 
Bowling  Greer^  OH.  Gates  will  oper^  at  TO 
arn  with  free  admtssion  and  parking. 
There  will  be  drawtrtgs  for  prtj^esi  tickets 
are  $t.  50  in  advance  and  $2.00  ai  ihe  gate. 
Trunk  sales  space  and  food  wih  be  avail- 
able. Advance  table  rentals  are  $3.0Q  lo 
dealers  only  Saturday  setup  available  un^ 
III  8:00  pm  KBTIH  talk  in  on  52.  Fof  more 
info  or  dealer  remaps,  sand  an  SASE  to 
Wood  County  ARC.  c/o  S.  Irons.  PO  Box 
73,  LuOkey  OH  4344^ 

CANTON  OH 

jyLi« 

The  Tusco  Radio  C»ub  {WSZXt  and  the 
Canton  Amateur  ffadto  Club  (WSAU  will 
hold  the  81  h  annual  Hall  of  Fame  Hamfest 
or)  July  18,  1962.  at  the  NimishiUen 
Grartge.  5461  Easton  Street  Louisville 
OH  Admission  is  S2  50  m  advance,  13.00 
at  Ihe  gale.  ar>d  children  under  t6  will  be 
admitted  free  The  flea  market  witl  open  it 
9:00  am  and  activthes  wilt  include  awards, 
forums,  dealers,  and  XYL  programs  Tal*t- 
inon  I46.1&r  70.146.52/^.  and  147  72/12 
For  reservations  and/Of  intormation.  con- 

92     73Magazme  •  June*  1982 


tact  Butch  Lebold  WASSHP,  10677  Hazel- 
view  Avenue.  Alliance  OH  44601,  or  phone 
(216h82l  6794, 

GRAND  RAPIDS  MN 
JUL  IS 

The  Range  Wide  Hamfest  will  be  herd 
on  July  1 8,  1902.  from  10:00  am  to  4:00  pm 
al  Qunn  Par^,  HighwaySS,  6  mites  north  of 
Qvand  Rapids  MN.  Admission  and  ta(>les 
are  tree.  Bring  the  family  lor  a  ptcntc. 
games,  prizes,  and  tun.  Parking  and  camp- 
grounds wiU  be  availabte  TalK-m  on 
146.28/86  an<|  .52-  For  more  tnformaiion^ 
write  Bob  WD4AAF.  736  Crystat  Springs 
Road,  Grand  Rapids  MN  55744,  pr  call 
(216^326-2268  (evenings}. 

POUGHKEEPSte  NY 
JUL  24 

Th€  Mt  Beacon  Amateur  Radio  Club 
will  hold  lis  annual  hamfesi  on  July  24, 
1182.  I>eginning  at  8:00  am,  at  the  Art*ng^ 
ton  Senior  High  School,  Poughkeepsie 
H  y  Adm  IS?  I  on  is  S2 ,00  (X  Y  Ls  and  chi  tdr  en 
admitted  tree),  tatlgatmg  space  is  S3. 00 
^includes  i  free  admission^  and  a  table 
space  IS  MOO  (includes  i  free  table  and 
admission}.  Thare  will  be  ttie  tree  ilea  mar- 
ket tables  indoors,  parting  door  prizes,  an 
auction  starting  at  2:00  pm.  and  ho!  food 
and  beverages.  Talk- in  on  146.37/.97  and 
146.52  For  additional  infom^aiion,  ad- 
vance tfckets.  or  registration,  send  an 
SASE  to  WaJt  Obiter  WA2ZGN,  Norlh  Hilt 
side  Lake  Road.  Wappingers  Falls  NY 
12590,  or  phone  i9t  41-226-6636. 

WEST  FRtENOSHIP  MD 
JUL  25 

The  Baltimore  Radio  Amateur  Televi^ 
sion  Society  (6 RATS |  will  hold  its  annual 
BRATS  Maryland  Hamfes!  on  Sunday,  Ju* 
ly  25,  1982,  at  the  Howard  Courrty  Fair- 
grounds, Route  MA  ai  Route  32,  adjacent 
to  Interstate  70,  aboui  15  m^les  west  of 
Baltimore,  in  West  Friendship  MD.  Indoor 
tables  with  ac  power  are  Si 5.00  each; 
without  ac  power,  SI 0.00  each.  Indoor  tait 
gating  Is  S5.00  per  space;  outdoor  tailgal 
ing  Is  S3.00  per  space.  Overnight  RV  hook- 
ups will  be  av3iiat>le.  For  more  Intorma- 
lion  and  reservations,  write  to  BRATS,  PO 
Bom  5915.  Baltimore  MD  2i;^QB, 

CENTREV1LLEMI 
JUL  25 

the  Amateur  Radio  Putsiiic  Service  As- 
sociation of  Si  Joseph  County  Ml  will 
hold  Its  4th  annual  swap  and  shop  on  July 
25,  1982.  at  the  St  Joseph  County  Fair- 
grounds.  Centre ville  Mt  Doors  open  at  8:00 
am.  Tickets  are  $2.00  in  advance  and  S3.Q0 
at  the  gate,  indoor  tables  ar^SaoO  Trunk 
sales  are  free  Cannptng  ts  available  Satur- 
day ntgh!  only  for  S6.00.  Talk^n  on  146.52 
For  more  information,  contact  Dennis 
CtJilef  NSDOU.  3051  2  Avenue,  Vickesburg 
Ml  49097 

WHEELING  WV 
JUL  25 

The  Triple  States  Radio  Amateur  Ctut? 
will  hold  its  4tli  annual  tiamfest  on  Sun- 
day, Juty  25, 19&2,  from  9:00  am  to  4:00  pm 
at  Wheeling  Park,  Wheeling  WV.  Arlmis- 
sion  IS  S2-00 fSO^SO);  children  under  t2  will 
be  admitted  fpes.  T^e^e  will  t>e  major 
prizes  plus  door  prizes  every  15  minutas;  a 
l5-minute  auction  every  txiur  on  ttK  hour 
free  parking  for  1,D{|0  carsi  refreshments; 
ARRLrSWOT/TSRAC  boottis;  indoor  deal- 
er displays:  and  a  flea  market.  There  will 
be  satups  the  night  before  or  at  7:GQ  am 
Sunday  morning.  Tatk-in  on  146.i1/-9"t  and 
14^34!,  For  advance  dealer  regiistraticn. 
elecincal  outlet  and  table  requests.  sut>- 
missjon  ot  free  ads  for  the  club's  tiamfest. 


Issue,  and  more  Intormation,  contact 
TSRAC,  Box  240.  flO  2.  Adena  OH  43901. 

prnsaunGH  pa 

AUQ1 

The  45lh  annual  South  Hills  Brass 
Pounders  and  Modulators  Hamfesi  will  be 
t>eld  on  August  1,  T962.  trom  10:00  am  to 
4:00  pm,  at  South  Campus.  Community 
CoimgB  ot  Allegheny  County.  Pittshurgh 
PA  Admission  is  S200  or  3  lor  $500. 
There  will  be  compgler.  OSCAR,  and  AT^ 
demon  si  rations,  as  well  as  a  Ilea  market. 
Talk  in  on  140  13/73  and  t46.52  For  tor- 
Iher  information,  contact  Andrew  L  Pato 
WA3PBD,  1433  Scnautt^r  Drive.  West 
Homestead  PA  15120. 

ANGOLA  IN 
AUG  t 

TheSteutien  County  Radio  Amateurs  will 
hold  the  24m  annual  FM  Picnjq  and  Ham 
fest  on  SitTHfay,  August  1  t9ft2.  al  CrooKed 
Lalte,  Angola  IN  Admission  is  S2  50.  Tlt^e 
wriE  be  prizes,  picmc-siyie  BBQ  chiehen.  in- 
side ladles  tor  exhibitors  and  vendors,  and 
overnight  camptng  {A  fee  wf  1 1  be  charged 
tiy  county  pmfk^  Talk-in  on  14§.52  arid 
I47,8tf2t 

SAUK  RAPIOSMN 
AUGB 

The  St  Ciotjd  Radio  Diub  will  hold  its 
annual  hamfest  on  Sunday.  August  8, 
1962.  Irom  8  30  am  to  4:00  pm,  at  Ihe  Sauk 
Rapids  Municipal  Park.  Sauk  Rapids  MN. 
Talk'in  on  14&  34/ 94  Fot  more  inlorma^ 
lion,  contact  Mike  Lynch.  2ii6-iai  Street, 
St  Cloud  MNSeSOt.  oread  (612|  251  2297 

TACOMA  WA 
AUG  14-1S 

The  f^adlo  Ctub  ot  Tacoma  witl  hold 
Hamfair  82  on  August  14-15,  1982,  at  the 
PacMIc  Lutheran  University  campus,  Ta- 
coma WA,  Registration  Is  $5.00  and  dinner 
Is  $7,50,  Acilvities  will  include  technical 
seminars,  a  flea  market  commercial 
booths,  an  ARRL  mealing,  a  repealer  to- 
rum,  a  VHF  tweak  and  tune  clinic,  prizes, 
rallies,  and  a  loggers'  breakfast.  Talk  in 
on  147.flB,i'.28.  For  more  inlormailon,  con- 
tact Grace  Teitzel  AD7S.  701  So.  120th,  Ta- 
coma WA  9S444.  or  phone  [206)-S64'8347. 

TIOGA  COUNTY  PA 
AUQ21 

The  Tfeoga  County  PA  ARC  flth  Annual 
Amateur  Radio  Hamfest  will  beheld  on  Sat 
urday,  August  2t.  1982.  tromOBOO  to  1600  at 
a  new  location  at  Island  ParK.  jusi  otf  US 
Rte  15,  Biosstiufg  PA  There  wiH  be  a  Ilea 
market,  lood.  tree  camping,  an  auction,  an 
H/T  door  pnze,  etc  Talk-in  on  ISI/.TO  and 
52.  For  more  information  or  advance  tick- 
ets, write  TiOQa  Co  ARC.  PO  Box  56,  Mans- 
field PA  ie933.  or  contact  Paul  Sando 
KG2AZ  606  Reynolds  Street.  Elmira  NY 
14904  on  .19^  79  or  9&  36 


MARYSVtLLE  OH 
AUG  21-22 

The  Union  County  Amateur  i^adio  Club 
will  hold  the  Marysvlile  Hamfest  ortSatur' 
day  afternoon  and  aH  day  Sunday.  August 
21  22. 1982.  at  the  fairground  mMarysvi lie 
inear  Colun^bus^  OH  Admission  ts  $2.00 
in  advance  or  S3.00  at  the  gate  Flea  mar^ 
ket  space  is  St.OO.  Food,  beverages,  and 
freeoverncght  camping,  movies,  and  pop' 
corn  will  be  avaitabie.  Featured  on  Satur 
day  night  will  l>ea  free  square  dance  (with 
a  live  band}  followed  by  a  tjig  country 
breakfast  avaiiabFe  aji  nigni  Door  gnzes, 
iar^ies^  programs.  ar*d  ARRL  FCC,  and 
MARS  meetings  will  tw  featured  on  Sun< 
dajr.  Talk-in  on  146.52  and  147  99/39  For 
additional  inform  a!  ton.  write  UCARC. 
13613  US  36.  MarysvJtIe  OH  43040,  or  call 
IS13>6444346S. 

AUGUSTA  ME 
SEP  10-12 

Thie  Augusta  Emergency  Amateur  Ra^ 
dio  Unit  will  hold  the  ARRL-approved 
Northeast  Area  Hamfest  on  September 
10-12;  1982.  at  Wmdsor  Fairgrounds,  lo- 
cate just  off  Route  17,  !0  miles  east  of 
Augusia  ME.  Facil^jties  for  campers  will  be 
available.  Activities  will  include  a  flea 
market  and  regularty  scheduled  speakers 
and  cSemonstrations,  as  well<  as  the  usual 
events.  Tajk<in  on  146.22/.&2  and  3940. 

ADRfAN  Ml 
SEP  26 

The  Adrian  Amateur  Raifio  Club  will 
hold  its  toth  annual  tiamfest  on  Sunday. 
Septemt>er26. 19B2.  al  the  Lenawee Coun* 
ty  Fairgrounds,  Adrian  Ml.  Talk  in  on 
146.31/.91  (WSTQEK  For  tickets,  tables, 
and  more  information,  contaci  the  Adrian 
Amateur  Radio  Club,  Inc..  PO  Box  26.  Adri- 
an Ml  49221. 

NEW  LONDON  NH 
SEP  26 

The  61  h  annual  Connecticut  Valley  FM 
Association  Hamtest/Ftea  Market  will  1>b 
held  on  Sunday.  September  36,  19Q2,  from 
9:00  am  to  bW  pm,  al  King  Ridgo  Ski  Area, 
New  London  (MH,  Adull  admissions  are 
S2.00,  a  flea- market  setup  is  $5.00,  and 
children  under  16  wHI  be  admitled  froo. 
King  Ridge  will  have  the  food  concession, 
For  more  in  formation,  contact  Francis 
Callahan  KAlBWE,  Bok  173.  East  Wamng- 
fo,fd  VT  05742. 

CHICAGO  IL 
OCT  17 

The  Chicago  Citizens  Rad^o  League  will 
hold  its  first  annual  hamfest  on  October  1 7. 
1983.  at  the  North  Shore  American  Legion 
Post.  6040  H.  Clark,  Chtcago  IL  from  7  00 
am  to  4  00  pm.  Due  to  limited  table  space, 
table  reservations  must  be  made  in  writing 
lo  Fred  Marlette  KA9FUO  tS5l  W.  Chase. 
Chicago  I L  60626 


HAM  HELP 


I  would  appreciaie  hearing 
from  anyone  who  has  made  any 
rrtodificatlon  to  the  Kenwood 
TR-7500  2-meter  FM  transceiver. 

R.  L  Rabensteln  WB3JJG 

2904  W.  Pine  Avenue 

Altoona  PA  16601 


I  am  looking  for  m  for  mat  ion 
regarding  the  serial  numbers  on 
Vibroplex  units  and  the  year  of 
their  manufacture. 

Richard  Randall  K6ARE 

1263  Lakehyrsi  Rd. 

Livermore  CA  945S0 


AZDEN  •   NEW!  *  AZDEN  •  NEW!  •  AZDEN  •  NEW!  *  AZDEN 


THE  GIANT 


COMPANY 


REVOLUTIONIZES  THE  STATE  OF  THE  ART 

INTRODUCE  THE  BRILLIANT  NEW  PCS' 2800 


AND 


MICROCOMPUTER  CONTROLLED 

SUPERIOR  COMMERCIAL  GRADE 


• 


FM  TRANSCEIVER 


AZDEN 

■-"     ^ —« n         —       _ 

ras-»M 

MKr 

I/NF 

U.         lAAM 

• 

• 

J 

£                     ,i                    hA 

^mJ  ^»J  ^m 

'      10CMI            KM      /   Mgm 

1 

y-x 


KiPeWQL    IWXrUSOL      HSH/UOW      ^0.&9QL 


•U-   -v^-    ' 


c«u 


ei;  » 


Fl«' 


COMPARE  THESE  FEATURES 
WITH  ANY  UNIT  AT  ANY  PRICE 


•  FREOUENCY  RANGE:  Receive  and  transmtt:  23.000  to  29.995 
I^Hz,  lOKHz  steps  with  built-in  -100  KHz  repealer  offset 

•  ALL  SOLID  STATE-CMOS  PL  DIGITAL  SYNTHESIZED. 

•  SIZE;  UNBELIEVABLE!  ONLY  6  3/4"  x  2  3/8"  X  9  3M". COMPARE! 

•  MICROCOMPUTER  CONTROLLED:  All  scanning  and  frequency- 
control  fynctions  are  performed  by  microcomputef. 

•  DETACHABLE  HEAD:  The  contrat  head  may  t>e  separated  from  the 
radto  for  use  in  limited  spaces  and  for  security  purposes. 

m  SIX-CHANNEL  MEMORY:  Each  memory  is  re-programmable. 
Memory  ts  retained  even  w^en  the  unit  is  turned  off, 

m  MEMORY  SCAN:  The  six  channels  may  be  scanned  In  either  the 
''busy"  or  ^acanf'  modes  for  quick,  easy  location  of  an  occupied 
or  unoccupied  frequency.  AUTO  RESUME   COMPAREJ 

•  FULL-BAND  SCAN:  All  channels  may  be  scanned  in  either  "busy" 
or  **vacant"  mode.  This  Is  especially  useful  for  locating  repeater 
frequencies  in  an  unfamilrarafea.  AUTO  RESUME,  COMPAREJ 
INSTANT  MEMORY-1  RECALL:  By  pressing  a  button  on^  the 
microphone  or  front  panel,  memory  channel  1  may  be  recalled  for 
immediate  use. 

•  MIC-CONTROLLEO  VOLUME  AND  SQUELCH:  Volume  and 
squelch  can  be  adjusted  from  the  microphone  (or  convenience  In 
mobile  operation. 

•  DIRECT  FREQUENCY  READOUT:  LED  display  shows  operaling 
frequency,  NOT  channel  number.  COMPARE! 

•  TEN  nO)  WATTS  OUTPUT:   Also  T   wall  low  power  for  shorter 


distance  communications   LED  readout  displays  power  selection 
when  transmttling, 

•  DIGITALS/RF  METER:  LEDs  indicate  signal  strength  and  power 
output.   No   more   mechanical   meter   movements   to  fall   apart! 

•  LARGE  '^'INCH  LED  DISPLAY:  Easy-to-read  frequency  display 
minimizes  **eyeS'Off-the^foad"'  time, 

•  PUSHBUTTON  FREQUENCY  CONTROL  FROM  MIC  OR  FRONT 
PANEL:  Any  frequency  may  be  selected  by  pressing  a  microphone 
or  front-panel  switch. 

•  SUPERIOR  RECEIVER  SENSITIVITY:  0.2S  uV  for  20-dB  quieling. 
The  squelch  sensitivity  is  superb,  requiring  less  than  0.1  uV  to 
open.  The  receiver  audio  circuits  are  designed  and  built  to  exacting 
speciflcatrons,  resulting  in  unsurpassed  receJved-signal 
intelligibility. 

•  TRUEFM,  NOT  PHASE  MODULATION:  Transmitted  audio  quality 
is  optimized  by  the  same  high  standard  of  design  and  construction 
as  is  found  in  the  receiver.  The  microphone  amplifier  and  com- 
pression circuits  offer  inteiiigibilily  second  to  none, 

•  OTHER  FEATURES:  Dynamic  Microphone,  built  in  speaker, 
mobile  mounting  bracket,  external  ren^ote  speaker  jack  (head  and 
radio) and  much,  much  more.  All  cords,  plugs,  fuses,  microphone 
hanger,  etc.  included.  Weight  6  lbs. 

•  ACCESSORIES:    15^  REMOTE   CABLE. ...$29.95,      FMPS'4R  A/C 

POWER  SUPPLY $39.95.         TOUCHTONE  MIC     KIT, .  ,,$39.95. 

EXTERNAL  SPEAKER. ...$1800, 


AMATEUR-WHOLESALE  ELECTRONICS  order  now  toll  free 


8817  S.W    129th  Tefrace,  Miami.  FJorida  33176 
Telephone  (305^  233-3631  #  Je\ex    80-3356 

U.S.  DISTRIBUTOR     DEALER 
INQUIRIES  INVITED  ^s 


*y>^j 


CREDIT  CARD  HOLDERS  MAY  USE  OUR  TOLL  FREE  ORDERING  NUMBER 


HAM  HELP 


A  while  back,  Poly  Paks  was 
selling  a  surplus  keyboard^  mi- 
nus the  keytops,  made  by  C-  P. 
Ctare  and  Co.  for  Burroughs 
Ck>rp.  If  anyone  has  one  of  these 
boards  or  extra  keyswitches,  I 
would  like  to  buy  them. 

Ralph  Alexander  WB50RH 

Box  236 
Ufors  TX  79054 

I  recently  purchased  a  Ham- 
martund  Model  SP-600  and  a 
Hammarlund  HC-10  converter 
(less  hookup  adapter).  I  will  pay 
for  manuals  or  any  information^ 
copies,  postage^  etc.«  regarding 
these  two  units  and  their  com- 
patibility. { am  also  in  need  of  an 
adapter  for  the  HC*10. 

C.L  Gant2|  Jr 

SI 5  E.  Fulton  St 

Lancaster  PA  17602 

(7l7)-393-ia62 

i  am  in  need  of  a  tube-spectfi- 
cation  manual  which  covers  re- 
ceiving and  transmitting  types. 

Ljrrv  Schad 

Box  332 

Afton  lA  50830 

I  am  in  need  of  some  donated 
QSL  cards. 

Garv  Mitchell  KHSAC 

PO  Drawer  909 

Pago  Pago,  American  Samoa 

96799 


I  am  in  need  of  schemahcs 
and  parts  lists  for  the  power 
supply  and  tape  reader  of  an 
NCR  Model  400-600  Teletype* 
(power  supply  schematic  no. 
095-0009500  and  tape  reader 
Model  GE  4APTR61G002,  serial 
no.  5523).  Have  copier  or  please 
advise. 

Also  needed  is  a  dial  plate  {or 
copy)  for  the  Phiico  AM/SW 
Model  41^250  radio.  Code  121. 

H.  W.  Wallmaier 

TOO  W,  7 

Washington  MO  63090 

Does  anyone  have  informa- 
tion on  the  whereabouts  of 
VP6LX  (April,  1963}  or 
W2PCJ/KJ6  (August,  1963)? 

George  Osier  KHEDA 

524  eth  St. 

Wwt  Des  Moines  lA  50265 

1  need  a  schematic  and  manu< 
al  for  a  Gonset  G151  FM  Com- 
mynicaior. 

Marlt  Rethtmeyer 

1531  Belmont 

Kansas  City  MO  64126 

I  need  a  schematic,  and  ser* 
vice  and  upgrade  information 
for  the  Sommerkamp  FTdx-150 
transceiver. 

Charles  Wendlar  K2B0Z 

58  South  Airmont  Rd. 

Suffern  NY  10901 


I  would  like  to  correspond 
with  hams  who  have  operated 
with  or  are  operating  with  a  Hal- 
licrafters  FPM300. 1  am  interest- 
ed in  troubleshooting  an  exists 
\ng  problem  and  in  learning 
about  any  modifications  which 
can  t>e  done  on  this  rig, 

Neiir.  HaegerWD6CVA 
14402  Cartefa  Dr. 

La  MIrada  OA  90638 

I  am  looking  for  a  model  DD- 
1C  Spectronics  frequency  read- 
out for  my  Collins  753-3  receiver. 

R.  E  Follz  W7JQ0 

PO  Box  2126 

Sodona  AZ  66336 

[  need  the  service  manual  for 
the  Clegg  **99*er"  6-meler  trans- 
ceiver along  with  any  informa* 
tion  on  home*brewing  a  suitable 
vfo  and  FMIng  the  unrt.  I  wiil  pay 
for  postage  and  copying. 

Kevin  Van  ZullenKA9GWB 
205  Lehman  St. 
Berne  IN  46711 

I  am  looking  for  a  schematic 
for  an  SBE  VHF  power  amplifier, 
model  SB-1  PA. 

Lennox  Bodman  K1NBG 
29  Mt  Vernon  St 

Gardiner  ME  04346 

I  need  a  service  manual  and 
schematic  for  a  Phillips  Tele- 
communications receiver  type 
BX  925A/09  N  R  BC  8380/30502, 

Mark  A.  D'Ornellas  8RtY 

110  Barrack  Si 

Kingston,  Georgetown 

Guyana 


RTTY 

Demodulators 


FSK-1000 


1  1^ 


Here  is  no  camprcimi&e  design  and  construction: 

•  Unparalleled  selectivity  achieved  with  sophis- 
ticaled  limiteHess  design  utHlzirig  ultrash^rp 
acttve  fitters  And  decision  tevel  correction  cir- 
cuits 

•  The  most  fTexible  interface  system  avaHabie  to 
computers  and  high  voltage  loops 

•  Built  In  170  volt  loop  suppty 

•  Selectabte  bandwidths  of  SS  and  100  Hz,   (copies 
110  Baud  ASCttI 

«  Continuously  tunable  shift  coverage 

•  Rugged  construction  -  commercial  quality 
throughout 

•  Full  comptement  of  rear  panel  connectors  for 
easy  interface 

•  Keyboard  activated  switch  for  break  in  operation 

•  Individual  tuning  meters  and  LED^s  for  quick, 
accurate  tuninq 


I^SKSOO 


Ordlifr  dirvi^t  on  Visa  or  WC 


700  T  ay  tor  Rpad 
Columbus,  ONa  41230 

TM     Call   C6m)    eGJi-24£4 


This  RTTY  demodulator  is  designed  for  computer 
interface  but  Is  a  fine  stand  alone  unit: 

•  Easy  computer  interface  with  RS-232  or  5  volt 
togic  signals 

•  Three  shift  coverage  without  straddle  tuning 

•  Setectable  band  widths  give  you  optimal  Baudot 
or  110  Baud  ASCM  copy 

•  tnput  bandpass  preselector  using  active  filters 

•  High  voltage  loop  keyer  output 

•  Autostart  built  in 

•  Three  shift  AF5K  keyer  plus  narrow  shift  CW  ID 

•  Fully  wired  and  tested:     ready  to  copy! 

•  The  FSK'SOO  is  the  best  demodulator  available 
for  under  $500.00  ffexcept  for  our  FSK-1OO0!) 

•  Positive  tuning  with  meter  and  LED's 


I  need  schematics,  technical 
manuals,  and  crystal  informa* 
lion  for  an  ANA/RC-52  radio  set 
(T-891/VRC.52  and  R-1146/ 
VRC-52).  I  will  pay  any  reason- 
abJe  chargas  for  copying  and 
postage,  or  will  copy  and  return^ 

John  Wilson  KC1P 

15  Kennedy  Rd. 

Cambridge  MA  0213d 

I  would  like  to  hear  from  hams 
who  use  the  Exidy  Sorcerer  lor 
ham  applications  of  any  nature* 

John  Stover  N9AMC 

1521  Medora  St, 

South  Bend  IN  46628 

I  would  like  to  convert  a  model 
1-636  Royce  SSB/AM  23-channel 
CB  radio  for  use  on  the  lO-meter 
band.  Any  information  on  how  to 
do  ttits  would  be  helpful 

Lyle  G.  Plum  WB7PX0 

3807  East  Emile  Zola 

Phoenix  AZ  85032 


schematic  and 
Hammarlund  HQ 
All  costs  will  be 


t  need  a 
manual  for  a 
100  receiver. 
gladly  paid. 

Fatrlcit  J.  Chlvfngton  WSJ  IB 

1478  Grace  Ave. 
Lakewood  OH  44107 

I  need  a  schematic  and  any 
technical  advice  for  keyboard 
assembly  055-1 3-02- 70REV  by 
Incoterm  Corp..  particularly  for 
RTTY.  All  reasonable  expenses 
refunded- 

W.  G.  Mott  G4KLP 

2  London  Bridge 

London,  SEI  9RB 

England 


ALL  BAND  TRAP 
VERTICAL  ANTENNAS! 


FULL  1.*th  WAVE  -  *il  BuTEtmf  Auiomktpc  £*!«ciifln, 
wnh  etownn  Mi-Q  Tr»p»  3  MoBili-AuL  ni-f'  luooonifia 
Ground  Of  rtjof  rvour^t.  HEAVY  DftutH'e  *»ll  SCAmlcit 
AiumJniim  4«*»r  i (Matron  -  HI  STRENGTH  FISEft^ 
QLASS  TUBING  OVER  -ALL.  NO  V^OBBLY  LU- 
MPY TRAPS  -  NO  UNSIGHTLY  CLAMPS  nrnttind 
Sarnt  tH*  tH  the  wMy  yp  1  V4"-  Trapt  mdtitn  hit  id  e 
Yeu  can  ui*  n  in  i  I  ft.  iQ.  B««4iy«r(]1  NaiQiibDrA  will 
hiBV»r  k*iflwi+ii»  ift  a  H^-Powsr  ALL  O^ectlorr  DK  Am- 
iwnnm.  FOft  APARTMENTS,  MOW  HOUSES,  MO- 
ilLC  HOMES  -  CONOOS  itf3>  whira  minlfnuin  tpac« 
and  nail  tppqirencn  la  M  ANDAtOPYl  Jriltanl  "Urlvg 
In'^DPQun.f)  mgunt  (Inclutfad^  Uia  wltti  Or  WHtiDut  radlaia 
i;4r)dL>dad)  {An  arngla  fOpf  fPDunt  *E:nF«l COMPLETELY 
PRETUNED  NO  ADJUSTMENTS  NEEDED  EV£R! 
NO  TUNER  NEEDED  Ovtr  Al  Band*  kxcapi  60 
mwHt  <^  40C  HC]  SWR  t-i  to  2-1  it  Am^  Htgai.  S^nct. 
S0239  cen*i*ctar  -  50  afirn  t$r  mnf  Janflth  RCS8U  - 
RGQU  liadVn*.  Miicnaa  ALL  MAKES  TRANSCICV- 
ERS  20OO  WiU  PEP.  ktout  oower.  SMppad  -PRE* 
PAID  \H  USA.  AuamMtb  in  Ki  mun.  ualn«  pniy 
i«f  ■  w  drtvv.  WE  A  T#|  EH  P  R  OOFl 

N«.*AVTflO-10  —  S  Sand t9't\*  ^179^5 

N9-  AVT40*10 4  BaoQ  — .  iS3'  S129  95 

Ne  *   AVT»0-IO—  3  &pnd  —   tfft"  SSg-^S 

5EMD  FULL  PRICE  WOn  PP  Of  L  IM  USA  (C*r^ada 
»i  9S  CKl  Eitra  for  coitagt.  claritaL  Cv«tom«  clcioi' 
ssrtf«*  tfiisi  VISA  ,  MASTER  CA«D  m  AMERICAN 
EXPRESS  Gnk  Num^f  and  C«  a»t«.  Pfvt-SOS- 
23e-S333  9AM.ePM  .rtabdava^  Wa  ifk^  kn  £-3 
dajrt  Prtcei  wl  mcMMfti.  m  wam  WOM 
AND  SAVE  A«  Aitiafiftai  Gttaramatd  lor  1  ^aaf 
*  10  di!r  monii)!  bac^  iHal.  if  rtiuffwd  a%  new  cunHi- 
ion.  Tret  Itt^  __ 

1^80 


WESTERN     ELECTRONICS 
Dant.   AT*  6  Rtama^  Htt^l 


eee*T 


94     ?3  Magazine  •  June,  1982 


MM  HELP 


[  am  booking  for  active  Radio 
Shack  TRS^ao  and  Sinclair  ZX-81 
computer  user*s  nets,  I  am  inter- 
ested in  when  these  nets  meet 
and  the  frequencies  they  meet 
on.  I  am  also  interested  in  the 
locations  of  the  following  air- 
craft and  marine  beacons  (all 
frequencies  In  kHz}:  A  320, 
eNO-396.  BNU-396,  COR-206. 
EBY-391,  FR355,  GWF-282, 
HMM*410,  INE'521.  LYI-416» 
MF-371,  NO-351,  01376, 
PNA'392.  QQ'401.  RD-410, 
SL'288.  TA-390,  UNB  388,  Vl-220, 
XSCK278,  and  ZP-368. 

Qary  Payne  KE6CZ 

1347  E.  Dakota 

Fresno  CA  93704 

I  need  a  manual  for  the 
Beckman-Berkley  model  7751 
frequency  counter  and  a 
1000-kHz,  11frV  ac  crystal  oven 
for  same,  I  am  also  looking  for 
the  manual  for  the  312B4  Collins 
speaker  console,  i  will  purchase 
outright  or  copy  and  return. 

Bill  Mellsen  WB4APC 

Ri  2,  Bom  253E 

RadcllffKY  40180 

I  would  like  to  obtain  a  motor* 
divider  PC  board  number  1 A2  for 
a  GXC5  military  FAX  unit.  A 
schematic  and/or  manual  for 
this  would  be  handy, 

Al  Clkas  KA9QPL 

2112  Stonehenge 

Springfield  I L  62702 

I  need  schematics  or  any  in* 
formation  for  the  Hammarlund 
HQ110,  Hammarlund  HQ180, 
and  Hammarlund  HX500  trans- 
mitter. I  also  need  information 
on  the  Teletype®  28RO  teietype 
machine  and  the  Gonset  G-50 
6-meter  Communicator;  and  in- 
structions on  how  to  convert  the 
Communicator  to  FM* 

Tom  Blessing 

294  Helen  Ave. 

Xeoia  OH  45385 

(513^372  9341 

1  would  like  to  use  my  TBS^ 
Model  I  for  SSTV  work  and 
would  like  to  get  in  contact  with 
anyone  who  has  information  on 
how  to  do  this. 

Dale  Clarlc  N9APX 

40194  N.GIendale 

Zion  IL  60099 


I  am  looking  for 

•  the  instruction  booklet  for  us- 
ing  the  Johnson  transceiver 
tester 

•  information  on  how  to  convert 
the  Heathkit  SB310  receiver  for 
10-  and  15-meter  band  coverage 

•  information  on  how  to  modify 
the  Heathkit  SB102  for  more  so- 
phisticated operation 

I  will  copy  and  return  or  for- 
ward payment  for  the  above, 

Robert  Ross  VE3LPJ 

4  Meadowlane  Or. 

Brampton,  ONT  L6W  2R4 

Canada 

Is  there  a  reader  of  73  who  can 
write  an  articte  about  the  Japa- 
nese radJO*intercept  training 
program  that  took  place  at  the 
Eastern  Signal  Corps  Training 
Center  in  Ft.  Monmouth  NJ  In 
1944? 

Gordon  E.  Hopper 

75  Kendall  Ave. 

Framlngham  MA  01701 

I  am  interested  In  the  1750- 
meter  band  and  wouJd  enjoy 
hearing  from  someone  who  is/ 
was  using  this  frequency.  I  am 
interested  in  learning  about  re- 
ceiver conversion  and  transmit- 
ter design,  as  well  as  activity  on 
this  band. 

Rex  FauEkner  N4EYE 
3413  Covington  Dr. 
Augusta  GA  30909 

An  amateur  in  the  ivory  Coast 
la  looking  for  a  RTTY  program 
and  interface  to  use  with  the 
Atari  800  computer.  Can  anyone 
help  me  to  help  him? 

FredTrick,  Sr  KB9UB 

Zetlred  Company 

PO  Box  265 

North  Manchester  IN  46962 

Wanted:  Robot  Model  70 
SSTV   monitor,   regardless   of 

condition. 

Dante  Venlnere  KA4JRE 
17831  NW  61  Ave. 
Hialeah  FL  33015 

Wanted:  amateur  radio  QSL 
cards  prior  to  1930  for  old-time 
display. 

Oave  Noon  VE3tAE 

19  Honeysuckle  Cr 

London,  Ontario 

Canada  N5Y  4P3 


I  am  looking  for  a  schematic, 
service  manual,  and  connec- 
tions for  a  Motorola  Twin  V 
Trans-type  CC  3006  6/12-voit  ra- 
diophone, model  W43GGD'2.  I 
am  also  looking  lor  information 
on  the  BC733F  radio  receiver.  I 
will  pay  all  costs  for  postage 
and  handling. 

William  Pence 

600  Old  Stage  Rd. 

Cave  Junction  OR  97523 

t  need  a  schematic  or  any 
other  information  on  the  model 
300/600  digital  counter  sold  by 
Crescent  Wire  and  Cable  Com- 
pany, circa  1976. 

Harold  May 

428  Phinippa 

Hinsdale  IL  60521 

I  need  a  schematic  and 
operating  manual  for  a  Knight 
KG-2100  dc  oscUioscope. 

Joe  Bische  KA4HAG 

341 2  29th  St.  W* 

Bradenton  FL  33505 

Our  club  Is  fn  dire  need  of  a 
service  manual  for  a  Johnson 
Thunderbolt  linear  amplifier, 
catalog  #  240-353. 

Ronald  Daly  WBAZN1 

Hot  Springs 

Amateur  Radio  Club 

Box  365 

Hot  Springs  SD  57747 

I  need  schematics  for  the 
2^meter  Edgecomm  mobile 
radios  25A  and  3000A,  I  will  pay 
copy  costs  and  postage. 

Rudolph  Fallang  KA7DTA 

717BSE6th 
College  Place  WA  99324 

I  am  looking  for  a  DG-5  digital 
display  and  a  DS-1A  dc-dc  con- 
verter for  a  Kenwood  TS-520S. 
Please  state  condition  and 
pricep  including  shipping. 

John  R  lorlo  W04MWH 
622S  Longvlew  Dr, 
Port  Rlchey  FL  33552 


I  am  looking  for  a  Vocallne 
AT-30  420-MHz  transceiver. 
These  units  are  very  old,  but  I  am 
sure  that  one  can  be  found. 

AUen  Harris 

3M7  Worden  St. 

Muskegon  Ml  49441 

t  am  In  need  of  a  source  for 
stainless  spring  rod  in  pieces 
that  are  five  feet  long  and  no 
more  than  1/8"  in  diameter* 
Tapered  replacement  CB  whips 
are  not  quite  long  enough. 

Stan  Hockman  KA4DSK 

636  Flager  Blvd. 

take  Park  FL  33403 


1  need  a  schematic  diagram 
for  a  Collins  651 S  general-cov- 
erage receiver.  I  w\\\  pay  for  the 
copies  and  postage. 

Tom  Kormanik 

14114  St,  Marys  Ln. 

Houston  TX  77079 

\  am  looking  for  a  Hallicraft' 
ers  SX-73  or  SX'73A  receiver.  I 
would  like  to  use  the  receiver  for 
DXing  the  540-1 800-kH2  broad- 
cast band. 

John  Crequa 
1121  Berdan  Av«^ 
Toledo  OH  43612 

i  am  looking  for  a  schemaUc 
and  service  manuai  fcjr  the  mod- 
el 33  Sideband  Engineers  trans- 
ceiver. I  would  also  like  some  in- 
formation on  how  to  convert  this 
rig  for  CW  use. 

Ka  Kanana 

lS6SW0akiynSt 

Palm  Bay  FL  32905 

I  am  returning  home  from  Ger- 
many to  the  Rome/Cartersvilie, 

Georgia,  area.  Any  job  informa- 
tion for  a  First  Class  Ra 
dioteiephone  and  amateur  Extra 
class  licensee  commencing  in 
August  would  be  most  ap* 
preciated, 

B.  G.  Echols,  Jr. 

WA2NYR/0A2EJ 

University  of  Maryland 

Jaeger  Kas.,  Bldg,  26 

APO  New  York  NY  09162 

I  would  like  to  get  a  Novice 
license.  Are  there  any  nearby 
hams  that  could  help  me  on  my 
days  off?  An  hour  every  other 
weekend  would  be  a  great  help. 

Robert  Good 

Box  86 

O  verb  rook  KS  66524 

(91 3)^665' 7463 

t  need  a  service  manual  and 
schematic  diagram  for  a 
Motorola  T4rGGV  series  "Twin 
V"  transceiver.  1  will  pay 
reasonable  copying  costs  or 
copy  and  return* 

Jeffrey  Miller  WD4SM A 
2112  Natahoa  Court 

Falls  Church  V A  22043 

I  am  looking  for  manuals  and 
specification  sheets  for 
Hallicrafters  SX101  and  SX42 
receivers,  I  will  buy  your 
originals  or  pay  for  copying. 

Bob  Allie 

736  Pine  St 

Central  Falls  Rl  02863 

73 Magazine  •  June,  1982    95 


CORRECTIONS 


The  TVRO  fifter/amplifler  and 
demodulator  circuit  boards 
shown  in  **  *Lite  Receiver  IV," 
May,  1982,  are  double^sided.  The 
foil  patterns  for  the  component 


(top)  srdes  of  these  boards  are 
given  here  as  Figs.  2  and  3. 

J.  Richard  ChHstlan  WA4CVP 

Mobite  AL 


Please  note  the  following  In- 
formation: 

•  The  coaxial  collinear  de- 
scribed In  '*Omni-Gain;'  an  ar- 
ticle in  the  May  issue  of  73,  is 
incorrectty  shown  in  Fig.  3. 
The  V-i'Wave  stub  should  be 
shorted  at  both  ends,  as  de- 
scribed in  the  text. 

•  A  complete  kit  of  parts  for  the 
"Fun-Amp"  featured  in  the 
May,  1982,  issue  is  available 
from  Radiokit.  Box  4115» 
Greenviiie  NH  03048  for 
$37.95. 

Tim  Oaniet  NSRK 
73  Magazine  Staff 

The  printed  circuit  board  lay- 
out for  'Home-8rew  a  TVRO 
Downconverter,"  March,  1982, 
should  have  included  both 
sides.  The  lop  and  bottom  of  the 
board  should  be  etched  as 
shown  here  in  Figs.  4  and  5. 

Also,  the  three  coupling  ca- 
pacitors  shown  in  the  parts 
placement  diagram  should  tie 
50-pF  disc  ceramics,  not  the 
.01-uF  ones  shown. 

S.  F.  Mitchell  WA40SR 

Mobile  AL 


Fig.  3.  Foit  layout  for  top  side  of  the  demodufator  board^ 


Fig.  4.  Top  Side  of  doubie-sided  circuit  board* 


Fig.  2.  Foit  layout  for  top  side  of 
the  fiiter/amplifier  board. 

96     73hAagazme  •  June,  1982 


Fig.  5.  Bottom  side  of  downconverter  circuit  board. 


SATE  LUTES 


BEYOND  PHASE  IIIB 

Wfth  the  Phase  1I)B  launch  stillset  for  early  July,  there  are  now  in- 
creasingfy  bright  prospects  for  geosynchronous  launch  opportuni- 
ties for  amateur  satellites.  It  appears  that  there  may  be  two  such 
possibilities  by  the  end  of  1985,  The  first  of  these  is  a  test  flight  of  3 
vehicle  designed  for  launching  a  new  US  defense  satellite.  The  sec- 
ond  is  a  test  launch  of  a  new  European  Space  Agency  (ESA)  vehicle 
called  Ariane4. 

Irk  both  cases,  the  available  pay  load  is  enormous  by  amateur  sat- 
ellite standards:  1200  pounds  for  the  US  launch  and  4400  pounds  for 
the  ESA  flight.  Needless  to  say,  AMSAT  officials  on  both  sides  of  the 
Atlantic  are  pursuing  these  unique  opportunities.  It  has  been  sug- 
gested that  the  time  may  be  at  hand  for  AMSAT  to  coordfnate  Its  ac- 
tivities with  other  amateur  space  groups,  in  order  to  make  full  use  of 
the  large  payloads.  It  may  well  be  a  case  of  "use  H  or  lose  it**' 

SPACEWEEK:  JULY  16-24 

The  week  of  July  t6-24  marks  the  13th  anniversary  of  the  Apollo  It 
flight,  during  which  man  first  set  foot  upon  the  moon.  "Spaceweek" 
Is  a  national  celebration  to  commemorate  this  historic  event  and  to 
demonstrate  public  support  for  space  exploration.  Activities  include 
exhibits,  lectures,  and  a  petition  drive  to  show  our  leaders  in  Wash- 
ington DC  that  Americans  really  do  favor  an  active  role  in  space  for 
the  United  States. 

Spaceweek  activities  in  each  local  area  are  organEzed  by  volun- 
teer groups.  The  Spacewe&k  Handbook,  which  teJIs  how  to  conduct 
a  local  Spaceweek,  is  available  from  the  group's  headquarters  for  a 
$10  donation.  Write  to  Spaceweek  National  Headquarters^  PO  Box 
581 72,  Houston  TX  77258. 

The  above  informaton  is  courtesy  of  A  MSA  T  SareUite  Report,  PO 
Box  27,  Washington  DC  20044. 


oaCJUt   ■  Orbits   Iflf«EKAtiofli   for   J  sine 


OiS'Ali  t  Qxblui   CnidirmBtit^Hi  fox  Jaty 


Dibit    1             Date           Tin* 

Eq.    Croda 

inq         Qfblt   1 

ElKt^           TiB« 

Eq.    ( 

rroisiivd 

tOltJ 

(DegEees   V*»t) 

rCWTJ 

CD^cee»  feptl 

Z1CI3                    1           tilJiJl 

SI .» 

111  21 

1            tllSslI 

J 

^t.9 

Z1437                    2           «ll7i?2 

il.§ 

22i3« 

2           •139142 

H 

t2.t 

niH                   3          iUhSJ 

S4.2 

22i49 

1           Il»{il:fl3 

< 

11445                    4          «116i24 

B5.4 

12063 

4           «eB5|34 

< 

IHii                  ^          «l£«iSi 

a6.5 

22077 

9           0018905 

i 

n«Ta             t       flisii!^ 

B7»7 

22091 

$           0114:3b 

' 

Il«a7                    7           «12«|&T 

SB.S 

2210^ 

7           tB19iaT 

■- 

ai7il                     B           1134120 

9$. 9 

22119 

B           liaizlB 

■ 

mn                     9           fll3«lS9 

91.2 

221 33 

1           «>2ei19 

■1 

;H7^*            J«       •iiiii« 

£6^5 

22147 

li        lij^^ja 

^174}                   U            ft<4i$* 

ST,7 

221fil 

U           itlTtJI 

^ 

217H                  U           tflti?! 

ce^H 

22175 

t?          IMlfl? 

U77§                  13           BilliSa 

7i.i 

^2119 

13           PM«cl3 

■ 

21TI4                 14           flJliJJ 

71.3 

illW3, 

H       mil  44 

niim            15        it33fss 

72 -J 

12217 

15            fl^5il^ 

2l«U                  1£           ti;7,2t 

7S.5 

22Z11 

1*            1*^9:45 

hU 

aim            17       M:)iiST 

74«f 

22345 

17           alMtl? 

13. i 

2lt4l                 IS          tll«i2t 

75 -• 

122^* 

11       Pirti** 

14. • 

31»4                 1-9           «i4i:S» 

7T.i 

2227* 

19        ai]i$i» 

W.t 

21l«*                »          fl43il* 

7S.1 

272*7 

2*        ■n7t5a 

17.1 

21i«i                    21            *V»lfl 

79.1 

223«1 

21           1122121 

it«l 

21 191                  22           fl54il2 

ei.4 

22315 

J2           il3Gt52 

19.4 

ai>li            23       ii^»i» 

Sl.« 

12129 

21           till: 24 

MU 

Uf24                24          iliJiiU 

Bl.B 

12143 

Si           til!):  ^5 

|il.« 

31iJft                 25           iliaiCS 

91*3 

22357 

21           tl4«t2fi 

12.9 

tl»»            ze       flii2i3fi 

s&a 

22370 

24           >eeli4fi 

&e.i 

nut           zT       «ini<i 

e«,2 

223  B4 

27           iitfi : 17 

19.3 

imt           2i       iuiiin 

€7,4 

22iBii 

28           »«lBt4» 

■ 

f§,6 

21Hi                 29           0136 1*» 

«e.6 

22412 

29           PBlStX* 

■ 

ri,e 

a^lVe                 19           91i0iit 

a&,7 

2242C 

3fl           >il4i50 

■ 

?2,f 

22441 

31           tf24E21 

74.1 

DON'T  TIME  OUT.. 

.'TIME  IN' 

'^i  ^    n 

3    Mod«t  Tt-10  tim«  slerl  for  r*pOftt«f  opera 

lor» 

!     tK 

^ 

lo  avo^  lifnifig  puI  lti«  rvpeatei 

*-       ^& 

■ 

Re««rs  on  cAfthm  drop-oul 

1 

Pi«rcing,  6,5  K  Hi  alart  ton* 
Adjustable  timing  p>ert€>d 
C*n  t»  used  as  i.D,  reminder 

Ssnfiiitve  enougn  lor  hflndheici$ 

Model  Tl'tO  assembied 

.$69 

IQO'Va  solid  5tal«:  nd  rvliy 

swilchfng 

Model  TI-IOK 

,  Kit  form.  * , . .. 

,^7 

HandEome  styling,  durable 

case 

PrinledClfCu 

It  Board  and 

Battary  Powered; 

Documentation , 

$20 

ber>&e»  RF  caiti&r  — no  con 

neclions  to  rig    Shipping  and  handNng.  .     add  $3  | 

Wheo  ordeNog,  please  specify  mode(  It  you  5Cl  tsetore 

July -4   TCJH2  receive       | 

a  SlO  discouni  on  ihe  Tl-10:  S5  disciHinr  on  the  Tl  tOK 

COMSTAR  RESEARCH 

•^140 

P.O.  BOX  771 

Madison  Heights,  Ml  48071  \ 

COMMUNICATIONS    DIVISION 


/  /        /     //  •        /       / 

(We  SpeakVbur 
Language.) 

Backed  by  over  54  years  of  experience^  Harvey 
continues  to  offer  the  broadest  selection  and  finest 
service  available  for  the  amateur  radio  comnnunity. 
This  experience  has  taught  us  that  the  ham  needs 
special  treatment  and  that  rs  why  Harvey  has  estab- 
lished a  special  division  dedicated  to  the  needs  of 
the  U.S.  and  foreign  ham  alike. 

One  thfng  is  for  certain.  A  ham  will  never  get  the 
run  around  from  Harvey.  If  we  dont  have  something 
in  stock,  we  say  so  and  will  order  it  for  you— or— tell 
you  where  to  get  rt.  However  we  are  sincerely  dedi- 
cated to  the  ham  community  and,  as  a  result,  our 

expansive  in- 
ventory means 
that,  more  than 
likety  we  will 
have  what  you 
are  looking  for 
in  stock. 


AGA 

Aiftance 

Antenna  Specmiists 

Asuon 

8Barc3f 

Bencher 

B&W 

Centurmn 

C.  a  E 

Cushcratt 

R.  L  Drake 

Gotham  Antennas 

Grundig 

Henry  Radio 

H.M.  Eiectronics 

(com 

Kantfonics 


K.D.K. 

Larsen 

McKay  Dymek 

M.F.I 

Midland 

J.  W.  Miller 

Mirage 

Wm.  M.  Nya 

Pace 

Regency 


Rftron 

Rasself 

Signals 

Sinciaff 

Telex  Hygain 

Tritectric 

System  One 

VoCom 

W.Sh  Engtneering 

Yaesu 


CALLTOLLFREE: 

1-800-223-2642 

Ask  for  Dou  "Joe"  Chin  -  KB2MU 


I 


'S0Hf  Ust  ot  Adver1ist!'r$  Off  page  t  T4 


73  Magazine  •  June,  1982     97 


IBB 


FUN! 


Johrt  Edwards  Kt2U 

78-56  86th  Street 
GiendaieNY  11385 

LOGIC  PUZZLES 

Recently,  on  a  day  when  15  meters  was  dead  and  I  had  nothing 
else  to  do,  1  pulled  out  my  Dover  Books  catalogue  and  began  thumb- 
Ifig  through  its  pages.  For  Ihose  of  you  not  acquainted  with  this  firm, 
Dover  is  a  company  specializing  in  all  types  of  quality  paperback  re- 
prtnls  priced  from  about  one  to  five  bucks.  Wilhin  the  pages  of  their 
catalogue,  you  cao  find  books  on  subjects  ranging  from  dying  cloth 
with  crushed  insects,  to  the  complete  engravings  of  Albrecht  Durer. 
They  also  have  a  selection  of  old-fashioned  postcards  that  can  be 
made  into  fantastic  QSLs. 

At  any  rate,  I'm  plowmg  my  way  through  this  catalog  and  what 
should  I  see  listed  but  a  book  by  Hiram  Percy  Maxim.  Yes,  the  Hiram 
Percy  Maxim.  As  I  mentioned  m  a  column  back  in  1980,  among 
HPM*s  many  accomplishments  was  an  autobiography  entitled  A  Ge- 
nius  in  the  Famtfy  (later  made  into  the  1946  movie  So  Goes  My  Love, 
starring  Don  Ameche  and  Myrna  Loy>.  Well,  W  seems  that  Dover  has 
dusted  off  this  mighty  tome  and  is  offering  it  to  an  anxious  public  for 
the  tantalizing  sum  of  $150. 

If  you're  interested  in  ordering  a  copy  (and  should  any  real  ham  be 
without  one?),  you'll  find  H  on  page  52  of  the  1981-82  catalogue  listed 
between  The  Handbook  of  Pictoraf  Symtols  and  ObedteacB  Train- 
ing For  Your  Dog.  To  order,  write  to  Dover  Publications.  180  Varick 
Street  (slightly  south  of  the  FCC),  New  York  NY  100 1 4,  and  ask  for 
tKMDk  2094&'2.  Be  sure  to  add  70c  for  handimg.  I  can  hardly  watt  to 
see  the  faces  on  the  people  at  Dover  when  they  suddenly  get  a  few 
hundred  requests  for  a  book  by  Hiram  Percy  Maxim. 

Last  January's  logic  puzzle  in  the  Reader's  Corner  seems  to  have 
struck  a  responsive  chord,  in  fact,  since  the  puzzle  appeared,  Tve  re- 
ceived over  two  dozen  tetters  askir\g  for  more  problems  devoted  to 
logic  and  reasoning.  Since  FUNl  always  aims  to  please  its  readers, 
this  month  we're  dedicating  the  entire  column  to  logic  games.  These 
puzzles  are  by  far  some  of  the  most  complex  riddles  ever  published 
in  FUN!,  so  be  sure  to  keep  a  glass  of  ice  water  or  some  other  suit- 
able refreshment  nearby.  We  don't  want  to  burn  out  any  brains. 


f  iect  to  hearing  an  altercation  followed  by  a  shot.  AHer  a  lengthy  trial, 
the  murderer  was  convicted,  sentenced  to  death,  and  hanged. 

•  Nat  knew  both  the  victim  and  the  murderer. 

•  !n  court,  the  judge  asked  Wall  to  give  his  account  of  the  shooting. 

•  Harvey  was  the  iast  of  the  six  to  see  Jimmy  alive. 

•  The  policemaf^  testified  that  he  picked  up  John  near  the  pface 
where  the  body  was  found. 

•  Bob  and  Harvey  never  met. 

What  role  did  each  ham  play  m  this  tragic  story? 


ELEMENT  3— DXCC  COUPLES 

Many  husbands  and  wives  are  avid  DXers.  One  afternoon,  Stan, 
Frank,  and  Joe,  along  with  their  wives,  whose  names  in  random  or- 
der are:  Susan,  Wilma,  ar\d  Diane,  got  together  to  compare  their 
DXCC  totals. 

•  Diane.  Witma,  Susan,  and  Frank  have  206,  202,  200,  and  194  coun- 
tries respeciiveiy. 

•  Stan  and  Joe  have  198  and  196  countries,  but  for  some  time  they 
couldn't  tell  who  had  made  which  since  they  both  had  tiad  memories 
and  lost  their  copy  of  OS 7. 

•  When  the  fellows  finally  found  the  QST,  it  turned  out  that  two  of 
the  couples  had  the  same  total 

•  Frank's  vyife  has  more  countries  than  Stan's  wife. 

What  is  the  name  of  each  man 's  wife,  and  how  many  countries  do 
Stan  and  Joe  have  confirmed? 


ELEMENT  4— CENSORED  MULT! PLICATION 

The  following  example  of  multiplication  has  been  attacked  by  the 
"Malh  Censor."  He's  taken  most  of  the  digits  in  this  problem  and  re- 
placed them  with  x's,  it  s  up  to  you  to  restore  the  problem  to  its  cor- 
rect form.  (Note:  The  4s,  5s,  and  6s  remaining  are  not  necessarily  the 
only  digits  of  those  values  in  the  example.) 

€>  X  X 
XXX 


XXX 
X  XXH 

X  6x  5 
X  X  5x4  X 


Uncensor  those  digits. 


ELEMENT  1— THE  REPEATER  COUNCIL 

The  Northern  South  Dakota  Repeater  Council  has  a  highly  in- 
volved  system  of  repeater  group  representation.  According  lo  the 
rules  of  the  council,  each  repeater  is  represented  by  four  members, 
but  because  of  overtappmg  repeater  ciub  memberships  the  follow- 
ing complications  exist: 

•  Each  person  on  the  council  is  simultaneously  the  representative 
of  two  different  repeater  groups. 

•  Every  pair  of  repeater  clubs  has  one  representative  In  common. 

In  this  maze  of  conflicting  allegiances,  the  NSDRC  accomplishes 
little  In  the  way  of  frequency  coordination,  which  isn't  unusual  for  a 
group  of  this  sort.  Nevertheless,  the  councirs  ofganizetion  presents 
an  Interesting  puzzfe^  which  is;  How  many  repeater  clubs  &re  repre- 
sented on  the  NSDRC  and  what  are  the  total  number  of  representa- 
tives? 


ELEMENT  S— THE  ORGANIZATION 

Six  hams:  John.  Mary.  CarL  Stan,  Harry,  and  Dick,  are  the  only 
people  interested  in  running  for  the  offices  of  president,  first  vice 
president,  and  general  manager  of  a  certain  national  organization. 

•  John  won't  be  an  officer  unless  Harry  is  presidenL 

•  Mary  won't  serve  if  she  outranks  Carl. 

•  Mary  won't  serve  with  Dick  under  any  conditions. 

•  Carl  won1  serve  with  both  Harry  and  Dick. 

•  Carl  won't  serve  if  Dick  Is  president  or  Mary  is  general  manager. 

•  Stan  won't  serve  with  Carl  or  Harry  unless  he  outranks  them. 

•  Harry  won't  be  first  vice  president. 

•  Harry  won't  be  general  manager  if  Stan  is  an  officer. 

•  Harry  won't  serve  with  John  unless  Dick  serves  too. 

•  Dick  won't  serve  unless  either  he  or  Carl  is  president. 

How  can  the  three  offices  be  fitted? 


ELEMENT  2-THE  JAMMER 

A  recent  murder  case  involved  the  homicide  of  an  alleged  repeater 
jammer.  In  one  order  or  another,  six  hams.  Wait.  Jimmy.  John,  Bob. 
Nat,  and  Harvey,  were  the  victim,  the  murderer,  the  witness,  the  po- 
liceman,  the  judge,  and  the  hangman.  Here  are  the  facts  of  the  case: 
The  victim  had  died  instantly  from  the  effect  of  a  close-range  gun- 
shot wound.  The  witness  did  not  see  the  crime  committed,  but  testl- 

96     JSMagazine  •  June,  1982 


THE  ANSWERS 

Element  1: 

There  are  ten  persons  representing  five  repeater  groups. 

Element  2: 

Walt  was  the  policeman,  Jimmy  the  murderer,  John  the  witness,  Bob 

the  victim,  Nat  the  judge,  and  Harvey  the  hangman. 


Element  3: 

Slan  is  married  to  Diane,  Frank  is  marffed  to  Wilma,  and  Joe  is  wed 

to  Susan.  Stan  has  198  countrtes  and  Joe  196. 

EtBment  4: 

645 
721 

6  4  5 
1290 
451  5 

4  6  5  0  4  5 
Efemenf  5: 

Carl  is  the  president.  Mary  the  first  vice  president,  and  Harry  the  gen- 
eral manager. 


Element  1: 
Twenty  points. 

Element  2: 
Twenty  points. 


SCORING 


Efement  3: 

Twenty  points. 

Efement  4: 
Twenty  points. 
Element  5: 
Twenty  pomts. 

Let's  get  logical. 


1-20  points 

21-40  points- 

41-60  points- 

61-80  points 

81-100  points- 


Scatterbfain. 
Utterly  confused. 
Room  tempefature  IQ. 
Computer  like. 
Mr.  Spock. 


The  following  amateurs  were  mtsslng  from  last  month^s  fist  of 
those  solving  January's  Reader's  Corner.  Found  1  solution: 
Ed  Larose  KS5V,  John  Hufschmid  KI9J,  Bob  Kendall  VE4ZH,  and 
Marien  Kendall  XYL-VE4ZH, 


Chod  Hams  VP2ML 

Box  4881 

Santa  Rosa  CA  95402 


COMBATTING  THE  SUMMER 
DOLDRUMS 

Doldrums.  A  state  of  inactivi- 
ty.  stagnation,  or  slump;  a  spell 
of  listlessness.  What  the  bands 
do  in  the  summer  The  pits. 
What  do  the  enthusiasts  of  the 
vaTious  bands  do  during  the 
summer  doldrums? 

The  high  level  of  atmospheric 
noise  (QRN)  ruins  the  lower  fre- 
quencies for  most  DX.  The 
I60*meter  specialist  discon- 
nects the  rig  and  spends  the 
summer  nights  sleeping,  dream^ 
ing  of  living  on  a  mountain  of 
copper  plate.  His  days  are  filled 
designing  the  perfect  ground 
and  wondering  it  his  neighbors 


will  notice  those  copper  wires  in 
their  swimming  pools. 

The  SO  meter  enthusiast 
splits  hfs  time  between  repair^ 
ing  winter^damaged  wire  anten- 
nas and  checking  the  noisy  sun- 
rise and  sunset  openings  for 
some  other  masochistic  DXer, 
The  pickings  on  the  band  are 
poor.  There  are  too  many  leaves 
on  the  trees  to  shoot  the  arrow 
through  the  branches  and  haul 
the  antenna  up  anyway.  Maybe 
there's  a  baseball  game  on  the 
tube. 

The  40^meter  DXer  paces  off 
his  imaginary  Selement  monch 
bander  in  the  back  yard  for  the 
fifteenth  time.  No  matter  where 


s^ 


he  places  the  tower,  the  ele- 
ments will  hang  over  his  neigh- 
bor's  yard.  That  neighbor,  of 
course.  .  .is  the  one  who  has 
never  been  vety  friendly  since 
that  incident  with  the  TV  set.  It 
looks  like  another  season  with 
the  inverted  vee.  Maybe  a  reflec- 
tor element  hung  between  that 
fight  post  and  the  fence. ,  . 

Twenty  meters  stays  open,  af- 
ter a  fashion,  all  summer.  The 
high  absorption  and  occasional- 


ly high  noise  level  combine  with 
amateurs  pushed  down  from  the 
higher  bands  so  conditions  are 
hectic.  But  it  is  possible  to  make 
contacts  outside  your  conti- 
nent. Antenna  work  can  wait  un* 
til  the  winter  proves  that  the 
beam  really  is  too  big  and  blows 
it  oven 

Fifteen  meters  flashes  with 
occasional  excitement;  it's 
probably  the  best  band  to  watch 
carefully  during  the  month.  The 


The  Catholic  church  overlooking  Mam  Street,  Easter  Island.  Anfen-       Father  Dave  Reddy,  O.F.M,,  CE0AE.  The  Chtfean  flag  has  flown  over 
nas  mark  CEQAE,  Father  Dave  for  years, 

TSMagazine  •  June,  1982     99 


J 


CEQAE  as  most  of  the  amateur  popufatton  sees  (hears?)  him.  Father 
Dave's  5BWAS  sits  above  the  fist  of  couniries  needed,  the  fatter 
always  at  hand. 


band  opeos  toward  the  sun  in 
the  morning,  often  very  rapidly. 
The  most  distant  stations  fade 
rapidly  as  the  MUF  climbs^  but 
the  shorter  path  DX  stays  stfong 
for  hours.  The  sunrise  and  sun- 
set hours  at  the  OX  location  re* 
main  the  best  bets. 

Ten  meters  suffers  badly  from 
the  summer  doldrums,  But  the 
changeable  ionosphere  does 
give  the  band  a  little  pizzazz 
once  in  a  whtle.  15  meters  pro* 
vides  a  good  predictor  of 
IOmeter  band  openings.  As  IS 
meters  shortens  up  (the  more 
distant  stations  lose  signal 
strength,  the  closer  stations  im- 
prove), 10  might  be  opening  in 
that  direction.  A  rapid  shorten- 
ing of  15  suggests  tuning  to  10 
and  trying  a  few  CQs.  The  first 
few  stations  on  the  newly  open- 
ing band  get  the  best  DX. 

Six-meter  fans  are  finding  F2 
propagation  scarce,  but  the  af^ 
ways-exciting  E^skip  keeps  the 
summer  interesting.  Solar  flares 
liven  the  band  a  couple  of  limes 
during  the  summer,  but  the  real 
excitement  awaits  the  return  ot 
shorter  days. 

DX  activity  and  the  overall  lev- 
el of  effectiveness  of  the  bands 
do  indeed  drop  during  the  mid- 
dle of  the  summer.  The  increase 
in  solar  radiation  during  tfte 
tonger  days  increases  the  at)- 
sorptive  properties  of  the  iono- 
sphere much  more  than  the  re- 
fractive ones.  The  signals  aren't 
escaping  into  space  as  they  do 
when  the  maximum  usable  fre^ 
qoency  is  low.  Our  radio  waves 
are  t>eing  absorbed  by  the  same 
ionosphere  which  permits  long- 
distance communications  in  the 
first  place. 

But  a  few  bright  spots  shine 
through  the  murky  bands.  The 
dectining  sunspot  cycle  flashes 

100     73  Magazine  •  June,  1 932 


wfth  a  fickleness  which  stnkes 
terror  in  many  a  propagation 
forecaster.  A  sudden  solar  flare 
can  produce  the  most  incredible 
long-path  openings  one  night, 
and  drive  the  absorption  so  high 
the  next  day  that  you  can't  work 
across  the  block.  But  favorabte 
conditions  as  the  flare  just 
starts  make  up  for  the  crummy 
conditions  the  next  day  or  two. 

Take  advantage  of  these  tran- 
sient gifts  to  the  dedicated  DXer 
by  checking  the  bands  at  least 
twice  a  day.  f^onitor  WWV  on  a 
cotiple  of  different  frequencies, 
if  possible,  until  you  can  tell 
when  conditions  are  a  little 
strange,  a  little  wilder  than  nor- 
mal. Try  some  of  those  long- 
path  directions  and  times.  Most 
superb  band  conditions  pass 
unexploited  because  '^everyone 
knows  the  band  isn't  open 
then  I " 

Another  encouraging  aspect 
of  the  summer  doldrums  is  the 
occasional  cool  breeze  of  good 
conditfons.  The  level  of  absorp- 
tion varies  daily  and  frequently 
drops  low  enough  to  permit 
some  good  DXing.  Again,  daily 
or  twice  daily  monitoring  and 
occasional  transmitting  ensure 
catching  these  openings. 

But  during  these  months  of 
perfect  weather,  between  the 
occasional  flashes  of  real  ex- 
citement on  the  bands,  this  writ- 
er's attention  begins  to  wander. 
I  start  to  think  how  some  of  the 
South  American  amateurs  are 
contending  with  the  winter 
storms,  amateurs  such  as  our  73 
profile:  CEOAE. 

When  a  visitor  walks  slowfy 
up  the  wide,  dusty  main  street, 
he  looks  toward  the  church 
square,  drawing  attention  from 
the  crumbling  walls  and  rust- 


stained  roof  of  the  church  itself, 
But  what  Is  that  sticking  up 
above  the  root  of  the  church?  It 
looks  Uke. .  Jt  is!  A  multlband 
vertical,  with  radials  strung  out 
just  over  the  roof  line.  An  RG'58 
feed  line  runs  off  the  back  of  the 
church  and  crosses  over  a  long* 
neglected  garden  to  a  tiny 
house,  overrun  with  vines  and 
cats.  A  garden  gate  hangs  from 
a  strap  of  rubber  tire  under  a  col- 
lapsing grape  arbor.  The  person 
who  lives  here  has  interests 
other  than  gardening. 

Indeed,  a  telltale  crackle  from 
the  window  on  your  right  hints 
at  the  avocation  of  the  long-time 
resident:  That  snnooth  CW  radi- 
ates from  the  fist  of  Father  Dave 
CEQAE,  on  Easter  Island,  in  the 
Pacific. 

Father  Oave  Reddy,  O.F.M,, 
landed  on  this  remote  rock, 
thousands  of  miles  from  any 
other  inhabited  land,  on  the  rec- 
ommendation of  Father  Sebas* 
tian,  the  former  Catholic  priest 
of  Easter  Island.  Father  Sebas- 
tian, widely  recognized  as  the 
father  of  modern  archeology  on 
Easter  Island,  as  well  as  father 
of  his  flock,  interviewed  Father 
Dave  in  the  United  States  short- 
ly before  the  former's  death. 
Soon  thereafter,  Father  Dave 
embarked  on  the  fulfilfment  of  a 
longtime  dream;  operating  ham 
radio  from  the  South  Pacific.  He 
left  the  seminary  In  Buffalo, 
New  York,  where  he  had  been 
teaching,  for  Santiago,  Chile,  to 
learn  Spanish* 

His  arrival  fn  Chile  (the  coun- 
try which  controls  Easter  Island) 
was  untimely.  Leftist  leader  Al- 
llende  rode  to  power  on  the  back 
of  anti'American  slogans,  and 
Father  Dave  could  not  get  the 
necessary  permission  to  as- 
sume his  role  as  the  spiritual 
leader  of  Easter  Island. 

AUhoygh  the  journey  was  nei- 
ther short  nor  straight,  Father 
Dave  did  finally  arrive  on  Easter 
Island,  with  built-in  status  as 
one  of  the  leaders  of  the  tiny  is- 
land. His  predecessors  in  the 
rofe  of  Pastor  of  Isia  de  Pasqua 
helped  forge  a  nucleus  of 
"Who's  Who'^  on  Easter  Island 
along  with  the  Governor,  Mayor, 
and  heads  of  the  small  military 
units  on  the  island.  Father  Dave 
rapidly  forged  another  reputa- 
tion as  an  active  and  congenial 
amateur  radio  operator,  CEJ9AE, 

Today.  Father  Dave  wel- 
comes visitors  with  the  same 
friendly  cheer  so  well  known  to 
his   on-theair  contacts.   His 


hearty  laugh  and  ever-present 
smile  and  good  humor  provide  a 
welcome  touch  of  the  States  in 
this  remote  corner  of  the  world. 
His  Long  Island  twang,  which 
strongly  colors  his  Spanish,  be- 
trays his  New  York  heritage.  The 
visitor  suspects  he  welcomes 
the  chance  to  speak  English 
other  than  "59  100/' 

It  ^s  hard  to  say  which  of  the 
Items  I  brought  from  the  United 
States  Father  Dave  most  appre- 
ciated: the  spark  plugs  and  re- 
placement gearshift  knob  for  his 
jeep,  the  diodes  to  repair  a  sel- 
dom-used  Collins  30L1  ampli- 
fier, or  the  two  big  jars  of  chunky 
peanut  butter.  I  suspect  the  last. 
The  food  on  Easter  Island  is 
monotonous  and  expensive, 
and  the  passing  of  the  plate  at 
the  Sunday  service  permits  few 
luxuries. 

The  presence  of  amateur  ra- 
dio visitors  promised  another 
bright  spot  In  the  slow  tifa  on 
Easter  Island.  Father  Dave  wel- 
comed the  assistance  of  the  vis- 
iting amateurs  in  improving  his 
antenna  farm,  heavily  damaged 
by  the  storms  which  sweep  in 
from  the  northwest.  Spare  parts 
and  tower-climbing  ability  are 
scarce  in  Easter  Island,  but  the 
generosity  of  his  amateur  visi- 
tors and  a  little  help  from  some 
passersby  left  CEOAE  with  a 
credible  set  of  skyhooks. 

Father  Dave  divides  his  time 
on  the  Isia  de  Pasqua  between 
his  church,  DXing,  and  his  Boy 
Scout  troop,  one  of  two  on  Eas- 
ter Island.  On  Chile's  Constitu- 
tion Day,  he  organized  the 
Scouts  into  the  parade,  then 
raced  to  join  the  other  island  au- 
thorities in  the  viewing  stand. 
The  Scouts  themselves  quickly 
joined  the  viewers  at  the  side  of 
the  parade  route  as  soon  as  they 
passed  the  viewing  stand  There 
simply  aren't  enough  people  on 
the  entire  island  to  both  have  a 
parade  and  have  people  watch- 
ing It,  Everyone  serves  double 
duty. 

A  good  time  to  work  CEOAE  is 
during  a  contest.  He  lets  few 
pass  without  at  least  a  few  con* 
tacts.  He  claims  a  faissez  faire 
attitude  toward  amateur  radio 
contests,  but  his  actions  sug- 
gest a  more  positive  attitude  to- 
ward their  periodic  madness. 
When  his  10-meter  signal  ap- 
peared to  be  interfering  with  the 
public  address  system  in  his 
neighboring  church.  Father 
Dave  would  hear  none  of  any 
suggestion  that  the  visiting  am- 
ateur  curtail  operations  during 


the  Synday  servfce.  ^'Nonsense! 
You  go  right  ahead  and  operate. 
111  turn  off  the  church  mike  and 
talk  louder/'  And  he  did! 

While  Father  Dave  often  can 
be  found  in  contests,  he  adn^its 
he  prefers  DXing  to  contesting. 
Easter  Island  Jies  south  of  the 
tropics,  and  the  band  coridilions 
are  not  as  uniformly  superb  as  In 
the  West  Indies  or  other  more 
northerly  islands  in  the  Pacific. 
So  band  opentngs  to  the  heavy 
amateur  concentrations  In  the 
Northern  Hemisphere  are  short- 
er and  not  as  strong  as  those  en- 
joyed by  his  competition  in  the 
tropics.  And  the  absolute  lack  of 
any  local  contacts  makes  seri- 
oys  contesting  difficult.  Easter 
Island  is  no  place  to  go  to  win  an 
amateur  radio  contest,  despite 
the  extra  20  dB  the  CEO  callsign 
Imparts. 

"Besides/"  Father  Dave  re- 
minds his  visitors,  "Sunday  is 
my  busiest  day." 

Father  Dave  shows  some  of 
the  signs  of  the  hard-core  DXer: 
His  greatest  fear  Is  that  he  won't 
get  on  the  Honor  Roll  before 
Easter  Island  Foses  its  status  as 
a  separate  country, 

Easter  tsland  no  longer  a  sep- 
arate country  for  DXCC?  Father 
Dave  explains,  "Continental 
drift  is  sweeping  Easter  Island 
toward  mainland  CMe  at  Ihe 
rate  of  2  inches  per  year.  We'll 


be  withfn  22S  miles  of  Chile  and 
lose  our  status  as  a  separate 
country  inonly  70  million  years,  I 
hope  I  can  work  the  last  47  coun- 
tries I  need  before  then/' 

How  can  you  increase  your 
chances  of  working  Father  Dave 
next  time  he  shows  up  on  15  me- 
ters? Maybe  you  should  review 
the  phonetics  for  your  callstgn. 

CHOOSING  YOUR  PHONETICS 

(This  part  of  the  column  Is  for 
phone  operators  only;  we'll  get 
to  the  CW  crowd  in  another  col- 
umn.) Proper  choice  of  phonet- 
ics can  speil  the  difference  be^ 
tween  success  and  failure  in  OX 
pileups.  How  do  you  choose  the 
most  effective  phonetics  for 
your  calisign? 

Think  about  why  you  use  pho- 
netics: The  purpose  is  to  reduce 
ambiguity.  So  many  letters 
sound  the  same  in  the  English 
language:  b,  d,  e,  t,  p,  g,  c,  v,  z* 
Even  under  perfect  conditions, 
most  OX  stations  confuse  state- 
side calls.  In  the  confusion  of  a 
typical  phone  plleup,  these  let- 
ters are  impossible  to  tell  apart. 
So  you  turn  to  phonetics. 

You  want  the  DX  station  to 
recognize  (and  come  back  to) 
your  calisign,  and  hopefully  be- 
fore  he  comes  back  to  someone 
else's.  So  your  phonetic  callsign 
should  be  unique,  it  should  re^ 
duce  confusion,  and  it  should  be 


easy  to  copy  through  the  pileup. 
Does  your  phonetic  call  meet 
these  objectives? 

THE  CHOICES 

The  first  place  to  look  for  pho- 
netics is  the  standard  list  found 
in  any  amateur  radio  handbook 
or  training  manual  This  stan- 
dard list  is  remarkably  good,  but 
it  does  have  a  few  problems  for 
DXers.  One  example:  After  mak- 
ing thousands  of  contacts  as 
WAISQB1 1  would  like  to  person- 
ally  throttle  the  idiot  who  picked 
^^sierra*^  for  S.  Sierra  is  C.  1  still 
hear  sierra  and  write  C.  "Sugar" 
gets  through  as  well  as  sierra, 
without  Che  ambiguity. 

Short  phonetics  punch 
through  pileups  faster  than  long 
ones.  The  amateur  who  uses 
short,  punchy  phonetics  can  get 
his  call  in  twice  as  often  as  the 
ham  who  uses  longer  ones. 
Guess  who  works  more  DX? 
"Fox''  is  vastly  preferable  to 
"Florida.''  And  the  DX  station 
can  fall  asleep  or,  worse,  work 
someone  else,  while  I  struggle 
with  "^Washington  American 
One  Santiago  Quebec  Bolfvia 
Portable   Victoria   Portugal 

Which  brings  us  to  another 
possible  soy  fee  of  phonetics- 
place  names.  Place  names 
make  long  phonetics,   usually 


too  long  for  pileup  sHuations. 
But  they  can  be  used  to  good  ad- 
vantage in  poorer  conditions  or 
to  confirm  a  oallsiga  AU  place 
names  share  a  common  disad- 
vantage as  phonetics,  however. 
Upon  occasion  they  cause  more 
confusion  than  they  eliminatef 
Witness  my  callsign  above,  and 
the  DX  station  answers,  'The 
station  in  Bolivia,  stand  by.  The 
Portuguese  station,  go  aheadT' 

One  well  known  contester 
turned  this  problem  Into  an  ad- 
vantage. WA1KID  would  often 
break  through  pileups  with 
^'WAIKlDeJaware."  Ethical  DX- 
ers  frown  on  such  use  of  decep- 
tive phonetics,  however,  and 
you  will  quickly  find  this  prac- 
tice leads  to  more  harm  than 
good. 

A  final  hunting  ground  for 
possible  phonetics:  *'cute"  or 
catchy  phonetics.  Such  as 
Black  White  Yellow,  or  Whiskey 
One  No  Good.  Or  the  famous 
Cute  Enema  Seashore.  Topical 
phonetics  fait  into  this  same 
category.  When  the  race  horse 
Seattle  Slew  won  the  Triple 
Crown  of  racing,  K7SS  tried  Se- 
at  lie  Slew  for  phonetics. 

How  do  you  choose  the  best 
phonetic  from  this  assortment? 
We'll  examine  how  you  "fine- 
tune"  your  mdividual  phonetic 
for  your  voice  and  station  next 
month. 


LETTERS 


THE  t^ST  TRAGEDY 


J 


Shortly  after  the  article  *'The 
Father  of  FM"  (February,  1982) 
appeared,  I  thought  Td  look-see 
for  myself.  Perhaps  a  few  pic- 
tures would  be  In  order.  Sure 
would  be  nice  to  add  to  the  club 
history  (the  Major  Armstrong 
Memorial  Radio  Club,  Alpine, 
NJ,  on  the  site  of  the  tower  de- 
scribed In  his  later  experiments). 
Several  passes  were  made  to 
find  the  location,  and  at  last  t 
found  it  hiding  ingloriously  be- 
hind a  huge  apartment,  the  num- 
ber, 1032,  hidden  under  many 
coats  of  paint  and  hard  to  distirv 
guish. 

There  above  me  on  the  hill  to 
the  east  she  stood,  empty, 
burned,  and  blackened,  over- 
grown with  weeds  and  unattend- 
ed flora,  alone,  abandoned,  ut- 


terly destroyed.  Though  win- 
dows below  were  boarded,  the 
door  swung  freely  in  the  winter 
wind;  a  foreboding  feeling  crept 
over  me  as  I  entered. 

Local  youths,  it  appeared, 
had  added  thefr  mark  to  the  al- 
ready sickening  sight»  Fear- 
fully  I  entered,  as  one  would  an 
unknown  tomb,  feeling  the  evil 
of  such  a  deed.  Slowly,  I  climbed 
to  the  room  where  it  all  began, 
up  the  main  stairs  which,  under 
the  paint  removed  by  the  heat, 
showed  a  lovely  balustrade— 
the  kind  so  many  are  now  restor- 
ing back  to  the  way  they  used  to 
be. 

If  only  It  had  had  a  chance,  It 
too  could  have  been  restored  as 
have  been  the  homes  of  many  of 
America's  lesser  heros,  but  the 
shame  of  the  Bronx  has  reached 
a  few  miles  north  into  Yonkers. 


There  before  me  was  the 
room — the  one  with  the  three 
windows— where  it  began.  The 
sounds  of  those  words  rang  in 
my  head  and  lifted  up  into  the 
sky    above.    Open    into    the 


universe.  Another  tragedy  In  the 
tale  of  Major  Armstrong  unfold- 
ed before  me  and  you. 

And  so  the  last  tragedy  in  the 
life  of  Major  E.  H.  Armstrong 
passed  one  cold  December  16, 


1032  Warburton  Ave.,  Yonkers,  at  preserrt.  For  "then,**  see  p.  51  of 
the  February,  t9B2,  issue. 

73MagazmB  •  June,  1 982     tOI 


1981,  shortly  after  8:00  am,  car- 
ried by  the  heal  and  smohe  into 
eternity. 

God  bless  his  memory. 

Art  Bonto  W2ZYC 
New  Ml  I  ford  NJ 


The  Metropolitan  Communi- 
cations Network  Radio  Club  of 
the  greater  Washington  (DC) 
area  operated  a  repeater  on  six 
meters  (52.2M  MHe  in;  53.250 
MHz  out).  We  would  like  to  have 
repeater  clubs  operating  six 
meters  anywhere  along  the 
eastern  seaboard  contact  us  to 
establish  some  linkage  and  ex- 
change experiences.  The  six- 
meter  FM  net  meets  Saturday  at 
1900  hours  local  time.  We  also 
have  a  six-meter  AM  net  which 
meets  Sundays  at  0900  hours  lo- 
cal time  on  50.4  MH£.  Sunday  at 
1900  hours  local  time  we  have  a 
six-meter  sideband  net  which 
meets  on  50.125  MHz. 

Robert  Spom  WA3GG0 
Corresponding  Secretary 

9927  Cottrell  Ten^ace 
Silver  Spring  MD  20903 


U 


WRITE  FOR  RIGHT  HAMS 


As  a  regular  reader  of  your  ex< 

cellent  publioallon,  I  enjoy  read- 
ing your  often-controversial  edi- 
torial comments  and  the  letters 
page,  but  t  have  now  been 
forced  to  write  on  behalf  of  the 
large  number  of  amateurs  out- 
side the  US  without  whom  there 
would  be  no  DX.  it  seems  that  all 
your  comments  do  not  take  any 
account  of  the  very  important  in- 
ternational-contact part  of  our 
great  hobby.  Please  bear  in 
mind  that  you  are  no  more  a  rep- 
resentative of  the  radio  ama- 
teurs than  IS  the  editor  of  the 
Washington  Post  or  the  London 
Times  of  their  respective  reader* 
ships,  and  please  take  us  DX  op* 
erators  into  account, 

I  would  also  like  to  comment 
on  some  aspects  raised  In  your 
Issue  of  March,  1982.  Concern- 
ing your  promotion  of  a  no- 
Morse  license.  I  am  definitely 
against  this,  especially  as  we  In 
Britain  have  had  a  no-Morse 
VHF  license  for  some  years.  As  I 
operate  both  in  the  US  and  at 
home  on  both  the  VHF  and  HP 
bands^  f  have  noted  that  despite 
the  much  larger  number  of  US 
amateurs,  yog  have  a  much 
smaller  proportion  of  lids.  Have 
you  ever  listened  to  the  London 

102     73 Magazine  •  June,  1982 


repealers?  Also,  the  operating 
standards  of  US  amateurs  to  me 
are  much  higher  than  the  aver- 
age, especially  on  CW.  I  am  sure 
that  this  difference  ts  a  result  of 
youf  Novice  system,  that  i  woutd 
like  to  see  copied  in  the  UK. 

This  brings  me  to  my  next 
subject  of  emergency  communi- 
cations, although  nobody  can 
fault  your  suggestion  for  a  na- 
tional data  network  (internation- 
al?) for  traffic  handling- 1  believe 
that  once  main  power  supplies 
have  gone^  as  they  certamly  will 
in  a  conflict,  we  will  be  back  to 
CW.  I  believe  that  we  should 
propagate  some  return  to  basic, 
but  modern,  technology  in 
amateur  radio  coupled  with  GW 
operating  so  that  In  the  final 
emergency  we  amateurs  can 
salvage  some  communications 
from  the  remains. 

Andy  Hewitt  G3SVP/W4 
Thatcham,  Berkshire,  England 

t  can  see  you've  never  tried  our 
repeaters  in  New  York  or  Los  An- 
geles. I  monitor  the  London  re* 
pesters  when  I'm  there. ,  .no 
comparison  to  the  antics  we  are 
abfe  to  generate.  Andy,  where 
are  we  gotng  to  get  aii  those  CW 
rigs?  Most  of  the  SSB  and  fM 
ham  gear  these  days  can  oper- 
ate from  a  car  bBttery  as  we//  as 
the  mains.  A  farge  part  of  the 
emergency  gear  is  mobile  and 
hand-heid  equrpment  anyway,  / 
can  just  see  us  aii  sitting  there 
with  a  hand  key  sending  mes- 
sages via  our  handie-tatkies. 
Perhaps  some  forward-tooklng 
firm  wiii  come  out  with  a  hand- 
key  kit  to  provide  keys  which  wiii 
screw  on  to  our  NTs  in  case  of 
emergency  need.  We  could  even 
have  the  code  printed  on  it  for 
those  of  use  who  have  forgotten 
the  code, — Wayne. 


A  RtGHI  HAM  WRITES 


: 


1  think  that  you  ought  to  write 
a  couple  of  things  about  Nov- 
ices. I'm  12  years  old  and  Tm  a 
Novice,  I  see  a  lot  of  articles  on 
things  pertaining  to  General 
class  hams  but  nothing  about 
us  Novices.  Thanks  for  your 
time,  I  think  your  magazine  Is 
great* 

Eric  Farwell  EF2XJI 
Miami  FL 

Eric  F.,  you  are  atsofuteiy  righit 
Let's  see  some  more  articles  to 
help  our  Novices  understand 
more  of  what  is  going  on.  We 
need  to  get  them  interested  in 
simpie  antennas  and  how  they 


work,  introductions  to  some  of 
our  more  eKciting  activities 
such  as  traffic  handling,  BSTV, 
ATV,  R7TK  certificate  hunting, 
contests,  and  so  on. — Wayne. 


NO  MORSE  A  HO  KO 


] 


I  am  writing  in  disagreement 
with  your  feelings  about  CW.  Ev- 
idently you  don  I  operate  CW*  I 
operate  CW  and  enjoy  It.  I  am  14 
and  was  first  introduced  to  ham 
radio  when  I  was  11.1  was  at- 
tracted  to  ham  radio  because  of 
CW;  it  seemed  interesting.  I  was 
not  scared  off  by  CW  when  I  was 
a  newcomer,  I  work  lots  of  CW.  I 
do  also  work  SSB  and  enjoy  it, 
too.  CW  is  oof  (for  most)  just 
"the  usual  garbage  of  name,  lo- 
cation, signal  strength. .  .**  etc., 
as  you  stated  in  an  answer  to  a 
letter  in  the  April,  1982,  issue. 
Tm  a  ragchewer  and  do  mostly 
that,  though  I  do  some  DXing 
and  contesting,  t  don't  just  give 
my  name,  QTH,  etc.  I  taik  about 
my  family,  the  day,  school,  my 
future,  eiectronics,  etc.  CVV  is 
fun  and  rewarding.  CW  is  the 
root  of  ham  radio,  CW  is  what 
makes  ham  radio  special.  I  am 
compieteiy  against  "no-code" ^ 
itcenses;  the  last  thing  I  want  to 
hear  is  ham  radio  sounding  like 
the  Chicken  Band  (CB>.  So  my 
conclusion  is  that  CW  is  fun  and 
thoughts  are  expressed  on  CW, 

Eric  lasslter  KA4KEQ 

Danville  VA 


Hey,  Eric  /_.,  i*m  giad  you  We 
found  some  chaps  on  CW  who 
wiii  give  you  more  than  the  usuai 
duii  routine.  That's  great!  Not 
that  /  can  in  any  way  single  out 
CW  for  that  crime.  it*s  ati  too 
prevatent  on  our  repeaters,  and 
certaiafy  not  unknown  on  ourDX 
bands.  And  t  don't  know  of  any- 
one who  wants  to  have  our  ham 
bands  sounding  even  more  like 
CB  than  they  do,  so  stop  fretting 
about  that.  Perhaps  f  put  more 
trust  in  the  intettlgence  it  takes 
to  understand  radio  theory  than 
f  do  in  the  skiii  it  takes  to  copy 
code,  t  do  know  that  you  would 
be  hard  put  to  point  out  any  of 
the  more  serious  offenders  on 
our  bands  as  being  good  techni- 
cians^ I  tend  to  gravitate  more 
toward  hams  with  technicat 
backgrounds,  and  to  find  them 
the  most  sincere  and  fascinat- 
ing of  ail  hams^ — Wayne. 


[ 


HO  CODE  A  YES  YES 


Sir,  I  sincerely  applaud  you  for 
your  editorial  tn  the  March,  1982, 


73  Magazine.  I  find  your  logic  in 
a  no-code  ham  ticket  as  being 
beyond  reproach  and  agree 
whole-heartedly  with  your  comK 
ments.  Do  not  give  up  on  this,  as 
you  will  prevail* 

One  of  the  most  frustrating 
experiences  I  have  had  has  been 
wanting  to  get  a  ham  license 
and  to  do  experimentation  m 
communications.  As  a  result  of 
this  frustration,  I  turned  to  CB 
radio.  Most  everyone  knows 
there  is  a  problem  on  11  meters, 
but  fads  have  a  way  of  fading 
away,  leaving  only  those  that 
are  sincere.  The  only  drawbacks 
in  my  getting  into  ham  were  two 
items,  one  a  myth  and  the  other 
what  now  should  be  a  legend^  to 
wit:  you  had  to  spend  a  lot  of 
money  on  equipment,  and  code. 
As  has  been  evidenced,  you  can 
get  on  the  air  In  a  respectabfe 
manner  without  having  to  sell 
the  wife  and  kids. 

The  other  item,  code,  is  rhet- 
oric used  by  the  elitists  to  keep 
it  all  to  themselves* 

Selfish  and  unconcerned  as 
to  the  future  of  ham  radio:  '1  had 
to  do  it,  so  shouJd  you,"  atth 
tudes.  tf  we  were  to  use  the  logic 
many  hams  profess,  we'd  still 
t>e  in  knickers  until  manhood, 
women  would  not  t>e  able  to 
vote  (hmmm),  and  we  would 
have  legal  slaves.  Trying  to  keep 
code  as  a  requirement  is  analo- 
gous to  keeping  a  person  on  a 
respirator  who  has  suffered 
"brain  death/' 

I  cannot  for  the  life  of  me  find 
any  logic  in  the  license  require- 
ments for  code.  5  wpm,  Novice, 
CW  only;  Technician.  CW  and 
phone  on  some  VHF;  13  wpm  for 
General  and  Advanced  for, . . 
phone  privileges?  Like  putting 
the  cart  before  the  horse,  bass 
ackwards.  In  any  case,  code 
should  be  like  blacksmithing,  an 
art  of  an  outdated  requirement. 
Those  who  want  it,  do  it;  those 
who  don't,  won't.  Code,  like  sav> 
ing  string,  serves  no  useful  pur- 
pose but  you  keep  hanging  on  to  it. 

We  need  technical  innova- 
tions afid  experimentaljon  by 
those  who  sincerely  want  it 
while,  on  Ihe  other  hand^  provid- 
ing a  hobby  to  many.  I  am  trying 
to  get  our  local  Community  Col* 
lege  to  carry  a  non*credit  course 
In  the  aspects  of  ham  technol- 
ogy. So  far  no  luck,  but  I  will  con* 
tinue  to  try.  I  feel  that  we  as 
Americans  need  to  recapture 
the  reputation  for  being  leaders 
in  technological  advancements 
rather  than  aiso^fans.  To  do  this, 


we  must  take  down  our  selMm- 
posed  barriers  and  "motivate, 
not  frustrate"  (a  good  anti-code 
slogan)  new  blood  Into  tiam. 

I'll  learn  the  code  in  order  to 
upgrade,  but  I  will  then  drop  It 
like  a  bad  habft.  i  guess  that 
means  some  people  will  label 
me  as  a  lid  or  other  terms  they 
put  on  those  who  want  to  move 
forward,  not  stay  In  the  past.  If 
people  would  sit  down  and  un- 
©motionaliy  analyze  the  no-code 
proposals,  using  reality,  and  not 
negatrvely  speculate  on  what 
would  happen,  only  positive 
things  could  come  about.  For 
those  who  cannot  follow  the 
rules  and  regulations  as  set 
down,  what  we  need  Is  stronger 
enforcement  of  the  roles,  not 
outdated  requirements  such  as 
code. 

FCC  has  its  heart  and  hands 
full  in  light  of  the  budget  cuts, 
etc.  It  needs  help  in  enforce- 
ment of  the  rules.  This  could  be 
accomplished  by  the  use  of 
hams  themselves.  Testing  could 
be  done  on  a  local  level  by  a 
group  or  club  of  hams.  In  my 
case,  I  would  have  to  go  to  Long 
Beach,  California,  to  upgrade. 
This  would  cause  me  to  miss 
two  days  of  work.  Or,  glory  be.  I 
could  wait  to  sea  If  the  field  of- 
fice will  have  enough  money  to 
make  a  trip  maybe  2-3  times  a 
year  to  come  to  where  I  live* 

Using  local  hams  to  upgrade 
future  hams  would  also  Instill 
pride.  It  wouldn't  take  long  to 
find  out  which  groups  are  up- 
grading really  qualified  hams, 
as  the  proof  is  in  the  pudding. 
Nothing  wrong  in  taking  pride  in 
knowing  that  your  pupils  have 
been  properly  supervised, 
instructed,  and  motivated  in  the 
correct  methods  and  Nnowl- 
edge.  However,  the  clout  is  In 
the  hands  of  the  diehards  who 
Insist  on  being  outdated  In  put* 
ting  politjcal  pressures  on  those 
who  can  change  the  code  re- 
quirement. Until  these  "chosen" 
pass  away  to  that  great  shack  in 
the  sky,  I  am  afraid  that  the  code 
will  remam,  regrettably. 

There  are  so  many  positive 
aspects  to  dropping  the  code;  if 
only  those  who  wish  to  hold  on 
to  the  past  would  take  a  positive 
view.  Let*s  move  a^lead  and  be- 
come the  leaders  of  advance- 
ments, not  the  sleeping  giants 
that  we  are. 

Frank  J.  Ward  KA7LXT 
Tempe  AZ 

Tfoubfemaker — Wa  yne. 


HANG  HI  OV  YAQI 


Even  I  can  remember  the  time 
when  one  needed  a  yagi  or  a 
quad  to  work  DX,  the  thrill  of 
breaking  a  pileup,  the  sophisti- 
cation of  dual  vfo*s,  talKending, 
and  all  the  rest  of  that  good 
stuff.  To  the  new  breed  of  ham, 
this  sounds  like  weird  talk  in* 
deed,  The  new  DXer  thinks 
you're  out  of  the  band  when  he 
hears  about  stacking  flve*over^ 
five  on  a  180-foot  tower  Who 
needs  ft?  And  he's  right!  These 
tales  of  working  DX  with  yagis 
and  amplifiers  sound  like 
echoes  of  the  past,  like  the 
mumblings  of  bearded  Honor 
Rollers  about  the  gud  or  days. 
The  new  DXer  knows  where  it's 
af, ,  ,you  won't  find  him  staying 
up  half  the  night  in  the  hope  of 
catching  a  rare  one  while  the 
rest  of  the  world  sleeps.  He^s 
not  going  to  spend  hours  calling 
CQDX  in  the  hope  of  finding  a 
rare  bird,  Hefl  no,  he'll  tune  in  to 
a  DX  net,  of  which  there  are  now 
more  than  thirty.  He*ll  get  in  line 
and  work  the  rare  ones  without 
any  fuss.  **Llke  a  telephone 
call/'  says  one  list-taker.  "No 
cuss'n  and  scream 'n/' 

We  old  goats  have  been  taken 
In  by  the  manufacturers,  i.e.,  we 
were  told  It  was  necessary  to 
have  a  beam  and  an  amplifier  if 
one  wanted  to  be  a  successful 
DXer.  Well,  it  took  me  five  years 
to  discover  that  all  one  needs  to- 
day is  a  worry-free  dipoie  and  a 
barefoot  transceiver  and  you 
can  work  the  world, 

Like  an  archaeological  relic,  a 
dinosaur  crying  out  for  a  mate,  I 
called  CQDX  today  for  twenty 
minutes  on  15  meters  and  noth- 
ing came  back.  There  I  was  with 
a  fortune  tied  up  in  amplifiers 
and  towers,  yagis  at  150  feet, 
and  two-Inch  heiiax.  Nothing 
came  back,  so  I  spun  up  the 
band  and  there  they  were, 
twelve  of  them,  all  5  and  9,  and 
all  semi-rare:  D68,  ZD7,  EAS, 
EA9, 707, 3V8,  JW,  and  more,  all 
sitting  tike  clay  ducks  in  a 
shooting  gallery.  One  after 
another  they  came  back  to  the 
squeaky  off-frequency  signals 
with  4  and  3  reports.  (The 
callsigns  were  handed  out  by 
Ihe control  station  to  the  DX  sta- 
tion. Reason;  speed  and  effi- 
ciency, of  course,  of  course!) 
And  what's  more,  everybody 
was  happy.  The  gud  or  list 
takers  stood  by  for  the  indoor 
dipoles  and  verticals.  Only  one 
guy  failed  to  get  his  report,  and 


he  was  using  a  mag-mounted 
Hustler  whip  on  his  rig  in  the 
basement. .  .he  said  he  would 
wait  for  propagation.  (Gud 
man!) 

We  with  the  mite-liigh  yagis 
and  maximum-limit  amplifiers 
are  anachronisms,  incongrui- 
ties at  this  point  of  time.  Down 
will  come  those  relics  of  the 
past  and  up  will  go  the  trouble- 
free  dipote  Of  verticalt  and  out 
Witt  go  the  amplifier.  That  stuff 
belongs  with  chrome- laden, 
6-litrd  guzzler  automobiles  and 
25-cent-a-gallon  gas.  Get  with  It, 
DXers,  you're  showing  your  agel 
Plleups  are  on  their  way  out,  the 
way  individuality  is  out  and  or- 
ganization is  in*  CU  on  the  lists. 

Don  Ntwlandv  VE3HQN 
Cotborne,  Ontario,  Canadi 

You  ^oft*t  have  to  be  an  ofd* 
timer  to  remembBr  the  days 
when  men  were  men  and  the  en- 
dorsement sticker  belonged  to 
the  strong  and  the  quick.  But 
now  the  demand  for  DX  is  way 
ahead  of  supply.  A  DL  can  raise 
a  huge  lO-meter  piieup  on  a 
weekday  afternoon.  Rare  ones 
who  prefer  to  avoid  the  meiee 
turn  to  iists^  What  to  do?  Try 
contesting,  where  the  big  sta- 
tion is  worth  the  trouble.  There's 
still  a  place  for  your  8877s, 
Don.—  WBBBTH. 


IT  DOESN'T  COMPUTE 


] 


The  basic  reason  for  not  re- 
newing my  subscription  to  73 
Magazine  Is  because  I  feel  that 
Wayne  Green  Is  using  It  to  fur- 
ther the  use  of  computers  and 
associated  software  for  commu- 
nications between  hams.  This,  I 
feel,  reduces  the  human  touch 
involved  tn  everyday  hamming. 
Taking  away  the  personality  of 
the  ham  and  replacing  It  with 
machinery  will  Indeed  make 
everyone  bored  with  the  hobby. 
This  leads  to  reduced  growth, 
which  Is  the  opposite  of  that 
which  Wayne  Is  trying  to 
achieve. 

Wa  do  fiMd  growth  tn  our 
hamming  hobby.  This  will  not  be 
denied.  But  to  substitute  com- 
puters for  the  personal  touch  is 
not  going  to  hack  it.  Contesters, 
DX  hunters,  county  hunters,  and 
rag-chewers  thrive  on  the  per- 
sonal satisfaction  that  comas 
from  doing  it  themselves.  From 
learning  a  new  langauge — 
Morse  code^to  building  their 
own  pro|ects,  no  matter  how 
simple  or  complex,  each  and 


every  ham  has  his  goal  within 
sight  and  obtainable.  It  oniy  de- 
pends on  his  ability  and  determi* 
nation  to  do  so, 

Wayne  professes  that  Involve- 
ment with  computers  will  revolu- 
tionize the  hobby.  He  is  abso- 
lutely correct,  it  will  do  what  he 
wants.  It  will  have  hams  all  over 
the  world  making  contests  no 
more  complicated  than  picking 
up  the  phone  and  dtaling  across 
the  states.  If  that's  what  hams 
want,  then  why  are  they  spend- 
ing their  money  on  better  anten- 
nas, higher  towers,  new  radios, 
or  any  other  gadget  that  they 
think  will  make  their  contacts 
better  or  stronger  than  anyone 
else's?  Why  don't  they  spend  It 
on  computers  and  software  and 
take  all  the  grief  out  of  ham- 
ming? 

Computer  hamming  will  elimi- 
nate personal  satisfaction, 
which  Witt  in  turn  eliminate  the 
desire  to  be  an  amateur  radio 
operator 

Jim  Ory  WD9ATJ 

Plalnfleld  IL 

By  goffy,  Jfm,  you  are  probably 
right!  We  Just  may  be  able  to 
make  It  so  amateur  radio  can  te 
enioyed  by  people  who  haven't 
the  kllobucks  to  put  up  monster 
beams  and  run  10,000  Watts,  as 
you  seem  to  prefer  We  might 
even  be  able  to  cut  back  on 
those  fun  plleups  which  have 
chased  most  of  the  DX  opera- 
tors off  the  air  from  rare  coun- 
tries. But  just  maybe  the  nuts 
who  think  a  new  country  1$ 
worth  getting  kilted  for  can  be  si- 
phoned off  Into  ever  more  com- 
plex automatic  country  working, 
thus  leaving  the  bands  more 
open  for  getting  to  realty  know 
some  of  the  DX  operators.  You 
know,  the  FCC  was  opposed  to 
letting  computers  into  amateur 
radio,  too.  It  apparently  never 
occurred  to  them  that^  like  a 
typewriter  or  a  Teletype^  ma- 
chine, there  has  to  be  an  opera- 
tor. .  .a  live  person, ,  Mehind 
each  computer;  The  computer  Is 
just  another  means  of  conymunl- 
cating,  little  different  from  CW, 
RTTY,  and  so  on,  it  turned  out 
that  the  FCC  chaps  had  virtually 
no  understanding  of  the  situa- 
tion and  were  acting  normally 
. .  JIghting  any  efforts  by  hams 
to  experiment  and  perhaps  pro- 
vide the  world  with  some  prog- 
ress. Obviously t  Jim,  you've 
managed  to  arrive  at  your  con- 
mictions  without  taking  the  time 
to   ask   anyone   involved   with 

73 Magazine  *  JuneJ9d2     103 


computers  about  the  reaf  skin* 
ny.  Find  out  what  you  are  talking 
about  first. .  Jhen  think  it 
over  .  .then,  and  onty  then,  go 
on  record.  Remember^  Jim,  that 
when  t  write  something  t  know  / 
will  be  faced  with  about  200,000 
skeptics,  each  one  more  inter- 
ested in  biowing  a  hole  in  my 
reasoning  than  in  agreeing  with 
me,  ♦  .so  thaye  to  be  darned  sure 
t  have  the  background  to  know 
what  t  am  writing  about.  Jim,  I'm 
ready  to  stand  up  in  front  of  any 
assemblage  of  hams  and  dis- 
cuss Morse  code,  its  pros  and 
cons.  /Ve  been  at  that  for  some 
thirty  years  now, .  ,and,  as  t've 
said,  it  has  been  quite  a  few 
years  since  t've  heard  anything 
new.  Jim,  you  havenl  the  slight- 
est  idea  of  what  computers  may 
do  to  hamming  since  you 
haven't  tried  them, ,  .and  ap- 
parently don  t  know  anyone  who 
has.^Wayne, 


THE  GREAT  GRATER 

So  Wayne  the  Grate  (just  a 
smaH  pun)  has  again  taken  up 
the  Holy  Grail,  this  time  in  the 


form  of  abolishing  the  code  re* 
quirements  for  han^  licenses. 

I  admire  you  for  the  coy  rage 
of  your  convictions,  Wayne,  but 
there  are  more  than  a  few  of  us 
out  here  who  have  strong  objac* 
tJons  to  a  no-code  license,  my- 
self included. 

I  am  a  newer  ham  (since  1977), 
an  electronics  engineering  tech* 
nician,  own  my  own  personal 
computer,  and  am  an  active 
member  of  the  Tucson  Amateur 
Packet  Radio  Club.  1  only  say 
this  in  order  to  dispel  any  idea 
that  1  am  of  the  "fraternity"  that 
dislikes  the  introduction  of  new 
technology  into  ham  radro. 

When  I  recetved  my  ham  li- 
cense in  the  mail.  I  felt  some- 
thing that  Tm  sure  no  CBer  has 
feit  when  his  permit  arrived. 
That  feeling  is  a  sense  of  ac- 
complishment, I  earned  this  II- 
cense^  and  it  is  that  feeling  that 
binds  me  together  aiong  with 
the  majority  of  other  hams.  A 
"cut  above,*'  if  you  will.  The  day 
that  bond  is  gone  is  the  day  thai 
the  Amateur  Radio  Service 
ceases  to  exist.  Att  remaining 
motivating  factors  will  be  seff- 


centered,  and  no  longer  will 
hams  work  for  the  "good  of  am- 
ateur radio," 

But  that  is  not  why  I  write  this 
letter.  I  enjoy  your  magazine 
very  much,  Wayne,  but  a  couple 
of  things  disturb  me.  First  of  all, 
your  "Holy  Graif  editorials  tend 
a  bit  toward  ranting  and  raving. 
That  can't  be  good  for  the  blood 
pressure  or  the  digestion,  I  also 
have  noticed  that  your  replies  to 
the  letters  protesting  your  edito- 
rial views  are  usually  longer 
than  the  letters  themselves.  My 
psychologist  friend  has  some  in- 
teresting things  to  say  atiout 
that.  In  short,  take  it  easy. 
Wayne,  This  would  be  a  pretty 
dull  hobby  sometimes  tf  it  were 
not  for  cage-rattlers  like  you,  so 
try  to  rattle  softer,  so  that  you 
may  rattle  longer. 

Dsve  Bamhart  WB70BG 
Glendale  AZ 

Dave.  /  enioyed  your  tetter  But 
you  should  understand  that  no 
matter  how  much  the  cages  rat- 
tle, I'm  sitting  here  grinning.  My 
blood  pressure  is  fine.  -  J  give 
heart  attacks,  I  don*t  get  *em.  t*m 
happy  that  /  give  the  impression 


that  Vm  real  serious  about  ati 
this.  Oh,  i  do  think  that  it  is  high 
lime  to  dump  the  code  as  a 
means  of  keeping  enthusiasts 
out  of  the  hobby. .  .and  to  sup- 
piant  It  with  a  technical  exam 
which  can't  to  totafly  thwarted 
by  the  Bashes  and  other  cheat- 
ing systems,  if  you  read  the  li- 
cense study  manuals  t  put  out, 
you'll  see  what  t  think  is  best. . . 
simple  theory  explanations 
which  anyone  can  understand. 
Fortunately,  /  have  reason  and 
psychoiogy  on  my  side. .  .and 
fust  an  interest  in  getting  things 
improved,  not  an  overwhelming 
zeal  Zealots  are  not  open  to  aV- 
ternative  ideas  and  get  aft  emo- 
tionally involved  in  what  they 
are  doing.  On,  t  don't  expect 
Morse  code  to  get  dumped 
quickly. .  .perhaps  some  expert* 
ments  with  this  on  220  MHz,  as  t 
proposed  to  the  FCC  about  thir- 
teen years  ago,  to  see  if  we  can 
make  the  change  from  a  filter  of 
a  very  slight  skill  (code)  to  a  not- 
much-more-difficult  technical 
test. .  .without  the  universal 
cheating  via  Bash.  My  letter  an- 
swers are  long,  at  times,  so  I  can 
clarify  misconceptions.— Wayrie. 


comm 


Robert  Baker  WB2GFE 
15  Windsor  Dr. 
Atco  NJ  08004 

JEFFERSON  OAViS  DAY 

QSO  PARTY 

Contest  Period: 

1500  to  2400  GMT  June  5 

The  Pennyroyal  Amateur  Ra* 
dio  Society  is  offering  attractive 
certificates  for  contacts  made 
during  this  year's  ar\nual  event. 
Suggested  frequencies  are 
3730,  3940,  7260.  14310,  21410, 
and  28610.  Requests  for  certifi- 
cates or  more  information 
should  be  addressed  to  Penny- 
royal Amateur  Radio  Society, 
PO  Box  1077,  Hopkinsville  KY 
42240. 

WORLDWIDE  SOUTH 

AMERICA  CW  CONTEST 

Starts:  1500  GMT  June  12 

Ends:  1500  GMT  June  13 

Sponsored  by  Eiectronica 
Popular  magazine  of  Rio  de  Ja- 
neiro, Brazil,  this  contest  will  be 
held  annually  on   the  second 

104     73Magazine  *  June,  1982 


weekend  of  June.  Use  all  bands 
from  80  through  10  meters  on 
CW  only;  crossband  contacts 
are  not  valid.  Only  contacts  be- 
tween South  American  stations 
and  stations  on  other  conti- 
nents are  considered  tor  scor- 
ing. A  station  may  be  worked  on- 
ly once  on  each  band.  Entry 
classes  include  single  operator/ 
single  band  or  all  bands,  and 
multi-operator/single  transmit- 
ter (multiband  only). 

EXCHANGE: 

RST  and  consecutive  QSO 
number  starting  with  001. 

SCORING* 

Each  QSO  counts  2  points. 
Contacts  between  South  Ameri- 
can stations  count  only  as  muf- 
tipliers,  not  as  QSO  points.  For 
South  American  stations,  the 
multiplier  is  the  number  of  dff- 
ferent  countries  worked  on  each 
band.  For  others,  the  multiplier 
is  the  number  of  different  South 
American   prefixes   worked  on 


each  band.  The  final  score  is  the 

sum  of  QSO  points  multiplied  by 
the  sum  of  multipliers. 

AWARDS  &  BNTRIBS: 

Certificates  will  be  awarded 
to  the  three  top-scoring  stations 


fn  each  class  and  to  the  top 
scorer  in  each  country.  A  sepa- 
rate log  for  each  worked  band 
must  be  sent  no  later  than  July 
31st  to  WWSA  Manager.  PO  Box 
18003,  20772  Riode  Janeiro,  RJ. 
Brazil, 


JUHS 

LENMR 

JnHwiqn  Bmt\s  QSO  F^irl? 

JUN  12^13 

AftRL  VHP  OSO  Party 

JUN  12-13 

Worldwide  Scutti  Art«6rfc«  CW  ContHt 

JUN  19-20 

Summflsr  SMIRK  Rally 

JUN  2&zr 

ARPL  Field  Day 

JUL! 

CARF  Canada  Day  Contaaf 

JUL  10^11 

lAflU  fied^ospofl 

JUL  l7'Tft 

Intemntlonal  QRP  Contest 

JUL  iin 

'AS  M9ga£ine  Worldwlda  SSTV  DX  Contest 

JUL  24*2$ 

CW  County  HunterQ  Contaal 

AUG  r-8 

AFIRL  UHF  C^ntesl 

AUG  t4rtS 

European  DX  Contesl— CW 

AUG  21-22 

SARTQ  Worldwide  RTTY  Conlttt 

AUG  21-22 

M5  M9Q»iine  FSTV  UHF  Conleft 

SEP  11  12 

ARRL  VHF  OSO  Party 

SEP11'12 

EuTOpean  DX  Contest— Phone 

SEP  ia-20 

Wavhlngtoo  State  OSO  Party 

OCT  2-3 

CsllJ&mla  QSO  Party 

OCT  IfrtF 

ARCJ  ORP  CW  QSO  Party 

OCT  16-17 

Pennsytvania  QSO  Party 

NOV6>7 

ARRL  Swsepslakcrs— CW 

NOV  13-14 

EuiT>p«an  OX  Cocrtest— RTFY 

NOV  2(V21 

ARRL  S waapglalt  as — Pfwm 

DEC4-S 

ARRL  160-Mfltef  Con!a»t 

OEC  11-12 

ARRL  10-Meier  Conieat 

DEC  19 

CARF  Canada  Contact 

*  Nate  4«la  chinge^ 

RESULT 

72  MAGAZfNE 

s 

1 

40MtTER  SSB  CONTEST 

—Claimed  Scones— 

(Callsign.  QTH,  QSOs,  Toia«  Content  Scorn) 

W/VE  Single  Operator 

VF-iDX 

Sask. 

972 

113.240 

W9Re 

IN 

851 

105,148 

N3AMK 

PA 

771 

99,160 

KK9A 

IL 

856 

87.440 

KA1XM 

WA 

OX  Single  Operatof 

761 

63,358 

YUSANE 

Venezuela 

359 

65.880 

CN8G0 

Morocco 

361 

61,008 

H44SH 

Solomon  Is. 

291 

37,765 

LA5YF 

Norway 

221 

32.319 

JA2BAy 

W/VE  Mulli-Op«ralor 

205 

28,470 

N9IMB 

IN 

1098 

112.965 

KD4TQ 

KY 

972 

96,432 

VE22P 

Que. 

704 

86.355 

KJ9D 

IN 

6ei 

77^868 

N4BAA 

FL 

DX  Multi  Operator 

645 

66,392 

I4YNO 

Italv 

672 

128^800 

I5MPK 

Italy 

590 

107.334 

KJMETER  SSB  CONTEST 

—Claimed  Scoros- 

Wn/E  Single  Operator 

KQ2M 

NY 

510 

60,606 

;        N7DF 

UT 

700 

57,642 

KiCS 

MO 

552 

51,435 

WB2DHY 

NY 

34^ 

42,510 

VE5XK 

Sask. 

DX  Single  Operator 

672 

42,222 

CN8C0 

Morocco 

441 

67,032 

C6ADV 

Batiamas 

296 

21,488 

H18GBG 

Dom.  Rep. 

149 

17.052 

0K1MSM 

Ciech. 

165 

16,640 

HIBGB 

Dom.  Rep. 

W/VE  MyltlOpefator 

145 

14,484 

N9NC 

IN 

793 

57,652 

VF?ZP 

Que. 

567 

42,387 

N4BAA 

EL 

421 

36,480 

W4CN 

KY 

564 

35,441 

KF2X 

NY 

DX  Multl  Dfserator 

413 

25,488 

I5MPK 

Italy 

191 

22,184 

mm-fAETBn  COMBINED  CONTEST 

—Claimed  Scoftts— 

WA/E  Single  Operator 

N7DF 

UT 

1166 

180,040 

KC40V 

TN 

931 

147.686 

KSAKY 

Ml 

sao 

141.685 

W8ATR 

OH 

788 

104,967 

KC3JH 

OH 

DX  Single  Operator 

735 

100,250 

CNBCO 

Morocco 

802 

256,908 

H44SH 

Solomon  Is. 

aeo 

71,082 

JAIELY 

Japan 

196 

26,642 

VK5BW 

AuBtralJa 

170 

17,384 

DL8UI 

W.  Germany 

WnAE  Multi  Operator 

92 

8,544 

N48AA 

FL 

1066 

205,076 

KF2X 

NY 

DX  MuHI'Operator 

976 

161.604 

VF7ZP 

Que. 

1271 

249,996        1 

l5\flPK 

Italy 

781 

234J36 

QSL  OF  THE  MONTH:  W8VFT 

Sometimes,  the  design  of  a  QSL  card  can  capital  ize  on  the  unusu- 
al aspects  of  your  station.  It  worl^ed  for  W8VFT  and  his  wind-pow- 
ered setup.  In  fact,  as  the  back  of  the  card  explains,  WSVFT's  entire 
homestead  is  powered  by  the  wind  generator  shown  on  the  card! 

If  you  would  I  ike  to  enter  our  contest,  put  your  QSL  card  in  an  en- 
velope and  mail  it  along  with  your  choice  of  a  book  from  73's  Radio 
Bookshop  to  73  Magazine,  Pine  Street,  Peterborough  NH  03458.  At* 
tention:  QSL  of  the  IMonth.  Entries  which  do  not  use  an  envelope  (the 
Postal  Service  does  occasionally  damage  cards)  and  do  not  specify 
a  book  win  not  be  considered. 


SUMMER  SMIRK  PARTY 

CONTEST 

Starts:  0000  GMT  June  19 

Ends:  2400  GMT  June  20 

Sponsored  by  the  Six-Meter 
Internationaf  Radio  Klub 
(SMIRK).  No  crossband  con- 
tacts, multi  operators,  or  partial 
contacts.  Check  logs  or  dupe 
sheets  are  not  needed. 

EXCHANGE: 

SMIRK  number  and  ARRL 
section,  foreign  state^  province, 
prefecture,  or  country.  Count 
ARRL  sections  in  the  48  US 
states  only;  KH6  and  KL7  count 
as  countries.  Washington  DC 
counts  as  a  section  as  well. 


SCORING: 

Count  2  points  for  each 
SMIRK  contact,  1  point  for  non- 
SMIRK  QSOs.  Add  QSO  points 
and  multiply  by  number  of  ARRL 
sections^  foreign  states,  prov- 
inces, and  countries  worked  for 
final  score, 

AWARDS: 

Trophies  for  high-score 
SMIRK  in  two  divisions:  US/Can- 
ada and  foreign.  Certificates  for 
high  score  In  each  ARRL  section 
and  foreign  state,  province,  pre- 
fecture, or  country. 

ENTRiES: 

Entries  must  be  submitted  on 
TSMagazine  *  June,  1982     105 


RESULTS 

1981  CALIFORNIA  QSO  PARTY 

1 

Sponsored  by  the  Northern  CalHomia 

Contest  Qlub 

{Call,  CW  Qb,  SSB  Q&,  Mulllpler 

,  Score) 

- 

California  Single  Ops 

M6TR 

310 

2063 

m 

293,248 

N6BT 

325 

1998 

57 

283.347 

Neev 

282 

1488 

58 

221,676 

AI6V 

0 

1855 

m 

215.180 

K6HNZ 

0 

1659 

S7 

189,126 

KI60 

330 

972 

57 

167,238 

N6PE 

363 

882 

se 

159,600 

N60W 

270 

933 

m 

155,208 

AA6G 

41 

1227 

m 

146,889 

AA6RX 

@9 

1085 
CalHomla  MultlOps 

%7 

138,909 

AJ€0{M-Kl) 

15t 

1908 

57 

243,333 

N6AHA  (MS) 

105 

1298 

57 

165,927 

KSAA  (M-S) 

274 

455 

U 

93,528 

K6VA  fM-M) 

259 

400 

a3 

83,581 

KS6H  (MS) 

300 

34t 
Out  of  Slata 

60 

79,100 

WDOEWD 

168 

501 

54 

81,324 

WAOAVL 

171 

497 

52 

78,364 

N4BAA 

141 

312 

49 

51,303 

WA5DJK 

154 

249 

4S 

46,080 

WB5YXK 

176 

149 

45 

37,440 

W1GNR 

189 

in- 

44 

34,892 

K7GM 

156 

187 

41 

34,522 

W3HDH 

152 

166 

42 

33,096 

WA1FCN 

131 

149 

47 

32,477 

KD4XR 

P 

342 
DK  Top  Five 

4? 

32,148 

SM3DXG 

41 

1 

33 

4,125 

JA10P 

46 

0 

23 

3,174 

JR7TJP 

0 

53 

26 

2,756 

PY1NEZ 

g 

61 

20 

2,440 

LU6EF 

19 

24 

ai 

2,205 

the  fall,  1981,  edition  of  the  offi- 
cial SMIRK  log,  Singfe  copies 
are  available  for  an  SASE  and 
photocopies  may  be  used.  Send 


log  requests,  and  entries  post- 
marked by  July  11th,  to  Spencer 
F.  Ritchie  KA2MHT/5,  5122  Sag- 
annore,  San  Antonio  TX  78242. 


NEWSLETTER  CONTEST  WINNER 

After  a  three-month  hiatus,  I  was  called  upon  again  to 
choose  a  winner  for  73's  monthly  newsletter  contest.  As 
usual,  I  put  the  task  off  until  the  last  minute.  This  time,  I  was 
lucky;  a  'winner"  jumped  out  at  me.  If  you  have  an  opportu- 
nity to  read  this  month's  choice.  The  Log,  published  by  the 
Northern  Ohio  Amateur  Radio  Society,  you'll  see  why. 

The  NOARS  newsletter  is  not  a  one-man  show.  A  rather  im- 
pressive-looking  masthead  lists  25  names  of  officers,  editors, 
and  committee  chairmen.  The  theory  that  many  hands,  work- 
ing together,  make  for  a  light  load  applies  here.  The  Log's  first 
page  is  rounded  out  by  'Inside  This  Issue,''  a  series  of  vi- 
gnettes that  make  you  want  to  turn  the  page  and  start 
reading. 

NOARS  editors  KA8JRI  and  N8DN  A  make  sure  that  there  is 
something  for  everyone.  They  include  reports  for  award 
chasers,  the  contest  crowd,  DX  hounds,  traffic  handlerSj  and 
Novices.  An  historical  series,  "In  the  Beginning,"  will  appeal 
to  all  the  readers.  A  more  somber  Log  feature  is  the  '^Silent 
Key"  section,  which  incorporates  the  QSL  cards  of  deceased 
members  as  part  of  a  brief  memoriaL 

In  addition  to  their  monthly  newsletter,  NOARS  members 
receive  an  annual  membership  roster  and  a  calendar  that  has 
the  dates  for  club  activities  and  operating  events  clearly 
marked.  All  this  helps  to  convey  the  image  of  a  lively,  enthu- 
siastic club.— N8RK. 


AWARDS 


Bill  Gosney  KE7C 
Mfcro-80,  Inc. 
2665  North  Busby  Road 
Oak  Harbor  WA  93277 

CERTIFICATE  HUNTERS  CLUB 

All  awards  are  issued  to  both 
licensed  amateurs  and  SWLs 
on  a  heard  basis. 

Requests  for  band,  mode, 
and  power  endorsements  must 
be  made  at  the  time  of  your 
originai  application  and  must 
be  correctly  indicated  on  your 
log  extract. 

A  verified  log  should  be  sent 
in  lieu  of  QSLs.  Have  your  log 

106     73  Magazine  •  June,  1982 


certified  by  a  local  radio  club 
official,  two  licensed  ama- 
teurSt  or  a  notary  public. 
Copies  of  your  cards  will  be  ac- 
cepted in  lieu  of  certification. 

•  WTP— Work  The  Pacific.  The 
basic  award  is  issued  for  con- 
firmed contact  with  at  least  30 
countries  in  the  Pacific  area  as 
set  forth  by  the  WTP  country 
list,  Gold  seal:  A  gold  seal  is 
applied  when  50  or  more  confir- 
mations are  achieved-  Award 
application  fee  is  $3.50  or  12 
IRCs;  overseas,  add  $1.00  or  3 
IRCs;  gold  seal  after  original 
application,  $1.00  or  3  IRCs. 


•  WTO—Work  The  Caribbean. 
The  basic  award  is  issued  for 
confirmed  contact  with  at  least 
20  countries  In  the  Caribbean 
area  as  set  forth  by  the  WTC 
country  Ijst.  Gold  seal:  A  gold 
seal  is  applied  when  30  or  more 
confirmations  are  achieved. 
Award  application  fee  is  $3.50 
or  12  IRCs;  overseas,  add  $1.00 
or  3  IRCs;  gold  seal  after 
original  application  is  $1.00  or 
3  IRCs. 

•  Gold  Seal  Plaques.  If 
desired,  plaques  are  available 
for  the  WTP  and  WTC  award 
series.  When  requested  at  the 
time  of  original  application, 
yoof  award  is  mounted  on  a 
walnut-grain  13"  x  16"  plaque, 
for  $25.00,  (Overseas,  add  $7,50 
postage/insurance.)  When  re- 
quested after  your  original  ap- 
plicatton,  an  engraved  4x6 


solid  walnut  plaque  denoting 
your  accomplishment  is  avail- 
able for  $20.00.  {Overseas,  add 
$3.00  postage/insurance.) 

•  A-1  — Operator*s  Certificate 
of  Merit.  Issued  free  of  cost  by 
the  lARS/Certificate  Hunters 
Club  to  amateurs  observed  dis- 
playing a  high  level  of  achieve- 
ment in  various  areas  of  ama- 
teur  radio.  The  award  is  also 
issued  upon  receipt  of  three 
nominations  from  three  dif- 
ferent amateurs  in  three  differ- 
ent geographical  locations.  So, 
if  you  feel  that  an  amateur 
should  receive  this  honor,  get 
out  your  pen  and  give  us  the 
details  in  writing.  You  do  not 
have  to  be  a  member  of  the 
club  or  a  holder  of  the  award  to 
nominate. 

•  County  Awards.  Issued  in 
multiple  classes  for  the  differ- 


ent  numbers  of  count ies  con- 
firmed, m  14  states.  GCR  apply; 
fee  is  $3.50.  Tlie  awards  mea- 
sure 8V2  "  X  11 "  and  are  printed 
on  a  fine  parchtone  bond.  Other 
county  awards  will  be  made 
available  as  demand  requires. 

•  10  K  and  20  K  Awards.  Issued 
for  confirmed  contact  with  1 0  or 
20  ditferent  locations  outside 
the  United  States  operating  wrth 
a  W,  K,  or  N  prefix.  Award  fee  is 
$2.00  and  band  and  mode  en- 
dorsements are  available, 

•  Work  A- 1s,  Requires  appli- 
cant to  work  A'1  operator  certifi- 
cate holders  of  any  radio  organi- 
zations issued  for  WAG,  WAZ, 
WAS,  WPX  and  DX(CC),  All  rules 
are  the  same  as  they  are  for  the 
regular  award.  Award  fee  is 
$2.00  and  band  and  mode  en- 
dorsements are  aval  fable. 

For  applications  and  addi- 
tional information,  send  an 
SASE  to  the  CHC  Manager, 
Scott  Douglas  KB7SB,  PO  Box 
46032,  Los  Angeles  CA  90046. 


WORKED  ALL  VE 

Sponsored  by  the  Nortown 
Amateur  Radio  Club  of  Willow- 
dale,  Ontario,  the  WVE  Award 
requires  the  applicant  to  work 
two  different  stations  on  two  dif- 
ferent bands  in  the  eight  sec- 
tions, VE1  through  VE6.  Aft  con- 
tacts must  have  been  made 
from  an  area  within  a  radius  of 
150  miles  of  one  point  on  and  af- 
ter January  1,  1939. 

A  sworn  affidavit  and  certifi- 
cation by  a  local  radio  club  offi- 
cial must  accompany  your  applr- 
cation.  Also,  be  sure  to  send  all 
sixteen  QSL  cards,  two  from 
each  section,  along  with  $1.00 
and  sufficient  return  postage  for 
the  return  of  your  cards.  Ad- 
dress your  application  to  the 
Nortown  Amateur  Radio  Club, 
Box  146,  Station  A,  Wlllowdale, 
Ontario,  Canada  M2N  5S8. 

The  Nortown  organization 
also  sponsors  the  WACAN 
(Worked  All  Canada)  Award, 
Here  the  applicant  must  work 
two  different  stations  on  two  dif- 
ferent bands  in  each  of  the  fol- 
lowing twelve  areas:  VE1  (PEI), 
VE1  (NS),  VE2,  VE3,  VE4,  VE5, 
VE6,  VE7,  VY1  or  VE8,  V01,  and 
V02- 

All  contacts  must  have  been 
made  on  or  after  January  1, 
1949f  and  a  150-mile  rule  ap- 
plies, as  mentioned  for  the  WVE 
Award. 

Send  your  list  of  contacts  and 
QSL  cards,  with  $1,00  and  suffi- 
cient funds  for  the  return  of  your 


confirmatron  cards,  to  the  Nor- 
town ARC, 

TRANS  CANADA  AWARD 

The  Canadian  DX  Association 
writes  to  tell  us  about  their  very 
beautiful  award.  To  qualify,  you 
must  work  each  of  the  eight  VE 
call  areas,  with  five  contacts  In 
each  area.  In  addition  to  that, 
another  five  stations  must  be 
worked  in  V01  and/or  V02;  one 
VEO  maritime  mobile  station 
must  be  contacted.  One  of  the 
five  VE8  contacts  required  must 
be  from  the  Yukon  Territory  and 
one  must  be  from  one  of  the  off- 
shore islands  of  the  Northwest 
Territories.  In  short,  a  total  of  46 
contacts  must  be  made  to  meet 
the  minimum  requirements. 

WAG  2-80  AWARD 

Sponsored  by  the  Metro  Ama- 
teur Radio  Club  of  Downsview, 
Ontario,  the  Worked  All  Canada 
2-BO  Award  was  originated  in 
November,  1972.  All  contacts 
and  confirming  cards  must  be 
dated  on  or  after  that  date. 

To  qualify,  xhe  applicant  must 
submit  QSL  cards  to  verify  two- 
way  contact  with  one  station 
possessing  3  two-letter  call  In 
each  of  the  twelve  Canadian 
sections.  Are  you  wondering 
what  the  2-80  stands  for?  Well,  it 
means  all  contacts  must  be 
made  with  stations  onfy  with 
two-letter  calls,  and  these  con- 
tacts must  be  made  only  on  80 
meters.  Required  sections  in- 
clude V01,  V02,  VE1  (PEI),  VE1 
(NB),  VE1  (MS),  VE2,  VE3,  VE4, 
VE5,  VE6.  VE7,  and  VE8.  There 
are  no  mode  restrictions,  but  en- 
dorsements will  be  granted  at 
the  time  of  applications  if  all 
contacts  were  made  on  a  specif- 
ic mode  of  operation. 

Contacts  must  be  made  using 
your  own  equipment  from  one 
location  or  from  within  150  miles 
of  it  and  within  the  same  sec- 
tion. 

To  apply  for  this  award,  en- 
close $2.00  and  sufficient  post- 
age for  the  return  of  your  award 
and  the  required  confirmation 
cards.  Address  all  your  corre- 
spondence to  the  Metro  ARC, 
PO  Box  352,  Downsview,  Ontar- 
io, Canada  M3M  3A6. 

ALL  NOVA  SCOT*A  COUNTIES 

The  Nova  Scotia  Amateur  Ra- 
dio Association  is  proud  to  an- 
nounce the  WANS  Award,  which 
requires  the  applicant  to  work 
fifteen  of  the  eighteen  counties 
in  Nova  Scotia,  Canada,  or  four- 
teen of  the  eighteen  counties 


plus  a  contact  with  Sable  Island. 
There  is  no  charge  for  this 
award,  but  applicants  are  asked 
to  send  QSL  cards  and  log  data 
along  with  sufficient  postage 
for  their  safe  return.  Address 
your  application  to  Mrs.  Chris- 
tine Weeks  VE1 AKO,  PO  Box  47, 
Rural  Route  1,  Cleveland,  Nova 
Scotia,  Canada  BOE  1J0. 

The  Halifax  Amateur  Radio 
Club  also  sponsors  a  Worked  All 
Nova  Scotia  Counties  Award 
which  states  that  maritime  prov- 
inces must  contact  seventeen 
of  the  eighteen  counties  in  the 
province,  while  at  the  same  time 
they  must  contact  ten  counties 
on  a  second  band  or  series  of 
bands.  In  all  cases,  Sable  Island 
can  be  used  as  a  substitute. 

To  qualify,  all  contacts  must 
have  been  made  on  or  after  Jan- 
uary 1 , 1 977,  and  the  application 
should  be  sent  directly  to  the 
Halifax  ARC,  PO  Box  663,  Hali- 
fax, Nova  Scotia,  Canada  B3J 
2T3.  There  is  no  charge  for  this 
award,  but  the  appffcant  must 
supply  sufficient  postage  for 
the  safe  return  of  confirmation 
cards. 

DIPLOMA  OF  THE 
FRENCH  AMERICAS 

From  Quebec  City,  Canada, 
comes  word  about  the  French 
Americas  Award  which  requires 
stations  in  Europe,  Africa, 
North,  and  South  America  to 
work  at  least  two  FP8  stations, 
two  FY7  stations,  and  either  an 
FS7  or  FM7  station.  Applicants 
in  Asia  or  Oceania  must  work 
only  a  single  contact  from  the 
areas  of'FP8,  FY7,  and  FS7  or 
FM7. 

There  appear  to  be  no  date  re- 
strictions, and  applicants  may 
have  their  list  of  contacts  verl* 
tied  by  a  locaj  radio  club  official 
and  sent,  along  with  an  awards 
fee  of  $1.00  or  seven  (RCs,  to 
Alex  Desmeules  VE2AFC,  PO 
Box  382,  Quebec  City  4,  Canada, 

QUEBEC  CITY  AWARD 

Speaking  of  Quebec  City, 
Quebec,  the  local  amateur  radio 
fraternity  sponsors  the  Quebec 
City  Award  for  American  and 
Canadian  stations  which  make 
a  minimum  of  five  station  con- 
tacts in  Quebec  City. 

You  may  address  ail  corre- 
spondence to  the  Radio  Club  of 
Quebec,  PO  Box  332,  Upper 
Town,  Quebec  City,  Quebec, 
Canada.  The  award  fee  is  $1.00 
or  seven  IRCs, 


WORKED  ALL 
SASKATCHEWAN  PROVINCE 

The  Regina  Amateur  Radio 
Association  is  pleased  to  an- 
nounce the  WASP  Award  which 
requires  the  applicant  to  accu- 
mulate a  total  of  100  points  to 
qualify.  Members  of  the  Regina 
organization  count  10  points 
each  to  a  maximum  of  five  con- 
tacts made  with  members  of  the 
group*  Contacts  with  other  Regi- 
na amateurs  score  five  points, 
while  contacts  with  other  Sas- 
katchewan  amateurs  count  two 
points.  There  must  be  a  mini- 
mum of  ten  QSOs  made.  Send 
your  list  of  contacts  along  with 
your  confirmed  QSLs  and  $1.00 
to  RARA  Club  VE5NN,  2827  Ab- 
bott Road,  Regina,  Saskatche- 
wan, Canada  S4N  2J9. 

STONEHENGE  USA 

The  Tri-City  Amateur  Radio 
Club  wil  [  operate  a  special  event 
station  Saturday,  June  12, 1982, 
from  the  replica  of  Stonehenge 
located  near  Maryhiil,  Washing- 
ton. W7VPA  will  operate  from 
1600  to  0100  UTC  on  or  near  the 
frequencies  of  3.900,  14.290, 
21 .390, 28.690,  and  1 46.52.  An  at- 
tractive certificate  will  be 
awarded.  Send  QSL  info  and 
$1.00  to  W7VPA  Special  Event, 
PO  Box  73.  Richland  WA  99352. 

HOMEWORK  NET 

Are  you  a  teenager?  Or  still 
think  you  are?  Then  the  Home- 
work Net  is  for  you,  operating  on 
7.250  phone  every  Saturday 
from  2100  to  2200Z.  It  is  de- 
signed for,  but  not  limited  to, 
teenagers.  This  net  is  looking 
for  young  amateurs  who  wish  to 
make  new  contacts  with  people 
who  have  similar  interests.  So 
take  a  break  from  your  home- 
work and  join  us  on  our  informal 
Homework  Net— Diane  WD9DNQ 
and  Scott  KCONF. 

WATERLOO  DAYS 

The  N.  E.  Iowa  Radio  Amateur 
Association  will  operate  special 
event  station  WQJMG  in  conjunc- 
tion with  activities  celebrating 
My  Waterloo  Days,  on  June 
12-13.  Activity  will  take  place 
froni  Waterloo,  Iowa,  and  will  be 
on  7.240,  14.290,  ar^d  21-370. 
Special  informative  commemo- 
ratfve  QSL  card  for  SASE  to: 
NEIRAA,  PO  Box  92,  Waterloo  I A 
50704. 

DUNGEONS  AND  DRAGONS 

New!  A  10-meter  Dungeons 
and   Dragons   Net   at   28.720 

73MagazfnB  •  June,  1982     107 


±QRM.  Saturdays  promptly  al 
1500  GMT.  To  save  us  time  and 
grief,  please  be  ready  with  your 
charactef,  rank.  dice,  and  all  of 
the  necessary  info.  Net  control 
is  KA9J0X.  If  you  donl  hear  any* 
on©  at  28.720,  check  28.820.  If 
stilt  nothing  is  heard,  the  net  has 
been  canceled  because  of  poor 
turnout  or  other  reasons  and  will 
resume  the  next  week  at  the 
same  time  and  place.  If  you  wish 
to  participate  regularly,  please 
write  me  so  you  can  gel  a 
chance  to  be  a  DM  or  net  con- 
trol Address:  Michael  Frost 
KA9JOX,  Box  1008,  Riverside  IL 
60546. 


FORT  DELAWARE 

Fort  Delaware,  on  Pea  Patch 
Island,  Delaware,  will  be  the  site 
of  a  mini-expedition  by  Wilming- 
ton area  hams  on  the  weekend 
of  June  5  and  6, 1982. 

This  will  be  the  first  HF  ama- 
teur operation  from  the  fod  in 
the  middle  of  the  Delaware  River 
where,  during  the  Civil  War, 
many  thousands  of  Confederate 
prisoners  of  war  were  held.  The 
fort  is  now  a  state  park. 

Equipment  will  t>e  limited  to 
one  transceiver  fed  by  a  small 
generator  carried  to  the  istand 

by  a  small  boat.  Operations  wid 
be  in  the  General  segments  of 


the  HF  bands,  daylight  hours 
only,  with  each  operator  using 
his  own  call  and  the  Fort  Dela- 
ware identifier.  Members  of  the 
Independent  Amateur  Radio 
Group  of  Delaware  wilt  be  Rick 
KB3PD,  Allen  KB3HZ.  DwfQht 
N3ARU,  Ned  N3ARV.  and  Doug 
N3ACU.  Commemofatrve  QSL 
cards  will  be  issued  to  contacts 
supplying  SASEs. 

For  more  information,  con- 
tact the  Independent  Amateur 
Radio  Group  of  Delaware,  400 
Fifth  Ave.*  Miflcreek,  Wilming* 
ton  DE  19808, 

NOARS  AND  USS  COD 

Once  again,  signals  will  be  ra- 
diating  from  the  submarine  USS 
Cod.  Members  of  the  Northern 
Ohio  Amateur  Radio  Society  will 
be  operating  from  this  proud 
WWK  warship  during  the 
months  of  June,  Juty,  and  Au- 
gust, using  the  call  K8KRG. 
The  USS  Cod  is  on  permanent 
display  in  Cleveland,  Ohio.  Oper* 
ations  win  begin  on  Memorial 
Day  and  run  every  weekend 
(with  the  exception  of  Field  Day 
weekend)  until  Labor  Day. 

An  attractive  certificate  will 
be  awarded  for  two-way  con* 
tacts  from  the  ship  upon  receipt 
of  QSL  card  and  S.50  for  post- 
age. Look  for  operations  in  the 


lower  part  of  the  General  bands. 
10  through  80  meters,  on  the 
weekends  of  June  5-6.  July 
17-18,  and  August  7-8;  we  will  be 
operating  40'meter  Novice  band 
at  ?.  1 25.  Send  QSLs  to  Donald  L 
Winner  WD8RZG.  8927  Torrance 
Ave..  Brooklyn  OH  44144. 

NORFOLK  TRICENTENNIAL 

The  city  of  Norfolk,  Virginia, 
will  be  celebrating  its  tricenlen- 
nial  this  year.  As  part  of  the 
**Harborfest"  celebration  on 
June  11-14,  the  Tidewater  area 
amateur  clubs  will  join  together 
to  operate  a  Harborfest-Tricen- 
tennial  special  event  station. 
The  amateur  call  W4NV  wiil  be 
used,  and  special  QSL  cerfifi- 
cates  will  be  sent  to  all  contacts 
made  who  send  a  large  (8"x 
10 ")  SASE.  The  station  will  oper* 
ate  24  hours  each  day  in  the  80- 
through  2'meter  bands  and  will 
work  CW  and  SSB. 

For  further  information, 
please  contact  Bill  Verebely 
KC4YX,  3101  Petre  Road.  Chesa- 
peake VA  23325. 

LARGEST  TRAIN  ROBBERY 

The  Lit>ertyville  and  Munde- 
lein  Amateur  Radio  Society 
(LAMARS)  will  operate  W9HOG 
from  Rondout,  Illinois,  near  the 
site  of  the  largest  train  robbery 


in  United  States  history.  Approx^ 
Imately  three  million  dollars  in 
negotiable  instruments  and  jew- 
elry were  confiscated  during  a 
brief  stopover  and  all  partici- 
pants were  apprehended  within 
six  months.  Frequencies; 
phone— 7.260.  14.290.  21.375; 
CW— 7J25,  21.150.  Time:  from 
OOODZ  12  June  until  00002  13 
June.  Certificate  for  a  large 
SASE  to:  KB9BR  or  **Big  Rob- 
bery." Box  656,  Liberty vjlle  IL 
60048. 

STAR-SPANGLED  BANNER 
SPECIAL  EVENT  STATION 

WB3KUH  will  operate  a  spe- 
cial event  station  from  Fort  Mc- 
Henry,  Baltimore,  fylaryland— 
the  birthplace  of  The  Star-Span- 
gled  Banner — on  June  12  and 
13,  1982.  Operation  will  conv 
mence  at  1600  GMT.  Operation 
will  be  within  the  first  25  kHz  of 
(he  General  and  Advanced 
bands.  Both  SSB  and  CW  will  be 
used.  Novice  operation  is  also 
expected.  Operation  will  be  on 
20,  15,  40.  2,  and  6  meters. 

Stations  desiring  a  speciat 
certificate  from  the  event  sta- 
tion can  obtain  one  by  sending 
an  SASE  and  their  QSO  number 
to  Donald  Oakjones  WB3KUH, 
1806  Willann  Road,  Rosedale 
MD  21237. 


MM  HELP 


We  are  happy  to  provide  Ham 
Help  Ustings  free,  on  a  space- 

avaifabh  basis.  We  are  not  hap- 
py when  we  /rave  to  take  time 
away  from  other  duties  to  deci- 
pher  cryptic  notes  s  craw  fed  il* 
iegibly  on  dog-eared  post  cards 
and  odd-sized  scraps  of  paper. 
Pfease  type  or  print  (neattyJ), 
doubie  spaced,  your  request  on 
an$Vf**xt}  "sheet  of  paper  and 
use  upper-  and  lowercase  fetters 
where  appropriate^  Afso,  please 
make  a  "I"  fook  tike  a  "t"  not 
an  %  '*  which  couid  be  an  "et'*  or 
an  "eye,  **  and  so  on.  Hard  as  it 
may  be  to  belteve,  we  are  not  fa- 
miliar with  every  piece  of  equip- 
ment manufactured  on  Earth  tor 
the  last  50  years!  Thanks  for 
your  cooperation. 

I  am  interested  in  correspond- 
ing  with  hams  who  have  or  had 
any   late-model    Hallicrafters 

108     73  Magazine  •  June,  1382 


equipment,  specifically  the 
SR2000  Hurricane  transceiver. 
HA20  v1o.  and  P2000  power  sup- 
ply/speaker, \  am  interested  in 
operational  notes,  modifica- 
tions reviews,  and  comparisons. 

I  would  also  like  to  obtain  in* 

formation  on  the  history  of  Halli* 
crafters  eQuipment,  particularly 
post"  1956.  (I  already  have  a  copy 
of  the  Ham  Radio  article,  ''The 
HalNcraftersStory",) 

And  does  anyone  have  manu- 
als and  schematics  for  a  Heath- 
kit  fG-72  audio  generator  and 
AT^I  transmitter,  Hallicrafters 
S38E  receiver,  and  Eico's  1078 
ac  power  supply,  239  TVM,  and 
Model  315  signal  generator? 
Write  before  sending* 

Robert  Gagne 

143  Millvltte  St. 

Safem  NH  03079 


I  would  like  to  hear  from  any- 
one who  served  at  the  Navat  Ra- 
dio  Station  NSS,  Annapolis  hAD, 
from  1942  to  1946. 

Laurence  E.  Hoepfer  N7BJT 

Box  334 
Columbia  Falls  MT  59912 

I  need  a  schematic  for  a  Hick- 
ok  Model  t9XD  signal  generator. 

Sherman  Banks  N4CXF 

Rt  1  Youngs  Mill  Rd 

Kingston  GA  30145 

Has  anyone  interfaced  an 
Atari  400/SOO  to  a  rig  for  sending 
and  receiving  CW?  Is  software 
available? 

John  S.  Lee  KA4EPR 

12341  Dickinson  Or,  W303 

Coral  Gables  FL  33146 

I  am  in  need  of  information 
about    the   WWII    Navy    Model 
MBM  radio- 
Tony  Grogan  WA4MRR 
5  Rolllngwood  Dr. 
Taylors  SC  29687 

I  would  like  to  contact  anyone 
who  is  using  the  Texas  Instru- 


ments T1-99/4  home  computer  to 
send  and  receive  RTTY,  CW,  and 
SSTV. 

Miguel  BlnstokLUIDia 
PC  Box  012592 

Miami  FL  33101 

I  would  like  to  hear  from  own- 
ers of  the  code  reader  made  by 
Mlcrocraft.  I  need  data  on  how 
well  it  works.  QRM,  etc, 

Berand  G.  KIrschner  WBiYCQ 

1440  Grand  Ave.  #11 

St.  Paul  MN  55105 

I  would  like  to  *'marry"  my 
Johnson  Jnvader  200/2000  with  a 
receiver  that  has  a  5.0-5.5-MHz 
vfo  sothat  I  get  transceiver-type 
information.  Can  anyone  help? 

Arthur  Ford  W2HAE 

552  Hillside  Ct. 

Melbourne  FL  32935 

I  need  a  copy  of  the  sche- 
matic for  a  Hallicrafters  S407 
Mark  II  receiver,  built  approxi- 
mately 1961. 

Sheldon  Daitch  WA4MZ2 

Box  8091 
Greenville  NC  27834 


AES  Chmubl 


KLM  VHF/UHF 

POWER  AMPLIFIERS 

Facfory  Sediled,  Ule  model  units  with  One 
Vear  Warranty r  including  output  transistors. 

Iffodel  Band /Mode    li^       Out       ft«x     ^^^ 

PA2  25B        2m  FM  1  4w    25w    %  ^^''%  W 

MA-35BL       Zm  FM/SSB    l-4w    35w  129*^  99" 

PA4-80BI      2m  FM/SSB   l-4w    80w  229»''  169" 

PA4l60Bt    2m  FM/SSB   !-4w     160w  299*^  225" 

PAIO  9061    2m  FM/SSB   lOw      90w  199'^  149" 

PAIO'ITOBI  2m  FM/SSB   lOw      170w  299*''  225" 

PA15-40fli    2mFM/SSB  5I5w  40w  149*^  112" 

PA15  80flL    2mFM/SSB  5-15w  80w  179*^  135" 

PAIS  160BI  2m  FM/SSa  5I5w  i60w  269'^  199" 

PA45-160BI.  2m  FM/SSB   15  45   160w  239*^  179" 

HA  356CI     220  FM/SSB  l-4iw    35w  129*^  W* 

fA4'70eC      220  FM          1-4*    70*  329^''  172** 

PA15&0SC    220 FM         5^15*60*  199*^  H9" 

PAIS  120SC  220  fM         S15*  120w  299'*  225»* 

^15-120601  22t)  FM/SSB  5- I5w   120*  2W^  225" 

PA45-120&C  220FM          15-45    120**  279*^  2W* 

^A4^40CL      450  FW/SSB  l'4w    40w  279^  209l»* 

PA15-4flCi     450  FM/SSB  5-l5w  40*  199"  149*' 

PAlS-llOCl  450  FM/SSB  5-15**   UQm  349^  262** 

RECEPVIfftEAiPLIFIERS    (Regular Ur^)    NOW 

PRA-SOC  6m,  10dB,25dBNF UP^ 

PRA144[  2m  or  mtg.  m  oltf  style  KLM  amp 47"' 

PRA- 144(1  2m  fm  mtg  m  new  style  KLM  atpp    47*^ 

PRA'IWC  2m,  lOda.  aSdBN/F 47»^ 

PRA  220C  220  MHz.  15dB.„ .47** 

PftA-E70  432  MHi  for  Echo  70  {Reg.  $4^) .... 37** 


90-D^f  AES  Wiirrdiily 


TRAM  SWR/Wattmeter 

FuEly  automatic,  selLcahbrating  -  no  adjustments  to 
make  Dual  iltummated  meters  show  watts  out  factual 
SWR  simultaneously!  Range;  1,8-30  Whz  Poiwer:  0- 
20, 0  200  &  0  2000  watts.  Accyracy: +5S  Only  10^  of 
lull  scale  powtF  needed  to  read  SWR  warnmg  light  at 
3:1  Remote  sensor  fr/50^  cable.  ACatlaptgc  supplied. 
6  'T  &lls  f(K  battery  pawef.  7i4"w«  2^i"h  "  S^^d. 

Regular  $119^^  -  Closeout  $69^^ 

Clostout  Quantities  Limited  -  Don't  miss  oyt!  ~  Order 
direcl  from  this  3d.  Send  Checl.  Honey  Order  or  Call 
TOIL  FREE.  1-300-558^0411  and  use  MASTERCARD 
or  VISA.  Cish  payment  COD  orders  accepted  Prices 
do  not  include  shipping  chiiges. 


V/SA' 


® 


AMATEUR 

ELECTRONIC  SUPPLY 

4828  W.  Fond  du  Lac  Avenue 

Milwaukee,  Wisconsin  53216 

Phone:  (414)  442-4200 

Wisconsin  WATS:  1-800- 242 -5 195 

Nationwide  WATS:  1-800-558-0411 

AES  Brjnth  Store*  in:  Clearwatef.  FL  • 

Orlando,  FL  •  Wrckliffe.  OH  •  Las  Vegas.  NV 


I 


I 


Transmits  perfect  Morse  Code  *  Bullt-Jfi  16 
ctiaract*'^  buffer  *  tnternar  speaker  and  side- 
tone  *  Reed  relay  output  eliminates  keymg 
problems  ♦  All  solid  state  circuits  and  sockets 
for  fcliabiHty  •  Spaed  range  5^45  WPM  •  Perfect 
companion  to  our  CODE^STAR  all-mode  code 
reader. 
MORSE-A-KEYER  KiT*  modeJ  MAK-K,  Complete  kit  of  parts  &  manual  .  _  .  .     S159.9S 

WIORSE-A-KEYER,  model  MAK^F,  Factory  wired  &  tested ....,..,     $199.95 

M0RSE^A-KE:YER  essential  parts  kit,  nntodel  EPK^K.  ,.....,...,.  $  69.95 
(Essential  parts  kit  for  home-brewers  consists  of  pc  board,  board  parts  and  manual. 
You    supply    ASCII     keyboard,      cabinet,    power    suppty    &    mjsceJIaneous    parts^} 

Send    check   or   money   order^    Use  your  VISA  or  MasterCard,   Add   $5^00  shipping  and 
handling   for   Continental    U.S.   Wisconsin    residents   add   4%  Wisconsin   State  Sales  Tax. 


THunocia^ 


Corporation  Telephone:  (414}  241  8144 

Post  Office  Box  513G,  Thiensville.  Wisconsin  53092^50 


i 


I  The  Missing  Link 


The  Interface" 

suggested  price  $189.95 


Kantronics,  the  Innovator  in  code  readers  and  rtty 
terminals,  leads  the  pack  again  with  The  interface.^"* 

Your  personal  computer  becomes  a  complete  Cw  and 
RTTY  terminal  with  The  interface*"*  linking  It  to  your 
transceiver. 

The  interface™  receives  any  shift  of  rtty.  ASCII,  or 
cw  and  transmits  all  the  necessary  AFSK  tones  for  rtty, 
ASCII,  and  rtty  CW-ID.  The  manual  includes  a  complete 
software  example  for  the  Apple  ii  Plus,  featuring  split 
screen  display,  buffered  keyboard,  status  display,  and 
much  more.  Software  is  also  available  on  diskette  for 
Apple  and  cartridge  for  Atari. 

Follow  the  leader,  Kantronics,  into  the  computer  age 
of  amateur  radio,  see  The  interf  ace^'"  at  your  authoriz- 
ed Kantronics  dealer,  or  contact 


?  Kantronics 


»^Se«  Uvr  pf  4c^e/t/sers  en  ^q^  ff4 


(913)  842-7745    1202  E.  23rd  Lawrence,  Kansas  66044 


73  Magazine  •  June.  1982     109 


^O^le  (^meet 


MARK 


oun 


Bina  (^ 


3CR 


A  Stradivarius  is  more  than  a  body,  neck,  and  strings.  The  name  alone  says  it  is  an  instrument  of  out- 
standing quality  and  boautiful  sound. 

In  repeaters  the  name  for  optimum  perfDitnance  and  clean,  natural  sound  is  Mark  3CR.  And  Mark  3CR 
afso  means: 

•  Receiver  sensitivity  <0,25uV,  •  Spurious  rejection  >  65  dB. 

•  Schmitt  trigger  squelch  to  capture  fading  signals      •  Autopatch  and  reverse  autopatch 

•  13  Morse  messages  •  15  Function  controlled  outputs 

•  Die  cast  aluminum  receiver  and  transmitter  enclosures 

For  the  Finest  in 

Repeaters  •  Controllers  •  Power  Amplifiers  •  Link  Transceivers 


MICRO  CONTROL  SPECIALTIES 


^49 


23  Elm  Park.  Groveiand,  MA  01834     (617}  372-3442 


110     73MBgazinB  •  June.  1962 


FOR  THE  NOVICE 


*,« 


HOVICE 


¥>  V    •'■■•""^ 


■^J.      =+/.-!-      ■'■■ 


QUIDE 


NEW,  UPDATED 

EDITIONS  OF  OUR 

FAMOUS  NOVICE  LICENSE 

STUDY  GUIDE  AND 
NOVICE  STUDY  TAPES 


•  NOVICE  STUDY  GUIDE— by  Tfmot^ty  M.  Daniel  NSFSK.  Hme  Is  the  most  up  to  date  novice  gylde 
available.  It  Is  conn pjete  with  Information  about  learning  Morse  Code,  tias  the  latest  FCC  amateur  reguta- 

tJons  and  the  current  FCC  application  forms.  This  guide  is  rtof  aquestlon/answef  memorisation  course 
but  father  it  emphasizes  tlie  pfactical  side  of  getting  a  ham  license  and  puttfng  a  station  on  the  ain  It 
*     reflects  what  the  FCC  expects  a  Novice  lo  l^now  without  page  after  page  of  duH  theory.  The  most  current: 
information  stiJI  av^il^bie  at  last  year's  pdce.  SG7357  $4.95." 

•  NOVICE  STUDY  TAPES— If  you  aw  Just  getting  started  in  ham  radio,  you'll  find  these  tapes  Indispen- 
sable! This  up-to-the-minute  revision  of  the  73  Study  Course  Js  the  perfect  way  to  learn  everything  you 
need  to  breeze  through  the  Novice  written  e3<am.  Theory,  FCC  regmlations.  and  operating  sl<ills  are  all 
covered,  and  you'll  be  amazed  at  how  fast  you  Jearn  using  these  tapes! 

Once  the  lest  Is  behind  yoUr  these  tapes  will  go  right  or  being  useful,  because  ttiey  are  packed  with  the 
latest  information  on  setting  up  your  own  ham  station,  and  gettiing  on  the  air. 

Thousands  of  people  have  discovered  how  easy  learning  from  cassette  can  be — order  now  and  enter 
the  fascinating  world  of  ham  radio!  CT7300  Set  of  3— $15,95' 

Scientists  have  proven  that  you  learn  faster  by  liistening  than  by  reading  because  you  can  pi  ay  a  casr^ 

sette  tape  over  and  over  in  your  spare  time— even  while  you're  drivinp'!  You  get  more  anrf  more  info 
each  time  you  hear  it.  You  cant  progress  without  solid  fundamentals.  These  three  hour- long  tapes  give 
you  all  the  basics  you'll  n^ed  to  pass  the  Novice  exam  easiiy.  You'll  have  an  understand!  ng  of  the  ba- 
sics which  will  be  invaluable  lo  you  for  the  rest  of  your  life!  Can  you  afford  to  take  your  Novice  eKam 
without  first  listening  to  these  tapes? 

SPECIAL  OFFERI  Both  Novice  License  Study  Guide  a«d  Novice  Stud^ 
Tapes  $19.95.  Order  NP7300. 


t\e>N 


General  License  Study  Guide 


FROM  WAYNE  GREEN  BOOKS 


GENERAL  LICENSE  STUDY  GUIDE^by  Timothy  M. 

Daniel  N8R  K.  Th  is  is  the  complete  g  uide  to  the  General 
License.  Learning  rather  than  memorizing  is  the 
secret.  This  is  not  a  question-and-answer  gutde  that 
will  gather  dusi  when  the  FCC  issues  a  new  test.  In- 
stead, this  book  ^ill  be  a  helpful  reference,  useful  long 
after  a  ham  upgrades  to  General.  Includes  up-to-date 
FCC  rules  and  an  appiication  form.  Order  yours  today 
and  talk  to  the  world.  SG735S  $6.95 


•  ADVANCED  CLASS  LICENSE  STUDY  GUIDE— Ready 
to  upgrade  your  license?  To  prevent  retaking  the  FCC 
theory  exam,  you  need  the  7^  Advanced  theory  guide. 
SSB,  antenna  theory,  transmitters,  and  electronics 
measuring  techniques  are  covered  In  detail  tn  this  easy- 
to-follow  .study  guide.  Special  modes  and  techniques, 
such  as  RTTY,  are  also  treated-  An  engineering  degree  is 
not  necessary  to  master  the  Advanced  theory^ try  this 
book  before  visiting  the  examiner's  office!  (Published  by 
TAB  Books  previous  to  recent  changes  In  FCC  exam 
material.)  SGloet  $6  95-' 


FOR  YOUR  HAMSHACK 


*  QSL  CAR  DS— 75  tiirns  out  a  fantastic  series  of  QSL 
cards  at  about  half  the  cost  of  having  them  done  eise- 
where  because  t  hey  are  run  as  a  fill-in  between  print  I  ng 
books  and  other  items  in  the  73  Print  Shop.  250  Style 
W-aW0250-fOf  S8,95^  500  Style  W-QWOSOO-for 
S13.95';  250  Styie  X— QX0250— for  S8.95*;  500  Style 
X— QX0500;  250  Style  Y-^QVO^SO— for  S8.95*;  500 
Style  Y— QYOSOO—for  $13.95,*  Allow  6-12  wKs.  for 
deHvery. 


•  LIBRARY  SHELF  BOXES— These  sturdy  white,  cor- 
rugated, dirt-resistant  boxes  each  hold  a  full  year  of  73, 
Kilobaud  Microcomputing  or  BO  Micfocomputtng.  With 
vour  order,  request  self-sticking  labels  for  any  of  the 
following:  73,  Kilobaud  tlAicrocomputing,  SOMfcrocam- 
putmg,  CQ,  QST,  HBm  Radio,  Per  son  a  f  Computing. 
Radio  EtectroniGS,  interface  Age,  and  Byte.  Order  1  — 
BX1000— for  12.00*;  order  2-7-8X2002— for  $1S0 
each*;  order  6  or  more— BX10O2— for  Si. 25  each*. 


MAGAZINE 


Style  W 


-itM^  ^  i*^.**^  +  ^■inniiiMiliW. 


Style  Y 


g^i 


Style  X 

•  Preserve  and  protect  your  coifection  for  a  hfetimet 
Order  these  handsome  red  binders  wHh  gold  lettering. 
$7.50  for  1,  3  for  $21.75,  6  for  S42.0O.  (Postpaid  within 
USA,  please  add  $2.50  per  order  outside  USA,)  Check  or 
money  orders  only,  ryo  phone  or  C.O.D.  orders.  73 
Bi riders,  P.O.  Box  5120,  Philadelpftia,  PA  10141. 

*NOTE^— AboTC  addr«««  for  Binders  cmjy. 


7S 


CODE  TAPES 

ANY  FOUR  TAPES 
FOR  $15.95! 
$4.95  EACH 


"GENESIS" 

S  WPM— CT7305— This  is  the  beginning  tape  for  people 
who  do  not  know  the  code  at  all.  It  takes  them  through 
the  26  letters,  10  numbers  and  necessary  punctuation, 
complete  with  practice  every  step  of  the  way  using  the 
newest  blitz  teaching  techniques.  It  is  almost  mirac- 
uiousl  in  one  hour  many  people— inci:uding  kidsof  ten- 
are  able  to  master  the  code.  The  ease  of  Fearning  gives 
confidence  to  beginners  who  might  otherwise  drop  out. 


"THE  STICKLER" 

6+  WPM— CT7306— This  is  the  practfce  tape  for  the 
Novice  and  Technrcian  licenses,  it  is  made  up  of  one 
solid  hour  of  code,  sent  at  the  official  FCC  standard  (no 
other  tape  we've  heard  uses  these  standards,  so  many 
people  flunk  the  code  when  they  are  suddenly— under 
pressure- faced  with  characters  sent  at  13  wpm  and 
spaced  for  5  wpm).  This  tape  is  not  memorizabie,  unlike 
the  ^any  5  wpm  tape,  since  the  code  groups  are  entirely 
random  characters  sertt  in  groups  of  five. 


"BACK  BREAKER'^ 

13+  WPM— CT7313— Code  groups  again,  at  a  brisk  14 
per  so  you  win  be  at  ease  when  you  sil  down  in  front  of  Ihe 
steely-eyed  government  inspector  and  he  starts  sending 
you  plain  language  at  only  13  per.  You  need  this  extra 
margin  to  overcorne  the  panic  which  is  universal  in  the 
test  situations.  When  you've  spent  your  money  and  time 
lo  lake  the  tesi,  you'll  thank  lieaven  you  had  this  back- 
breaking  tape. 


"COURAGEOUS" 

20  +  WPM— CT7320— Code  is  what  gets  you  when  you 
go  for  the  Extra  class  hcense.  It  Is  so  embarrassing  lo 
panic  out  just  because  you  didn't  prepare  yourself  with 
this  tape.  Thouph  this  is  only  one  word  faster,  the  code 
groups  are  so  difficult  that  you'll  almost  faH  asleep  copy- 
ing the  FCC  stuff  by  comparison.  Users  report  that  they 
can't  believe  how  easy  20  per  really  is  with  this  fantastic 
one  hour  tape. 


"OUTnAGEOUS'* 
25+  WPM— CT7325— This  is  the  tape  for  thai  small 
g  ro  u  p  of  over ach  i  e v  i  ng  h  a  m  s  w  ho  wou  Idn't  be  conten  t  to 

simply  satisfy  the  code  requlremems  of  the  Extra  Class 
license.  It's  the  toughest  tape  we've  got  and  we  keep  a 
permanent  file  of  hams  who  have  mastered  it  Let  us 
know  when  you're  up  to  speed  artd  we'll  inscribe  your 
name  in  73  s  CW  "HaH  of  Fame;' 


SSTV  TAPE 

•  SLOW    SCAN    TELEVISION    TAPE-CT7350-Ph2©. 

winning  programs  from  the  73  SSTV  corftest.  Excellent 

for  Demo!  $5,95.* 


BACK  ISSUES 

•  SACK  ISSUES— Complete  your  collecllon:  many  are 
Drime  coHeciables  now,  classics  in  the  field!  A  full  col- 
eclion  is  an  invaluabie  compendium  of  radio  and  elec- 
tronics knowledge! 

733006       73  BACK  ISSUE— BEFORE  JULY  1980 

%  3.00 

73  BACK  tSSUE  JULY  19S0  THRU  OCT.  1981 

SI  "in 

73  BACK  ISSUE  NOV.  19B1  TO  PRESENT 

73  BACK  ISSUE— 5  YOUR  CHOiC 

..,....,.$10,75 

73  BACK  ISSUE— 10  YOUR  CHOICE 

, $16.00 

73  BACK  ISSUE— 25  YOUR  CHOICE 

$27  00 

73  BACK  fSSUE— 25  OUR  CHOICE 
.„... $14.00 

Shipping:  Please  add  $1.00  per  magazine.  Orders  of 
ten  magazines  or  twenty-five  magazines  add  $7.50 
per  order. 


73350 

73350 P 

73005 

73010 

73025 

73125 


BINDERS 


*  Use  the  order  card  in  this  magazine  or  itemize  your  order  on  a  separate  piece  of  paper  and  mai  i  to:  73  Radio  Bookshop  • 

Peterborough  NH  03456.  Be  sure  to  Include  check  ordetaiied  credit  card  lAfofrnation.  NoCO.D.  orders  accepted.  All  orders 
add  SI. 50  handfing  first  book,  $1.00  each  additional  book,  $10.00  per  book  foreign  airmail.  Please  allow  4-6  weeks  for 
delivery.  Questions  regarding  your  order?  Please  write  to  Customer  Service  at  the  above  address,  (Prices  subject  to  change 

on  books  io:  Dutj'  ^hed  by  73  Magazine,) 


FOR  TOLL  FREE  ORDERING  CALL  1-800-258-5473 


I 


1 


I 

I 


I 


mmi' 


WW''^ 


«t  j.w  aitLti^^ 


!«•  nrv^'b  tM'— u^  tmri*  **nj^  Kk 


THE  © 
TECHNICAL 

LIBRARY 


BEHIND  THE  DJAL— by  Bob  Grove.  Get  mow  fun  out  oJ 
shrortwave  listening  with  this  Jrttere&ting  gyide  to 
receivers,  antennas,  frequencies*  and  inteFference. 
BK?307  34.95/ 


THE  CHALLENGE  OF  160— Is  the  nev^esl  book  Jn  the  73 
technical  library,  dedicaled  to  !eo-meter  Qperating.  SI 
Dunn  provJdes  all  ne<;essary  informallon  lo  get  started 
On  tt>is  unique  band.  The  a H- Important  antenna  and 
ground  systems  are  described  in  del  ail.  The  inhroduclion 
contains  interesting  photos  o(  Slew  Perry's  (I he  King  oH 
t60)  Shack,  This  reference  is  a  must  for  new  and  ei(- 
perienced  "Top  Band"  operators,  BK7309$4.95/ 


SSB...THE  MISUNDERSTOOD  MOOE-by  Jamei^  B.  MEW 
Wilson.  Single  Sideband  Transmission . .  .  thousands  of 
us  use  it  every  day,  yet  ft  remains  one  of  the  least 
understood  facets  of  amateur  radio.  J.  B,  Wilson 
presents  aeveraf  methods  of  sideband  generation,  am- 
ply JFIustraled  with  charts  and  schematics,  which  Willi 
enable  th$  ambitious  reader  to  construct  his  own  side- 
t^and  generator.  A  must  for  the  technically-serious  ham, 
BK7351  S5,50,* 


wmo 

PRESS  S£1WICSS 


PROPAGATION  WIZARDS  HANDBOOK—  by  J.  H. 
Nelson.  Wtien  sun&pots  riddled  the  wofldv^ide  com- 
munications  networks  of  ttie  I940s^  John  Henry  Nelson  gt^t r^ii  i 
looked  to  the  planets  for  an  answer.  The  result  was  a  IN  F.  W 
theofy  of  propagation  forecasting  based  upon  inter- 
planetary  allgnrneni  that  made  tti©  author  the  most  re- 
liable forecaster  in  America  today.  The  book  provides  an 
enMghtened  loof^  at  communi  cat  sons  past  present  and 
future,  as  well  as  teachtfFQ  the  art  of  propagation 
forecasting.  BK7302  S6.95.' 


WORLD  PRESS  SERVJCE  FREQU  ENCIES^by 
Thomas  Harrington  Can't  wait  to  hear  the  evening 

new3,  or  are  you  wondering  about  the  news-  that  you 
aren't  hearing?  Receive  by  Radio  Teletype  ^RTTY)  sU 
the  world  news  and  financial  happenings  from  the 
world  Capitols  on  a  24  hour  a  day  basis.  This  book  gives 
you  tine  frequencies  snd  limes  of  broadcast  of  such 
news  services  as  AP,  UPt,  Reuters^  TASS,  VGA  and 
London  Press.  Also  included  Js  an  introduction  to 
RTTY  with  Information  on  equipment,  antennas,  abb  re- 
vial  Ions— everything  you  need  to  get  started  In  RTTY. 
BKl  20217,95* 


TOOLS  &  TECHNIQUES  FOR  ELECTRONICS— by  A.  A. 
WicHs  is  an  easy-to- understand  book  written  tor  the 
tiepinning  kit-buitder  as  weil  as  the  experienced  hob- 
byist. It  has  numerous  pictures  and  descriptions  of  the 
safe  and  correct  ways  to  use  basic  and  specialized  tools 
for  electronic  projects,  as  weil  as  specialized  metal- 
working  tools  and  the  chemical  aids  which  are  used  in 
repair  shops.  BK734e$4.95,* 


S^,9S 


COffr^TT 
COOKBOm 


'•■! 


FOR 
THE 


CONTESTERl 


fciii   'wji. 'prij'i^ -lipaiyib- J ■ 


THE  COhiTEST  COOKBOOK— reveals  the  secrets  ot  the 
contest  winners  fdomesTic,  DX,  and  specialty  coniests), 
complete  with  photos  and  diagrams  of  e<^uipment  used 
by  the  top  scorers.  Find  out  how  to  make  ISO  contacts  in 
Of^e  Jiour.  HK7308  S5  95.* 


THE  NEW  WEATHEPt  SATELLITE  HANDBOOK-by  Dr. 

Ralph  E.  faggart  WBeOQT.  Here  is  ti^e  completety  up- 
dated and  revised  edition  containing  all  the  informa- 
tion on  the  most  sophisticated  and  effective  space 
craft  now  in  orbit.  This  book  serves  both  the  experi- 
enced amateur  satellite  enthusiast  and  the  newcomer, 
it  is  an  introduction  to  sateiiite  watching,  providing  all 
the  information  required  to  conslruct  a  complete  and 
highly  effective  ground  station.  SoMd  hardware 
designs  and  all  the  Instructions  necessary  to  operate 
it>e  equipment  are  included.  For  experimenters  who 
are  operating  stations,  the  book  details  all  procedures 
necessary  to  modify  equipment  for  the  new  series  ol 
spacecraft.  Amateur  weather  satellite  activity  repre- 
sents a  unique  tJiend  of  interests  encompassing  elec- 
tronics, meteorology  and  astronautics.  Join  the  privi- 
leged few  in  watching  the  spectacle  of  earth  as  seen 
from  space  on  your  own  monitoring  equipment. 
QK73B3$a.35.* 


INTERFERENCE  HANDBOOK— by  William  R,  Nelson, 
WASEQG  — This  tirnely  handbook  covers  every  type  of 
Hf\  problem  and  gives  you  the  solutions  based  on 
practical  experience.  Covers  Interference  to  TV,  radio, 
hl^fi,  telephone,  radio  amateur,  commerciat  and  CB 
equipment.  Power  fine  Interference  is  covered  in  deptti 
— how  to  locate  it,  cure  it,  work  with  the  public,  safety 
precautions,  how  to  train  RF/I  investigators.  Written  by 
an  RFI  expert  with  33  yearsof  experience,  this  profuse- 
ly illustrated  book  is  packed  with  practical  easy-to- 
understand  information,  BK1230  Se.95  * 


IC  OP  AMP  COOKBOOK— by  Walter  G.  Jung  Covers 
not  only  the  basic  theory  of  the  IC  op  amp  in  great 
detail,  but  also  includes  over  250  practical  circuit  ap- 
plications, liberally  illustrated.  592  pages.  SVixeVs, 
softbound.  BK1028  $14.95.* 


OWNER  REPAIR  OF  f^ADIO  EQUIPMENT— by  Frank 
Glass  K6RQ.  Here's  a  book  that  will  leach  you  an  ap- 
proach to  troubleshooting  without  a  shack  full  of  teat 
equipment.  Written  in  a  narrative,  non- mathematical 
style,  it  will  encourage  you  to  successfully  fix  your  own 
rig  problems  SO  to  90%  of  the  time.  Even  if  you  don't 
want  to  fix.  you  can  learn  a  lot  about  how  things  work 
and  fail.  Add  to  your  library  and  personal  expertise. 
BKr3lOS7.95.' 


HANDBOOKS 
FOR  THE 
HAMSHACK 

NEW 

THE  COMPLETE  SHORTWAVE  LISTEJ*4ER'S  HAND- 
BOOK, 2nd  EDITIOW  by  Hank  Bennett  and  Harry  L. 
Heims.  This  comprehensive  volume  contains  Eoads  of 
new  information  from  all  over  the  world  on  the  latest 
developments  in  SWL  technology  clubs,  associations, 
pract Ices  and  stations.  A  ttiorough  guilds  to  stations  of 
the  world  by  general  continental  area  and  frequency  is 
included.  BK1241  $9.95 

THE  TEN  METER  FM  HANDBOOK~by  Bob  Hell  K9E1D. 
This  handbook  has  been  published  to  help  the  ten  meter 
enthusiast  learn  more  about  the  many  methods  of  con- 
versions and  tricks  ttiat  are  used  to  make  existing  units 
work  better.  Join  the  great  "Tinkerers"  of  the  world  on  ten 
FM  and  enjoy  the  fantastic  amount  of  fun  in  communi- 
cating with  amateur  stations  worldwide  on  ten  meter 
FM.  BK1190$4.95,' 

THE  PRACTICAL  HANDBOOK  OF  AMATEUR  RADIO  FM 
REPEATERS— by  Bili  Pasternak  WA6ITF  (author  of  73 

Magazines  monthly  column  "Looking  West")  This  is  the 
book  for  ihe  VHF/UHF  FMer,  compiled  from  material 
submitted  by  over  a  hundred  individuals,  clubs, 
organizations  artd  equipment  manufacturers.  A  "must 
have'  for  your  ham  shack  shelf.  BKl  185  $12.95/ 


The  IS 


Test  Equipment 


VOL.  li  AUDIO  FREQUENCY  TESTERS -J  am  packed 
with  all  kinds  of  audio  frequency  test  equipment  It 
you're  Into  SSB,  RTTY,  SSTV,  etc,  this  book  is  a  must  for 
you , .  ,a  good  book  for  hi-fi  addicts  and  experimenters, 
tool  LB7360$4.95.* 

VOL.  Ill  RADIO  FREQUEWCY  TESTERS— Radio  frequen- 
cy waves,  the  common  denominator  of  amateur  radio. 

Such  items  as  SWR,  antenna  impedance,  line  imped- 
ance, RF  oulpull,  and  field  strength;  detaiied  instructions 
on  testing  these  items  includes  sections  on  signal  gen- 
erators^  crystal  calibrators,  grid  dip  oscillators^  noise 
generators,  dummy  loads,  and  much  more. 
LB7361  $4.95.* 

VOL.  IV  IC  TEST  EQUIPMENT— Become  a  trouble- 
shooting wizard!  In  this  fourth  volume  of  the  73  TEST 
EQUIPMENT  LIBRARY  are  42  home  construction  proj- 
ects for  building  test  equipment  to  work  with  your  ham 
station  and  in  servicing  digital  equipment.  Plus  a 
cumulative  Index  for  all  tour  volumes  for  the  73  TEST 
EQUlPI^ElstT  LIBRARY.  LQ7362  S4.95,* 

RF  AND  DIGITAL  TEST  EQUIPMENT  YOU  CAN 
BUILD—  BK1044— Rf  burst,  function,  square  wave  gen- 
erators, variable  fength  pulse  generators  — 100  kHz 
marker,  if  and  rf  sweep  generators,  audio  osCi  af^rf  sig- 
nal Injector,  146  MHz  synthesizer,  digital  readouts  for 
counters  several  counters,  prescaler,  microwave 
meter,  etc.  252  pages.  BK1044  35,95.* 


"Use  the  order  card  m  this  magastne  or  Itemrze  your  order  on  a  separate  piece  ol  paper  and  mail  to:  73  Radio  Bookshop  • 
Peterborough  NH  03458.  Be  sureto  include  check  or  detailed  credii  card  information.  NoC.O.D.  orders  accepted.  All  orders 
add  Si. 50  handling  first  book.  $1.00  each  additional  book,  $10.00  per  book  foreign  airmail.  Please  allow  4-6  weeks  for 
delivery.  Questions  regarding  your  order?  Please  write  loCusiomer  Service  at  theabove  address.  (.Prices  subiect  to  change 
on  books  not  published  by  73  Magazine.) 


FOR  TOLL  FREE  ORDERING  CALL  1-800-258-5473 


ANTENNA 

BOOKS 


PRACTICAL  ANTENNAS  FOR  THE  RADIO  AMATEUR 
—A  manuaJ  describing  how  \o  equip  a  ham  station  with 
a  suitable  antenna.  A  wide  range  of  antenna  topics, 
systems,  and  accessories  are  presented  giving  the 
reader  some  food  for  ihought  and  practical  I  data  for  con- 
struct tori.  Designed  to  aid  the  eKperienced  ham  and 
novice  as  weJI.  Onl^  BK101_5:$9,95.' 

VHF  ANTENNA  HANDBOOK— The  new  VHF  Antenna 
HandtooH  deiaiis  the  theory,  design,  and  constructton 
of  hundreds-  of  dlHerent  VHF  and  UHF  antennas. ,  .a 
practical  book  written  tor  the  average  arnaleur  who 
takes  joy  fn  t^uiiding,  no!  i\j\\  of  compiex  formuJas  for  the 
design  engineer  Packed  with  fabjiOLis  antenna  projects 
you  can  build.  BK7368  S5.95." 

73  OIPOLE  AND  LONGWmE  ANTENNAS  ^by  Edward 
M.  Noli  W3F0J.  Thts  is  the  first  coDectton  of  v^^tualiy 
every  type  o^  wireanienna  used  by  ar^ateurs.  includes 
dimensiions.conhgy  rations,  and  detailed  construction 
data  For  73  differenl  antenna  types.  Appendices 
describe  the  construction  of  noise  bridges,  line  tuners, 
and  data  on  measuring  resonanl  frequency,  velocity 
factor,  and  swr  BKIOie  ^5,50.* 

•  ALL  ABOUT  CUBICAL  QUAD  ANTENNAS  (Znd  ectJ- 
tion)— BK1196  — The  -Classic"  on  Qusd  design, 
theory,  conslructton,  and  operation.  New  2nd  edition 
contains  new  feed  and  matching  systems  and  new 
data.  S5-95.' 

•  BEAM  ANTENNA  HANDBOOK  (New  Stti  edition)- 

BK1 1197— Yagt  beam  theory,  construction  andoperalion 
information  on  wire  beams.  SWR  cur.ves  and  matching 
systems  A  -must"  for  senous  DXers  S5.ft5" 

•  VHF  HANDBOOK  FOR  RADIO  AIWATEURS-BK 11 9B 

—  Contairts  informattcin  on  FM  theory,  operation  and 
fBguipment,  VHF  antenna  design  and  construction,  satei- 
Iil.e-EJVIE.  and  ! he  newest  so hd -state  circuiis,  S.6.95' 

•  THE   RADIO   AMATEUR    ANTENNA    HANDBOOK- 

BKn99— All    aboui  Mite   aniennas.    beams,    lurters/ 
baiiuns.  coax,  radiats,  SWR  and  towers.  Clear  and  com- 
-plete  infornnarion  £6.95" 

•  SIMPLE,  LOW  COST  WIRE  ANTENNAS  FOR  RADIO 
AMATEURS—  BK 1 200— All  nevtf  data  and  everything  you 
want  to  know  about  low-cost,  riiuili-band  antennas,  inex 
pensive    beams,    "tnvisib^e"    antennas   toi    hams    in 
"lough'  iocahons,  S695" 


BEAM 


a-rt*  ePiTio»^ 


THE  WELL 
EQUIPPED 


HAM  SHACK 


COOK  BOOKS 

TTL  COOKBOOK  — by  Don  Lancaster  Explains  whai 
TTL  E3,  how  it  vyorks,  and  ho^  fo  gee  ii.  Discusses  prac- 
tical applications,  such  as  a  dtgitat  counter  and  dis- 
pJay  system,  events  counter,  eiectronfc  stopwatch, 
djgital  voU meter  and  a  digital:  tachomeier. 
B  KlOfJ3  .$9.&0.  * 

CMOS  COOKBOOK  — by  Don  Lancaster    Details  the 

apptioaikm  of  CMOS,  the  low  power  logic  family 
suitable  for  most  applicalions  presently  dommated  by 
TTL.  Required  reading  for  every  serious  digitaf  ex- 
perimenter! BK1011  $10,50,' 

TVT  COOKBOOK— by  Don  Lancaster    Describes  the 

use  of  a  standard  television  receiver  as  a  rnicropro- 
cessor  CRT  termmal.  Explains  and  describes  charac- 
ter generation,  cursor  control  and  interface  informa- 
tion in  typical,  easy-to-understand  Lancaster  style. 
BKt064  59.95.* 


SPECIAL  OFFER 

Chart  of 
UNITED  STATES  AMATEUR 

RADIO  PRIVILEGES 

by  ctass  of  license,  etnlfision  type,  and  fre^ 
qucncy  from  t&O  ttiru  2  met«rs,  including  pro- 
vision for  the  new  30,  1 7,  and  12  meter  bands. 
TtiiB  22  3t  28  ln>  twelve  color  chart  Is  the  first 
of  Its  kind  CD  be  both  inlorcnative  and  decora^ 
tlve,  S3, DO  value,  only  $l.9S  with  the  pur- 
chase of  1  or  more  booka  from  the  Radio  Book- 
shop.  [Supplies  limited,  order  now.l 
CH7300  &1.95. 


•  HOW  TO  DEFEND  YOURSELF  AGAINST  RADAR— BKt 201  — by  Bruce  F  Bogner  and  James  R.  Bodnar.  a  lavvyer 
and  radar  expert.  This  book  g^ves  you  the  ammunition  to  challenge  the  radar  -■evidence"  that  usually  leads  to  a 
speeding  convi:ction,  The  major  part  of  the  book  details  the  inner  workings  of  radar — you'll  become  more  of  an  e5<- 
pert  than  most  police  off-icers  and  judges.  The  remainder  of  the  book  outlines  how  to  defend  yourself  against  a 
speeding  ticket  —  the  observations,  measures  and  testimony  you  must  obtain  lo  defend  yourself  without  the  he^p  of 
a  Jawyer.  The  price  is  a  lot  less  than  a  line?  S6.96* 


WORLD  REPEATER  ATLAS-Compieteiy  updated,  over 
230  pages  of  rep^'ater  listings  are  inde;<ed  by  location 
and  trequency.  More  than  50  maps  pinpoint  20O0  repeat- 
er locations  throughout  the  USA.  Foreign  listirigs  in- 
clude Eufope,  the  Middle  East.  South  America,  and 
Africa.  $4.95'  BK731& 

THE  MAGIC  OF  HAM  RADIO— by  Jerroid  Swank  W8NXR 
beg(ns  with  a  brief  history  of  amateur  radio  and  of  Jerry's 
invoi^vement  in  it.  Part  2  details  many  of  ham  radio's 
heroic  moments  Hamdom's  ctose  ties  witti  the  contis- 
nent  of  Antarctica  are  the  subject  of  Part  3.  in  Part  4  the 
strange  and  humorous  sides  of  ham  lite  get  their  due. 
And  what  of  the  future?  Part  5  peers  intQihe  crystai  balJ. 
S4.95.*  BK7312  -..--:• 

A  GUIDE  TO  HAM  RADfO— by  Larry  Kahaner  WBzr^EL 
What's  Amateur  f^adio  all  about?  Vou  can  team  the 
basics  of  this  tascinating  hobby  wrth  this  excellent 
beginner's  guide.  It  answers  the  most  frequently  asked 
questions  in  an  easy-going  manner,  and  it  shows  the 
besJ  way  lo  go  about  getting  an  FOG  Jicense-  A  Guide  to 
Ham  Radio  is  an  ideal  introduction  to  a  hobby  enjoyed 
by  people  around  the  world.  $4.9S.*  BK7321 

WORLD  RADIO  TV  HANDBOOK  1982,  25TH  EDITION 

—This  book  is  the  bible  ot  international  broadcasters^ 
providing  the  only  auftn-oritaiive  source  of  exact  intorma- 
lion  about  broadcasting  and  TV  stations  world  WEde. 
This  1981  edition  is  completely  revised,  giving  com- 
prehensive coverage  of  short,  medium  and  long  wave, 
560  pages  of  vitaJ  aspects  of  worid  listening. 
$16.50.  BKiiJ^4 


MICROCOMPUTER  BOOKS  FROM  73 


©AMES 

flDTn 

■i..r»:i.i     rmrocompufing 


Hwflr-.  ■        •        I.-.    ..  .^    I     ,,    ='^  -       -  ■ 


•  SOME  OF  THE  BEST  FROM  KiLOBAUD^MfCROCOM- 
PUTiNG— BK/31 1  —A  coiiect^on  of  the  best  arcicies  that 
have  recently  appeared  in  Kilobaud/  MtCROCOM PUT- 
INS Included  Is  material,  on  the  TRS-80  and  PET 
systems,  CP.'fv^.  the  mBOfBOB^/im  chips,  the  ASR-33  ter- 
minal. Data  base  managemenl,  word  processing,  text 
editors  and  file  structures  are  covered  loo.  Programming 
techniques  and  hardcore  hardware  construction  proj- 
ects for  modems,  high  speed  cassette  interfaces  and 
TVTs  are  also  included  tn  this  large  format,  200  plus 
page  edition.  $10.95.* 

•  40  COMPUTER  GAMES— BK?3e  1  —  Forty  games  m  atl 
in  nine  different  categories.  Games  for  large  and  small 
systems,  and  even  a  section  on  calculator  games,  Many 
versions  of  BASIC  used  and  a  wide  variety  of  systems 
represented  A  must  lor  the  serious  computer  games- 
man.  $7.95' 

•  THE    NEW    HOBBY    COMPUTERS— BK7340— This 

book  takes  it  from  where  '■HOSBY  COivlPUTERS  ARE 
HERE!"'  leaves  off.  with  chapters  on  Large  Scale  integta- 
tion.  how  to  choose  a  microprocessor  chip,  an  introduc- 
tion to  pfogramming,  tow  cost  I/O  for  a  computer,  com- 
puter arithmetic,  checking  memory  boards... and 
much,  niuch  more!  Don't  miss  this  tremendous  value! 
Only  $4.95* 


♦  UNDERSTANDING  AND  PROGRAMMING  ftillGRO- 
ClOMPUTEflS— 8K7382— A  valuable  addition  to  your 
computing  library.  This  Iwo-part  text  includes  the  best 
articles  that  have  appeared  in  73  and  Kilobaud 
f^icrocomputing  magazines  on  the  hardware  and  soft- 
ware aspects  of  microcomputing.  Well-known  authors 
and  weil^structur^d  text  helps  the  reader  get  involved. 
S10.95^ 

ANNOTATED  BASIC— A  NEW  TECHNIQUE  FOR  NEO- 
PHYTES. VOL  1  A  2— Annotated  BASIC  explains  the 
complexities  of  modern  BASIC  It  includes  complete 
TRS-ao*  Level  M  BASIC  programs  that  you  can  use. 
Each  program  is  annotated  to  explain  In  step-by-step 
fashion  the  workings  of  the  program.  Programs  are 
fiowcharted  to  assist  you  m  following  the  operational 
sequence.  And — each  chapter  includes  a  description 
of  the  new  c-oricepts  which  have  been  introduced. 
Annotated  BASIC  Votume  1  BK73a4  E1D.95 
Annotated  BASIC  Votume  2  BK73e5  110.95 
Order  Both  Voiutnes  and  Save!  BK738402  $18.95 

HOBBY  COMPUTERS  ARE  HEREtff  you  want  to  come 
up  to  speed  on  how  computers  work — hardware  and 
software— this  is  an  excetient  book.  It  starts  with  fun- 
damentals and  explains  the  circuits  and  the  basics  of 
programming,  along  with  a  couple  of  TVT  construction 
projects.  ASCII,  Baudot,  etc  This  book  has  the  highest 


rh 


recommendations  as  a  teaching  aid.  |i4,95, '  BK7322 

'Use  the  order  card  in  this  magazine  or  itemize  your  order  on  a  separate  piece  of  paper  and  mail  to:  73  Radio  Bookshop  • 
Peterborough  MH  03458,  Be  sure  to  include  check  or  detailed  credit  card  inlormation,  NoC.O.D,  orders  accepted.  All  orders 
add  SI. 50  handling  first  book,  $1.00  each  additional  book,  SlO.OO  per  book  foreign  airmail.  Please  allow  4-6  weeks  for 
del  I  very.  Questions  regarding  your  order?  Please  write  to  Customer  Service  at  the  above  add;fe:SS.i  Prices  subject  lo  change 
on  books  no!  published  by  73  Magazine.) 


FOR  TOLL  FREE  ORDERING  CALL  1-800-258-5473 


Improve  73  and  our  other  publi- 
cations. With  our  mountains  to 

climb,  he  coufd  easily  take  off 
about  fifty  to  seventy-five 
pounds  and  get  into  f igh ting 
trim  to  help  amateuf  radio  get 
back  into  a  growth  mode.  What 
say  there.  Harry?  i  know  he's  al- 
ways been  a  very  big  fan  of 
mine,  so  let's  see  what  happens. 

WHATS  THAT  CLOUD? 

Is  that  a  nuclear  blast  cloud 
rising  over  New  Hampshire?  No, 
the  work  on  our  nuclear  power 
generator  seems  to  have  been 
halted.  A  clipping  sent  in  from  a 
North  Carolina  paper  (where 
they  put  much  stock  in  these 
things)  gives  us  a  hint.  It  seems 
thai  there  are  more  cigarettes 
per  person  sold  in  New  Hamp 
shire  than  in  any  other  state. 
Atx>ut  254.4  packs  for  every  per- 
son. - .  includmg  the  kids- 

Now  before  you  get  the  idea 
that  my  own  efforts  to  stem  the 
tide  of  smoking  by  not  hiring 
smokers  is  totally  ineffective.  I 
should  point  out  that  New 
Hampshire  has  a  lower  tax  on 
cigarettes  than  other  states. 
The  result  is  that  Massachu- 
setts (called  taxachusetts)  peo- 
ple come  up  here  in  swarms  to 
buy  cigarettes  and  liquor,  both 
of  which  are  a  bargam  in  New 
Hampshire. 

The  gas  stations  along  the 
border  do  a  iand-office  business 
In  cancerettes^  helping  substan- 
tially to  stamp  out  life  in  the 
great  commonwealth  Just  south 
of  us.  Liquor  is  sold  in  state  li- 
quor stores,  thus  giving  us  a  cut 
of  the  action  towards  lowering 
taxes.  Indeed,  we  are  the  lowest 
taxes  state,  with  no  sales  tax 
and  no  personal  income  lax. 

The  only  serious  problem  we 
have  Is  the  air  pollution  along 
the  Massachusetts  border  from 
all  those  cigarettes. 

NO  NEWS  VS.  GOOD  NEWS 

The  recent  purchase  of  The 
Daily  N&ws  in  New  York  brought 
back  memories  of  my  first  visit 
to  The  News,  back  in  1938. 
When  I  visited  The  News  along 
with  my  high  school  class  (we 
often  went  on  field  trips  to  see 
businesses),  little  could  I  have 
imagined  that  jn  ten  years  i 
would  be  working  for  WPIX,  The 
News'  television  station.  Heck, 
In  those  days  television  was  a 
new  invention  which  was  being 
shown  at  the  New  York  World's 
Fair.  The  sets  for  receiving  the 
few   broadcasts  were  pmhEbi- 

124     73  Magazine  •  June/1982 


tively  priced.  In  1938,  I  was  jUSt 
barely  getting  going  in  amateur 
radio,  having  been  involved  for 
about  a  year. 

The  Qaiiy  News  plant  was 
modern  then,  with  new  high* 
speed  presses  and  row  upon 
row  of  Linotype  machines.  The 
Linotype  operators  delighted 
my  classmates  by  making  up 
our  names  in  type  slugs  and 
tossing  them  to  us,  burning  our 
hands  with  the  hot  lead  while 
they  laughed. 

Hitler  was  raising  hell  in 
Europe  and  war  was  brewing. 
Despite  the  barrage  of  propa- 
ganda, war  was  not  real  to  us 
and  rl  never  even  occurred  to  me 
that  before  long  I  might  be  going 
to  war  on  a  submarine  in  charge 
of  maintaining  and  operating  all 
of  the  complex  electronic  equip- 
ment. 

After  the  war. .  .  and  after  col- 
lege..  .having  avoided  entrap- 
ment by  large  corporations  (a 
fate  suffered  by  most  college 
graduates  which  dooms  them  to 
mediocrity  of  income  for  life)i  I 
found  myself  in  broadcasting. 
First  I  tried  radio  engineering 
and  announcing.  Then,  when  a 
spot  opened  at  WPIX  for  an  en- 
gineer. I  made  contact  through 
an  old  friend  Bob  Sullivan,  who 
worked  as  a  feature  writer  for 
The  Sunday  News. 

Bob,  a  friend  of  the  family, 
had  quite  an  influence  on  my 
life.  It  was  he  who  introduced 
me  to  classical  music  when  I 
was  about  seven.  He  also  was  a 
Gilbert  and  Sullivan  nut,  which  I 
became,  too.  I  maybe  got  even 
by  exposing  him  to  country  and 
western,  which  took  with  him. 

Before  we  could  pot  WPIX 
(channel  tljon  the  air.  we  had  to 
get  some  experience.  In  1948, 
there  were  no  unemployed  tele- 
vision cameramen  to  hire.  The 
News  rented  studio  space  a  few 
blocks  from  their  42nd  street 
skyscraper  at  Reeves  Sound 
Studios.  Buzz  Reeves  Is  reason- 
ably weJl  known  today  for  his  in- 
credible contest  station.  I  think 
they  use  the  call  N2AA.  Buzz 
was  one  of  the  wealthy  hams  I 
talked  with  when  1  was  looking 
to  start  73  Magazine ^  Wisely,  he 
was  not  interested. 

When  the  studios  were  fin- 
ished in  The  News  building,  we 
moved  to  there  and  finished  get- 
ting ready  to  go  on  the  air.  We 
learned  to  use  the  cameras,  to 
fix  them  while  operating,  to  han- 
dle the  mike  booms,  and  to  cope 
with  the  various  unions  which 
have  a  vice-like  control  of  New 


York,  The  inaugural  ceremonies 
were  in  the  lobby  of  the  building, 

with  me  as  the  cameraman. 

It  didn't  take  long  before  I  was 
nosing  around  the  top  floor  of 
the  skyscraper,  looking  for  a 
place  for  a  small  ham  station. 
I  found  an  unused  room  and 
soon  had  permission  to  use  It 
and  put  an  antenna  on  the  roof 
of  the  buUding.  I  brought  up  my 
SCR-522,  which  was  state-of- 
the-art  in  those  days.  Imagine, 
crystal  control!  Twenty  Watts! 
Then  I  put  one  of  the  Bill  Hois- 
ington  (W2SV)  16-elemenl 
beams  up  and  found  myself  with 
a  whale  of  a  signal.  I  could  work 
anything  from  central  Connecti- 
cut on  down  almost  to  Phila- 
delphia, including  all  of  Long 
Island.  I  made  thousands  of  con- 
tacts. Hams  are  still  bringing  my 
old  News  building  QSL  cards  to 
hamfests  to  flash  at  me. 

Being  young  and  fooHsh  (as 
differentiated  from  old  and  fool- 
ish), I  wanted  to  put  my  beam  in 
the  best  possible  location  on 
the  roof  of  the  building.  I  wanted 
it  out  in  the  open  so  that  1  would 
have  a  good  signal  in  all  direc- 
tions. Wetl«  the  onfy  really  good 
place  for  It  was  mounted  on  top 
of  a  parapet  I  have  to  admit  that 
I  was  a  bit  shaky  about  climbing 
out  on  it  to  set  up  the  rotator  and 
beam.  1  had  to  skinny  out  about 
fifty  feet,  with  a  25'Story  drop  on 
one  side  and  about  six  stories 
on  the  other.  Just  to  help  mat- 
ters, it  was  windy.  It  Is  always 
windy  on  top  of  a  37-floor  build- 
ing. 

My  stint  atop  The  News  build- 
ing had  lasting  repercussions.  It 
was  while  operating  from  this 
aerie  that  I  began  wondering 
what  those  strange  beedie- 
beedie  signals  were  on  the  high 
end  of  the  band.  I  started  asking 
around  and  was  led  to  John  Wil- 
liams W2BFD  out  in  Woodside, 
Queens.  John  was  playing 
around  with  radio  Teletype*'.  Be- 
ing an  unrepentant  experiment* 
er,  I  was  quickly  hooked  on 
RTTY. 

John  was  the  father  of  ham 
RTTY,  Me  got  a  lot  of  us  hooked 
on  it  in  the  late  40s.  My  downfall, 
if  you  like  to  think  of  it  as  that, 
came  whan  I  went  to  work  for 
WXEI-^  a  television  statiofi  in 
Cleveland.  1  was  hired  on  as  a 
television  producer  and  director. 
They  had  a  mimeo  machine, 
which  was  a  fairly  rare  item  In 
those  days.  Within  a  few  days.  I 
managed  to  get  the  first  issue  of 


a  H77T  Buitetin  out  for  the  few 
hundred  RTTY  experimenters.  I 
almost  ruined  the  mimeo  ma- 
chine in  the  process,  but  I  was 
started.  The  BuUeiin  grew  into 
Amateur  Radio  Frontiers  and 
kept  going  on  almost  a  monthly 
basis  until  I  became  editor  of  CO 
in  January,  1955, 

The  News  has  changed  re- 
markabfy  tittle  in  the  last  thirty 
years,  which  probably  is  why  It 
was  recently  put  up  for  sale-  The 
graduat  closing  of  one  New  York 
paper  after  another,  often  in  the 
wake  of  strikes,  has  kept  the 
papers  from  making  much 
money.  That  and  union  opposi- 
tion kept  The  News  from  mod- 
ernizing their  equipment.  1 
wouldn't  t>e  surprised  if  they  still 
had  some  of  those  old  Linotype 
machines  being  used  to  set  hot 
slugs  of  type.  I  should  get  back 
for  a  visit  and  see  if  any  of  the 
old  television  crew  are  still 
there. 

Bill  Holslngton's  fire  tower 
eventuaiiy  blew  down  in  a  storm 
and  he  found  himself  fired  from 
the  firm  he  had  worked  with  for 
years.  The  main  reason  for  let- 
ting him  go  seemed  to  be  that  he 
was  getting  too  close  to  retire* 
men!  pension  age.  He  went  into 
business  writing  a  long  series  of 
simple  VHF  and  UHF  construc- 
tion projects  for  73.  He  moved  to 
Peterborough  (as  K1CLL)  to 
make  this  simpler-  Following  a 
divorce  and  some  serious  ill 
health,  Bill  moved  to  the  Phltip* 
pines  and  got  remarried.  He 
seems  to  be  living  happily  ever 
after  there,  still  working  on  sim* 
pie  i^ome  VHF  projects. 

You  know,  one  of  the  odd 
things  atiout  operating  from  the 
top  of  a  skyscraper  or  a  mourH 
tain  is  that  when  the  two-meter 
band  begins  to  open,  it  is  the 
stations  on  the  ground  which 
hear  the  skip  signals  firsL  I 
would  hear  New  York  stations 
working  down  into  Virginia  and 
North  Carolina  for  an  hour  or 
more  without  being  able  to  hear 
a  whisper  of  the  southern 
chaps.  Then,  when  the  DX  was 
starting  to  work  on  up  into  Con- 
necticuti  I  would  start  hearing 
them  and  be  able  to  make  con- 
tact. My  elevation  had  little 
benefits  for  that  type  of  contact. 
There  are  drawbacks  to  sky- 
scrapers and  mountains. 

Well,  I  hope  that  the  new 
owners  of  The  News  will  mod' 
ernize  it  and  keep  it  going.  I  en- 
joyed my  working  there  and  will 
never  forget  the  excitement  of 
DXing  from  that  spot. 


STATE-OE-THE-ART 


AMATEUR   SPECIAL  $529.00 


20BfHz 
DUAL  TRACE 


Oscilloscopes 


^m 

™ 

^^^^^^B,*' 

#- 

& 

t 

.1 

*J 

m 

"^^ 

^  ' 

9 

i 

^ 

o 

r 

^ 

*  ■! 

im  * 

M. 

to  meet  ei^ry  need 


MODEL  HM-203 


WITH  PROBES:  x  1  a-  x  10 

•  ONE  YEAH  FULL  WARRANTY 

•  SOLID  STATE 

•  ASSEMBLED  &  CALIBRATED 

(603)434-5371 


DE^AL-ER  INlgtTIRIES  INVITED 


^  133 


DERRY.  N.H.  0303S  WARNER  HILL 


The  Saturn-V  receiver  is  a  high  quality  recefver  that 
enables  you  to  receive  many  ranges  of  (ocai  micro- 
wave signals.  It  is  normally  used  within  line  of  sight 
of  a  transmitting  tower  in  a  50  mile  range  and  is 
simply  attached  to  your  TV  antenna  mast. 

Micro  wave  af  id  S<^teli  !e  S  yat  ems 


T 


Ifidmt  1 14^$ 


1^3       $1S5.00 

4-11    inoM 

12'Up  $105.00 


4558  Auburn  Blvd..  Suite  208 

Sacramento.  CaJrfornia  95841     (916J  454^2190      ^72 


Two-meter  H.T.  Amplifier  Kit 


ask  about 
our  other 
UHF  ^  VHF 
ampliljaf  Nits 


1.5  watts  in— 20oul 
COR  BNC  )fi— SO-239  out 
smatf  size:  1-5/16' x3'x4^1/2 
CFa&s  C  or  ABl 


►^459 


t3&8  Edwards  Ave. 

QRO  ENGINEERING  '''f.^ir'ii'sl^"" 


1-800-654-885a 

Our  small  miradp  is  simph  this:  caD  Sentn's  TOLL  FREE 
TiumfHT.  and  ue  II  deliver  ihe  tint^i  qualift  cnsialN  im  time — 
from  the  working  days  to  two  weeks,  plus  our  4^-hour 
Emergenn  Service  * 

The  minicle  ^jows  iarj^er  when  wu  examine  Seiitr>'*s  quality 
worknian*jhip.  Each  crvsiui  iii  made  of  flawless  materials  and 
hand  crafted  uidi  state*nf-the*art  tecKnologv  to  exceed 
M I L'Spec  standards.  _^ 

And  when  you  consider  thai  Sentr>'  is- 
siiU  a  sinall.  dependable  company    ^ 
oui-performing  die  bij;  tmes.  our 
small  miracle  lakes  on  giant  pro- 
port  ji>iis.  Faci  b,  moM  otlier 
C(?mpanle5>  can't  wftrk  our  miracles, 
hjj^  (»r  smaU. 


Cns^l  Parifc,  Chickn^ha,  uyahonm  ^3018 


^333 


'  ?\ms€  jiJIow  extra  time  for  precision,  I HF  sLnd  ?^pt*cial  frequencies. 


Introducing 
A  Whole  New 
World  Of 
Capability  For 
Your  Repeater  • 


The  RC- 850 
Repeater 

Controller! 


QCC 


CO«Tipi/ler 
controis 


10816  Northridge  Square 
Cupertino.  CA9S014 
{408)253  8085  *^124 


n   FLEXIBILITY,  SECURITY  Remote 
conf  igurability  with  non  voiatile 
storage  oi  command  code&*  ID  and 
tali  messages,  tone  characteristics. 
tiining,and  rnore 

□  QUICK.  EASY.  SECURE  AUTOPATCH 
Store /forward  patch  plus  two 
autodiaiers 

D  REXIBIE  UNKING  Supports 
s^fitliesized  remote  bases 

D    VOICE  RESPONSE  TELEMETRY 

Meter  readbacK  with  natural 
sounding  synthesized  speech  Jets 
you  monitor  your  site,  gives 
users  diagnostic  information 
about  their  signals 

D    SOUNDS  GREATr  Audio  processing 
with  delay  line  to  mute  squeich 
tail  and  tones 

n    GROWTH  POTENTIAL  Expandable, 
upgradable  to  preserve  your 
investment 

D    LOW  POWER  ...  EASY  TO 
IMTERFACE  . .   A^ID  MUCH. 
MUCK  MORE! 


Ca  It  or  write  for  detailed  specifications 
on  the  RC  650  Repeater  Controller. 


^See  ifSt  of  Adveriisers  on  pag^  t  U 


TSMagazine  •  June.  1982     125 


ANNOUNCING 


flF  PROOUCTS  announces  productur^n  of  S/B  wavetenglh  VHF 
telescopjng  gniemnas  tor  14J-U8  MHi  (2M),  152-174  MH7  and 
^SO-^JS  MHz  (1^'*).  TfiesE  new  antennas  are  inlendea  tor  use  on 
hand-held  and  base  slalion  iranisceivcrs.  The-v  are  available  with 
BWC  conneclof.  5/16-33  Mud.  or  PL-259  connector.  A  lelesc-Op- 
ing  brass  nickel-pfaled  nme  sectton  radiator  is  used  for  lighler 
wetgtit  and  le$5  RF  (u-nctions  itiani  previously  available  5f& 
wavelength  anler^nas  Maxfrnum  gain  13  acheived  by  Ihs  gom- 
tnnatmni  oi  a  base  sprmg  for  whip  prol^ction  and  a  tuned  match- 
ing network  for  minimum  VSWR  Mmpmum  2-meter  bandwrdth  for 
T.5:1  VSWR  is  3.5  MH2  Overali  length  wUh  BNC  tonnsclor  1$ 
44H  mclie$  niO.25  CMf  The  BNC  connecto-r  ^nd  5^5-32  stud 
models  are  ihiended  for  hand'held  Trafiscei^vef  iHTsl  use  and 
(he  PL-259  model  which  includes  a  type  ffifl359  nghj  angte  adap- 
tor IS  intended  for  dirpctt  rear  moummg  on  Ciaae^  siphon  irans- 
ceiver^.  Suggesled  fist  price  lof  ad  models  is  Stg95  the  inosl 
popular  of  whicN  are  listed  below 


PfH             DESCRIPTION  PfH 

191-200  2  M.5i'16-32  $iud  191-800 

191  2T4  2  M  eNC  connector  }9^3U 

191-2T9  2  M.  PL  259  connector  iSl-^tS 


ELECTRICAL 
SPECIFICATIONS 

Gi^int'Tel  %  4av'$li4liC9lit  6dbmiin 

BandwJEJtPN2Ml   1  4  1  VS^AfR  JlMHimin 

BindwJdtrwil  '•>  Mf.  1  5;  i  ^EWfl  iMHimir. 

MaKimum  pOwarlHT  mrjdaJBi  lOwalSs 

M*iirtnjBri  puwe-flPU  ?bB  mO!fei  30  W3t(5 


DESCRIPTION 

1 ' .  M   5/16  32  Blud 
1  '4  W   BNC  connector 
1  li  U.  PL -259  connector 


MECHANICAL 
SPECIFICATIONS 


Lang  I  h  «■.■  te  ndeftillM  i 
Laiigrri  ^xtendsdj  I  ''i  Uh 
Lei^glh  c<>lEa3pad|?MiJ 
L«A^|hr.DJliJpQd|IS^ 
W«lQ!hl 


SPECiALlZIMG  m  PORTABLE.  FiJCED  STATION  AND  TEST  EOUIP'WBNT  ANTENMAS 

Orders  faclory^ direct  are  poslage  prepaid  in  ioritihiflrtlal  U  S 

OEALER  ItJQUIftlES  IMVITED 


RF  PRODUCTS 


*^  138 


P.O.BOX    33,  ROCKLEDGE,   FL32955    (305)631-0775 


1900  -  2500  MHZ    KITS 


$19.93 


'V 


$19.95 


"V 


'        PJtf-MHi£PAffP 

soiPiRnowii> 

2    HFPiOMS 

6    CmP€APS*LARW 

i    RISISJQRS 

^    PRiPAi/tBP  COfiSt 
fACURV  WOi^HP 

SUPPiY  CABWifS 

AivMfMtm  £4tfHrf  fftflftCMft  IP  lit 

«  mrx  tvffi  r  Kit.. ,  tffi 

MAm¥ACWR€d 

CABU  Sirs 


rsn,  rntt  tfi, 9Js.w$ 


33    WASHERS 
32    SPACiRS 
/    3fQaJR$J> 

2  mrs 

I  i'-PVCPiPi 

2  4**iHD€APS 

1  MOf/NTifiG  BAR 

/  ""rCONNiCTaR 

;  mTAHPBOiT 


Disc^mis 

i  f9  *........ Hit 

/■  rt  If.. jf» 

iS  fi'tt,^. J  J* 

t*     Ittt, „r--f** 

t*»  r*  tff, ,„ JJK 

jpi«#  ifp. '##ja 

»fffiMii(TtitSt4M  #*/  $f  4tft* 


powiR  Sf^pptym 

Sf9JS 


SCARP 
/    POmR  TRAHSf. 
t    3  !  7i  APJUSlASli 
RiCULAtQR 

;    flKi  WH!HG  POT. 
WnhSWiTCH 

COARSE  rmiHS  PQl 

Kmss 

^r  comEcTORs 

4  POWER  PfaPES 

t  RE  CHORE 

3  RESiSrORS 

3  B/SRCAPS. 

/  ICOQ  MfP  CAP. 

/    PPPT MiRi  TOCCIE 
SWITCH 

I    iEPWIJHHOlMR 


MAIL  ORDERS 
ADD  $5.00  FOR  SHIPPING  AND  HANDLING.    TRIONYX  IND.  INC. 
INDIANA  fiESIOENTS  ADO  4%  SALES  TAX.    6219   COFFMAN  RD. 

INDIANAPOLIS.  IND. 

46  2  68       *^104 

(317)  291-7280 

(317)  291-2995 


Have  you  tried  it  yet? 

ATV  TRANSMiTTER/CONVBRTER 

•10  Watts  Output 
^Standard  Frequencies  Available 
•Broadcast  Standard  Sound 
•High-resotution  &  color  video 
^Regulated  AC  Supply  Built  In 
TC^I  ^Tuneable  Downconverter  &  Preamp 

Connect  to  the  antenna  terminals  of  any  TV  set,  add  a  good 
450  MHz  antenna,  a  camera  and  there  you  are. .  .Show  the 
shack,  home  movies,  computer  games,  video  tapes,  etc. 

ATV  DOWNCONVERTER 

For  those  who  want  to  see  the  ATV  action 
before  they  commit  to  a  complete  stetlort, 
the  TVC-4  is  for  you.  Greal  for  public  ser- 
vice setups^  ctemos,  and  getting  a  buddy 
interested.  Just  add  an  antenna  and  a  TV 
settLrnedtoCH.2,3.0T4andpiuq  lnto1l7  Ti#jni 

voiisa.c.    $89.00  TVC-4 

TVC'4L  extra  tow-noise  version.  .  .$105  deliveretS in  USA 

HOMEBfiEWERS;  ASK  FOR  OUR  BASIC  FOUR-MODULE  PACKAGE 

CALL  OR  WmiE  FOR  OUR  COMPLETE  LIST  OF  SPECIFICATIONS,  stelion  set- 
up diagrams,  and  optional  accessories  which  include  antennas,  modulaicrs, 
detectors,  test  gerterators,  cameras,  etc.  WE  ARE  A  FULL-LINE  SUPPLIER  OF 
ALL  YOUR  ATV  NEEDS. 

TEflMS:  VISA  or  MASTER  CARD  by  telephor>e  cr  mail,  or  check  of  money  ord^f  by 
malL  All  prices  are  deltver&d  in  USA.  Allow  three  weeks  alter  order  fordeflvery. 


P.C.  ELECTRONICS    2522  Paxson  Lane, 


Tom  W60R0     Mirvinn  WtSYSS 


Arcadia,  California  91006 


PORMBLE 


/VIODEL 
370-10 


BW 


Designed  for 

APARTMENTS  —  MOTELS  ~  VACATIONS 
Quick  Simple  Installatioa  Operates  on  2, 6. 
10. 15. 20  and  40  meters.  Ai!  colls  supplied. 
Only  22-1/2  inches  long.  Waghs  less  than 
2  lbs.  Supplied  with  10  ft  RG  58  coax  and 
counter  poise.  Whip  extends  to  57  inches. 
Handles  up  to  300  v^atts. 

VSVVR — 1,1:1  when  tuned 

Wffte  for  more  details  and  other  B&VV  products 

BARKER  S^  WTLUAMSON.  INC. 
ID  CANAL  STREET 
BRISTOL  FW.  1sf007 
215-7Be-55S1  ^11 


H 


126     73Magazine  •  June,  1982 


RIN60 
RAN6ERII 

7dB  GAIN 

HIGHEST  GAIN 
2  METER  OMNI 

OUTPERFORMS 
CONE  AND 
DOUBLE  ZEPP 

WORK  MORE  STATIONS 

ELIMINATE  NOISE 

LiGHTNING  PROTECTED 

ACCESS  MORE  REPEATERS 

ASSEMBLE  EASILY 

INSTALL  QUICKLY 

A  COMPLETE  ANTENNA 
ALL  PARTS  INCLUDED 

600,000  HAPPY  USERS 
BECOME  ONE  TODAY 

ARX-2B  134-164MHZ 
ARX-220B  220-225MHZ 

ARX-450B  435-450MHZ 


MORE  RANGE 

3  dB  GAIN 

5/8  XSTA1NLESS  WHIP 

GRIP  TIGHT  90LB 
MAGNET 

CHROME  PLATED  BASE 

NEAT  APPEARANCE 

THUMB  LOCK  ADJUSTMENT 

NOWHIPCUniNG 

LOW  PRICE 

MAGNETIC  MOUNTS 
AMS'147     146-148  MHz 
AMS-220     220-225  MHz 

TRUNK  LIP  MOUNTS 
ATS-147     146-148  MHz 
ATS-220    220-225  MHz 


BUY  FROM  YOUR  DEALER 


CORPORAflON 

THE  ANTENNA  COMPANY 

48  Perimeter  Road,  P.O.  Box  4680 
Manchester,  NH  03108 
Telex  -  953050  ^  106 


INTRODUCINIl  OUR 

M  DS-AM  ATE  U  R  -  ETV 

32  ELEMENT 
YAGI  ANTENNA 


•    (SJOT  A  KIT 
•  1.9^2.5  GHz      •  3834"  LENGTH 
23  dB  AVERAGE  GAIN 
DIE  CAST  WATERPROOF  HOUSING 
FOR  ELECTRONIC  CIRCUITRY 

•  COMMERCIAL  GRADE 

•  INCLUDES  MOUNTING  HARDWARE 
MAE-1  32  Element  YAGI  Antenna  . . .  $1 9.95 


SIND-1  VIDEO  CONVERTCR 


FOR  CABIE  TV 


The    SWO-1    Video 

Converter  is  utjiizfld 
on  cable  TV  sys- 
terns  to  remove 
the  KHi's  signal 
from  ^  distorted 
vtdflo  (channel 
3  ►n/out)  and 
also  P5S5  tin  ru 
the  normal 
undtstorted/ 
detected  audio  signal. 
Rocker  swi:tch  selects  oper- 
ating mode  to  remove  KHss  distor- 
tion from  ths  video  or  pass  all  other 
channals  normally.  Simple  to  assemble— less  than  30 
mmutes,  Pre-iuned,  Input/output  Channel  3.  Impedance 
TB  ohms.  n7VAC. 
SWD-1  Video  Converter  Kit 


.  $69.95 


VTR  ACCESSORIES 


SIMPLE  SIMON  VIDEO 

STABILIZER 


■  ^  ^  ^ 


Model 
VS-125 


Simple  Sfmon  Video  Stabilizer,  Model  VS'12E.  Btiminatas  the 
V^  rt^  ea  I  rolJ  s  nd  j  itter  from ' '  copy  ^  u  Bed"  v  i  dec  ta  p  es  w  h  en  pi  ay  in  g 
through  large  scfs en  projactors  or  on  anotherVTfl.  Simple  to  use^ 
just  adjust  Ihe  Socfi  control  for  a  stable  picture.  Once  the  control  is 
set,  the  tape  will  play  aJt  the  way  through  without  further 
■adjustmenls.  l^iCf^c^e■s  12V  power  supply. 
VS-125  VJdoo  Stabitizer  wired .,..-. §54.95 

SIMPLE  SIMON  VIDEO 

SWITCHING  BOX 

Model  VSB-300 
The 

Affordable 
Video 
Control  Center! 

EsceMent  In  isolation'  and  no  loss  routing  sytem,  Simple  Simons 
VSB-300  Video  Syvitching  Bok  arables  you  to  bring  a  variety  of 
video  components  together  for  easy  viewing/rfubbing.  Also  you 
gainthesbi-ll-ty  to  recordone  channel  while  viewing  another  Urtrt 
includes  two  F-type  quick  connector  ended  cables, 
VSB-300  Video  Switching  Box  wifed , .  -  SI 9.95 


SIMPLE  SIMON  ELECTRONIC  KITS,  Inc. 

7  +  11  SWD  PARTS  KITS 


MITSUMI 

VAR ACTOR 
UHF  TUNER 

Model  UES-ASeF 


$34.95 

Freq.  Range  UHF4.70  -  EBSMHz 

Anlefina  Input  75  ohms 
C^Bn^Efe  14-83  Ouiput  Ctiaiml  3 


KIT 


ptttrt 

NO 


DEScniFTioN  mic£ 

f   VT1-SW     Vaiactsf  OHFTuftii.  ModfllUES-A5&F  ^HM 

2  Cfll-SW     Pfinled  CircuH  Botfrt.  fffl-Dnllsd    ....       ,    .  .  .  .  IB.95 

3  TP7-SW     P.C.fl.  PotErrtiGPneter*.  1-2 OK.  1-lJC.  and 

5-1  OK  uhms.  7-pistfi£. .  .    &-9S 

4  Ffl35-SW    RHistw  Kit.  ^  Watt.  5*t  Ca*on  filcn,  32-piiCK.  .  .•*.9& 

5  PT1-SW     Pflvuer  TpaflstormoT.  Pfll-IITVAC.  Ste-24VAC 

Z^Qma S.9fi 

B    PP2-SW     Pinfif  Hcmiit  PatBJitiomiBtflrs  and  KniJbs.  MKBT 

M/\  1-5KAT  w/Switch .  5.8S 

7    SS14-SW   ID'S  7-piis.  DiDdss  4-|ics,  Reifuigttti-fi  2-^^t 

Hfat  Sink  l-pieti  ,    , - .         .    3995 

a   CE9'SVV     ElKtfDlyik  CapiclDar  Kit.  S-pitiE^et t,9B 

S  CC33-SVV  Curimk  Dtsk  Capacitnr  Kil.  6Q  W,V,.  33-|>det:es .  .  .  .  7.9S 
10   CT-'SW       VlEtble  Cflis^tmic  tnmmBr  Cipcitw  Kit, 

5-Ei5p(d,  &-piBces S.95 

M    L4-SW        Coil  Kfl,  IBmlis  2 -pieces,  llpihi  1 -piece  (prewound 

inductors  f  and  1  T^T-IZ  Ferrilfl  Torrijid 

Coifl  wilh  3  ft.  ftf  #28  wire S.PO 

12  9CS-SW      LP   Sackats..  Tin  inla^,  B-pin  5-pi»ci£ 

3(uj  l4-pin  2-piBtBS 1-95 

13  SR-SW       Sp«aiier.  ^iC''  Dvai  and  Pmpunch&d 

Wood  EnolQsurB  . 14.B5 

14  M^SC-SW   iAiu.  P^ns  Kit  IiwMk  Hardware,  (B/J2.,  8/32 

fyuti,  b  Soltf],  HoDbp  Wire..  Anl.  TwiuSh  DMifT 

Aiit.  ^Mitch,  Fiisi,  Fiisdlohf^r,  elc t.95 

Whin  Ordering  All  lt«Ria,  \\  thru  14^,  Tolol  Pries  t3fl,9S 


UHF  ANTENNAS  and  ACCESSORIES 


ZYZZX 

VHF-UHF  WIDEBANO 

ANTENNA  AfflPUFIER 

MODEL  ALL-T 

50  MHz  —  900  n/IHz 

12  dB  GAIN-:0  5dB 

A  Revoluttonarv  Mew 

One  Stage  HYBRID 

IC  Broadband  Amplifier 

This  unit  is  not  available  anywhere  else  in  the  world,  One  unit 
serves  many  purposes  and  is  av&ilable  in  Kit  or  Assembled 
form.  Id  osl  for  outdoor  or  indoor  use.  Input-outpi^t  imped3<it*J 
iS  75  ohms.  Amplifier  includes  separate  co-ax  Feed  povter 
supply-  Easily  aj&embled  in  25  minutes.  No  coils,  capacitors 
etc.  to  tune  or  adjust. 

ALL-1  Ccimplete  Kit  with  power  supply S24  9S 

ALL-1  Wired  and  Tested  with  power  supply    ......  $34.96 

Our  New  STVA  M.5  dB  GAIN, 
14  ELEMENT  CORNER  REFLECTOR 
YAGI  ANTENNA 


**i^-;.^^^      STVA-3  yagiaitfermi 


%..^ 


14  5*,  75  ofim.  Chan  80-68      -  &nM 
STVA-4  ViqiAm«nna, 

H-BiB.75alwi,Chm44-B2        S1B.95 


$9Ja 


STV  A-1  ViQi  Antflfma.  1 1.5  dB,  75  ohm,  Chan.  42-54 


Rq-B9/tl  n  ohm  Iwt  Lass  CtMS  Caijte $  .12  ji/ft 

F-&9  CoSKl^L  CiiiHifictars,  sa.  '...>..: ,  , . ... «..  .<  r  - 39 

MM  Spersai  UMF  75-301}  ohm  Mafdi^  frartifofimt.  ea t4S 

ALt- 1  \mm  EC  Wkffihand  VHF-UHF-FM  AfllewH  A(riplifi*f  »5t  .  .  . .  24.95 

ftU-1  H  VB  FHD  IC  Wideband  VHF-UHF-FH  Ant  Amp.  Ass  wnblid       34.95 


Available  by  Mail  Order  Only  —  Sertd  Check  or  Money  Order  To: 


SIMPLE  SIMON  ELECTRONIC  KITS,  Inc. 

Calif.  Orders^  All  Other  Orders: 

3S71  S.  Vaiiey  View,  Dept  7  1 1850  S.  Hawtfiome  Blvd.  Dept7 

Las  Vegas.  Nevada  89103  Hawrthome,  Calif.  90250 

Tel:  (702)  322-5273  Teh  (213)  675-3347 


Miniinum  Order:  $16.96,  Add  10%  Shipping 
and  Handling  orv  orders  under  $40,00.  For 
orders  o^er  $40.00,  add  5%.  Mirtimum  Ship- 
ping and  Handimg  $5.00  Catalog  $1.00. 
—  VISA  and  Mastercard  Acceptable  — 


^See  if  St  of  Advertisers  on  page  114 


73Msgaiine  *  Jurte,  1982     127 


CALL  NUMBER  ONE! 


CARLOAD  INVENTORIES  •  ROCK  BOTTOM  PRICES 

SUPER-FAST  SERVICE 


UNES:    AEA 

AVANK 

ASTRON 

ALUAtiCE 


ALPHA 
BEARCAT 
BIRD 
BENCHER 


CUSHCRAFT 
COLLINS 
CDE 
DflAKf 


DEKTRDN 
HY  GAIN 
HUSTLER 
ICOM 


KANTRDNICS 
KLW 

KEKWOOD 
MICROLOG 


MINI-PRODUCTS 
mn  GAIN 
MIRAGE 
MFJ 


PALO  WAR  ENG 

REGENCY 

SWAN 


TEN  TEC 
UNIVERSAL 
UNARCO^ROHN 
VIBRGPLEX 


*.m 


CALL  TOLL  FREE  1-800-325-3609 

MIDCOM  ELECTRONICS   •    8516  MANCHESTER  ROAD   •    BRENT 


if\^        IN  MISSOURI 

IU9    314-961-9990 

BRENTWOOD,  MO  63t44 


w*fc 


^  52 


The  FIST  FIGHTER  "* 

•  Send  Perfectly-Timed  Code 

•  Perfea  1 :3  dot:dash  ratio  all  the  time 

-  Normal  key-down  tune-up,  no  switch  needed 

•  Exclusively  for  straight  keys 
•Side-tone  Oscillator 

•  Uses  CMOS  Digital  Circuits 
•Grid  or  direct  keying 
■3to30+ WPM 


Assemdied  ^nd  Tested  79.95 

Kh  59.95 

Shipping  and  H^ncfrir>g  2.50 

VISA  and  MasterCard  accepted 
Virginia  j-esidents  add  4%  sak^  t^x 


Blacksburg  Group 

Box  242 

Blacksburg,  Virginia  24060 

703/95 1  -9030 


(^na 


\': 


Jf 


^ij^A 


CALL  TOLL  FREE 
1  -800-238-61 68 


In  TN.  call  901-683-9125 

MEMPHIS  AMATEUR 
ELECTRONICS 

(Formerly-GermantownSefe-Rose) 

Authorized  Dealer  for  Kenwood,  Yaesu,  Icom, 
Drake,  Mirage,  A E A,  Info-Tech,  Ten-Tec,  MFJ, 
Cubic,  and  B&W. 


MON-FRI  9:00—5:00 
SAT  9:00—12:00 


1^139 


Write:  1465  Wells  Stat.  Rd.,  Memphis,  Tn.  38108 


HIGH  PERFORMANCE 
PRESELECTORS 


MODEL  P50  to  P500 


•  50  -  500  MHz 

•  Ultimate  rejectian  over  80  d8 

•  Five  large  helical  resonators 

•  Lew  noise 

•  High  {overload  resistance 

•  Tvpof  rejection  figures: 

±600  kHz  at  T44  MHz:  -30  dB 
±1.6  MHz  at  220  MHz:  -40  ctB 
±5  MHz  at  450  MHz:  -45  dB 

•  The  soiutian  to  interference,  intermotf  and 
desens  prat]lems  on  repeaters 

■  12V  DC  operation 

•  Dimensions  only  1^6  x  2.6  x  4.75  exclud- 
ing ponnectors 

•  Custom  tuned  to  your  frequency 

•  Low  cost  —  only  $69.95 

•  Allow  $2,00  for  shipping  and  handling 

We  liave  a  complete  line  of  transmitter  and  retetv- 
er  strips  and  synlhesizers  for  Amat&ur  and  corn- 
m&rcial  use.  Wfite  or  call  for  ouj"  free  catalog. 

We  welcDme  MasterCard  or  VISA 

GLB  ELECTRONICS 


V 


1952  Clinton  St.,  Buffalo,  N.  Y.  14206 
^143      1-(716)824-7936,9to4 


110VAC    MUFFIN  FAN 

cooling  farv  -  SLJitable  for  elect rontci' 
el€Crriqal  equipm^nl  cgoJing,  3200 
RPMMOO  CFM,  PlastfC  conslrucCnQn. 
Ouietrunnmg.4-nM6" square  x  ^■^Q" 
iUiCk,  3  bf^de  fan  Remuveo  if  am  used 
equip ment,.  checked    out    and    guaf- 

3BLADE— iS.OO  S  BLADE— $T.OO 

10 BLADE— MOO  3.13-  Sq.— 17.50 


AN/LJRM250  SfGNAL  GENERATOR  covering  10  KHz 
to  50  MHz  in  eighl  bands,  flF  oulpul:  0.1  to  100,000  uv 
in  50  ohm  load;  2  voiJs  adpustabae  across  H^^h  load  im- 
pedance AmpiiilLide  mocfujatjon:  0  to  50%  400  or  1000 
Hz  internal.  Wilh  1  MHz  crystal  calibrator.  Power  re- 
quired: 116  VAC  50-1000  Hz,  11  ^^^ 
M  LBS  Us«d.  reparable,  less 
wiaccessones  S75,W 


*  X  14x  10  Vj;  SH  WT 
accessories.  S5&.00, 


HEAT  SENSOR  ELEMENT 


Manulaclured  by  Etmwood,  Opens 
3T  SOOT.  Excel  tent  (or  building: 
heat  &  iirs  alarms.  5fB"  dia.  x 
1102"  deep,  3/e"  tabs  lor  push  or 
terminals.  \5!WCAoC  mounting. 


SG-l2.fURlV|.4a  FM  SIGNAL  GENERATOR,  19.5  lo  102 
MHz  FM  in  five  bands  with  devFation  ranges  0  !o  26,  50^ 
anct  100  KHz;  tDOO  Hz  modulation.  Al^o  if  oulpulsort 
1  4,  2-5 15,  J.eS,  2 SB,  4.3,  A. 45,  &.0,  5.35,  15  MHz,  p(us 
two  spaie  positions  Calibrated  out  put  voltages:  0.5  uv 
to  .01  yolls  (RF);  0.5  uv  lo  1.0  v  (IF),  output  impedances: 
10  ohms  (RF):  25  ohms  (IF).  V^ith  t  MHz  and^or  2  MH? 
crystal  ealibiatOT  markers.  Powder  required:  1 15^230 
VAC  50-1000  Hj.  Size:  12  >(  tS  x  12:  Shpg  Wl:  85  LSS. 
Used,  repafabtp,  $100.00 


STANDARD  SELL  &  CHIME  TRANSFOf^MERS  Made 
to  exacliy  replace  The  very  popular  types  nrtost  com- 
monly lound  in  homes  around  th^  nalion.  It  laHes  jusi 
minutes  lo  replace  a  bufned  oul  oriit— and  M  can  save 
you  Ciig  money  in  electriciarhS  charges  These  are  UL 
approved  tor  long  life. 
|.12iaVAC     S3.95 


ELECTRONICTOWN  INC. 

440-7lh  AVE.      BOX  204$    SAN  PIEGO,  CA  92112 
*^  ^  TS  w«£t  Coast  Oi¥.  Phone:  (714^  234  9871 


j^See  List  of  AdverffSBrs  on  page  t  t4 


1 


Limited  Offer. .. 


SUPER  STICK  11 

2  METER  5/8  WAVE  TELESCOPIC  ANTENNA 

PLUS 

A  DUCK  FOR 
UNDER  A  BUCK 


M9 


99 


+  10 


FOR  THE  DUCK 


SUPER 

STICK 

n 

PRICE 

GAIN  • 

BASE 
CONNECTOR  ** 

FULLY 
COLLAPSED 

$19.^^ 

6-9  DB 

BNC'Tempo 

5/15-32 
TNC-F--50239    , 

Co  apsed  is  a 
matched  1/4 
Wave  Antenna 

BRAND 
C 

S26>* 

6-9  DB 

BNC  ONLY 

■  •  ■  ■     I.  :^ .:-  .J  :■  •'  :  ;•  '•  ■■■  "■ 

NA 

Will  oo!  tfansTTTit 

in  <iollapS;ed  posstion. 

BRAND 
V 

$24.^'' 

5-8  DB 

■  •   ■;■    ■:■■■  ■^ 

BNC  ONLY 

NA 

Will  not  transmit-  ^^■■ 

■  Measured  Field  Strength  Over  Rubber  Duck 
''■  Specify  Base  Type  BNC,  Ternpo,  EgL 


I^D2S 

Stubby 


The  Tuned  Antenna  Company  brings  you  the  Super  Stick  II 
for  those  fong  haufs  with  your  H.T>»  pfus  our  5/8  WaV^ 
Antenna  may  be  operated  coHapsed  with  the  same  operating 
characteristic  of  a  Rubber  Duck  Antenna  The  Super  Stick  H 
ii^  avaiiabte  )vith  Tempo  S-T  8NC-TNC-F'RL-259  Bases  at  a 
'price  that  Is  several  bucks  under  other  5/6„  Wave  Antennas, 
making  the  Super  Stick  II  the  best  buy  around  Soe  your  local 
dealer  for  stock.  Settle  for  nothing  less  than  a  Super  Stick  II. 

Term»:  C,O.D„  ctiecic  or  money  or^fer.  Please  add  $2.00 

for  first  enlenna  and  $t,DO  for  each  additional  anlenrta  1o  cover 

shipping  nnd  handl^r^g.  CaWiarnia  re^ldCfits  add  G%  sM&t  i&yt. 

FOR  DEALER  LOCATION 

OR  TO  ORDER  CALL: 

(714)  268-0720 


AMTENHA 
GO, 


73  Magazine  *  JuneJ962     129 


J 


^53 


ORDER 

TOLL 

FREE 


JUNE  VALUES 

1-800-36-4799 

ORDER  HOURS:  11   am  -  8  pm  M-F 

Closed  Tuesdays 
9  am  -  4  pm  Saturday 


Banus;  2%  Discount  lor  Pfepaid  Orders 
(Cashier  s  Check  or  Money  Order) 


KgJ' 

.V9i 

TEN^TEC  SPECIALS 
&1S  Argonaut  HF  XCVR 

52S  Argosy  HF  XCVR 

5B0  Delta  HF  XCVR    

546  OmniC  Hf  XCVR . 

TEN-TEC  Acc«ssoHe£ 
m  stock  at  discount  priccrs 


399 
439 

369 


9B 
00 
00 
00 


MJI^  PRDDUCTS  (Call  for  other  Mf  J  itemsf 

989  tMflw  3KW  Tunar .  2e7  75 

^62  1  &KW  Tuner  mtr/switch I99.9S 

949S  300  watt  d«luKfl  tur^sr 'i 22.00 

041  C  300  watt  tuner  switch/mtr 78.42 

340  300  watt  tuner  switch/ mtr 69.70 

4B49  Grandmaster  rrwrrrory  k«yer  12  msg.  121.72 

422  Pacesetter  Koyar  w/ Bencher  BV1  S7.1S 

4>0@  Didluxe  Keyer  wJth  ^pf^ed  mtr  .  69  69 

496  K^yboerd  II .  296  95 

752B  Dual  tunable  filter.  .    .      .    .    78  42 

SUPER  STICK  II  5/8  2m  art*     14.SS 


14  9S 

©9  95 

B2.95 

105  95 

CALL 

35.25/42  95 

99  95 

DAtWA/MCM 
CN  520/CM  540  Watt  Meters  , 
CNW4ie/CNWS18  Ant.  Tunars 
CNA  2002  Auto  2.6W  Tuner 


.S9.9S/e9 
169.95/279 
399 


ASTRON  POWtH  SUPPLIES  n3S  ^^C] 
RS7A  S  ampti  continuous,  7  amp  IC$ 
RS12A  9  amps  continuous,  12  amps  ICS  . 
RS20A  16  ernps  continiurDus,  20  amps  ICS 

RS20M  same  as  RS20A  +  maters  

RS35A  25  ampa  centinuQus.  35^  amp  ICS 

RS3&M  sem*  as  nS35A  +  maters  

VS35M  25  amp  continuous  adjustable  .  . 
VS20M  t€  amp  continuous  adjustable   , 

MINIQUAD  HQ-1 ,,^ 


48 

ea 

87 
105 
131 
15V 
171 
124 

129 


9S 
95 
9S 

60 
35 
20 
50 
95 
95 
00 
00 

95 


VoC  0  M  ANTENNA  S/2  m  Amps 

5/8  wave  2m  band  bald  Ant    .  .  . 

2  watts  fn,  25  watts  out  2vr%  Amp 

200  mw  in,  25  watts  oul  2m  Arnp. 

1  watts  in,  50  watts  out  2m  Amp 
MIRAGE  AMPS  ft  WATT  METERS 

MP1/MP2  Watt  Meters 

2mArrfps  B23.   B1016.  ST  OS    B30T6 

ilHF  Amp  01  01  ON 
BfNCHER  PADDLES  Black/Chrome 
BUTTERNUT  NEWf  HF6V  1Q-80m  Verttca I 

SUPER  SPECIALS 

fikBfii.  IsQipole  Ant,  Kayers.  Co(Je  Readers  CALL 
ROTOR  SPECIALS 

(When  purchased  with  CushcrafL  HyGain.  KLM, 
Mosley  or  Hustlaf  Tribsrr^d  Beam] 

ALLIANCE  HP73 ©9  95 

COE  Ham  IV        .       ,         .  165.95 

AZDEN  PCS  300  bandhatd.  2m                   ,  284.00 

PCS  3O0O  2m  XCVR  2S4  00 

MOSLEY  Antennas .  CALL 

TOKYO  Hy  Power  2m  Amps  CALL 

SANTEC  S7-7/7  440-450  bandheEd  239. OO 
^£tVSANTEC2m&440MH?h/hBlds             Caltforquotas 

KDK  FM  2025A  25  watt  FM  XCVR           .  .  269  95 


BfG  DISCOUNTS 

KENWOOD.   ICOM.  YAESU,  AZDEN,   KDK.  DENTRON 
—  Call  for  otir  ciuote  — 


HY-GAIN  ANTENNAS  CALL  FOR  QUOTES 

NEWf  TH7DX  Triband  Beam  NOW  IN  STOCK! 

Upgrade  kits  for  TH6DXX  to  TH7DX    Most  antennas 

now  with  stainless  hardware. 

HV'GAIN  ANTENNA/TOWER  PKGS CALL 


CUSHCRAFT  |;other  antennas  in  stock} 
A4  New  Triband  Beam  10  15  20m 
A3  New  Triband  Beam  10- IS- 30m 
A V3  New  10  15  20m  Vertical, 
ARX  2B  New  Ringo  Ranger  2m 
A32-19  2m  '  eotsme/"  DX  Beam 
220 B  220  MHz     Boomer 
214B  Jf    Boomer  144T46  MHz 
2T4FB  Jr    Boomer  T44. 5-148  MH? 
A147~1 1  IIEiement  2m  . 


204.00 
164  00 
41  50 
33.95 
75.95 
6895 
$1.95 
61  95 
3460 


22 


MIC 

Imp.  mic 


TELEX  HEADSETS-HEADPHONES 

C12)0/C1 320  Headphones 

PROCDM  200  Headset/ dual  Imp 
PROCOM  300  It/wt  Headset/dya1 

CABLE  RG21  3  Mil  Spec.  .... 

fiG8/U  Foam  95%  Shiefd 

fl  wire  Rotor  2  # IB.  6  #22        

KLM  ANTENNAS  (other  antennas  m  stock) 

K'n54A  4-Eiem(^nt  Tribsnd  Beam  

KT34XA  6- Element  Triband  Beam 

144  14$  13  LB  2m  13EI*m   wfth  baEun 
t44-148  16C  2m  16-6lem   for  oscar 
420  4B0  14  420-450  MHi  14  elem.  beam 
420-450  iaC42O-450  MHz  TS-elem    oscer. 
432  16La  16  «*lBm  430^434 MHi  beam/baiun 

HUSTLER  58TV  lO-BOm  Vertical. . . 

4BTV  10'40m  Vertical 

3TBA  New  I0'16'20m  Beam  .... 
HF  Mobile  Restjnators  Standard 

10  and  15  meter  8.95 

20  meters  1 1 .95 

40  maters  13.95 

75  meters  14.50 

AVANTI  AP  151  3G  2m  on  glass  ant  .  .  , 27.95 


95/32.95 

77  SO 

..    69.95 

.  .26C/fi 

24C/fi 

.  16c/ft 

,  314  95 
469  95 
77.95 
93.55 
37  54 
.  58  70 
60.70 

99  95 
789B 
168  95 
Super 
13.50 
15.95 
18  50 
28,95 


ORDER  INFORMATION 


Orders: 

Information 

and  Virginia  Orders: 

Store  Hours; 


1-800-336-4799    Mailing  Address:  2410  Dreatel  St. 
(703)  643-1 063  Woodbridge.  VA  221 92 


M-W-F:  12  noon-8  pm    _  ,  -^*-r^.^  r^... 

Thursday:  10  am-4  pm    ®'^^^  L^c^atian;     4415  Jefferson  Davis  H^y. 
Saturday:  S  am-3  pm  Woodbridge.  VA  22191 


—  CALL  FOR  QUOTES  — 
Send  stamp  for  a  flyer.  Terms:  Prices  do  not  m- 
clude  shipping.  VISA  and  Master  Charge  ac- 
cepted. 2%  discount  for  prepaid  orders ( cashless 
check  or  money  order),  COD  fee  $2,00  per 
order.  Prices  subject  to  change  without  notice 
or  obfigation. 


DOLLAR  SAVER/SPACE  SAVER 

WELZ  SP-300  SWR  &  POWER  METER 

1.8  to  500  MHZ/1  W  to  1  KW 


WELZ  IS^ 


■.'PQW't*  IVIVH 


Exclusive  cross  over  frequency  range 

3  TransmitLer/S  Antenna  Connectors, 

One  SWR/Power  for  Ihe  seriou*.  amateur  who  operates  all  bands,  HF 

to  450  MHz 

ONLY  $196.50 

SeTious  Dealers  Listing  Available. 


PU,i^B.  cz:l 


1275  N.  Grove  St, 

Anaheim,  Cal.  92806 

(714)  630-4541 

NOTE:  Price,  Specifications  subject  to  change  without  notice  and 
obhgarion. 


A  HAM  RADIO  PROGR^\iM  FOR 
THE  APPLE'  COMPUTER 
by  Fred  Pearl  man  W(*DLM 

BASH  DOKS  IT  AGAIN,  .  . 
ON  DISC,  WITH  DOCUMENTATION  Hi 
Computerize  your  DX  operaticm^i.  Speed  up  and  simplify 
your  DXCC  effort?*,  l/Ocate  any  of  the  318  approved  coun- 
tries by  name,  number  or  prefix.  .  .and  find  out  if  you've 
worked  it.  .  .with  the  callsign,  band,  date,  time,  heading 
and  distance— displayed  in.stanlly,  DX-PE^DITER'S  memory 
contains  all  the  info  you  need.  ENTER  AND  UPDATE  new 
and  pertinent  information  as  Lo  country  status  and  how  and 
wlien  you  worked  il .  .  .  and  much  more. 


^Now  Availahk-  al  Ytmr  Dealer) 

If  ordering  direct:  Retail  S29.9B,  Add  S2. 00  shipping/handling 
California  residents,  please  add  $1.95  Sales  Tax 


BASH  EDUCATIONAL  SERVICES,  II\IC. 

P.O,  Box  2115    San  leandm,  CA  94577 

(4 1 5j  352^5420 


>^ 


130     73  Magazine  •  June,  1982 


WtRE  AMD  CABLE 

f%C  311 

37C/M 

HG  aL>  #qam,  W%  braid 

23.54 /rt 

ftG  «X  foam.  95***  braid 

U  h<  n 

RG  59  m>l  spec 

n.Si^t 

ftG  nu             

19C/tf 

ASOorvm  ladd^  iprie.  lOOtt  roit 

$10.75 

1  conductor  rotof  cable 

15c /^t 

UG4   Stranded  Copper                    (SOtt. 

JTILlIt  J  SC/'tt 

13  Ga  Soi'dCopp^rweld                 (50ff^ 

multJSC/*t 

UOd  SotrdCo|>per«eid                  ($0*1. 

muiT.>#c/H 

IG*  Solid  Aluminum                        4 SOU 

rtiglt  )6C^t 

ANTENNA  ACCESSORIES 

Ceramic  Do^&one  insulators 

65C^ea 

Amp^e<iol  Silver  Plate  PL  IS* 

75c ^ea 

W2AU  Balun  1    lor  J:1 

tU  25 

VAN  GOROEN  11  Baljn 

S8.J0 

VAN  GORDEN  ):1  Center  \mv\ 

$5.50 

BiW  Traps  &0/<0m  thru  10m 

$25.65/pr 

Qa.W  37Sor  376  Coax  Switch 

t19.25 

BS.W  593  Coax  Switch 

11795 

BiW  SflS  Coax  Switch 

$22  50 

ftOTORS 

CDEAR13 

«51  45 

COE  CD  45 

1*2  55 

CDENAM4 

S170.KI 

CDE  TAILTWISTER 

Sa3i.2S 

ANTENNAS 

MINI  PRODUCTS  Mini  Quad 

1177*5 

MINI  PRODUCTS  CiVef; 

$55  00 

aUTT€RNUTHF6V 

$99  50 

QUTTERNUT2MCV 

S2a.50 

HY  GAIN                                                 CaN  or  write  for     1 

HUSTLER                                       big  discount  price    | 

SHURE  144D  DUAL  IMP   MIC   ^ 

.  .  $45-95     1 

BEMCHER  PADDLES,  bfack/cfrirome i35.00/4275    | 

LARSON  LM  150  MM          ... 

,  ,  .  .  ,  $15.00 

VOCOM  5/e2MTR  HT  ANT 

15.95 

VOCOM  2  m  25  OUT  7  MTR  AMP 

S9.75 

VOCOM3IN50OUT?MTR  AMP    ,  .  . 

103,95 

POCKET  POWER 

<  .  .  .  .  175.55 

SHIPPING  CHARGES  ADDITIONAL 

,  PARESi 

DENTS  INCLUDE  A=o  SALES   TAX 

MC/VISA. 

PREPAY     BV    CERT     CHECK    OR 

MO    AND 

TAKE    A    2««    DISCOUNT    OFF     THE    ABOVE      1 

PRICES    PRICES  SUBJECT  TO  CHANGE                1 

PlEUEStftDFOR  H^tWft 

LACUE  COMMUmCATIONS,                  | 

ELECTRONICS 

1 

109  V^}e  St    •    Jf"-     ^   -n  PA  ^*i9Q2           •^*        1 

)i14I&3ft-5»0 

1 

«OOftSMl¥ThlOl.J»**Tuir  lOWIt                                1 

I                                                                      ^Tlfit'-* 

1 

^4^1 


COMPONENTS 

D  Amphenol  connectors 
n  B&Wco*is,  switches,  aniennas 
D  Hammond  and  LMB  enclosures 
D  Jackson  diafs  and  drives 
n  J.W.  Miller  parts 
n  Knobs  and  shall  couplers 
n  Mrflen  components 
D  Multronics  roller  inductors 

□  Padders  and  trimmer  capacitors 
n  Resistors,  capacitors,  inductors 
n  Semiconductors 

n  Toroids.  cores,  beads,  baluns 

□  Transmitting/ Receiving  Capacitors 

Air  Variables    Cardwell-^E.F.  Johnson 

Hammarlund--Mmen 
Doorknob:  Cenfralab— Jennings 
Vacuum  Variables  Jennings 
Wire.  Cable,  Op€n-wire  Trans,  lifie 

KITS 

Fun-Amp  (73  5/82)  2  M  Converter  (73  4/82) 
R-K  Maise  Badge  (hr  2/77)  40  meter 
QRP  Transceiver  (hr  1  /81 )  L  Meter 
(OST  1/81 )  General  Coverage  Reception 
with  Drake  R  4C  Receiver  {OST  5/81 ) 
Fun-Mitter  (73  2/81 )  FunCeiver  (73  7/81 ) 
Fun  Oscillator  (73  2/82)  Solid  State 
T-R  Switch  (hr  6/80)  Multipurpose  UHF 
Oscillator  (hr  9/81 )  Split  Band  Speech 
Processor  (hr  9/79)  SWR  Meter  (hr  10/81} 

1982  Caialog  50  cents 

RADiamr 


PHASE  il 

TWIN  ANTENNA 


^>fO^ 


L 


8ox  411 S.  Greenville.  NHD3048 
(603)878-1033 


4Si 


•  SUPEHBO  K}tiND  too  MPH  GRAY  MAO- 
HillC  MQUKT  WITH  WVLAfl  BASE 

•  SfB  WAVE  FOR  PHASE  II  SIGNAL 

'  AND  * 
»  IM    VVAVE   FOR   CLDSMN   AND   RE- 
STRftirED  HEIGHT  AREAS 

•  I^StANT  CHANGE- OVtfl 

•  SUPERIOR  PERFORMANCE 

•  STAINLESS  STEEt  S^RFNG  AhTf)  WHIP 

•  CHROME  OK  BRASS  aASI  POMPAFIE' 

■  eOTM    AMTENIIAS    Aftf     rhiuuiHQf 
AOIUSTA&LE 

•  C0Hf1-ETE   mm  17  Ftfl   Of  R}AM 
CaAE  AMD  n^^&9  COMMECTOIt 

•  MAQ£  IN  ySA 

INTRODUCTORY  PRICE: 

$29.95 


I 


ii.W.ti*iiijtM*!**»N' 


COMPARE?* 


TWO  ANTENNAS  FOR  THE  PRICE  OFOISia 
ARATEUn-WHOiESALE  ELECTRONICS 

881?  SW  I29tn  ferrate,  Mtami  Floiid^331?e 

Tolephonffj305>  233 '3631  -  TbI&x  60-3356 

HOURS    9  '  5  Mofioav  tfifu  Friday 

•  US  DJSIftiauTOfl*  DEAlEfl  INQUIRIES  INVITED 


■dvitfi  LHAfgt- 


ORDER  NOW  TOLL 


800-327-3102 


*$249, 


A  modufar  approach.  . 
system ....  Here's  how 


FAST 
SCAN 

for  your  own  custom-designed  ATV 

TXAS^4ATVEXCITEH^MODULAT0f1.te9ppd 

TUiK  wlwO  and  [estect  nuiduto  iri  deeign^a  to  dfiva  itifl 
Motorola  MHW-710  mstlulii  In  Iho  PA5  10  M*ali  linuaf 
»mt>'  Thfi  crystal  ir  iNs  1Q0  'nHf  region  ^iesps  n^r. 
mon^cet  am  ot  two  ma!ti»  fof  laiih  back.  The  vidna 
modulator  la  lull  9  tntis  lot  computet  Qraphic^e  Bna  cah 
or  RpiTUirei  13  S  vd<  r»a  tp  7a  m«  Tuned  with  xiiil'<Qn 
«3i25.  *34[».  Of  4»25  mfil    PrOwsJon  lor  sync  ei 

(dndma  Two  rrequencies  available. 


PA5  10  WATT  ATV  POWER  MODULE  «9  ppd 

tlw  PA  J  *Ht  put  out  ID  Mi*lt«  muS  POM*  on  fn«  sync 
ti(M  nHiwn  dr<v«n  wrrh  90  m*  ov  irm  T)(AS  «icii«r  30 
OAffH  uft  jLnd  ouC  plus  £1000*113171  iof  irk*  *n-c4<  tundi 

vdc  ragvlAtna  m  J  amps 


'^»=  ■ 


PMAS  AUDIO  SUBCARHIER  GENERATOR 
-.. J29  p|>d 

Puis  audio  on  i«ii1li  roi^  c«m«ra  video  iitst  as  tKO«l 
caai  TV  rtots  st  *  5  m«r  ^!»  out  up  to  1  *■  p-p  10  ariw* 
inp  TXA5  or  VPri  2,  3,  or  4  modulalotSi  RequiMa  low  Z 
mic  (150  TO  600  oNfTiaii,  «nid  +  r?  lo  IB  wdc  <it  2b  ma 
Works  lAnMh  Any  crnilf  *ilPi  !i  mH;  t^rniJeo  bandwidth 

TVC-2  ATV  OOWNCONVERTER. . , .  155  ppd 

Slriplinig  MRF9ai  (1''^  cl&  NFf  ptmtn-i  ,i.id  douD^e  biN 
pncsd  mikst  module  digs  ou 9  tne'thegih  onets  bui  resists 
mlfrrmfidf,  and  overlosd-.  GQnnectB  twtwean  kjhf  antan 
na  and  TV  se1  tuned  to  channel  2  or  3  Varccai^  tunes 
<Z0  (0  4S0  mHf  Requires  +  1?  Id  ifl  *»dc  Q»  £0  m^ 
Suptr  Mnsit^vi;  TVQ  2L*iit!  ftfEi4%3&  p'aamp  j  Sdb  (4F| 
■lAO*      fiflppd 

*TXA5,  PAS,  FMA5  and  TVC  Basic  Modut«  Phg. 

Cil  or  w^il«  (Off  ouf  cofnpldt«  litt  of  s$>eciftcatiQfi5.  siaticm  set-up  diagram^  ^itd 
optional  accessories  which  include  a>ntennas.  modulators,  deieciofs,  i&st 
gefi^fato^s,  cajneras,  etc.  WE  ARE  A  FULL  LINE  SUPPLIER  OF  ALL  VOUR  ATV 

NEEDS. 

TERMS;  VISA  qr  MASTER  CARD  tiy  tUlephcme  or  mail  Of  thock  or  fnoney  oRlef  Dy 

mail,  AH  pfices  are  delivered  m  USA  Allow  three  weeks  artflf  Ofder  for  deli^^efy. 

(213)  447*4565  Charge  card  orders  only 


P.C.  ELECTRONICS    2522  Paxson  Une. 


Tom  weORG     Maryann  WB6YSS 


Arcadia,  California  91006 


miV  FAST  CHAKCE 

For  Vimr  Ifatfery  Packs 


RFCHARCE  YOUR  HAND  HELD 
RADIO  BATTERY  PACKS  TO 
FULL  CAPACITY  IN  AS  LITTLE  AS 
45  min.  EXAMPLE- FuMv  Charge 
ICOM  BPI  in  30  45  Minutes. 

&£PtRAIl  fUSH  PWOVIDIO  (%¥EJlNAUt  lOH 
4C.     AND    DC      OPIRATtOS  -BUILT     IN 

RF\niy      POLARI1I     PROTECTION 


ONE  UNIT  DOES  IT  ALL 
Charge,  ICOM,  VAESU, 
KENWOODp  TEMPO. 
SANTEC  and  Others  Auto- 
malkdllv  in  Your  Hptne, 
Car.  Boat,  R.V.  or  Airplane 
vvith  Built-in  Heavy  Duly 
Power  Suppi>  or  12  lo  24  V. 
External  DX,  SiipiiU  Such 
a&  Cigar  Lighter  in  Voyr  C«r. 


irll<k    CKiiH.*'  \%irj«u#r«  Rrtn^inini;  Ch#r|tf  Irt  Crih  CiMr^AftHi 
AjiiI  Tiufi*  On  Aulis-mjilMjIlt  ^Nrfi  H^tl**^  h  f  ylh  C>ur| 


rtJi-'-i 


■'■'an-HHUii 


INCLUUt^:  RviTK^vabb  &  Ft. 

Cord  lor  A.C  Ovttr^iiun  and 
2  Mating  Cc»iinrcl<>r«  ntr  DC. 
Jnpyl  drd  BiiUcrv  lead'l. 


H^fliRt^    Hif(h  Qualilv,  Cv^liim  Dc^ijtited  Hcavr  Cau^e  Alyminum  tjblnri 
fUlL  1  V«    WARRANTO  ON  PARIS  AND  WORKMANSHIP 


SBj9,oo 


ACCESSOR V  CONNECTOR  TO  fIT  tCOM 
BATTtRY  PACKS  BP-i,  BPJ.  BP4.  BP5.  S3 
PRf^PAID  0«l*tRi  JMCltD*    W  SHJPPlNt,  t,  HAlHOU^C 

PHONE    ORDERS-CAiL  1 2OT I  534-7059  or  12091  928-3608 


C4tlF    Itt^lDllVTS 
llMCLLtIt   b       TAl 


MAIL  PRE-PAID  ORDERS  TO: 


oestGN  J«C 


P,0.  BOX  4463      SONORA,  CALIF.  95370 

^  149  DEALER  INQUIRIES  INVITED 


*^See  List  of  AdverHsers  on  page^  1  f4 


73  Magazine  •  June,  1982    131 


d 


Wayne  Green  Books 


Xr^  ^ 

^aV 


TEKTEBTX 

a  cx)mpl8te 
worc^rocai^g 
system  In  kit 


A  WAYNE  GREKN 
FUBLlCATiaK 


^*^.m 


(b 


BuiliiMt  YcRir  Qwa 


*TRSn80  is  a  irad^rn^rk  or 

Radio  Shack  Dtvision  ot  T^raty  Cofp 


TEXTEDIT— A  Complete  Word  Processing  System  In  kit  form 

by  Irwin  Rappaport 

TEXTEDIT  is  an  inexpensive  word  processor  that  you  can  adapt  to  suit  your  needs, 
from  writing  form  letters  to  large  texts.  It  is  written  in  modules,  so  you  can  load  and 
use  only  those  portions  that  you  need.  Included  are  modules  that  perform: 
— right  justification 
—ASCII  upper/lowercase  conversion 
— one- key  phrase  entering 
^complete  edltonal  functions 
—and  much  more! 

TEXTEDIT  is  written  in  TRS-SO'  Disk  BASIC,  and  the  modules  are  documented  in  the 
author's  admirably  clear  tutorial  writing  style.  Not  only  does  Irwin  Rappaport  explain 
how  to  useTEXTEDiT;  he  also  explains  programming  techniques  implemented  in  the 
system. 

TEXTEDIT  is  an  inexpensive  word  processor  that  helps  you  learn  about  BASIC  pro- 
gramming, It  is  written  for  TRS-80  Models  I  and  lit  with  TRSDOS  2.2.'2.3  and  32K. 
*TRS-80  and  TRSDOS  are  trademarks  of  the  Radio  Shack  Division  of  Tandy  Corpora- 
tion. BK73B7  $9.97  ISBN  0-88006-050-6  Disk  Available  DS73S7  $19.97 

Annotated  BASIC— A  New  Technique  for  Neophytes, 

BASIC  programming  was  supposed  to  be  simple— a  beginner  s  programming 
language  which  was  so  near  to  EngtJsh  that  it  could  be  easily  understood.  But,  in  re- 
cent years.  BASIC  has  become  much  more  powerful  and  therefore  much  more  dif- 
ficult to  read  and  understand.  BASIC  simply  isn't  basic  anymore. 

Annotated  BASiC  explains  the  complexilies  of  modern  BASIC.  It  includes  com- 
plete TRS'80'  Level  II  BASIC  programs  that  you  can  use.  Each  program  is  annotated 
to  explain  in  st-jp-by-slep  fashion  ihe  workings  of  the  program.  Programs  are 
tfowcharled  to  assist  you  in  followmg  the  operational  sequence.  And — each  chapter 
includes  a  description  of  the  new  concepts  which  have  been  introduced. 

Annotated  BAStC  deals  with  the  hows  and  whys  ol  TRS-80  BASIC  programming. 
How  IS  a  program  put  together?  tVfty  is  it  written  that  way''  By  observing  the  pro- 
grams and  following  the  annotation*  you  can  develop  new  techniques  to  use  in  your 
own  programs— or  modify  commercial  programs  for  your  specific  use. 

Annot&tJMi  BASIC  Vohmi'  1  contains  Projecting  PtoUt%  Surveyor.  Thmgs  to  Do.  Tdi  St>eii6T   (ntroduclion  t' 
Digital  Logn'.  Camciot.  The  Souodex  Code.  DeduciJOn,  Op  Arfip.  Contcacfor  Cosl  E&lifnatina 
eK7384S10.95    ISBN  0^6006-026  X 

A/ifiOtAted  dASlC  ^oJume  Zconlains  Rouflh  Lumber  List,  Trip  M Usage.  Flieht  Plan.  OSCAR  Daia,  SWR/Ani&nna 
Design,  Superma^e,  Petals  Around  the  Rosy,  Numeric  Analysis,  Demons.  Atr  Raid.  Geography  Test,  Plumbing 
Systcrm  Design,  BK73S&  S10.95  ISBN  O-Baooe-037-9 

Order  Both  Votumes  and  Save!      BK738402  $18.95 
Kilobaud  Klassroom— 
A  practical  course  in  digital  electronics 

by  George  Young  and  Peter  Stark 

Learning  electronics  theory  without  practice  isn't  easy.  And  it  s  no  fun  lo  budd  an 
electronics  project  tfiat  you  canl  use.  Ktfobaud  Kfassfoom,  the  popular  series  first 
published  in  Kilobaud  Microcomputing^  combmes  theory  with  pracl*ce.  This  is  ^practi- 
cal course  m  digital  electronics.  It  starts  out  with  very  simple  eieclronics  projects,  and 
by  the  end  of  the  course.  you1l  construct  your  own  working  microcon^puler* 
Authors  Young  and  Stark  are  experienced  teachers,  and  their  approach  is  simple 
and  direct,  Whether  you're  learning  at  home  or  in  the  classroom,  this  book  pro- 
vides you  with  a  solid  background  in  electronics — and  you'll  own  a  computer  that 
you  buiit  yourself! 

Kilobaud  Klas3room  can^ams  Gelling  me  Ball  Rofting,  Gates  and  F1^D•Flops  Explained,  J.K  Fltp-Ftops  ant] 
Cfocked  Loa^c.  PC  Boards  and  Power  Supplies.  Hardware  Logkiral  Functions.  Voltage  Cuffent  and  Power  Sup 
pEies.  Transistors,  Diodes  and  OP  Amps,  Pulses  and  More  Pglses,  Counters  and  R6(ttstKr!>,  Bus  Traffic  Con 
tfol.  ROW  anct  RAM  Memories,  r^OCiri:uitrv.  Paralisi  and  Si&riat  I/O  Ports.  Gompuler  MO  IM.  Compyfer  I/O  IV 
Computer  no  W  Pfocessor  Connecttons,  Finally  Th«  Kilobaud  KrescenEio,  Cpmrns  arvd  Troiibleshootmc 
E^pariaions  art{|  Programming.  Mochme- Language  Pidtgiamming  Assflrnbiy-Languagia  Programmmg.  Con 
r»ectiiiQ  to  the  OuisiE^Wofld.  ,^^  «tr-»-^rt*^  #^j  j  nt- 

(SBN o«oo6^Q?ri  BK7386  $14.95 


FOR  TOLL-FREE  ORDERING  CALL  1-800-258-5473 
WAYNE  GREEN  BOOKS  •PETERBOROUGH  NH  03458 

Use  the  order  car^t  or  iiemjze  yoyr  oreter  an  a  separate  piece  of  pap6r  and  mail  lo  Wayne  Green  Book^  Att:  Sales  •Peterborough  HH  03458. 
Be  sure  lo  inciude  checH  or  del  ailed  credit  oaifl  information.  (Visa,  Master  Charge  or  American  impfess  accepted.^ 

No  COD,  orders  accepted.  AH  orders  add  t1 .50  for  the  fifsi  book,  posiage  and  nandling;  Si. 00  each  additional  book;  $10.00  per  book  lor«iigr^  air  mail. 
Please  aHow  4-&  weeks  after  pubNcatJon  for  denvery.  QuestJons  regarding  your  order?  Please  write  lo  Customer  Service  at  the  above  address 


132     73  Magazine  •  June,  1982 


MBA  reader: 

A  NAME  YOU  SHOULD  KNOW 


f  What  does  MBA  mean?  It  stands  for  Morse-Baudot  and  ASCII. 
What  does  the  MBA  Reader  do?  The  RO  model  (reader  only)  uses 
a  32  character  alphanumeric  vacuum  fluorescent  display  and 
takes  cw  or  tty  audio  from  a  receiver  or  tape  recorder  and  visually 
presents  it  on  the  display. 

The  copy  moves  from  right  to  left  across  the  screen,  much  like 
the  Times  Square  reader  board.  Is  the  AEA  model  MBA  Reader 
different  from  other  readers?  it  certainly  is!  It  is  the  first  to  give  the 
user  32  characters  of  copy  (without  a  CRT),  up  to  five  words  atone 
time.  itcancopycwupto99wpmand  Baudot  at  60-67-75  and  100 
wpm.  Speeds  in  the  ASCfl  mode  are  110  and  hand  typed  300 
baud,  The  expanded  display  allows  easy  copy  even  during  high  speed  reception. 

The  AEA  model  MBA  has  an  exclusive  automatic  speed  tracking  feature.  If  you  are  copying  a  signal  at 
3-5  wpm  and  tune  to  a  new  signal  at  90  wpm,  the  MBA  catches  the  increased  speed  without  loss  of  copy. 
The  MBA  Reader  allows  a  visual  display  of  your  fist  and  improves  your  code  proficiency;  It  is  compact 
in  size,  and  has  an  easily  read  vacuum  fluorescent  display. 

The  Reader  operates  from  an  external  12  VDC  source-  This  allows  for  portable/mobile  or  fixed 
operation. 

Check  the  AEA  model  MBA  Reader  at  your  favorite  dealer  and  see  all  the  features  in  this  new 
equipment.  If  your  dealer  cannot  supply  you,  contact  ^  ^^  ^ 

Advanced  Electronic  Applications,  Inc.        -^^  ^^  mm  ^^ Brings  VOll  the 

P.O.  Box  2160,  Lynnwood.  WA  98036  Call  206/775*7373  #%^H^^BreaktnrOUgh! 

Prices  and  specifications  subject  to  change  without  notice  or  obligation 


4 


i 

4 


WORK  THE  U.H.F.  BANDS 

Add  a  transiverter  or  convener  lo  your  existing  lOm,  6m  or  2m  equipments. 
Choose  from  the  largest  selection  of  modules  available  for  DX,  OSCAR, 
EME,  ATV. 

TRANS VERTERS  MMT  50-144  $234.95 

MMT  144-28  $219.95 
MMT432-2S(S)  $319.95 
MMT439-ATVS379.95 
MMT  1296-144  $399.95 
^^^^  OTHER  MODELS  AVAILABLE 

CONVERTERS 

Choose  from  many  models  to  suit  your  needs. 
Examples:  MMC  432-28,  MMC  426/439— ATV 

MMK  1296-144,  MMC  l2aO™ATV 
Write  for  details  and  available  opiions, 

FILTERS 

Present  OSCAR  8  Mode  J  dcsense 
Use  MMF20O-7  S42.95 
Stop  receiver  IMD  birdies 
U--  PSR32  S59.95 

ANTENNAS 

420450  MHz  J-beams 

4Sd.  15.7  dBd  $75:75 

SSet.  18.5  dBd  $105.50 

1250-1300  MHz  loop  yagi  129fi'LY  $49,75 

Send  3fic  stamps  for  full  details  of  alt  our  VHF/UHF  items 

Pic-selecior  filters  Transvertcrs 

Low  pass  filters  Converters  ^^  ^ 

Varactor  tripkrs        ^^  Antennas 

Pre-amplifiers  W  Crystal  Filters 

Sfieetrum  Iniemaliott^,  Ine* 
Post  Office  Boi&  10S4S 
Concord*  Mms.  01742  USA 


70/MBM  48 


436 


Drake's  New 
Digital  Multimeter 
with  Advanced 
Auto  Ranging 
Features. 


^. 


/ 


Simpfc  ind  it&y ttt  opertli  The  OriKe  DM?35CI  Digital  Multtmeter  automaliciiiy 
meiturei  y^yr  selected  runctions  in  up  to  5  fsn§es.  at  the  touch  a!  b  button. 
Drake  i  Olgital  Millimeter  will  ml  overinad  circuits  artif  OC  accuracy  is  fl.B%a1 
retcfing  ±  0.?°b  o1  full  scale  h  conllnuily  lest  seunds  a  signal  when  circuit 
resistance  is  less  ihan  2Q  nhms.  The  iliiuld  crystal  display  afid  three  $tep 
proteclltin  teitur^  with  autozeroiit^.  polarity  indicadi^n  aM  avef-range 
warning  lignal  make  it  ideal  lof  servicemen  Of  holsbyists. 

Tlie  Drake  Digital  My  ill  meter  iiiald  CDfnpliie  with  {^alterres  Ibattery  life  is 
greater  than  300  hri|.  prebei.  20  amp  currectl  ihunl  spare  luse,  and  soM 
carrying  ease  Im  Qnly  195.95 

Add  t?  SO  slJipp»ng  and  handling  ptr  order  Sertd  cheek  with  ordw  and 
provide  sireet  address  tor  UPS  stiipmertt  Qi\iQ  resitfents  add  Sales  Tax. 


DRAKE 


In  Ohio,  or  for 
information  calh 
191^466^2421 


Credit -C^d  buyifs 

may  coll  tm I  free 

l-BOO-543^5612 


n.  L  DRAKE  COMPANY 

540  ftidiifd  Street.  Miamis&urg.  Ohio  45342 


hfH 


i:    ^   I 


t^See  Usl  Qi  At;tvertt99r$  on  page  I  r4 


73  Magazine  •  jLfnep1982     133 


HMf  SHACK 


f^  449 


doe  H.  Main  •  Evans vMle.  IN  4771 1 


AEA 

MBA  RO  Reader 

MBA-RCRcv/CodeConv  Xmt 
MM-2  MorseMatic  UMimaie  Keyer 
CK-2  Contest  Memory  Ke^^er 
KT-2Keyern"rainer 
I  sopole  144/220  MH2 
Af^RL 
Handbook 

Ani.  Book  new  &  Improved 
Large  assortment  of  pubJicalions 
ALLIANCE 

HD73nO  7sqJl,)Rofalor 
U-1 00  Small  Rotator 
ALPHADELTA 
R'J  20GW  LJQhining  PfoJeclOf 
HV  2KW  Ligfilning  Protector 
AM  ECO  Amateur  Radio  Theory  Course 
ASTRON 

RS7A5'  7  Arrp  Power  Suppfy 
RS12A9-l2Amp 
RS20A16-20Amp 
RS20M  16-20  Amp  w/meter 
RS;l5A26-35Amp 
RS35M  25-35  Amp  wymeter 
AZDENPCS300(J^3TO 
Most  accessories  in  slock 
B4  W  Folded  Dipole  (Super  Antennas 
BASH  Study  Guides 
BENCHER  BY  1  Paddle 
BUTTERNUT  HFeV 
CUSHCRAFT 
A3Trrbander3EL 
A4Tnbar^der4EL 
214B  14EL2M[rBoomef 
32■  1 9 19  EL  2  Mtr  Super  Boomer 
Many  others  In  Stock 
DAIWA 

CN  A  2002  2.5KW  Auto  Ty  nef 
CNAlOOl  .5KW  Auto  Tuner 
CN  520  1  8-60  M  Hi  Small  Mtr 
CN620B  1.8-150  MH7Mrr 
DRAKE 
TP7AXcvr 
TR5Xcvr 

ENCOMM  (SANTEC) 
ST  144/uP 
ST-440^uP 

All  accessories  in  stock 
HAL 

CT2lOOTermma| 
KB2 100  Keyboard 
CWR6B5A  Tele  Reader 
HYGAIN 

TH7DX7ELTribander 
TH3MK3S3ELTnhander 
V22  Mtr  Vertical    E^cellenl' 
HAMIVRotatOrlSsq  ft. 
Taillwister  Rotator 20  sq.  IL 
HOR  30025 sq  It. 
Many  otfrers  I  n  stock 
ICOM 

720A  Magnificent  Xcvfl 
730  Excel  lent  Rjg« 
PSl5PGwerSuppJy 
PS20  Heavy  Duty  PS/Spkr 
25lA2M1rAIJMode 
290A2MtrAiJMode 
25A2  Mtr  Very  Small  Mobile 
,2AT2MtrHandHeJd 
Large  stock o(  xcvfs  &  accessories 
KLM 

KT34A4ELTnE>ander 
KT34?(  A  6  E  L  Tribarrdef  "QeauUtL  I  Ant 
KANTRONICS 
Interface 

Mini-Terminal  RcvCocfeConv.Xml 
LARSEN  NLA  1 50MM  2  Mtr  Mao. 
MFJ 

4&B  Keyboard 
941C  Tuner 
lOJOPreamp 

Huge  Stock!  CaiE  lor  Discount! 
MIRAGE 
B23 
BIOS 

Bioie 

B3016 

HF/VHF  Meiers (5%  accuracy) 
SHU  RE 

444D  Very  Nice  Mict 

TENJEC 

546  Omni  e 

&60  Delta 

525  Argosy 

All  accessoriesm  stock 


S269  00 

349.00 

125.00 

90  00 

61.00 

35  00 

S10.W 
8.00 

call 

$99  00 

46.00 

(29.00 
32  00 
16,75 

149.00 

69.00 


OO 
00 
00 
00 


89. 

109. 

135 

149. 

S239.00 

call 

$135  00 

S9.95 

S36  00 

$99  00 

$169  00 

209.00 

65.00 

79.00 

call 

$425  00 
299.00 

63,00 
110.00 

call' 

call 

1295  00 
call 

call 

$696.00 

159.00 
B75.00 

$339.00 
199.00 
3^.00 
169O0 
239.00 
3S9.00 
call 

$1140  00 
699.00 
135  OO 

195.00 
549.00 
429.00 
305,00 
235O0 
call 

$315.00 
■  465.00 

$169.00 
269,00 
$39.00 

$289.00 

61.00 
90.00 


$79,00 
155.00 
239  00 

205.00 
100.00 

$50.00 

$975.00 

679.00 

439.00 

call 


812-422-0231 

WOU'fRl  9AM-fiPM  •  SAT  9AM  3PM   — 

Wnte  fpf  our  new  and  used  eaufpment  list 


•••••* 


A  STAR  IS  BORN 


*•■*■•*• 


Ideal  for  Novices^  SyVL's 

arid  seasoned  amateurs 
Buflt'in  code  practice 

oscilFator  fit  speaker 
12  VDC  Operation  or 

1 20  VAC  with  adapter 
provided 
Opt i o n 4 1  serial  /parallel 

ASCII  output  port 


1  \\\ 


■h    Co|!Sies  Morse,  Baudot 
8i  ASCII  codes 

^    Two  optimized  Morse 
ranges 

"A"    Dt^itai  St  Analog  filtering 
wvith  l6dbAGC 

'At    Automatic  speed  tracking 

3  ~  70  WPM 


50 


A  cod^  reader  so  advanced  it  costs  vcu  t^ss!  Call  of  write  for  brochure  or  order  direct. 

CODE*STARTMKit CS-K  $169  95 

CODE*  STAR  Wired CSF   $22935 

Optional   ASCII   Output   Port  Kit , CS-^lK  $    59.95 

Optional  ASCII  Output  Port  Kit  Wired 

(Specify  110  or  300  Baud  and  20nnA  or  TTL  t€vel) .  .CSiF  $    79.95 

Send  check  or  money  order.  Use  your  VISA  or  MasterCard.  Add  $5.00  shipping  and 
handling    for    continental     U.S.    Wisconsin    residents    add   4%    State    Sales    Tax. 

Corporation  Telephone:  (414)  241-8144 

P.    O,     Box    5130,       Thiensville,    Wisconsin    53092 


r 


T^tcc^iae^ta^ 


CENTRAL  NEW  YORK'S  MOST  COMPLETE  MAM  DEALER 


ICOM  IC-??0 


frWi 


^    M   % 


KENWOOD   rtiBiOti 


HO^OT  SQQ 


DRAKE  TRT  DR7 


YAESU  rt7D7 


Featuring  Kenwood.  Yaesu,  Icom,  Drake,  Ten-Tec,  Swan,  Dentron,  Alpha,  Robot. 
MFJ,  Tempo.  Aslron,  KLM,  Hy  Grain,  Mosley,  Larsen,  Cu3hcraft,  Hustler,  Mini 
Products,  Bird.  Mirage,  Vibroplex,  Bencher^  Info- Tech,  Universal  Towers, 
Call  book,  ARRLp  Astatic.  Shure,  Collins,  AEA.  We  service  everything  we  sell* 
^miM  Write  or  call  for  quote.  You  Won*t  Be  DIsappointsd 


L 


Wg  are  just  a  few  minutes  Off  the  NYSTfiruway  (!-90)  Exit  32 


'tmiei  ctii^pi 


OUT  OF  STATE 
ORDER  TOLL  FREE 

800-448*9336 


ONEIDA  COUNTY  AIRPORT  TERMINAL  BUILDING 
ORISKANY.  NEW  YORK  13424 


N  y    Res   Call  ^315^  736  0iS4 


Wafran-K2fXN 

Bob^WA2MSH 

Al  ^  WAZMSI 


PORTA  PEATER 


iS- 


s'^yoo^g^up 


4thjnrsel  fROM 
CWIDcr 


M100  A 
INSTANT  REPEATER 


Wchrk^  with  ^ny 


VOX  or  COR 


ISUvolt 
swicchinf 


^302 


An  Inibtjrit 
Repeater 


Complfte  Tim*f 

Functioni 


'Buirt  tnTetr 
Funciiotis 


20  Pagp 
T^hnic^l  Manual 


W-S  ENGINEERING   P,0.  BOX  58,  PINE  HILL,  N.J.  08021        (201-852^0269) 


DIRECTION  FINDING? 


*ir;"  ■ 


Doppier  Direction 
Finding 

No  Receiver  Mods 
Mobile  or  Fixed 
Kits  Of 

Asserfibled  Units 
135-165  MHz 
Standard  Range 


•  Cin:u(ar  LEO 


•  Optronal  Digital 
Display 

ic  Optional  Serial 
Interface 

•  12  VOC  Operation 

•  90  Day  Warranty 


New  Technofogy  (patent  pending)  converts  any  VHP  FM  receiver  into  an  advanced 
Doppier  Direction  Fincier.  Simply  plug  into  receiver's  antenna  and  external  speaker 
jacks.  Use  any  tour  omnidirectional  antennas.  See  June  1981  issue  of  73  for  technical 
description.  Kits  from  $270.  Assembled  units  and  antennas  also  available,  Can  or 
write  for  full  details  and  prices, 

'(CJ  DOPPLER  SYSTEMS,    lct«!dS^t2  8?2t4    t^o^)  998.1151 


*^  42& 


,. .V  '*  -r-:-  .>-,-.'  1 '  ■■  :■  -;■■;*>'.■  ■:■ 


134  73 Magazine   •  June,  1982 


at  iast  -  everything  at  your 

fingertips  !  !  ! 


m^'n 


ri»<f*..- 


^^^ 


$184 


Radio  Equlprnent 
NOT  Included 

F.OB.  Culver  City 
(CA  Residents  add  6%  sales  tax) 


Bring  ORGANIZATION  & 
CONVENIENCE  to  yoitr 
HAM  Station!  Elimmate 
clutter  and  provide  lots  of 
space  for  everything  you 
need  -  l\meis,  VFO,  CW 
Keyers,  Filters,  Telephone, 
Log  Book,  Etc. 


ANGLED  REAR  SHELF 

ALL  PARTS  FITTED 

STURDY  CONSTRUCTION 

WALNUT  or  PECAN  FINISH 
Floor  space:  39" w  by  30' U 
Also:  SV'w  by  30"d  -  $199.50 

Dealers  inquiries  Invited 


A  Finely  Crafted  Piece  of  Furniture 

With  a  REAL  Purpose . . . 

Call  :  (213)  837-4870  or  Write  for  Information 

S-F  Amateur  Radio  Services 

4384  Keystone  Ave.,  Culver  City,  CA  90230 


»^S5 


.OV£R  70  BRAN&SHLANO-MOBILE, 
IN  SIOCK     B     RADIO 


Full  Service  Shop  •SisecfruTTi  Analysis  •Antennas 
New  and  UsetJ  Equipment  "CW-SSB-FM   Etc   •Towers 
FCC  Study  Guides  -Code  Tapes  •Books  •Accessories 


HOURS 

MON  TUES    WEQ 
3  30<G  DO  PM 


THUHS,  FHI, 

lao^aQO  PM 


Specialists  in  Amateur  Radio, 
Short  Wave  Listening 
And  Contemporary 
Electronic  Gear. 


n  ■ 


^T^rTT 


SAT    9  30-3  00  PM 

r 


INC  V 


lOOS  GAHriELO  ST.     OAK  PARK.  IL.  60304 


{312)848-6777 


UPDATE  YOUR 


•Beautifully  styred        HAMSHACK 

'Sturdily  constructed  ^_^^^^^^^^^^_ 
•Angled  rear  shelf  * 

^Completely  sanded  &  drilled        ^^^^^^^« 

assembles  with  a  screwdriver  ■ 

•Tuning  controls  at  your  fingertips  ^~^~ 

(or  ease  of  operation  —  great  for  contests  ^ 
^Adds  a  professional  touch  to  hamshack 


VtSA  ind  Mastercard  wflJcofn« 
ttrfite  lot  brochure 


Tldi-O  *<^i|}^«n|  n4t  indmiad 

UOOOO  F  oa  Slow.  Ohio 
(In  Oftto.  »o4  Svi%  i*4«s  1«»1 


W-F  PRODUCTS       P.O.  BOX  1578       STOW,  OHIO 

PHONE:  (216)  678-9203 


i^V2& 


AES  SpmdAl 

Panasonic  Camera  &  Monitor 


WV-i400  BSW  TV  Camera 
For  CCIV.  SSTV,  etc  Sensittwe  2/3"  separate  mesh 
vidicon  (Type  20PE13A)  pick-up  lube  525  lines/60 
fields/ 30  frames,  RS  170  or  line  locked  sync  system 
16mm,  fl  6.  C  mnufrt  tens,  automatic  Ifght  com  pen  sa- 
tiDfl  for  use  under  various  light  cor^ctilwns  Video  Dut- 
pift.  IV  p  pcGmpositfi/750hms  3  >  v* "  IVh "  8H'd, 
3-7  lbs  120vK/60Hi ....  SALE  PRICI  -  St 99" 


TR  930  B&W  TV  Monitor 
AcompacI,  economical  monitof  tof  CCTV  SSTV,  RTTY. 
Computers,  etc.  9'  diagonal  screen  WJtti  700  I*nes 
resolution,  produces  sharp,  detailed  p<ciure£  All  con 
trels  conveniently  locited  on  ff oni  p^nel  Vjcleo  input 
1  OV  piJ  HiZ  or  75  Ohms.  9"ri»  8^rw*9'**'d.  U-i 
tbs,  I20vac/60  Hi  ,,,... SAIE  PRICE  -  $ t S9» 


Robot  -  SSTV 


Model  400  SSTV  SCAN  CONVERTER 
Regular  S795  -  Sale  Price  $679^^ 
$100  Factory  Rebate  untri  May  31. 1982 

Use  your  CREDIT  CARD! 


/_ 


/  'yr\ 

MotferCofdl 


AMATEUR 

ELECTRONIC  SUPPLY 

4828  W.  Fond  du  Lac  Avenue 

Milwaukee.  Wisconsin  53215 
Phone:  {414}  4424200 

Wisconsfn  WATS:  V800-242'5195 

Nationwide  WATS:  1-800-558-0411 

AES  Branch  Slort-^  in:  Clear Wat^r  FL  • 
Orfandn  FL  •  Wirkhffe.  OH  •  Las  Veoas  NV 


I 


«^Se£  Ust  iOf  A(fveru$6^i^  on  pags^  1 14 


73Magazme  •  June,  1982     135 


^rbit 


ORBIT  is  the  Official  Journal  for  the 
Radio  Amateur  Satellite  Corporation 
(AMSAT),  P.O.  Box  27,  Washington,  DC 
20047.  Please  write  for  application. 

For  a  FREE  SAMPLE  COPY  please 
send  $1  to  cover  First  Class  Postage 
and  handling  to:  Orbit,  221  Long 
Swamp  Road,  Wolcott,  CT  06716. 


IVIOVING? 

lei  us  know  9  weeks  in  advance  sa  that  you  won'! 
miss  a  single  issue  of  73  Magazine. 
Attach  old  label  where  indicated  and  print  new  ad- 
dress in  space  provided.  Also  include  \out  mailing 
label  whenever  you  write  concerning  your  subscrip- 
tion. It  helps  us  serve  you  promptly.  Write  to: 


magazine 


Subscription  Department 

P.O.  Box  931 

Farmingdale  NY  11737 


I 
I 
I 
I 

I 
I 


D  Address  change  only  D  PavmenI  enclosed 

D  isitend  sub^chj^tion 

D  Ent(*r  neitir  subscrtptFon  D  Bttl  mt  later 

D  1  verti  119  97  (Canada  S22  97.  Foreign  S39.97/US  tund*i 
foreign  air  mail.  pleaM"  rnquire 

ft  you  have  no  tube  I  handy,  prmt  OLD  address  here. 


2^  Name 


CaH 


^  Address 

t  City 


I 
I 

I 

I 

I 

I 
I 

I 


State 


I 
I 
I 

I 


print  NCWadc/fvs^  h 


rks  nvre. 


Name 


an 


Address 
Cky 


State^ 


Zip 


The  Electronic 
Breadboard 

Computer  Aided  Design  (CAD)  is  one  of  the  newest 
of  the  applications  of  microcomputer  technology, 
THE  ELECTRONIC  BREADBOARD  permits  the 
design  and  analysis  of  analog  circuits.  It  can  be 
used  to  evaluate  voltages,  currents,  impedance 
and  the  frequency  response  of  any  circuit. 

This  package  is  ideal  for  audio  component  repair- 
men, ham  radio  technicians,  hobbyists,  electrical 
engineers,  telecommunications  engineers*  audio- 
philes  and  students  of  electronics.  Plug  it  in  and 
slice  away  a  lot  of  guesswork, 

0287R-67  Model  I  &  III  level  H  16K  $49.95  * 


Instant  Software 


PETERBOROUGH,  N.H.  03458 


TO  ORDER:  St'f  your 

lot^al  instant  Sofi  ware 
dealer  or  call  Toll-Frrt* 

1-800-258  5473  unJrrfconlv 

in  New  Han^pshire  1 -603-924'947 1 

Mwi  -Fri  BOO  am— 4i30  pril  K.S  T 


136     73  Magazine  •  June,  1982 


the 


6. 


7. 


10 
11 


NEVER  SAY  DIE  — If  you  want  controversy* 
Wayne  Green  W2NSD/1  will  give  it  to  you  His 
popular  column  ranges  from  travelogue  to  tirade 
and  is  guaranteed  to  entertain^  insptfe  and 
enlighten  you 

DX  — This  globe-trotting  column  keeps  you  in- 
formed about  the  news  of  the  DX  world  from  King- 
man Reef  to  Bahrain 

CONTESTS  — You  get  all  the  news  on  the  contest 
world  from  Robert  Baker  WB2CFE.  He'll  give  you 
information  on  upcoming  events  and  results  from 
recent  contests. 

FUN  — Just  for  fun,  John  Edwards  KI2U  provides 
you  with  wacky  puzzles,  quizzes,  and  games  that 
test  your  ham  mettle. 

FCC  — If  you're  looking  to  the  future,  these  out* 
takes  from  the  Federal  Register  chronicle  changes 
in  policy  and  regulations  that  relate  to  amateur 

radio. 

RTTY  LOOP  — To  keep  you  abreast  of  radtotele- 
type  deveiopments.  Marc  Leavey  WA3AJR  ex- 
plains the  new  RTTY  equipment,  the  increasing 
rote  of  computers  in  RTTY,  and  other  matters  of 
interest  to  digital  communications  fans 

REVIEWS— Before  you  buy,  save  yourself  some 
money  ,  check  7J's  indepth  evaluation  of  the 
latest  gear 

HAM  HELP— As  a  service  to  you,  73  prints  your 
questions  in  our  magazine.  This  helps  you  to  ob- 
tain hard'to-get  parts,  schematics,  and  owner's 
manuals. 

SATELLITES- From  Phase  III  to  TVRO,  73  Maga- 
zine covers  the  news  of  the  satellite  world  like  no 
other  radio  amateur  magazine. 

NEW  PRODUCTS- This  brief  look  at  the  latest 
ham  equipment  on  ih?  market  keeps  you  on  top  of 
new  developments  m  amateur  radio, 

AWARDS  — To  find  out  what  certificates  are  avail- 
able where,  read  Bill  Cosney  KEZC's  coverage  of 
all  the  ham  radio  awards. 

CONSTRUCTION- The    builder's    magazine 
that's  73.  You  get  the  best  proiects  from  the  best 
authors  every  month.  ^^. 


I    Send  me  a  dozen  issues  of 

MAGAZm 

for  the  dozen  reasons  listed! 


D  1  year,  USA  $19  97 

D  1  vear,  CANADA,  US  funds  $22  97 

ni  year,  FOREIGN.  Surface,  US  funds  $39,97 

D  MC     n  VJ5A     [J  AM,  EXP.     D  CHECK/MO 


n 


Name_ 
AcJdr^55 

CJtv  


State 


Zip 


Card  n 


.Esp  Date 


lntefl>ank#. 


StBnatiife. 


L 


Mail  to 

73  Mkis^^me  Substiripinn  DefA 

PO  Box  951.  fa*rniiiga»»«^  NV  1171? 


12SB6 


MAGAZINE 

FOR  RADIO  AimtURS 


Subscription  Department 
PO   Box  931 
Fannrngdafe,  NY  11737 


1 


:'i  I 


256-5473 


For  orders  only  please. 
Foreign  air  mail,  please  inquire. 


R4)D  BOOKSHOP 


Think  Spring, 


VHF 


ANTENNA 


ANTENNAS 

tot  tho  RaiJKj  Amahmjr 


Tliini<  Antennas 

VHF  ANTENNA  HANDBOOK— Th©  new  VHf  Antefifta  H^ndboo/^  ctetaHs  tne 
theory,  design .  and  construci  icn  o  r  ti  u  n<]p«dit  «rf  drtlBf«nt  VH  F  and  U  H  F  an  ten  nas 
A  praett^caf  book  wrifien  for  the  3vera<^  ■fnatmi^r  who  takes  foy  rn  building, 
not  tiill  of  com^lev  fomiyias  tis*  ih©  desiQn  «figtneer  Packed  with  fabyloua  an 
tonna  projacts  you  can  tHiiid  BK7WB  £5^  ' 


PaACTICAi  ANTENNAS  FOR  THE  nADtO  AMATiUR-A  manual  de^ribing 
how  to  equip  a  tvam  statiofi  with  a  suitable  antenrvft.  A  wide  range  of  antofina 
topics,  sysiems,  and  accessories  are  presdntsd  giving  the  reader  soma  Tood  for 
I  he  tig  m  and  practicai  data  (or  con^Uuctlon  Designed  to  aid  the  experienced 
ham  unci  novice  as  well.  OnFy  QK1015  $Q.&5/ 


73  DIPOLE  AND  LONG  WIRE  ANTENNAS— by  Edward  M .  NoN  W3FQJ,  Thfs  is 
Ihe  Ural  collection  of  virtually  every  type  of  wire  antenna  used  by  amateura.  In 
cjudea  dimensions,  cqnflguraiiona.  and  detailed  constfuctlon  data  tor  73  6\1 
ferent  anienna  types.  Appendices  deiscrlba  the  construction  of  noise  bridges, 
ilne  tunera,  and  data  on  measurtna  resonant  freqLiancy,  velocity  factor,  and 
swr,  BK1016S5  50.'  ^         i  ?  . 


ALL  ABOUT  CUBICAL  QUAD  ANTENNAS  an4  edlirofi}— BK1196--The 

■'Cl'assJC'  on  Quad  design,  liieory,  construciton.  and  opeFat^on.  New  2nd  edi- 
tion contains  new  Jeod  and  maichirvg  systems  and  new  data  £5.95 


BEAM  ANTENNA  HANDBOOK  {Naw  Sth  •d1tkm)^SKtt97- Yag^  beam  th<Ory. 
construclion  and  operation.  Intijrmaiion  or^  wire  beams,  SWR  curves  and  maich 
irig  sy^tams,  A  "must   tot  serious  OXor^  $&.95 


VHF  HANDBOOK  FOR  RADtO  AKATEURS  -BKIigB-Conlams  informatioil  Oft 
FM  Iheoo'.  operation  a/>d  «quipm«fil.  VHF  antenn.a  defrifpi  and  cor^ruction, 
satellitfl^EME.  and  tha  naw^  solid-state  circuits.  S6.9S 


THE  RADtO  AMATEUR  ANTENNA  HANDBOOK -&K1 199- AH  about  wire  amerh 
nas,  t>eams.  tun&rs,  baluns,  coax,  radiali,  SWf^  and  towers  Clear  ar>d  complete 


SJMPLE.  LOW^OST  WIRE  ANTENNAS  FOR  RADIO  AMATEURS -BKt  200^  Alt 
new  data  and  everything  you  want  to  know  about  low-cost,  muiti-band  antennas. 
Inexpensive  beams,    invisible"  antennas  for  hams  in  'touflh'^  locations.  $6,95' 


ALl   ABOUT   CUBICAL   QUAD   ANTENf^AS   (2nd   edltlonj— BK1196— The 

''Classic''  on  Quad  despgn,  tfieory.  consiruciton,  and  operation.  New  2nd  edl- 
I  ton  contains  new  feed  and  matchInQ  sy  sterna  and  new  data.  E5.95* 

Use  the  ord&r  card  In  this  magazine  or  Itemize  your  order  on  a  separate  piece  of 
paper  and  malJ  ro;  73  Radio  Bookshop  •  Petemorough  NH  03458,  Be  sure  to  In- 
clude check  Of  detailed  credit  card  information.  Ho  C.O.D.  orders  accepted.  All 
orders  add  $1 ,50  handling  first  book,  S 1  00  each  additional  booh,  $10.00  per  book 
foreign  airmail.  Please  allow  4-6  weeks  Jor  deNvery  Questions  regarding  your 
order?  Please  write  to  Customer  Service  at  the  above  address  (Prices  subject  to 
change  on  booi^s  not  published  by  73  Magazine,) 


Front 


mGAZINE 


THE  1982  EDITION 

GENERAL  LICENSE 
STUDY  GUIDE 

by  Timothy  Al.  Dan/e/  HBRK 

This  \s  the  complete  guide  to  the  General  License. 
Learning  rather  than  memorizing  is  the  secret  This 
is  not  a  question-and^answer  guide  that  will  gather 
dust  when  the  FCC  issues  a  new  test.  Instead,  th^s 
book  will  be  a  helpful  reference,  useful  long  after  a 
ham  upgrades  to  General.  Includes  up-to-date  FCC 
rules  and  an  application  form. 
ORDER  yours  today  and  talk  to  the  world. 
SG7358       S6.95 


'Use  ih^  order  caf  d  on  the  Reader  Service  page  of  this  magazine  or 
itemize  your  ordef  on  a  separate  pie^  of  paper  arxl  mail  tO-  /3  Radk>< 
BooHshop'P^terborovOh  NH  03458  Be  S4jr^  to  include  check  or 
detailed  credit  card  inforrtiaticm.  No  CO.D.  orders  accepted.  Add 
$1,50  haiHSling  ctiar^e  tor  the  hrst  book;  $1,00  for  each  additional 
E)ook  Questions  re9ardtng  yovr  ortlsr?  Please  *f iie  to  Customer 
Service  at  the  atKive  address  Please  allow  4-6  weeks  tor  da h very. 


FOR  TOLL  FREE  ORDERING 
CALL  1^00-25B-5473 


From 

THE 
MOST 


'=  MAGAZINE 


*W€)JR 


D 


c^TLAS 


C5S> 


UP-TO-DATE 
REPEATER 

ATLAS 
AVAILABLE! 

INCLUDES: 

•  LIS  TINGS  BY  STATE  AND  COUNTRY 

•  LISTINGS  BY  FREQUENCY 

•  MAPS  FOR  EACH  STATE 

•  28  MHZ  THROUGH  1 296  MHZ 

•  PERFECT  FOR  MOBILING 

•  WORLD  REPEATER  ATLAS-BK73l5-ConipleteIv 
updated,  over  230  pages  of  repeater  listings  are  In- 
dexed by  location  and  frequency.  More  than  50  maps 
pinpoint  2O0O  repeater  locations  throughout  the  USA 
Porelen  listings  Include  Europe,  the  Middle  East,  South 
America     and  Africa.  84.95.  ' 

IN  STOCK  AND  READY  TO  SHIP 

*Use  the  order  card  on  ihe  Reader  Service  page  of  Ihis  magazine 

or  itemize  your  order  on  a  i^eparato  piece  of  paper  and  maii  to: 

73  Radio  Bookshop  •  Peterborougti  NH  0345a  Be  sure  to  include 

Check  Of  detaJJed  credit  card  fnformation  No  C.O.D  orders  accepted. 

Add  Si  50  handling  charge  for  me  hfst  book,  St  00  lor  each  addillonal  book 

Questions  r^gsfding  your  order"^  Please  write  lo  Customer  Service 

at  the  abotre  address  P^ea1ie  allow  4-6  weeks  for  delivery 

FOR  TOLL  FREE  ORDERING  CALL  1-800*258-5473 


t30     73 Magazine  •  June,  1982 


t/y 


NEW   from 


THE 

NEW 

WEATHER 

SATELLITE 

HANDBOOK 


BY  DR.  R\LPH  E.  TAGGART 

Here  is  the  completely  updated  and  revised  editron  of  the  best- 
setting  Weather  SstetMte  IHandbook— containing  all  the  infor- 
mation on  the  most  sophisticated  and  effective  spacecraft 
now  in  Of  bit.  Dr.  Taggart  has  written  this  book  to  serve  both  the 
experienced  amateur  satellite  enthusiast  and  tfie  newcomer. 
The  book  \s  an  introduction  to  satellite  watching,  providing  all 
the  information  required  to  construct  a  complete  and  high  fy  e(< 
fective  ground  station.  Not  just  ideas,  but  sotid  hardware  de- 
Signs  and  all  the  instructions  necessary  to  operate  the  equip- 
ment are  included.  For  the  thousands  of  experimenters  who 
are  operating  stations,  the  book  details  a1!  procedures  neces- 
sary to  modify  their  equipment  for  the  new  series  of  space- 
craft. Amateur  weather  satellite  activity  represents  a  unique 
blend  of  Interests  encompassing  electronics,  meteorology 
and  astronautics.  Join  the  privileged  few  in  watching  the  spec- 
tacle of  earth  as  seen  from  space  on  your  own  monitoring 
equipment.  Order  BK73d3  S8.9§ 

SAVE  $2.95 


WEATHER  SATELLITE 
HANDBOOK  (first  edition) 

By  Dr.  Ralph  E.  Taggart  WB8DQT.  Valuable  information  in  this 
first  edition  is  not  included  in  Dr.  Taggart^s  just  published 
bookp  The  Kew  Weather  Satellite  Handbook  (see  above). 
Chapters  such  as  ''How  to  Build  an  Electric  Timer  for  Satellite 
Tracking*'  and  "Building  an  Automatic  Control  for  the  Satellite 
Receiving  Station"  will  no  longer  be  available  when  this  edi- 
tion is  out  of  print.  This  is  a  good  entry  ievel  text  for  those 
discovering  the  exciting  new  use  of  weather  satellites.  Regular 
price:  $4.95.  SPECIAL  PACKAGE  PRICE^-BOTH  BOOKS  FOR 
ONLY  $1 0.95.  SAVE  52.95!  (This  o*fer  available  only  while  sup- 
plies lastj  Order  WS73O0  and  receive  both  editions  of  the 
Weather  Satellite  Handbook  for  only  $10,95  (plus  S1.0Q  shipp- 
mg  and  handlmg  charge). 


'Use  llie  order  card  in  this  magazine  cif  *X^miiM  yourofd&f  on  a  seoafate piece  or  paper 
an(3  mail  to:  73  RadfO  flock  shop  •  Petertjorough  NH  03458  Be  sure  to  tnclutSe  cfiech  Of 
detailed  credit  card  mformanon  Add  $1.50  first  Doqk.  Si  00  each  a^ditionaJ  booK, 
$1Q,Q0  per  book  tofctgn  airrnail  Note  Prices  subjec!  to  change  on  faooks  not  pub4isll«tf 
by  /3  Magazine.  Questions  regarding  your  order?  Please  iMnie  to  Customer  Sefvice  at 
trie  above  address-  PEeasealtow4  6  weeksfordeSivery  No  CO  D.  orders  accepted  For 
Ton  Free  ordering  call  1'aOO-25a'5473 


[OM 


K\^^ 


JA 


1^ 


*  * 


MAKE 
MONEY.  .  . 
$ELL 
MAGAZINE 

Selling  73  Magazine,  the  ham  radio 
magazine  that  offers  quality  and 
quantity,  brings  the  ham  into  your 
store.  Once  through  the  door  you 
can  sell  him  anything. 


Our  dealers  are  telling  us  that  '73" 
outsells  them  all. .  .so  call  today 
and  join  the  dealers  who  make 
money  with  73  Magazine. 

For  information  on  selling  73 
Magazine  call  603-9Z4-9471  and 
speak  with  Ginnie  Boudrieau,  our 
Bulk  Sales  Manager.  Or  write  to 
her  at: 


I 


MAGAZINE 

80  Pine  Street 
Peterborough  NH  03458 


\ 


'^ 


73  Magazine  •  JuneJ982     139 


SYNTHESIZED 

SIGNAL  GENERATOR 


MADCIN 

USA 


MODEL 

S610OD 

S3I3  95 

p^%  thippmq 


•  Covfifs  TOO  m  185  MHz  m  1  kHz  steps  wilh  ihtimh- 
wheet  [fiaJ  •  Accuracy  1  pari  per  10  mil  (ion  al  all  he- 
quef^dts  •  iniemal  F  W  adjuslatle  Irom  0  to  100  kH^ 
at  a  1  kHz  rate  •  Spiirs  and  noise  al  least  60  dB  be- 
low  carrier  •  RF  output  adjustable  from  5-500  mV  at 
50  ofims  •  Operates  on  12  Vdc  @  1/2  Amp  •  Avail- 
Mb  lor  immediate  deli  very  *  S349.95  plus  shipping 
«  Add-Qfi  Accessories  availat^le  lo  extend  freq 
range,  add  inlinitt  re^ohftkm,  voice  and  sub  audible 
tones  AM,  preQision  120  dS  calitirated  aUenuatttr 

•  Call  lor  details  •  Dealers  wanted  worldwide. 


VANGUARD  LABS 

iee-23  Jmrniica  Ave.,  Hoills,  NV  t1423 
Ptionft:(212)4Sa273{) 


311 


C.B.  SPECIAL 

(Repeat  of  a  sell  out) 

CONVERT  THESE  TO 
IOMETER  FM 

Httvn   Hy-Q^m  4Q  chan-nel   pririlfid  c;ircijit 
boards  assembly  ^Sque^cfr  pot    i^Qiume 
com  rot  ana  channel!  iwtich  jioI  inctiidedl 
Bostii%  sold  as  1*  D"Tvtnsion  ^  X^ 

1-9  pCi  S7.Sa  ««. 

10-49  pes  S6.$0  •!. 

ivyripi«  guaniiiN^  last? 

REMOTE  40  CHANNEL  C-B. 
Remoies  have   a   meTai   Tram*    Spea4ief 

pia*lie  case.  sf^<3  cofilrol  mic  not  fnqluded 


Solid  a$  IS. 


Sl4JSea 


C.B.  BARGAIN 

C*r>  D«  i4%ea  #o#  %|)*ri^  pii ^5  flvv  ^#iper*i»* 

S3.S0  ea 

DfHer  mfofmahon  Piea'&if  atkl  M  QC  fo« 
S'W  ¥>*  UFS  CODs  acc^tKl  ioi  t^'a»f% 
loliH»"g  S50  00  Of  moie  Fiondi  »rs»aents 
add  4S.  saj^s  lax   HMm^niuni  order  S^^OO 

Ffjffeigfl  orbeT^  US  ignds  Ofily  acta  ^O""-  fot 
S^H  MASTER  CARD  and  VISA  flccBpied 

Surplus  Electronics  Corp. 

7294  NW54thSr 

Miami  FL  33166  ^&9 

P  H  Ji  30^^7  e22S 


Subscrtption 


73  Magaane  does  not  keep  subscrip 
lion  records  on  the  premises,  there- 
tore  calling  us  only  adds  time  and 
doesn't  solve  the  problem. 

Please  send  a  description  oT  the 
problem  and  your  most  recent  ad- 
dress label  to: 


73  Magazine 
Subscriptior^  Dept 
PO  BoK  931 
Farmlngdale,  NY  11737 


Tharth.  yoy  ar\d  efipy  your  sultscripMon 


Take  your  favorite  HX  out 
for  a  drive  tonight. 


VISA  or  MASTERCARD  for 
same  day  shipment 


For  S69.95  you  get  the  most  efficient, 
dependable,  fully  guaranteed  35 W  2  meter 
amp  kit  for  your  handy  talkie  money  can  buy. 

Now  you  can  save  your  batteries  by  operating 
your  HT.  on  low  power  and  still  get  out  like  a 
mobile  rig.  The  model  335A  produces  36  watts 
out  with  an  input  of  3  watts,  and  15  watts  out  with 
only   1   watt  in.  Compatible  with  IC-2AT.  TR-2400, 
Yaesu,  Wilson  &  Tempo!  Other  2  meter  models  are  avaih 
able  wtth  outputs  of  25W  and  75W<  in  addition  to  a  lOOW 
amplifier  kit  for  430MHi  ^m 

Communication  Concepts 


2646  N.  ^^mgon  Av«..  Daytewi,  OH  454^ 


NEiWAL  ELECTRONICS 

COAXIAL  CABLE  SALE 


POLVETHVLENE  DtELECTfliC 

FlG2l3nonconiam4na1lng95%  stileldmiFspec.  SSc/fi 

RGl74^Umirspf!e.96°/fl  shield ,  .lOt/fL 

RGI 1U  96%  shield.  75^ohm  mi(  spec 35e/ft 

RG8U  96%  shield.  m( I  spec.  ,           3l^^t 

RGe  A/U  double  sn  leid.  75<jhm  2  5«^lt, 

flGSEAU  stf  arrded  mi  I  ^oec  ^  IttH. 

RGSe  mil  spec  %'.slii6kl.                .^     .  11c«l 

LOW  LOSS  FOAW  DIELECTRIC 
RG8X96*4  shield iblach.wtiiieQfgrayi..  $14.9^100 ft 


nOBU  80*ffi  shvelcl,,.«^ 

RG58U  80%  shield 

F!G5BLJ95%  shield.. 

RG59U  1W%  Ion  shield,  TV  type     $7nOQ  h. 

f^G^U  97%  shifiJtl  1 1  ga.  (eqLik  Beidert  82 1 4) 

Rotor  Cable  B^con  2-18  ga,  ^22  fla..„„ 


ITcfft. 

ia«^n. 

07e/fi. 
lOtffl. 

31c/ft. 


RGSU  mii  s|»c  96*a  shJeJOf27.9S/lOOit.  3l«rtt 
RG214U  ^bl  silv«f  isbietcJ.  50ohrn  „ ,..S1.35/a 

too  fl.  RGBli  with  PL'259  on  eaet)end$19J5 

BELDEN  Coait  in  100  f I.  rolls 

RG5SU  #3201...,. , S1 1.95 

RGaU#S208^^_ S2A3S 

•  Grourxling  stlfjip.  i^ivy  duty  tAbui«r  brifd 

3/i€in.  tinned  copper .__^„ .„lO«rtt 

3A  in.  tinned  ct>ppef_««^,„_. 30e/lt 

CONNECTORS  MADE  IH  USA 

AfUfitiena!  PI  £59 79« 

PL259  push-on  adapter  shtsll  Wf%3M 

PL  259  A  SO  239  10/S5.89 

Double  MaJe  Connector,  ,    .         St. 79 

PL  258  DoutJl^  Female  Gonnectof.  38< 

1ft  patchcord  w'RC A  Eyp€ptuds each  end  3/Sl.DO 

Reduce*  UG  1 75  or  T76  lll/$l  99 

OG  255  (PL  25§  to  BNQ  S3, 50 

Eibo*(M359^  SI  79 

F5gAiTVt¥pc>  10^2,15 

UG  2  tD/U  Am  phenol  Type  M  Male  for  RG8  S3.00 

BNcuGeec/u  ma!e..._ _^,...  si, 25 

V\B  inch  Mike  PJuQ^Of  ColMnsetc.  Si. 25 

UQ27aBNCtoPb259  S3O0 

FREE  CATALOG 
COD  add  SI  50— FLA  R«s   sdd  4%  Sftte^  Ta* 


Connectors— shipping  10%  add'l,  2,50  minimum 

Cabie-"Shippmg$3  00  tst  too  ft    S2  00  ejch  add  I  too  II 
56&5  SW  80th.  Stregt  OepL  RLO  Miami,  fl  33143     Call  (305^  6ei-5534 


PRESERVE 


73 


l! 


BINDERS    & 
FILE  CASES 

Keep  yoyf  issues  of  73  Magazine  togeihflf,  nandy 
^nd  protecled  in  hand:^ome  and  durable  Nbrary  files 
Of  binders  Boih  styles  bound  in  red  ^eathe^ette  with 
Ihe  magazine  1 090  stafn{3fH3  m  goid. 
Files    Each  file  hofds   12  issues.  ^itie»  visible 

tof  easy  teference.  S5  9^  eactt.   3  tor  $17  00, 

§forS30  00 
binders:  Each  btntjet  holds  I?  i^^ues  snil  opens 

ILai  tof  easy  reading.  $7  50  each.  3  fot  S2l  75, 

6  (or  S42  00 
(Postage  paid  In  USA.  Foretgn  orders  include  $2,50 
per  Item) 

PNfase  slate  years  1977  lo  1933 
Send  check  or  money  order  to: 
JESSE  JONES  BOX  CORP 
PO  Box  5^20 
Philadelpnia.  PA  1914 1 
Allow  4  to  £  ukaohs  fof  deikvefy 


this  publication 
is  ovoiloble  in 
microform 


University  Microfilms  tniemational 


*^412 


300  North  Zeeb  ftoad 
Oeot.  PR 

Ann  Arbor.  Ml  40106 
U  S  A 


ie  Bedford:  How 

Oept  PR 

London,  WClfldEJ 
England 


140     73 Magazine  •  June,  1982 


GO  MOBILE  WITH  YOUR  H.T.I 


Mod«l  I— Icom  IC  2Arr.  EIC 

Mod«l  K^  f£K  TR-2500 

—  &lki«i  on  tonom  of  rsdio 

iiiiiLiii'ffjriii«!">"ii«"'  I  !■■■  BfM^^^^ 


ModilK— TR'24(Nh 

— pow»rod  thru  battery  plu§ 

Mod«l  N  — FTSOdR 

Mtujel  T— Simpit  mod  lor  Teinpo 

NOW  FOR  FT'20flR  &  TR  2500 


iv»rl4Hi«*»ll4  l-l«FI44  l«4^^l  ■ 


Mod«|¥-"FT*207R. 
—Ills  tnio  battsry  ct>inpartfn«n1 

"  A  unique  baiteiy  eUminator  * 
HANDITEK  Regulator  a!low$ 
constant  h«nd^t>eld  operation 
from  auio  DC  or  tuise  sujSiply 
with  no  njc»d  drain  and 
WrtHOUT  RADIO  MOD  I  PICA 
TiOfJf  S34.9S  PPD  in  USA  CA 
*dd  S  1.50  Sales  Taji. 

HANOITEH 


P.O.  BOX  aaw.  la  pucnte,  ca  si74« 


NEW  YAESU  CONVERTED  FRO  FTIOI 
FRtOI  TS520  TS900.  PLUG  INTO  EXTEFt- 
NAL  VFO  JACK  AND  GO,  5  ACTIVE  DIG 
TO  T0H2.  REAR  PANEL  10HZ  DEFEAT 
SWITCH.  3^"  RED  LED.  1  3/8H.  4  1/2  W,  6 
1/2. 

SENDMOD.no.  +  US  MO  SI 20  EXTER- 
NAL VFO  USED:  ADD  S5  FOR  DOUBLE 
PLUG/JACK. 

ALSO  WORK  ON  FT620B  FT221  R599 
T599  HW1(31  SB102  ETC.  WRITE  FOR  IN^ 
STALLATION  INFO  WITH  MOD,  SER. 
NO  FT620B  UNIT  WITH  KIT  $125  IN- 
CLUDES ALL  PARTS.  fNFO. 
II      DUTT  &  POST  PAID,  6  MOS.  WARR. 

FgRAND  systems  20352  40 A  AVE 
I     LANGLEY  BC  CANADA  V3A2Y8 
k (604)530-4551      ^'^^     ^ 


SUPER  LOW  PRICES! 


AZDEN    PCS 3000  2^METER  1279.00 

AZDEN  PCS300  2METER  HT  1285.00 

SANTEC  144UF  2  METER  HT  1289.00 

SANTEC  440UP  HANDHELD  f 3 19.00 

KENWOOD   2500  HANDHELD       S299,00 
YAESl^  FT  208R  2-METER  HT  S  309,00 

VAESIJ  FT  70flR  440  HT  $329.00 

TEMPO  S15  2METER  HT  1249,00 

TEMPO  S2  220  HT  $249.00 

ALL  KENWOOD  &  ICOM   HE  RIGS   12% 
OFF. 

ALL   LARSEN   ZMETER  ANTENNAS    15% 
OFF, 

ALL  YAESU  &  TEN-TEC  HF  RIGS  15%  OFF 
ALL  HVGAIN  &  HUSTLER  ANT  30%  off 
ALL  MFJ  F^RODUCTS  15%  OFF  LrST, 
RADIOS  ANTENNAS  &  ACCESSORIES  ARE 
m    NEW.    FACTORY    SEALED   CARTONS 
FULL   MANUFACTURERS   WARRANTY 
PRICES  CASH  &  SHIPPING  CREDIT  CARDS 
ADD  3%, 


SHA  VER  RADIO,  INC. 

137BS.  Ba^om  Ave.  San  Jo^,  Calir  9S128 

408-998-1101  ^  ^^ 


CB  TO  TEN  METER 
CONVERSION  KITS 

KITS  lor  AM  -SSB-  FM  40  Channel  PLL 
chassis  conversions 
DETAILED  INSTRUCTIONS  for  easy  in* 
stailation  with  minimum  lime  and  equip- 
ment 

eANO  COVERAQE  flexibility  provides 
up  to  1  MHz  coverage  for  most  PLL 
chassis. 

PRICES  Low  cost  prices  range  from 
$6.00  to  $50.00 

All  kits  are  in  stock  jnclyding 
several  different  FM  kits. 
FREE  CATALOG  Write  or  call  today. 

^78     INDEPENDENT 
CRYSTAL  SUPPLY  COMPANY 

P.O.  Box  183 

Sandwich,  Ma.  026630193 
(617)  888-4302 


THE    PROFESSIONAL, 

TOUCH  TONE 


»■  •    i 


An  uttra  high  quality 
encoder  for  professional 
application.  Absolute  reliability  and 
function  makes  the  difference.  There'ia 
Pipo  encoder  for  every  system  and 
application.  Totally  serviceable,  easy  to 
operate  and  install.  Cail  or  write  for  free 
catalog  and  information!  (213)  852-1515 
or  P.O.  Box  343S,  Hollywood,  CA  90028. 


PATENTED 


*  ATfiT 


<pipo^ommunications 

BfTifx^3SiS  IS  on  Qu&itry  S  Refisbiisry    ^  500 


RED  HOT  SPECIALS! 


AZDtN  PCS  1000 

2 'meter  Traniwieiver 
AZDEN  PSC'300 

Handheld  Transceiver 
KDK  2025A  MK  II  w  TTmikc 
lANFl  QSA'S  l-metcr  PrMmp 
HhAKl  AT  ZlOXLScanner 
KANTRONlLS  Mini  Ctidicrc*dcr  Pkg 
AllMIJIThMS  12* 

TF.N-TltC  Argo^v  HF  Transceiver 
TFN  THC  Delta  HF  Tran^tceiver 
TFN'TFC  Omn\  C  HF  Transceiver 
NewS ASTFC  144  2 ^meter  Handheld 
New  ^A\  IKC  440  Handheld 
TOKYO  Hv  Power  2 M  Amp  HL.12V 
KANTRONICSF.D,  II  Codcreadef 

azdrn  pcs  2800  1 om  fm 
ringorangf:rarx2b 


$283,00 


283.00 
265.00 

36.50 
2 1  S.00 
247.00 
«  offliai  price 
465.00 
738.00 
1040,00 
297.00 
327.00 

75.00 
360.00 
283.00 

33.00 


Ben  Franklin  Electronics 


115'    NMain 


HillsboroKS  67063 


316  947-2269 


1^439 


'vw%  AjiAA  Aulomtfic 

TR-2400  Btr«lSc«nfi#f 

>  >*  Kent^ooa  TR-2400  &iop5  ind  locks  on  tHfsy,  O'  ^\<ipi 

^no  resuines  wri«n  cart4«r  Oropa    Co<nl rolled  by  key 

baard,  ng  svu)9c^e$  to  ackj.  In^Eal^s  easily  insids  ng.  six 

■implv  connections,  no  modnt^oalions    Does  noi  use 

Apacii  provided  for  PL 

Aasem&tetf — S24  95  Kil-tl<95 

TR'9000  Mem  Dry  Scanner 

JQ-r  Kenwood  TR-9000  scans  5  miiniorv  channels  Stops 
on  tjusy  and  resumes  VMiien  cafrier  drops  Uses  e)(^3t^ng 
conifOlSi  No  swiichta  to  add  1^ita^ls  aasjiy  Inside  rifl^. 
See  |>roducr  mvieiAr  Sepi  issue  7^  Msgazioe. 
Assembled— S30.95 

IC'-2B0  Bind  Scanner— S2B.fl5 

M  tmefy  Sea nne r — 139.9^         bolh  tew  t  S3 ,90 

*  Scanners  do  not  aHeel  nofmsl  rig  Qp*raliQR. 

*  Digital  readouts  display  scat^nea  irequency. 

'All  ju^vnniBrs.  are  easy  lo  ^nslaH  luein-g  qomplele  ami  d«^ 

(liled  mslallatidni  tnstruCltonA 
'  Ali  scanners  ASSEMBLED  &  TESTED  |eKc;^t  liit» 

*  Saiisiaciion  Guarainteedi 

Ser»d  cli«c>i  or  rnoney  OfiCief  to 


qSC^^N 


261 4d  W  Mary  Ann  Rd..  Acilioct>«  jL  60Q02 

inetMde  S1  50  postage  &  ti^ndlLng 
INIna^sres,  Include  &*/,%  «t«l&  tiat 


1^27 


S-LINE  OWNERS 

EfyHAAJCE   YOUR  INVESTMENT 


Mvith 


TUBESTERS 


TM 


Plu9'in.  solid  state  tube  ^^5placfimlents 

•  S-line  performance— solid  state! 
*  Heat  diiSipatfon  reduced  60% 
•  Goodbye  hard-to-find  tubei 
*  Unlimited  equipfnent  life 

TUBESTERS  cost  less  than  two  tubes. 
and  are  guaranteed  for  so  lomt  as  you  own 
your  Sline, 


>i\T  I  C^  Write  or  phone  for 

Box  535  specs  and  prices. 

Talmage,  CA  95481       (707)  462  6S82 


SHERWOOD 


CRYSTAL 

FILTERS 


R-4C^SHERW0OD 

STILL  ■!>£  RSESr  COMHNATION 

eog  HZ  LOWfLOSS  m  if  CW  filter.  In^prove  early  $tag& 
s«lecTi^rity.  Eliminate  h If h-p itched  leakBQc  around  2nd4F  Filiei^, 
Improv?  ultjrniile'  rejection  to  140  dB,  Flirni'nBtB  itroi^  signals 
over  load  Jng  3nd  mixer,  causing  iritaritKMl  and  j!itmnni\zat\on. 
CF  600/6:    SaO.OO.    New  PC  board  rolay  iirtfitch  kilr    S45.00. 

In  *F  SSB  FILTERS.    140  dH  uiL  raj,  CF  2K/fl:   *1S0.00  psfr. 

ShHi  Ul  IF  FILTER.  R»duc«r^iiiiic^t«f  QflW.  CF  5K/Br  S9Q.D0 

te4>OLE  R-4C  SSBf  fkag^in  filter.  Un«xcielied  tkin  telcctivftv. 
180G  Hi  at  -6  de,  2400  Hr  at  ^0  dB    CF-2K/16:  Sl3£,00. 

Z50,  $00  and  tOOO  H*  STOVL  2ntl\f  PLXfGlH  FILTEHSL 
CF  SSO^'S.CF  500^  wdCFl. GIG'S    SSOOO 

PC  BoanI  mod.  wid  iwm^nig  kin    SpeotAl  AM  Miafv'^detecfiir. 

FfH4ri  ^t»  tor  B4  IB),  ft-7,  TR7,  TPM,  StpcM/^Qne,  Aftaf. 

Add  S3  tfHppinf  par  order:  ^  owftfja  li«. 


ShSTift/ood  Engineering  fnc 

126a  South  OgdenSU 

Denver,  Colo.  S02t0 

(303)  722-2257 


fiJiS"  fll*^!- 


See  Ust  of  Adverfisers  of\  page  1  f4 


73  Magazine  •  June,  1982    141 


bILLIT  ELECTB«IICS 

P.0.B0X4aiZ44E    GARLAHD.  TX  7»)40    2U/27B-3553  '^'^ 


DfMinisday  Alarm  Kit    S9-9S 


i 

9  7  Watt  Audio  Amp  Kit    $6-9$ 

d  SMALL.  &INr.Lk  HVBRID  IC  A.ND  CyMF-QNEN  t !»  ^It  QUAi 

4  XT'PCBOfiifiD\mClU0E€i\fiUN&Or-iVJiiJDQ   Gnf^ATFOR 

4  ANY  pnoject  THAT  I4EED&  *N  IM€  XPtNSltf  E  AJWP    L^SS 

0  THAH    f'\    THD    Cpi   i   WAT1B     COMPATIBLE    WITH   ^tQX 

f  5QUt4DM1T 

I 

f 
f 

\ 


^Z  I. 


!n^,ijii»![:ilj^  Jvl^^^i'L-'ih^-   ^  ui 


14  c^' 


9TZ  Time  Zone  Clock  Kit 


fcsrmflil   HI  L  inour  f  • 


!■■'»! 


"at 


fHrervoltage  Protection  Kit  Sb>9S 


Fused  DC  iKiwur  bUL"- 


! 
I 

L 


.iiiiir» 


Sound  EfiSects  Kit 

^h^  aiE'Ot  iiQiJFHj  EllicEi  KITJ  Ml  '111  <tuv<. 

"  '    "  ■  1^    fOlj     -  ■         ...  Hill 

M-'  '  -J   JAd  Cvnpvate'   '.    >na>t, 

£9^  chipa  u  }£  iti. 


ELECtnONlC  MUSIC  MAKER 


THIS     UNmUC     KIT     GOhlAINS     A 

IflCflOfl^OCfSSQA  CW^*^  W(TM  flO*f. 

FT  HAS  BEChf  PROGRAMMED  ¥0  PLAY 

THE  FIRST    a    ro    iO  NOfJ^f  OF    THE 

TUht^  Li5t£a  aELOW    t:Oft&tituc' 

tKMf$  tmmis,  MfDPKS  Wftri  ANY  t 

oci  fi  OHM  SPKR  fJf or  mri^tuof-flj 
™C    KIT    WILI.    <?p£nArE    0** 
Qimc  on   uyjc  niTM  o^frCtwAj. 

1T7VAC»  JU£  €Oil^OM£irrf  4  JhOA«D 
Cnni^fli  HH    f1g^TiwiClOrnwr$l.3S 

WJ-    i^i    ^<  tJP««    ■    t#l«w  Ctv4«l^    ■    441P>nci 

■:—>»■  '  b*tAH^rt«*4  L>4      —  ■,  -f  -i|  H^i-iti 

V**nta>tiM«Hli  Miiitlh'ri'ta  kiii.-ni.    i  ...  l  .^•.E*  Ami - 

H-*m        aNt  *J<¥#    Tl»f   a...  t   liH'Bri^ 

M*'^4'i|i.Mk  r  •  !'.■  irnlr  M>t>  ■  -J  »hl*  I  ui  »*  "  T  h»  F  rtil "  ISaif 
ri»n»ifiit       hinhiiiit  Lu[lul|.r   ■    w^-ilniiFinliiih   Criim»   ' 


Regulator  Card 
Kit    $14.95 


'.ullElinMtth  hAw  hD«n  aCilfl  V.J'OCl'lq  It1l*ii  uwrt 

trw  tir|3oi«4(if   Liira  p'-  igiuuI 

VDMApi^   rtflUlnllQn   iind  M  inld 

tkaiJi.  cui  f  ipi  I!  MrtiPl  1^14^  Quiput  1  iJ.iii(i jM  i%  vtafal* 
l»  noHtV  ifOKH  P  Eo  20  AflWA  wid  *d|iiiut>l* 
batn  11  l«  It  Vtktt*.  Un;^fni^1&(tf"t*  1  '-•^n 

li^mr:^  '.    ".  -  -     H.  r .."  - 

fci,n  •      -  ■  ..T-^T 


f  •/VS': 


ae***^* 


i9Ji««*t  ftptvs  FC 


S14.K 


ItteHftAf  QH  ElAltj>  HIT 
vaUm  ^ffWCMT  PARTS 

11  KID  mn  .If  twt  centDifivi  orBd*       i3  so 


1 
I 

f 

\ 

i 


^. 


S£i'  I  Pkii|<lh.iu. 


TWHltlK" 


ij|»tUi3|] 

*5li    /T 


S|J» 


iniSfjBriiii 


CA30*0  TRANS  OOND  AMP 
TLO^U  DUAL  Bl  FHT  AMP 

ciN5«ecMos  *  mmacHim 

MC33ai  QUADOPAMPiHSE  i) 
FPT500  PHOTO  TRANSlSTOn 
TIP  IIUN^M  DARL  2 A  iC 
TEMP  CONTftOLLEtl  HOTPLATE 
5x10"  TEMPERED  GLASS  riQ-P 
!Ol60'F  1JB 

38&0(FS)  MICRO  P  CHIP  2.&fl 

10103SENSI 


^Start  ?/*t'  fHfwyrttr  right „.tfte3uivtnf{  u^y! 

DUAL  PHOTO  REsisran  la  dia       3/14 

At>ft1<l.  ttW 

^  PAGiE  UANlJAL  rilR  I^BCIVE  71* 


By  I-     . 

i^vimULiIri  Mi|i  iiH|.Mnil 

HtP  SniJlBlsillJiM*  e  pjt    m 

I  u  Pif  .  I 

'^w  rmmt  nti ni  ii  PC '' 


4f<!  Smcr 

.=1  MfiTfii^ 


il'l-  llMlljllIf    111! 


ia\.cit\ 


V  III 
Jtt 


.St 


I 


^UPEH  Si 


DEAL' 


1  :iO  ea 


imii«<^ 
J 'a  so 


iimt-i/ 


OnDEn^Nt^  IHFOPMliTtON 
C#lt  or  UfrEt«  Fo*  Free  Cfttaliig 

r^ti  uifttiiuii  mecr   *  «on  uj:^  mw  cocrs 

'    M  HAHOLiMO  Oi*  OJIUtt^ES  UNDER  tlO  DO 
.1:.*    MC  CARDS  «3in  CHtCK 
AtTO  i^'-Fon  5h4IRt»iNn 
1«KA1  nESItlEHtS  A 13 LI  ft".  STATt  &ALES  TAJi 

ftLi  rottEiGN  onnEWS  AiiiJ  j5'   Fun  SNrPPFl^a 

iriANADAI^'^  NO  FDNtlUN  CODS' 

<:au  i3Ui  37a  isa.Ti  to  pi  Act  credij  camo  on  t^n 

nnrlFn 


TJVE  GATE  SCR     31.Se  ^^^^^^^^^^^^^^^      '  p 


Your  Ham  Tube 
Headquarters! 


protects 

solid  state 

oommuoications 

equipment 

from  damage  caused 

by  high-voltage 
transients  entering 
the  antenna  system 


TTiese  transients  usuauy  are  caused  by 
atmospheric  static  dIscMrges  or  nearby 
lightning  striken. 

Th€  n«w  Model  1549  Surge  Shunt  can  b€ 
used  with  both  receivers  and  transceivers 
having  up  to  200  watts  output. 
Convenient  UHF  type  coaxial  connections 
are  supplied.  Price  is  924,95 

The  arrester    pill    element  has  a  long 
hfe.  t>ut  can  b«  easily  and  economicaity 
reputed  If  necessary. 

Crecft-Card  nuyers 
mav  cam  mti  Um 

l-aO0-&43  5612 

In  Ohio,  or  for 
information  call: 
1513^66  2421 


i«^>J  DRAKE 


R.  L  DRAKE  COMPANY 

540 Richard  Stftjtt  Miarnisburg.  Ohio 45342 

IttSTfTUTiONAL  AMO  DEAUN  INQUIfllES  iMVrtf  P 


TOLL  800-221 -0860  FREE 
TUBES 


2-*aai                  fas  oo       udi^ei  i  i% 

*^i£)KiA                         |»W         Tr»A  »» 

4CU!tl3ft                  ^t^m        It^  rf  50 

SaUU        liSA  1D*^ 

%%2.m        MA]  172  50 

not  10.SO 

E.F  JiQHf4&0M  SocliBtt  ro4  4CX21iClEI  &  4  400A    i  fft.JK 


SEMlCCNDLlCTOn& 

MRF  24&^SDU16     S30.D0 
HRF4M  lia&5 

MflfA$$  tt^bD 


MRF  «44JS^1(WS 


119  » 

1  ts 


Hf  CONN^CtOAS 

PL  ?S9  lO^lA.ftS 

PL  tM  10/U.H 

UG  rTSfira         tcvi^  ea 

UG  35S/U  f  2  M)  •■ 

uo  irm         12  » «« 
M  isa  %zmm 

M  »0  f  1  rs  M 

Tfpt  --fr  tnsl  en  4^G4oUi 
i4F5 


rOP  BRAND  Popylar  Receiving  Tube  T ,]; . 

FACTORY  BOXED  75/80-*  OFF  LIST 

FBEE  UST  Available 

tnclucJes  IljII  line  of  RF  Power  T^ans^stors 

Minimum  Order  $25. 

Allow  S3  00  Minimum  for  UPS  Charges 

Write  OF  phone  for  fre^  catafog 
TUBES-  BOUGHT.  SOLD  AND  TRAOED 


I 


CeCo 

Since  1922 


Premium  Prices 

Paid 

For  EIMAC  Tubes 


COMMUNICATtONS,  Inc. 

2115  Avenue  X 

Brooklyn,  NY  11235 

Phone  {212)  B4B-63QQ 


v'^i 


RF  MODULATORS 


3V  1 1  ■  1  » 


Only 


49.95 


•  CHVSTAL  CONTROLLED  FOR  STABILrTV 

•  IC  CIRCUITRY  FOR  EXCELLENT  ftELIAaHITY 

•  EJCTEftNAtLV  SWJTCHID  FOR  CHANNELS  3  or  4 

The  VM-1000  RF  ModuJ^lor  n  ttie  sflm«  lyptJ  ^nd 
quaEiTy  of  thOBE?  taund  in  todn/a  video  tap^e  rfH:ciTdi3r&    ii 
hag  conyenJtnt  pnono  |flck5  for  Hfirtefiendnudiu  inpifts  nnd 
has  A  siattdard  "F  '  typeconrsei^lQi'  fflf  RF  Qutout   Power  i* 
■  €d  by  an  AC  to  DC  <ic%  w^nicri  »!»  included 

1.  rn-'  -'nOW  lo' moire  infoi'tiiiti:%> ' .  j-rni  (o*  (luantilv  discounts 

JJT  DISTRIBUTJNG  1^25 
17210  Yukon  Awe..  Suite  ^^ 
Torrance.  CaJit,  90504 
Call  COD  Orders  lo:  (213)  515-&800 


IT'S 
INCREDIBLE! 


QDE7H^'ac 


Master  code  or  upgrade  m  a  inatter  ol  days 
Cod«  Quick  is  a  unique  break Ihrough 
wtuch  sirnpiih^^  learn ing  Morse  Code. 
Instead  of  a  confusing  ma^e  of  dits  and 
dabs,  each  letter  uvill  magically  begin  to  call 
out  its  own  nan^ie!  Siyp  torturing  you r self f 
Your  amazing  kit  containing  5  power- 
packed  cassettes,  visual  breakthrough 
cards  and  ongirul  manual  is  only  $39^951 
Send  check  or  money  order  today  to 
WHEELER  APPUED  RESEARCH  LAB. 
P.O  Box  326L  City  of  Industry,  CA  91744 
Ask  im  Code  Quick  «103.  Caiilomia 
re^dents  add  t%  saks  tax. 

One  User  Comments: 

'*Br5l  new  idea  m  code  study  and  the  darn 
thing  works!  So  much  fun  you  don*t  realize 
how  much  you're  learning." 

M.S.  Greneda,  Miss. 

Huncireds  of  satisfied  customers! 
You can'l  lose!  FoQow eMch  simple  step  You 
must  succeed  or  reiurn  the  lot  for  a  lotaj 
immediate  refund! 


m 


o 

a 

o 

CO 


LU 

E 


YAESU  FT-207R  OWNERS 

AUTO  SCAN  MODULE  AND  BATTERY 
SAVER  Kit 

15  minutes  to  in- 
stall scan  restarts 
wtien  earner  d^ops 
otf,  busy  switch 
conirois  auiomatic 
scan  on-off;  in- 
cludes module  and 
inslructJons 

ModetAS-1,  $25.00 

r^      FT207R  BATTERY  SAVER  KIT 
S^  MODEL  BS-I  $14.95 

'No  more  dead  tiatter^es <tue  lo  memory  tjach- 

up 

'30*e  le^s  ppwer  drain  when  squetcfwed 
'Sample  to  mstafi:  stepby-stap  instructions 

aiKl  pari 5  included 

*A  mA  memory  backup  reduced  to  500  lA 
'45  mA  receiver  d:rain  reduced  to  30  mA. 
^Improved  audio  Mdeiitv  and  loudness 

ENGINEERING  CONSULTING 

RO.  eox396e  -"^^ 

ANAHEIM,  CAUFORNiA  92B03 


142     73Magazine  •  June,  1982 


sample  tssye 

only  12-50 

PPD 

OURIfTTH  V^AR' 


AMATEUR  TELEVISION 


MAGAZINE 


y^   1!5 


■  I- OH  THE  SPtLUU«;tn;0MA«INIC,%nO^  R^UIO  AHATtUll- 


Surface 

Surfaces 

Airmail 

Airmail 

US/Canadi 

AM 

Central 

All  Oih«r 

Maiico 

Foreign 

S-  Am«di^ 

F^r^lgn 

year 

$  10  00 

£  13  00 

$  20  00 

£  ^aoo 

rear 

*  20  00 

S  26.DQ 

¥  40.0G 

S  4B0O 

■ftfBT 

%  ^00 

S  50-00 

t  TS-DO 

S  SO  A 

jr 

S  5600 

S  74.00 

S  116.00 

Si34  0r 

AFV  SS  TV  FA  Jf^TTT  Sal#//il«s-EME 

Puttished  12  tim^s  per  ymt  bf  Mike  Stone  W&9QCD 
PO  Bojs  H.  iowden.  hwn  52255  Q408 


NEW  AUTOPATCH 


Now  at  last,  *u^  autopatch  Jesiged  lur  Uic 
Si  '^phi  St  ica  led  FM  Ama  leu  r  "  1 '  ri v  a tc  Pa  fch ' ' 
wnrk^  through  existing  ri^peaters  as  well  .is 
s^iiiiplex.  Gives  you  access  to  your  hniiii^ 
jihtMic  within  the  coverage  area  of  an)' 
si'lcxted  repeater.  "Private  J'atch"  ri.»qyirc^ 
no  nxxiificalions  lo  vour  base  FM  transceiver. 
Connects  only  lo  MIC  and  speaker  jacks.  Con 
ver?ia!ion  is  ven*  natur^  because  "Frivafe 
PiiU'h"  does  niit  U5ie  the  saniplini^  technique. 
CW  [[>  sends  your  call-  Five  digi!  owner  pro- 
granunahle  access  code  and  operator/long 
til  stance  inhihtt  protect  your  phone  bill.  Self 
ti>nt£iijied  AC  supply.  No  Ume  ennxiers 
reijuircd,  M  CMOS  digital  logic,  no  aria  log 
timing  used.  Giinjjare  our  standard  features. 
Send  for  additional  information. 
Available  in  spring. 

Auto  Connect 


Box  4 1 55 
Torrance.  CA  90510 


^130 


CiJMPOil  CiP-tl 


NEW! 


^uttpp  AitcmlNlT 


Aluminum  Pole 
Altfi^iblf  10  It    king 


AiH«btt 


■T 


»  a 


iTl    ^i  ^4'   ! 


GP  -81  GINPOLE 

Ftii  dll  popular  toiveri  I  ■  O  D   i« 
I  *  OS  lw||» 

Stronq  mf^'\4^'^i  1l«cl  tcntlrwflian 

Hen  dijppvd  pkcitpj 

ei#ad  Mt  InlfJ  irl  1:10  lb* 

Will  tvii  e  Mrinti* 


purchoiin^    the   IIX    fquipprkPi^ 
GINPOLE  o>rr  ovajlcibl« 

MBtHpdl^lJ*(if^lWiir  CPIt.  Kii  GINPOLl 
1ncli*4r*   pull«v   and   clomp   ait^mblK-i 
lihwH  tan  raulv  b*  tlhi>p»d  UPS 

Ttte^  euilDm*4  p4<r£iiiiM"i.  ih»  p4^T  4«[fi44T 

MrltmJ  111  Pu^hoM  CP  11. 1  CINPOLE 
Ffv*4hl  FOB    Otik  lawn    l|   tl)9  5^0 


^iiJA 


AMP  LETTER 


{%n^   LET    Tllf)    n 
publ  icjition    d«v 

j^Our    riigjit    ampl  I 
3.    A   source   of 

The   fi«P-L£TTER 
It    U   erganlted 


1 .  An 
Oled  ti} 
ticrfi   of 

ttiit  ca 
fier  con: 
p^  r  1 1    a  II 

1  s    piJ  b1 1 

IhtD    fi 


AMltttir    Sa^io 

tihe  tft&l^n,   conttruc- 

n    s>avp    yau    nanty  on 
^truc  t Ion    project  . 
d    inforiDatiDn. 

shed  and  mailed  First 

{17    t  imes/yea  r) * 
Vf    rlE-partmeTits: 


I    Editor's    Corner 
J [    Lfrtters 
111    T«cf)   Topics    &    Tips 
IV    F«Btur#   Article 
\f   AMP- Lf ITER    TRADE*r 

The  A«P-LETTE»  btlfeves 
•  n  4$ip  cin  h%  fufii,  educ 
if    COSt'Tjr    d$    bgylfig    a    c 

A  &fi*  ye^r  rubier  fpt  fan 
f*    Sia.00/ye4r    fl?    i ssu 

Wdgaftrit  and  you  ma^  su 
one   Hirre   rate  of   S15 .  QD 

DON^T   KISS    A    SJNGLE    ISS 


Have    parts   to    se! 1  ? 
flun   an   ad   in   tne 
AWp-LETTIft    TBAOER. 
Subscriber   rate    it 
lOc    per    word. 


titit 
at  ion 
OBBir 

to  C 
Bt  ) . 
bscr  1 

/y«af 

UF  nr 


fit    aftd    fid  I  f 
ciaT    awp. 

h«    AMP-LETTER 
Mention    "73" 
bn?    at    tfiB   speciil 

THE    ftf*P-LETT|fi 


At<P-LETTER 
^^2   doK    39A 
Thoi=tt50fl¥  i  1 


PI  act    i  ri 
id,     lOe/HEjrd 


S«it4    f?.QO   for   4    i&ait;!l«   cop^^    iir    SIS 
foi^   A    full    )^r«r   of   tlie   ANP-LCTTER. 


m 


^%1 


C'l^K  I II  IKIHN  IT- RN ATIONAI 


NQ  HUdi  ADJUST  SAVINGS  FDR  VQU 
ON 

CUSHCJ^AFT.  HUSTLER,  LAJ1S£M.  UMAQILLA  BELDEN^ 
TOf>nft««EUl.  SiGNALCRAFTER.  PAiOWAR.  MVE-VIKfNG. 
TmCM¥X,TnAC  JAI^EI^  BENCHER.  VieRO^LEX. 
AWPHENOl^  GOULa  DURACELL  WELLER  AND  OTHERS 

QSrS  CUSTOM  MADE        ALL  CRYSTALS  frtiin  $4^00 

H  ID  10  KBlir  tSmtvtrtlons 
ilir  CEITtHEO  DflHHUIICKTIOM 

your  rifi  ffom  t4S^  New  ircrfn  ul  f  ftMn  S17P 

«<  tH,  AT  OVEP  TO  IHOHS  A  V£Afl.  CALL  OH  WAlTE  FOR  QUOTI^ 
CATALOCL  INFOAMJiTlOfL  Q&L  SAMPLES  CU  wml 

CALL  COLLECT  TO  ORDER 


.^321 


WE  VtlLL  MOt  B£  UNDEffSOlt} 

SEE  you  AT  GflAJ^iD  ft  API  0$,  CfUNCETO^, 
SANTE  FE  PARK  At^tD  MtDLANO, 


n*^ 


NEW 

DX 

ANTENNAS 

QUALITY -ECONOMY 


WE  MANUFACTURE: 

MOt^OBAND  YAG)  BEAMS 

TRI  BAND  YAGI  BEAMS 

CENTER  INSULATORS  -  BALUNS 

DUMMY  LOADS  -  AND  MORE' 

All  DX  products  sre  fulfy  guaranteed 
Send  large  S  A.S  E  for  free  catalog 
Dealer  inquiries  are  welcome. 


IIX  9ili|iial  C*. 

I^.O.    iOl   ?7^   lacpn    11  41540 
fhon*   I ^d 9  I  346 -lot  7 


^*l^ 


<  \   It  Ml  II  t)  I'M!  »t\  \IIO\  \l 


I- •'I—T10K  -    VI I  AiMlJ 


NUTS  &  VOLTS 

BUY  <  SELL  •  TRADE  ELECTRONICS 


Have  Your  Own 

PERSONAL 
ELECTRONIC  SWAPMEET 

neiivered  Evety  Month 
ONLY  ^5.00   IN  U.S. 

FOE  12  Issues  OF 
Nuts  &  Volts  Magazine 

Send  To: 

NUTS  &  VOLTS 

P.O.  BOX  1111-G 

PLACENTIA,  CA  92670 

(714)  632-7721  ^i37 


SAVE  90% 


YES  you  can  save  up  lo  90%  on  a 
cofTipuler  system  of  your  own, 

£150.00  buys  a  4MH2  Z80A  with 
64KB  &  a  real  Front  Panel 

$200.00  buys  a  Full  Function 
24x80  CRT  with  Keyboard 

>bu  can  ha^e  your  own  computer  and 
be  running  Fortran.  Basic.  Pascal.  e(c 
If  you  gtt  our 

FREE  BROCHURE 
TODAY 

DIGATEK    CORP. 
Suite    50A 

2723    W.    Butler    Dr. 
Phoenix      AZ      85021 

ROLL-YOUR-OWN  TECHNOLOGY 
AND  SAVE  A  BUIIDI^ 


D^-Hote^fl 


*5tV!«   wide   Uof  fc#d/Ccnf  trfs«d   Columns' 
•1&9   the   entlft  01   C^TUifnf 

"L   '"■    •luro-    •)rd   PMrtf^    ^Hei;  ipr^c^l    iicvntifig' 
*tAiit  Conti*c«f      *Ua  l0fi«'      «Cf)  £«nvt 

n^titudie'       'Lcin^itv^t* 

?l^l    iBfu  coaputtfd    for   rotiB  [jiw» 
*TllBE    fnne   &  I  ■ff  wr#ni?ft  '       'Prypiyj  l  toir   f*ciu.r' 
*D1 stance    in    R t i omtters J      *Olstince    m   HpU^sP 
-EXACT    Sejm    H«*Btfi9i    -    [hdudiTii   DX    to    fou! 

(:np>    CcMPl^tt   Pf«t4  4   ind    N«ii«   au1d?«( 

190*  Csiititnei    «r«    imt^fltd   «ipA»be't  tci  I  Ijr 
pi- Wales  id*  tic  ironrk  -   TOti  da   ihit  Dl-tfif 


URD    C^n,    KJae,    l^ddrrft,    ria«    fafiF^   C^TH    liifw 
iLttilM^e  i   ioitqitudr  OR   Dlrt-cUDn   1   Diitani 

Ffoni   i    fi?*r6/    tOdO   ta   four  (JfN)    and    %l2.'iQ^f^ 

TDr  0»?,'        Cilt    ttAwATTi 

RiindaTI    Shtifirtfln    KH6HD       fS&S]    877^?3?l    (IS-O??) 

Kjtiulul*    «d«U    H***1»    967^1?      Ifli*      "flC        *^  147 


^Se#  irsr  o'  AtjYeffisers  on  o^ge'  J  w 


JSMsg^iine  *   June,  1982     143 


RAMSEY 
ELECTRONICS 
-'62  Inc. 


PARTS  WAREHOUSE 


We  now  have  available  a  bunch  of  goodies  too 
good  to  bypass     Items  are  limiled  so  order  today 


2575  Baird  Rd. 
Penfieid,  NY  14526 

716-586  3950 


MINI  KITS  -  YOU  HAVE  SEEN  THESE  BEFORE  NOW 

HERE  ARE  OLD  FAVORITE  AND  NEW  ONES  TOO, 

GREAT  FOR  THAT  AFTERNOON  HOBBY. 


FM 

MTNI 

MIKE 


A  super  tnqt\  pettormwncm  FM  w^re- 
jnt  mike  liiit*  Trari&nnif&  m  $taDlfl> 
ingrial  up  \o  300  i^irds  wtth  tactp- 
horiai  aucti-Qi  q.!jA!tty  by  itii»afi$  ^f  lU 
buift  in  f^kclrei  mi^e  Kit  unc^Ltdvs 
caie  rT>il[«  Dn'offs«ntch  Anrcnni 
EMlTery  a  rus  super  iftsttuc  tt omt  Th«$ 

fM-3  Kit  114  $S 


Color  Orifsn 

See  mus^c  come 
aliv©^  3  different 
itgli}^  flicker  wilh 
music  One  light 
each  for,  high, 
mid -range  ar^d 
lows  Each  Tfidk- 
widuaily  adjust' 
able  dnd  dfives  up 
ro  300  W  runs  on 
110  VAC 

Campiele  krl. 
W.9S 


Vi«l«Q  Mudulitcir  Kll 

Cqnwerts  3ry  TV  Ira  tf«dlJ&  mo-nitOf  Supei 
itable  lunflblfl  ovmt  cti  4-S  Run&  do  5- 
T5V  Bcc#pts«ld  viftikomgniF  Bcalumlon 

lh#marKe|i   CompiHlp  lit   VOt        iT,»5 


ted  a  I  Ink  y  K II 
A  great  aiienhon  get- 
ter  ^hich  alter  naltly 
nasties  2  lumbo  lEDs 
US€  for  Ti«me  badges 
buttons      nwirnpniQ 
psnei  lights  ar^fthm^ 
Runs  on  3  to  t5  vOlt& 
Complefe  kit  BL- 1 
$2.95 


Super  Sleuth 
A  super  sensMivfi  ampi i  ■ 
t(©r  whhcti  wtll  pich  up  a 
pin  drop  at  15  fe«t'  Qf<^^i 
lot  monEtofing  baby  % 
room  or  as  Qeneral  pur- 
pose ampliilief  Full  2  W 
rrr^a  output  runs  on  g  lo 
15  vijtti  uses  S-45  otm 
spealker 
Complete  fcrl  BN9 

15  95 


Cf»04 

fiuns  Of!  3-t2  Vd^  t  wait 


oui.  1  KHZ  ^DQ^  fO'  CPO 
Complete  kii  ta  95 


Cal^  Yeur  Ptione  Ordef  in  Today 

TERMS:  Satisfaction  guaranteed  or  rAoney 
fetui^ded.  CO  D  add  S2.00  Minimum  ordef 
$6  DO  Orc^TS  under  $tO  00  add  S  i  50  Afkl  5* « 
lof  postage  msu ranee,  handting  Overseas 
add  15'     N  ¥  f&sidents  add  7%  laji 


CLOCK  KITS 

Your  old  1ivor|it«t  «rc  hvnt  #g«lin.    Over  7.QO0  S«ld  Iti  Dal« 
Be  one  oi  th«  gang  and  order  yours  todvy! 

Try  your  hand  at  building  the  finest  looking  clock  on  the 
market  fis  sahn  finish  anodized  aluminum  case  looks  great 
anywhere,  while  six  4"  LEO  digits  provide  a  highly  readable 
display  This  is  a  complete  kit,  no  extras  rueeded,  and  it  only 
takes  1-2  hours  to  assemble  Your  choice  ot  case  colors 
silver,  gold,  black  ( specif yl- 

Clock  kit.  12/24  houi,  OC-5  S24.9S 

Clock  with  10  mm  10  fimer,  12^24  hour.  DC-tO  $29.95 

Alarm  clock,  12  hour  only  DC-8  |29  95 

12V  DC  car  dock.  DC- 7  $29.95 

Far  wired  and  tested  clocks  add  $10  00  to  kit  price 
SPECIFY  13  OR  24  HOUR  FORMAT 


FM  Wirvleit  Ulika  Kit 

Trarvsmds  up  :o300  to 

any   FM  bfoadcasT  ra- 

d^o.  UEies  any  type  of 

mike    Runs  on  3  lo  9V 

has  added  sensitive  mik*  preamp 

staqe 

FM-1  kil    $a,9S  FM  ?  kit     S4JS 


Type  FW-2 


Wmsper  LIghl  Kll 

An  interesting  kit.  small  mike 
ptcks  up  sounds  and  converts 
tfriem  to  light  The  louder  the 
sound  Ihe  brighter  Ihe  light 
IncTudea  mfke.  controfs  up  to 
300  W  rurts  on  110  VAC 
Compipit^  k'1,  WL-1 
$6.95 


Tona  Deco<f*r 

A  complele  fOr*e  deco- 
der    on    a    single    PC 
board     Fijatufes    400- 
^OOO      Hi      adjusiabie 
range  via  20  itirn  pot  voltage  regu 
lalion    567  IC     Useful  for  touch- 
lone    burst   detection     FSK.    ptc 
r-^n  fiiHO  be  used  as  a  stable  lone 

I    ..  !■■■     Rlfhs  on  5  to  12  volts 
Complel*^ +.ir   TD-1       S5.SS 


Car  Clock 

Tfir  UN-KIT.  tml^r  5  toltfer  Cdnnectioni 


Haf#s  ■  njp«  ^ooh^n^  mqigrt^  nvd"  jicryrete  *uto  ciof  h   wftfCh  i*  a  sfiap  to  lauiirt  .ma 

inH»l't  Cioct  movi^Twril  <»  tCJ-niplciely  as^^JmhlFri  -  yfJii  Ofsl^  ic^id**  3  wJftS  AfilJ  ? 
1i*Mchff5  lakes  «fci-OMi  '5  rrnr^uPi^K''  Dispiav  ib  briiitil  qri>i«n  (Wh1*i  ^M^omnliC  bnghlfflta 
CDntfoi  phoiocpti  -  aifioF^ti  vuij  p^  a  h^ffUly  r-pi^rlnhlR  dmpijiy  tiav  Di  nacfht  Carrnt-s  m  m 
i9]m  rmish  an.Ddiiei^Jilu'mtnijin  cN^pwHrch  can  hf!dll4ir:ticd^difti!ii<*nl  wayiLnsimg^iidefl 
laps    Chojce  ot  5ii¥#^  rilicli  or  flolrf  cbs*  tspeoifyj 


DC-3  kll   12  hour  formjil 
DC -3  «nr&d  anrt  leilHil 


Ul^ivvrifll  Timtr  Kll 

Ptovides  The  bajiic  paiit  an><d  PC 
I'd^  FfiHquiri&d  id  provide  i  iOutce 
Oi  precision  riming  and  puise 
generalion  Uses  £5^  iirr«f  }Q  ancj 
includes  a  range  of  parts  fat  itkhi 
timing  n^^ife 

UT*s  ntt  IS  fts 


Mad  OJaster  Kii 

Produces  LOUD  »ar  shattering  and 
allentitiiT  ^lir^g  sirtrt  Uke  s^und 
Can    supply    up   li?    tS    watt^   of 
obnotiQus  oudto  Runs  on  6-1^  VDC 


Siien  Kii 
Produces  upward  antl  downward 
wait  characterii&tic  of  a  poMce 
siren  S  W  peafc  audio  output  tvn^ 
on  3-15  voUs.  ifses  3-46  atim 
ip^ftker 
Complete  kff  SM-:;  S2.95 


Calendar  Alarm  Clock 
Thectdck  thats  9dI  tt  aI»  &-  5'  LED&. 
12  ?4  hour  snoof?  5*  rKjur  alarm  4 
ytar  calertdar  batn^ry  backup  and 
lols  more  The  sup^r  700 t  chip  fs 
use*}  Si^P  5t4tj.rtct>«  COfnpl«te 
ii<{  ief£  case  (not  avail ftb^i 
CH:  =^  t34W 


Undar  Oath  Car  Clock 

I  ?  7^  hfh.iF  ( loch  rfi  $  ^wflulfFuf*  ipiastic  oft»  leaPiiPfn 
J  A^t  l'4<(liiiD'   dN«Dk|«i  [Manki  ■■IPr  ■^mlwxi    i^-rf 

j^  r.      ,.*.,-..  r-mtf*  samiji 


MB-1  Kff 


S4iS 


tf  » 


*T< 


PARTS  PARADE 


Vtdcq  T*nfHfial 
tii  brcBnw  a  ru^nfM^f  ••Pii«n#i  nmk*   f  ii«id'n-.«»ft  m'^q**  ^V  ^ 
~c^ti  and ^mf 0n  «^  ■    •■  "■j.**ii«*," 


•   Pit 

113  ts 
fUM 


IC  SPECIALS 


LINEAR 


30t 
5«& 


«» 


5iT 

Tai 


9iU 


I   3S 
11  «) 

ttoo 

It  00 

tioo 

St  2'3i 
t   » 


4511 

441  a 

M39 


CMOS 


50 
ST. 85 

50 
$9.00 
$2.00 
S1  35 
St  75 


READOUTS 


TRANSISTORS 
;»^vi  *f       i»^iai 

.-',**^     ,.  :^'F       is^n 

?NM«»  PUP  C«^F  YM1  n 

iiM«ii*rTc>r  vfi  n 

;«4c?i  c-F  «''Si  m 


TTL 


/44/ 

7475 
Ml  96 


$  .40 

I   50 
$1  35 


SPECIAJ. 


new 

7207  A 
T?l60 

no7C 

S3 14 

&375AB 
7001 


$15.00 
$  1.25 
$17  50 
$  5  K: 
$21  00 
$1250 
$  295 
S  295 
$  6.50 


FERRITE  BEADS 

With  li^lrj  atifl  ^pn-t        IS/11  00 
fl.  hiQlti  Bjlun  fiiads.        VH  OQ 


Sockets 

a  Pm  10/$  2.00 

t4  Pin  10/*?00 

16  Pin  10/$a.00 

24  Pin  4; $2.00 

2e  Pin  4/ $2.00 

40  pin  3/ $2.00 


Oiodci 

5  1  V  lener  20/S1.IXI 

ifsr9T4  Type  5Q/f1,00 

IKV  2Amp  S/$1.00 

100V  lAmp  15/11.00 


#Oii»  1»  M^  4t3m 

MtJS 

f^OMi  T^  PMP  «IW 

%fiM 

M#t  to?  TNSAftI 

SJt 

Nm  IHH  T}«|H  T'R 

ii^tSH 

P«P  ms  »«»  T^a 

la^tu* 

ntsosa 

•  w 

7tw»4«UJt 

iJtai* 

■ta 


25  AMP 

10QV  Bridge 

$1.50  eftcti 

Mini-Bndge  50V 
1  AMP 

2  for  $1.00 


Rfrtislor  At»  1 

AasoflTiient  oT  PopulaT  waluGSi  -  . 
Will  C u J  lea d  f 0 r  PC  m ou nt I ng  '-'" 
H:eMr^:?r  \*r  teacrs  b&g  of  300  or 
mora 

S1.50 


Swilchei 

Mini  toflgie  SPDT  |1 ,00 

Rfifl  Pushbuirons  N  O        3^11.00 


Cafphonei 
WCffliilirs.  a  _-       '  i   "ic" 

5  for  $t.DO 


fcp*  Jot  *Kj.^»  fTtoig  etc 
3  'm  tztn 


CryilAlm 

3  579545    MHZ  11,50 

10  00D00    MH^  SS-ftO 

5  248800   MH^  IS  OD 


AC  Adbpl«« 

Gooit    io*     ctocNi  nir.wrt 

»  S  irdc  (fi^  20  mA  Si  QO 

'  ^      ^     '?  »OmA  11 M 


O^rtput  «n  1-19'  vi^  «^  tQ-30  «*^*r  Tit 
-afPifit!*  $194 


$hig  Tuned  Coils 

SinaN  3'16     He>  Shigs  ium««f  con 
3iums  10  lot  $1,00 


AC  Outtel 

f''»ne4  Mcjj"!  *fi«^  LvAds 

411  00 


CAPACtTOnS 

TJkHtAituii 

t.5  uF  ?5V  3/$1  00 
1,6  uF  25V  3/S1  00 
,22uF25V3/Sl.0Q 


4LUVIHUI4 

EkKitoivr< 

I'OOO' Iff  ir-v  i!i«.,„i  ifiB 

MO  .ji  ;  I  ^ 

1^  ijf   lit,  ;,.„  i.-tl  00 
tOuF  tiVnM'ilia-ltOfl 


Dl&K  cf  a*Mic 
01  teviHn    »it  00 

1  1«V  IS  It  00 

aei  lev        »  It  00 

iCCoF  20  It  00 


PC 'DC  CDnv«n»r 

1 5  i»dc  irtpul  prod  -9  ifldc  Lit'  30rna 
>ayncpi'eaMti;s-l5vrfCfB)35rnfl  11,29 


IW   30  Turn  Trim  Pot    %  M 


Geramir:  fF  Filters 

Mini  ceramic  titters  7  kHif 

B,W  455kHE  Jt  5{>ea. 


IE 


Triimnar  Cape 

SpragufT  •  3  40  pf 
Stable  PolvpfQpyi#na 


Audio 
Preioaler 

Make    high     resoluiicn    audio 

measurments,  great  for  inusicril 
msrrument  tuning.  PL  tones,  eic 
Wuitiphes  aud^o  UP  ^n  frequency, 
salectable  kIO  or  xlO€.  gives  01 
HZ  resaFution  Mrirh  1  sdc  gate 
ttme'  High  ^ensiin^ifv  of  35  mv  1 
rrveg  input  i  arpd  buittirF  liltenng 
gives  great  performance  Huns 
on  9V  iMtlery  Ml  CMOS 
FS-2  ktl  $29.95 

PS-2  ¥irtre<i  $3a,95 


600  MHI  1  J 

PBESCALER  W 

Extend  ihe  range  of  your 
counter  to  600  MHz  Works 
with  all  counters  Less  than 
150  mv  sensilivily  specify  - 
10  or -100 


Wrred.  tested, 
Kll.  PS- IB 


PS-IB     $5995 
$44.95 


30  Watt  2  mtr  PWR  AMP 

Simple  Class  C  power  amp  features  8  times  power  garn   1  W  m 
tore  out.  2  Win  for  i5out.4Winfor30out  Maxouipuiof35W 
ir>credible  value,  compleie  with  all  parts  tess  case  and  T-R  relay 
PA-1   30  W  pwr  amp  ktt  $22.95 

TR-1   RF  sensed  T^R  feiay  kit  6.9S 


MRF-23fl  iran^isior  as  iiiad  m  PA-i 
6  lOdb  ggiin    15Q  mh;  $11.95 


RF  actuated  relay  senses  RF 
(1W)  and  closes  DPDT  relay 

For  RF  sensed  T-R  relay 
TR-1  Kit     $6.95 


Power  Supply  KM 

Cotnpitie  Uipia  legulaied  power 
syppiy  providii$  v^anablB  Bto  TBvgll^  at 
;?Ot)rnHnPid  *&aM  Arnp  £»c«HenTroad 
reguJahon,  good  fitte^'ing  and  smalt 
Biz e  Lefti traniif ormefs  requires 63v 
i«  1  A  and  Z4  VCT 
Ccimnlam  kit  PS-3LT  $6.95 


Cryifal  Micraphofit 
Sm.iii  t  •  diameter  '#"  thurk 


Coax  Connector 

Chassi'S  mouni 

BN€  typ«  $1.00 


Mini  FIG-1T4  Coax 
10  fL  tor  $1.00 


t  Van  ftsttwT  cnpf 
HKm  cluai'i'r  riips^  s  lor  ii  00 

S    nubfrvr  GfO^iTsets         TO  iof  11  QO 


cm  iff  impo  tiaaiQ  MflfSQO^i 


Corin#clDni 

":jmcQ«ucm  lo* 


L*dii      yoyr  c^ho4ce.  ptecse  tpKify 

Mirv  R^^  Jumpo  Hed  l^^glt  Intenady  Red  Ulummator  Reo  $/$! 

Mtni  y  pi  low  Jumbo  Velio*  Jumbo  Gre^n  t/11 


V>r*ci9t« 
MolQfGia  MV  2200  30  FF  Nominal  cap  ^  to  Pf 

.IDaaefret  3/ti.0O 


Tunable  rangf» 


OP -AMP  SpffciiM 
BI'FET  Lf  1 374  \    Difect  pm  l€>r  pm  74 1  compatible  bul  500.000  MEG 
input  s:  sup«r  low  S0  pa  input  currefil   row  pow«r  d'atn 

50torim»r        tt.OO  10  for         S2.00 


7&MG 
71MG 
733 

309K 

7aos 


$13S 
|j50 

$1  IS 
SI  00 


R«gviafoti 


71 1? 

7«15 

7905 

79fa 

rets 


11-00 
SI  00 
$125 
$125 
f  1  2S 


ShfirrlN  Tubhni^  Nuba 

HtCt  pipe  at  ppe-^  CJ^   i?-ir.5-.i    iij*     1       ■      ► 

^tmk  %Q  9"   Qttimt  tern  tpiic**      Mktl.fM 


Wfii  TO'tt  Heal  Sink» 

Tt>mnmn»f  Brand  S  lor  1 1  W 

TQ-77Xt  Nnt  Smfes  3  tor  i1  tt) 


Opto  Isoiatofs  -  4K2B  type 

Optq  Reflectors  *  Ptiolo  diode  *  LEO 


lif\ 


$.50  ea. 

Sl.oe  ea. 


Molt^  PIni 
fof  14  pm  sQcfceta    JO  atrlpa  fw  fl^.QO 


cm  Ph0lo^*lf< 

Rfriii&UMe^  itMf^ti  wiih  iifjni   ?SjO  uhms  io 
Qvet  3  mfQ  3  rof  II.OO 


144     73Magazine  •  JyneJ982 


OlAl 


YOUP 


TRADE  IN 

TRADE  YOUR  EQUIPMENT  ON 

NEW  or  USED 


CALL  TOLL 
-800- 

FOR  THE  BEST  DEAL  ON: 


3636 


YAESU 


ICOM 


KENWOOD 


TEtt-TEC 


INF&TECH 


COLUNS 


^>HA/VlRAQia££NL 

8340^3  Olive  BJvd.»    P  O.  Box  28271  •  St.  Louis.  MO  63132 


MastefCard 


TSMagazine  •  June,  1982     145 


4 


V-^  elect roqic^ 


Introducing 


<602)  242-3037 
(602)242-8916 

2111  W.  CAMELBACK  ROAD 
PHOENIX,  ARIZONA  85015 


TVRO  CIRCUIT  BOARDS 

Satellite  Receiver  Boards — Now  in  Stocic 


DUAL  CONVERSION  BOARD $25.00 

This  board  provides  conversion  from  the  3.7-4.2  band  first  to 
900  MHz  where  gain  and  bandpass  fiHering  are  provided  and, 
second,  to  70  MHz,  The  board  contains  both  local  oscillators, 
one  fixed  and  the  other  variable,  and  the  second  mixer.  Con- 
struction is  greatly  simplified  by  the  use  of  Hybrid  IC  amplifiers 
for  the  gain  stages. 


SIX  47pF  CHIP  CAPACITORS 
For  use  with  dual  conversion  board 


$aoo 


70  MHz  IF  BOARD .  $25.00 

This  crrcuit  provides  about  43dB  gain  with  30  ohm  Input  and 
output  impedance,  U  is  designed  to  drive  the  HOWARD/ 
COLEMAN  TVRO  Demodulator.  The  on-board  bandpass  filter 
can  be  tuned  for  bandwidths  between  20  and  36  MHz  with  a 
passband  ripple  of  less  than  V^  dB.  Hybrid  IC's  are  used  for 
the  gam  stages. 


SEVEN  .01  pF  CHIP  CAPACITORS 
For  use  with  the  70  MHz  tF  board  .  . 


.......  %f  *uy 


DEMODULATOR  BOARD. . . $40.00 

This  circuit  takes  the  70  MHz  center  frequency  satellite  TV  sig- 
nals in  the  10  to  200  millivolt  rar^ge,  detects  them  using  a  phase 
locked  loop,  de-emphasizes  and  filters  the  resutl  and  ampli- 
fies the  result  to  produce  standard  NTSC  video.  Other  outputs 
Include  the  audio  subcarrier,  a  DC  voltage  proportional  to  the 
strength  of  the  70  MHz  signal,  and  AFC  voltage  centered  at 
about  2  volts  DC, 

SINGLE  AUDIO $15,00 

This  circuit  recovers  the  audio  signals  from  the  6.S  MHz  fre- 
quency. The  Miller  9051  coils  are  tuned  to  pass  the  6.8  MHz 
subcarrier  and  the  Miller  9052  coil  tunes  for  recovery  of 
the  audio. 

DUAL  AUDIO $25.00 

Duplicate  of  the  single  audio  but  also  covers  the  6.2  range. 

DC  CONTROL ,•,..., $15.00 

SPECIAL  SET  OF  FIVE  BOARDS $100.00 

INCLUDING  DUAL  AUDIO  (2  single  audio  boards) 


1900  to  2500  MHz  MICROWAVE  DOWNCONVERTER 

MICROWAVE  RECEIVER  This  receiver  is  tunable  over  a  range  of  1900  to  2500  MHz  approximately,  and 
is  intended  for  amateur  use.  The  local  oscillator  is  voltage  controlled,  malting  the  I.F.  range  approximate- 
ly 54  to  88  MHz  for  standard  TV  set  channels  2  thru  7. 

P.O.  BOARD  with  DATA         1to5     $15.00         6to11     $13.00         12to26         $11.00         27-up     $9.00 

P.O.  Board  with  all  parts  for  assembly $49.99     P.O.  Board  with  all  chip  caps  soldered  on . . .  $30.00 

P.C.  Board  with  all  parts  for  assembly  P.O.  Board  assembled  &  tested $69.99 

plus  2N6603 $69.99     P.C.  Board  assembled  &  tested  with  2N6603S79.99 

HMR  11  DOWNCONVERTER  with  Power  Supply,  Antenna  (Dish)  &  all  Cables  for  installation.  180  Day  Warranty, 

1to5         $160.00  6  to  11         $140.00  12- up         $125.00 

YAGI  DOWNCONVERTER  with  Power  Supply,  Antenna  (Yagi)  &  all  Cables  for  installation.  90  Day  Wan-anty. 

1to5         $150.00  6to11         $140.00  12-up         $125.00 

YAGI  DOWNCONVERTER  as  above  but  Kit.  (NO  CABLES)  With  Box. 

1to5        $125.00  6to11         $115.00  12-up         $100.00 

HMR  II  DOWNCONVERTER  as  above  but  Kit.  (NO  CABLES)  With  PVC. 

1to5         $125.00  6to11         $115.00  12-up         $100.00 


p*««< 


SPECIAL  NEW  STOCK  OF  CARBIDE  DRILL  BITS— YOUR  CHOICE  $1.99 


1.25mm 

1.45mm 

3.2mm 

3.3mm 

1/8 
3/16 
5/32 
7/32 


13/64 

19 

20 

24 

26 

29 

30 

31 


36 
37 

38 
39 
40 
44 
45 
46 


47 

48 
49 
50 
51 
52 
53 
54 


55 
56 
57 
58 
59 
60 
61 
62 


63 
64 

65 

67 
68 
69 


146     73  Magazine  •  June,  1962 


Start  taking  calls  in  curious  places  with  tiie 
revolutionary,  new  Cordless  G>ik){H/ ^  Phone 


Special  Purchase — The 


® 


-h/ 


Cordless  Telephone! 


We  are  pleased  to  announce  the  Escort  Mark  III  is  now  avaOable 
at  special  pricing*  We  bought  the  manufacturer's  entire  Inventory*- 

and  we  are  passing  the  savings  on  to  you! 

The  Escort  Mark  III  was  originally  designed  to  retail  for  $199.95*  Now,  we 

suggest  a  retail  price  of  $169.95  to  $189.95.  Or,  you  can  move  them 

out  at  $149.95,  In  any  event,  you  HI  like  the  profit  margins. 


QUANTITY 

1 — 2  units 

3 — 5  units 

6 — 11  units 

12 — ^23  units 


DEALER  PRICE 

69.75  each 
64.50  each 
62.50  each 
60.75  each 


GROSS  PROFIT  A  T  $149. 95 

53% 
57% 
58% 
59% 


On  all  orders  of  12  or  more,  we  pay  the  freight!  This  Is  your  opportunity 
to  stock  up  for  the  Christmas  buying  season.  These  are  ideal  gift 

items ^  that  will  really  move  out! 


ESCORT  MARK  III  SPEC  I  PICA  TIONS 


VHF  DUPLEXERS 

This  duplexef  was  made  for  RF  Harris  Mobile 
Phones  and  Two  Way  Radios.  These  duplex- 
©rs  can  be  used  m  any  mobile  phone  or  two 
way  radio  systenn,  along  with  having  the  ca- 
pabiHtles  to  be  modified  for  UHF  use  The 
physical  dimensions  are  3  3/5"  Long,  4  2/5" 
Wide,  and  1  1/lC  Deep.  The  approximate 
weightis18o2./1  lb.2oz..  PRICE  $74.99 


0 


/-^* 


# 


*0 


•  Operates  as  a  regular  telephone  on  touch-tone  or 
rotary  dial  sy stems 

•  Flange  up  to  300  feet 

•  Ni-Cad  rechargeable  batteries  Included 
in  telephone 

•  Charger  built  into  base  transmftier 

•  Simple  plug-in  installation! 

•  High-performance  antenna 

•  Full  duplex,  answer  and  dial  out 

•  Full  FCC  approval 

Exactly  As  Shown 


HOW  WE  CUT  THE  CORD. 

The  new  Cordless  Phone 
works  on  a  simple, 
highly  sophisticated  principle. 
A  small  base  station  plugs  into 
your  regular  phone  jack,  and 
an  electrical  wall  outlet.  The 
base  station  then  transmits 
any  in*  or  out-going  call  to  the 
handheld  receiver,  anywhere 
up  to  300  feet. 


Toll  Fra«  Number 
800-528^)180 
(For  orders  only) 


JM^lIz  electroqics 


73  Magazine  •  June.  1982    147 


^'FILTERS' 


Collins  Mechanical  Filter  #526-9724-010  Model  F455Z32F 

455KHZ  at  3.2KHZ  Wide. 


$15.00 


Atlas  Crystal  Filters 

5.52-2.7/8        5.52MH2/2.7KH2  wide  8  pole 

5.595MHz/2.7KHz  wide  8  pole  upper  sideband 
5. 595MHz/. BOOKHz  wide  4  pole  CW 
5.595I'1Hz/2.7KHz  wide  8  pole  lower  sideband 
5.595MHz/2.7KHz  wide  8  pole  upper  sideband 
5. 645MHz/ 2. 7 KHz  wide  8  pole 
9.0MH2/  8  pole  sideband  and  CW 


5.595-2.7/8/U 

5.595-.500/4/CW 

5.595-2.7/LSB 

5.595-2.7/USB 

5.645-2.7/8 

9.0SB/CW 


Your  Choice 

S12.99 


Kokusai  Electric  Co.  Mechanical  Filter  #MF-455-ZL-21H 

455KHZ  at  Center  Frequency  of  453. 5Kc  Carrier  Frequency  of  455Kc  2.36Kc  Bandwidth 


$15.00 


Crystal  F- 

i 1 ters 

Nikko 

FX-07800C 

TEW 

FEC- 103-2 

Tyco/CD 

001019880 

Motorola 

4884863B01 

PTI 

5350C 

PTI 

5426C 

CD 

A10300 

7 . 8MH2 
10.6935 

10.7MHz  2  pole  15KH2  Bw.  Motorola  #48D84396K01 

Thru  #48D84396K05 

11.7MH2  2  pole  IBKHz  Bandwidth 

12MHz  2  pole  15KHz  Bandwidth 

21.4MHz  2  pole  15KHz  Bandwidth 

45MHz  2  pole  15KHz  Bandwidth  {For  Motorola 

Communications  equipment) 


10.00 

10.00 

4.00 
5.00 
5.00 
5.00 

5.00 


Ceramic  Filters 


Muratd 

BFB455B 

455KHZ 

CFM455E 

455KHZ  +- 

5.5KHZ 

CFM455D 

455KHZ  +- 

7  KHz 

. 

CFR455E 

455KHZ  +- 

5.5KHZ 

CFU455E 

455KHZ  +- 

1.5KHZ 

CFU455G 

455KHZ  +- 

IKHz 

CFW455D 

455KHZ  +- 

IKHZ 

CFW455H 

455KHZ  +- 

3KHz 

SFB455D 

455KHZ 

SFE10.7 

10.7MHz 

SF610.7MA 

10.7MHz 

Clevite 

TO-OIA 

455KHZ 

T0-02A 

455KH2 

Nippon 

LF-B4/CFU455I 

455KHZ  +- 

IKHz 

LF-B6/CFU455H 

455KH2  +- 

1KH2 

LF-C18 

455KHZ 

Tokin 

CF455A/BFU455K 

455KHZ  +- 

2KHz 

Matsushira 

EFC-L455K 

455KHZ 

ROTRON  MUFFIN  FANS  Model  Mark  4/MU2A1 

$  2.40 
6.65 
6. 65 
8.00 
2.90 
2.90 
2.90 
4.35 
2.40 
2.67 

10.00 
5.00 
5.00 
5.80 
5.80 

10.00 
4.80 
7.00 


These  fans  are  new  factory  boxed  llSvac  at  i4watts  50/60cps 
CFM  is  88  at  50cps  and  105  at  60cps. 


Impedance  Protected-F 


$7.99 


SPECTRA  PHYSICS  INC.  Model  088  HeNe  Laser  Tubes. 

Beam  Dia.  .75nifn.    Beam  Dir 
lOOOvdc  +-10Qvdc     3.7iiia. 


Power  output  1.6inw. 
68K  ohm  Iwatt  ballast 


2.7mr.     8Kv  starting  voltage 
TUBES  ARE  NEW  $59.99 


i 


148     73  Magazine  •  June,  1962 


ii 


AMPLIFIERS" 


AVANTEK  LOW  NOISE  AMPLIFIERS 


Models 

UTC2-102M 

AP-2Q-T 

AL-45-0-1 

AK-IOOOM 

Frequency  Range 

30  to  200MC 

200  to  400MC 

450  to  800MC 

500  to  lOOOMC 

Noise  Figure 

l,5dB 

6.5dB 

7dB 

2.5dB 

Voltage 

+15vdc 

+24vdc 

-6vdc  @  +:2vdc 

+I2vdc  9   -12vdc 

Gain 

29dB 

30dB 

30dB 

25dB 

Power  Output 

IdB  Gain  +7dBm 

IdB  Gain  +20dBm 

IdB  Gain  -5dBm 

IdB  Gain  +8dBm 

Price 

$49.99 

$49.99 

$49.99 

$69.99 

I 


Mini  Circuits  Double  Balanced  Mixers 


Model  RAY- 3 

Very  High  Level  (+23dBm  LO)  70KHz  to  200MHz  L0,RF,DC  to  200MHz  IF 

Conversion  Loss,dB  One  Octave  From  Band  Edge  6Typ./7.5Max.  Total  Range  6. 5Typ./8Max. 

Isolation ,dB  Lower  Band  Edge  To  One  Decade  Higher  (LO-RF/LO-IF)   55Typ./45Min,  M1d,  Range 

(LO-RF/LO-IF)   40Typ./30Min.   Upper  Band  Edge  To  One  Octave  Lower  (LO-RF/LO-IF)   30Typ./ 

25Min. 

Price  $24.99 

Model  TSM-3 

Standard  Level  (+7dBm  LO)  .IMHz  to  400MHz  LO,RF,DC  to  400MHz  IF 

Conversion  Loss.dB  One  Octave  From  Band  Edge  5.3Typ./7.5Hax.  Total  Range  6.5Typ./8.5Max. 

Isolation.dB  Lower  Band  Edge  To  One  Decade  Higher  (LO-RF/LO-IF)   60Typ./50Min.  Mid.  Range 

(LO-RF/LO-IF)   50Typ./35Min.   Upper  Band  Edge  To  One  Octave  Lower  (LO-RF/LO-IF)   35TYP./ 

25Min. 

Price  $11.99 


Hewlett  Packard  L 

inear  Power  Microwave  RF  Transistor  HXTR5401/35831E 

Collector  Base  Brakedown  Voltage  at 

Ic=100ua 

35volts  min. 

Collector  Emitter 

Brakedown  Voltage 

at  Ic=500ua 

30volts  min. 

Collector  Cutoff 

Current  at  Vcb=15v 

lOOua  max. 

Forward  Current  Transfer  Ratio  at  Vce=15v»Ic=15ma 

15min,40typ,125max 

Transducer  Power 

Gain  at  Vce=18v,Ice 

=50ma,F=2GHz. 

3dBmin,4dBtyp 

Maximum  Available 

Gain  at  Vce=18v,Ic 

=60ma,F=lGHz/F=2GHz 

14dB  typ,8dB  typ 

Price 

$29.99 

Motorola  RF  Power 

Ampl ifier  Modules 

Model 

MHW612A 

MHW613A 

MHW710 

MHW720 

Frequency  Range 

146  to  147MHz 

150  to  174MHz 

400  to  512MHz 

400  to  470MHz 

Voltage 

12.5vdc 

12.5vdc 

12.5vdc 

12.5vdc 

Output  Power 

ZOwatts 

30watts 

13watts 

20watts 

Minimum  Gain 

20dB 

20dB 

19.4dB 

21dB 

Harmonics 

-30dB 

-30dB 

40dB 

40dB 

RF  Input  Power 

400mw 

SOOmw 

250mw 

250niw 

Price 

$57 . 50 

$59.80 

$57 . 50 

$69.00 

Toll  Free  Number 

800-528-0180 
(For  orders  only) 


(f\f  ^i^  elect roi|ics 


73 Magazine  *  June,  1962     149 


"TRANSISTORS" 


WATKINS  JOHNSON  WJ-M62  3.7  to  4.2GHz  Comniunication  Band  Double  Balanced  Mixer 


$100.00 


SSB  Conversion  Loss  4.9dB  Typ.  6dB  Max.  fR  3.7  to  4.2GHz 

5,5dB  Typ.  6.5dB  Max.  fl  DC  to  1125MHz  fL  fR 

fl  SSOMHz  fL  fR 
fR  3.7  to  4.2GH2 
4.9dB  Typ.  6dB  Max.   fl  30  to  1125MHz  fL  fR 
5.5dB  Typ.  6.5dB  Max.  fl  880MHz  fL  fR 


SSB  Noise  Fiqure 


Isolation 

fL  at  R 
fL  at  I 


30dB  Min.  40dB  Typ. 
25dB  Min.  30dB  Typ. 
20dB  Min.  30dB  Typ. 
15dB  Min.  25dB  Typ. 
IdB  Max. 


fL  2.8  to  5.35GH2 
fL  4.5  to  5.35GHz 
fL  3.6  to  4.5GHz 
fL  2.8  to  3.6GH2 
fR  Level  +2dBm 


Conversion  Compression 

Flatness  .2dB  Peak  to  Peak  Over  any  40MHz  Segment  of  fR=3.7  to  4.2GH2 

Third  Order  Input  Intercept  +lldBm       fRl=4GHz  fR2=4.01GHz  Both  at  -5d8m  fL=4.5GHz 


Group  Time  Delay 

VSSJR 


.5ns  Typ 

L-Port 

R-Port 

I -Port 


75ns  Max.   fR3.7  to  4.2GHz  fL  3480MH2 


@  +13dBm 


.25:1  Typ.  2.0: 

.25:1  Typ.  2.0: 

.4   :1  Typ.  2.0: 

.5   :1  Typ.  2.0: 

.3    :1  Typ.  2.0: 

.8   :1  Typ.  2.5: 


fL  2.8  to  5.35GHz 

fR  3.7  to  4.2GH2  fL  fR 

fR  3.7  to  4.2GHz  fL  fR 

fI=100MHz 

fl=500MHz 

fI=1125MHz 


SGS/ATES  RF  Transis 

tors 

Motorola  RF  Trans 

is  tor 

Type. 

BFQ85 

BFW92 

MRF901 

2N6603 

Collector  Base  V 

20v 

25v 

26v 

25v 

Collector  Emitter  V 

15v 

15v 

15v 

15v 

Emitter  Base  V 

3v 

2.5v 

3v 

3v 

Collector  Current 

40nia 

25ma 

30ma 

30ma 

Power  Dissipation 

200mw 

190IT1W 

375niw 

400mw 

HFE 

40min. 

200max. 

20mi  n . 

ISOmax. 

30inin.  200max, 

30min.  200max. 

FT 

4GHZ  min. 

.  5GHz 

max.l.6GHz 

Typ. 

4.5GHz  typ. 

2GHz  min. 

Noise  Fiqure 

IGHz  3dB 

Max. 

500MHz 

4dB 

Typ. 

IGHz  2dB  Typ. 

2GHz  2.9dB  Typ 

Price 

SI. 50 

$1.50 

$2.00 

$10,00 

.'National  Semiconductor  Var 

iable  Vo' 

Itage  Regulator 

Sale 

1  1  1  1  j  1  j  M 

LM317K 

1.2  to  37vdc 

l.SAtnps 

TO- 3 

$4.50 


LM350K 

1.2  to  33vdc 

3Anips 

TO- 3 

$5.75 


LM723G/L 
2  to  37vdc 
150ma. 

TO-lOO/TO-116 
$1.00  $1.25 


LM7 805/06/08/ 12/15/18/24 

5,  6,  8,12,15,18,24vdc 
lAmp 

T0-220/T0-3 
$1.17  $2.00 


P  &  B  Solid  State  Relays  Type  ECT1DB72 


May  Be  Other  Brand  Equivalent 

Toll  Free  Number 
800-528-01 80 
(For  orders  only) 


5VDC  Turn  On  120VAC  Contact  7Aiiips 

ZOAmps  on  10"xl0"x.062"  Alum.Heatsink  with 
Silicon  Grease  $5.00 


(f|\I*^l|z  elect roi|ieg 


150     73  Magazine  •  June,  1962 


ti 


MIXERS" 


WATKINS  JOHNSON  WJ-M6  Double  Balanced  Mixer 


LO  and  RF  0.2  to  300MH2 

Conversion  Loss  (S5B) 

Noise  Figure  (SSB) 
Conversion  Compression 


IF  DC  to  300MHz 
6.5dB  Max,  1  to  50MHz 
8.5dB  Max.  .2  to  300MHz 
same  as  above 

S.5dB  Max.  50  to  300MHz 
.3dB  Typ. 


$21.00 

WITH  DATA  SHEET 


NEC  (NIPPON  ELECTRIC  CO.  LTD.  NE57835/2$C2150  Microwave  Transistor 


NF  Min  F=2GHz 
F=3GHz 
F=4GHz 


dB  2.4  Typ. 
dB  3.4  Typ. 
dB  4.3  Typ. 


MAG  F=2GHz 
F=3GHz 
F=4GHz 


dB  12  Typ. 
dB  9  Typ. 
dB  6.5  Typ 


$5.30 


Ft  Gain  Bandwidth  Product  at  Vce=8v,  Ic=10ma.   GHz  4  Min.  5  Typ. 
Vcbo    25v    Vceo    Uv    Vebo    3v    Ic   50ma.  Pt.     250mw 


UNELCO  RF  Power  and  Linear  Amplifier  Capacitors 


These  are   the  famous  capacitors  used  by  all  the  RF  Power  and  Linear  Amplifier  manufacutures 
and  described  in  the  Motorola  RF  Data  Book. 


lOpf 
13pf 
I4pf 
20pf 


22pf 

25pf 
27pf 
27.5pf 


30pf 
32pf 
33pf 
34pf 


40pf 
43pf 
52pf 
SOpf 


lOOpf 
I20pf 
IBOpf 
200pf 


250pf   1  to  lOpcs.   .60i£  each 

820pf   11  to  50pcs.  .50^  each 

51  to  lODpcs.  AQi   each 


NIPPON  ELECTRIC  COMPANY  TUNNEL  DIODES 

Peak  Pt.  Current  ma,  Ip 

Valley  Pt.  Current  ma.  Iv 

Peak  Pt.  Voltage  mv.  Vp 

Projected  Peak  Pt.  Voltage  mv.  Vpp  Vf=Ip 

Series  Res.  Ohms  rS 

Terminal  Cap.  pf.  Ct 

Valley  Pt.  Voltage  mv.  VV 


MODEL  IS 21 99 

ftftin.   lOTyp,   Umax. 

1.2Typ.    l.Bmax. 

95Typ.  IZOmax. 

480min.  550Typ.  630max. 

2.5Typ.  4max, 

1.7Typ.  2max. 

370Typ. 


1S2200   ^^'^° 

9min.  lOTyp.  Umax, 

1.2Typ.  1.5max. 

75Typ.  90max. 

440min.  520Typ.  600max. 

2Typ.  3max. 

5Typ.  8max. 

350Typ. 


FAIRCHILD  /  DUMONT  Oscinpscope  Probes  Model  4290B 

Input  Impedance  10  meg..  Input  Capacity  6.5  to  12pf.,  Division  Ration  (Volts/Div  Factor) 

10:1,  Cable  Length  4Ft.  ,  Frequency  Range  Over  lOOMHz. 

These  Probes  will  work  on  all  Tektronix,  Hewlett  Packard,  and  other  Oscilloscopes. 

PRICE   $45.00 


MOTOROLA  RF  DATA  BOOK 


List  all  Motorola  RF  Transistors  /  RF  Power  Amplifiers,  Varactor  Diodes  and  much  much 
more. 


PRICE   $7.50 


Toll  Free  Number 
800-528-01 80 

(For  orders  only) 


Q^^t[x  electroi|ics 


73  Magazine  •  June,  1982     151 


4 


"SOCKETS  / 

EI MAC  TUBE  SOCKETS  AND  CHIMNEYS 

SKI 10     Socket 

$  POR 

SK4a5     Chimney 

35.00 

SK416     Chimney 

22.00 

SK500     Socket 

330.00 

SK506     Chimney 

47 .  00 

SK600     Socket 

39.50 

SK602     Socket 

56.00 

$K606     Chimney 

8.80 

SK607     Socket 

43.00 

SK610     Socket 

44.00 

SK620     Socket 

45.00 

SK620A    Socket 

50.50 

JOHNSON  TUBE  SOCKETS 

124-115-2/SK620A  Socl 

tet 

$  30.00 

124-115/SK630A   Socket 

40.00 

CHIP  CAPACITORS 

.8pf 

lOpf 

^ 

Ipf 

12pf 

l.Ipf 

15pf 

1.4pf 

18pf 

l.Spf 

20pf 

1.8pf 

22pf 

2.2pf   • 

24pf 

2.7pf 

27pf 

3.3pf 

33pf 

3.6pf 

39pf 

3.9pf 

47pf 

SK626 

Chimney 

$  7.70 

SK630 

Socket 

45.00 

SK6366 

Chimney 

26.40 

SK640 

Socket 

27 .  50 

SK646 

Chimney 

55.00 

SK711A 

Socket 

192.50 

SK740 

Socket 

66.00 

SK770 

Socket 

66.00 

SK800A 

Socket 

150.00 

SK806 

Chimney 

30.80 

$K900 

Socket 

253.00 

SK906 

Chimney 

44.00 

124-113    Bypass  Cap. 
122-0275-001  Socket 


$  10.00 


4.7pf 
5.6pf 
6.8pf 
8.2pf 

PRICES: 


I  to  10  - 

II  to  50 
51  to  100 


{For  4-250A,4- 

400A,3-400Z, 

10.00 

3-500Z) 

2/S15.00 

pf 
pf 
pf 

pf 
pf 

pf 
pf 

lOOpf* 
UOpf 

120pf 
UOpf 
150pf 
ISOpf 
ISOpf 

430pf 
470pf 
510pf 
560pf 
620pf 
580pf 

a20pf 

pf 

200pf 

lOOOpf/.OOluf* 

pf 

220pf* 

ISOOpf/.OOlSuf 

pf 

240pf 

27O0pf/.0O27uf 

pf 

270pf 

lO.OOOpf/. 

Oluf 

pf 

300pf 

I2,000pf/. 

.0l2ijf 

pf 

330pf 

15,000pf/. 

.015uf 

pf 

360pf 

18,000pf/, 

.018uf 

pf 

390pf 

t       101  to  1000 

.60C   *  IS  A  SPECIAL 

PRICE:  10  for  $7.! 

50 

t       1001  &  UP 

.354 

100  ■ 

For  S65.00 

t 

^  ^m     ^H-  ^m      ^m     ^m     ^m     -ri^  ^m     ^m     ^m     ^m     .^h  ^m      ^h  ^h-  ^h  ^h  .^h  .-^^  ^h.  j^b  4 

1000 

for  $350.00 

WATKINS  JOHNSON  WJ-V907:  Voltage  Controlled  Microwave  Oscillator 


$110.00 


Frequency  range  3.6  to  4.2GHz,  Power  ouput,  Min.  lOdBm  typical,  8dBm  Guaranteed. 
Spurious  output  suppression  Harmonic  (nfo),  min.  20dB  typical,  In-Band  Non-Harmonic,  min. 
60dB  typical.  Residual  FM,  pk  to  pk.  Max.  5KHz*  pushing  factor.  Max.  8KHz/V,  Pulling  figure 
(1.5:1  VSWR),  Max.  60MHz,  Tuning  voltage  range  +1  to  +15volts.  Tuning  current.  Max.  -0.1mA, 
modulation  sensitivity  range.  Max.  120  to  30KHz/V,  Input  capacitance,  Max.  lOOpf,  Oscillator 
Bias  +15  +-0.05  volts  0  55mA,  Max. 


Toll  Free  Number 
600-528-0180 
(For  orders  only) 


J\f  ^^1^  electronics 


1S2     73 Magazine  *  June.  1982 


"TUBES" 


TUBES 

2E26 
2K28 
3B28 

3-500Z 

3-1000Z/8164 

3CX1000A/8283 

3X2 500 A3 

4-65A/8165 

4-125A/4D21 

4-250A/5D22 

4-400A/8438 

4-400C/6775 

4-1000A/8166 

4CS250R 

4X150A/7034 

4X1 500/ 7035 

4X1 50G 

4X250B 

4CX250B/7203 

4CX250F/7204 

4CX250FG/8621 

4CX250K/8245 

4CX250R/7580W 

4CX300A 

4CX350A/8321 

4CX350FJ/89a4 

4X500A 

4CX600J 

4CX1000A/8168 

4CX1500B/8660 

4CX3000A/8169 

4CX5000A/8170 

4CX10000D/8171 

4CX15000A/8281 

4E27/A/5-123A/B 

4PR60A 

4PR60B/8252 

KT88 

DX362 

DX415 

572B/T160L 

811 

SUA 

812A 

813 

4624 
4665 
555  lA 
5563A 

5675 


PRICE 

$  4,69 
100.00 

5.00 

102.00 

300.00 

200.00 

200.00 

45.00 

58.00 

68.00 

71.00 

80.00 

300.00 

69.00 

30.00 

40.00 

50.00 

30.00 

45.00 

45.00 

55.00 

100.00 

69.00 

99.00 

100.00 

100.00 

100.00 

300.00 

300.00 

300.00 

300.00 

400.00 

500.00 

700.00 

40.00 

100.00 

175.00 

15.00 

35.00 

35.00 

44.00 

10.00 

13.00 

15.00 

38.00 

100.00 

350.00 

100.00 

77.00 

15.00 


TUBES 

5721 

5768 

5836 

5837 

5861/EC55 

587  6  A 

5881/6L6 

5894/A 

5894B 

6080 

6083/AX9909 

6098/ 6A  KB 

6115/A 

6146 

6146A 

6146B/8298A 

6146W 

6159 

6161 

6291 

6293 

6360 

6524 

6550 

6562/6794A 

6693 

6816 

6832 

6883/8032A/8552 

6884 

6897 

6900 

6907 

6939 

7094 

7117 

7211 

7289/3CX100A5 

7360 

7377 

7486 

7650 

7843 

7868 

7984 

8072 

8121 

8122 

8236 

8295/PL172 


PRICE 

$200.00 

85,00 

100.00 

100.00 

110.00 

15.00 

5.00 
45.00 
55.00 
10.00 
89.00 
14.00 
100.00 

6.00 

6.50 

7.50 
14.00 
11.00 
70.00 
125.00 
20.00 

4.00 
53.00 

7.00 

25.00 

110.00 

58.00 

22.00 

7.00 
46.00 
110.00 
35.00 
55.00 
15.00 
75.00 
17.00 
60.00 
34.00 
11.00 
67.00 
75.00 
250-00 
58.00 

4.00 
12.00 
55-00 
50.00 
85.00 
30.00 
300.00 


TUBES 

8462 

8  50  5  A 

8533W 

8560A 

8560AS 

8608 

8624 

8637 

8647 

8737/5894B 

8807 


8874 

8875 

8877 

8908 

8916 

8930/X651Z 

8950 


6BK4C 

6DQ5 

6FW5 

6GE5 

6GJ5 

6HS5 

6JB5/6HE5 

6JB6A 

6JM6 

6JN6 

6JS6B 

6JT6A 

6KD6 

6K66/EL505 

6KM6 

6KN6 

6LF6 

6LQ6 

6LU8 

6LX6 

6ME6 

12JB6A 


PRICE 

Sioo.oo 

73.50 
92.00 
55.00 
57.00 
34.00 
67.20 
38.00 
00 
10 
00 
00 
00 
00 
00 
00 


123 

55 
1000 
260 
260 
260 
533 

12 


1500,00 
45.00 
10-00 

5.00 

4.00 
5.00 
5.00 
5.00 
5.00 
5.00 
5.00 
5.00 
5.00 
5.00 

5.00 
5.00 
5.50 
5.00 
5.00 
6,00 
6.00 
5.00 
5.00 
5.00 
6.00 


"WE  ARE  ALSO  LOOKING  FOR 
TUBES  NEW/USED  ECT." 

WE  BUY  SELL  OR  TRADE 


NOTICE  ALL  PRICES  ARE  SUBJECT  TO  CHANGE  WITHOUT  NOTICE  !  J !!!!!!!!!!!!  1 !!!!!  H  !!  H  I !!  M  i !  I ! ! 


Toll  Free  Number 
800-528^180 
(For  orders  only) 


i^^l\z  elect rof|ic$ 


73 Magazine  •  June,  1982     1S3 


TEKTRONIX  OSCILLOSCOPES 

MODEL  4&3  Poriibl*  50  MHi 

Dual  Trace, 

MODEL  4S3A  Portlblt  60  MHz 

Dual  Trace. 

MODEL  454  Portible  ISO  MHz 
Dual  Trace. 

MODEL  4&4A  Portftbit  1  SO  MHz 

Dual  Trace. 

MODEL  4S5  Portable  SO  MHz 

Dual  Trace, 

MODEL  475  Portable  200  MHz 
Dual  Trace. 

MODEL  475A  Portable  250  MHz 
Dual  Trace, 

MODEL  7514  Storage  OecUlQscope 
with  a  7A1SA  and  a  7A15AN-1 1  AmpUftm 
aniJ  a  7B50  Time  Base 

MODEL  577D1  Storage  Curve  Tracer 
With  a  177  adapter 

MODEL  57TD2  Curve  Tracer 
with  a  177adaptef. 
Teklronu  Lab  Cart  Model  3 


PAIGE 
S1200.00 

S1 400.00 

iiaoo.oo 

S2000.0Q 
$1800.00 
12640.00 
t2940.00 

S3500  0O 

S3233  00 

S2796  00 
%  3t6.00 


MODEL  547  50  MHi  iencti  Scope. 

Wdha  1A1  Dual  Trace. 

With  a  1A2  Dual  Trace, 

With  3  1A4  Quad  Trace. 

With  a  1A5  Differential 

Wilha1A6Qifferentiai 

or  with  1  of  each  above 

MODEL  545  10  MHz  Bench  Scope 
with  a  CA  Dual  Trace 

MODEL  545A  30  MHz  Bench  Scope 
with  a  CA  Dual  Trace 


S 

s 
s 
$ 
s 


722.50 
637.50 
a72.50 
722.50 
612.50 


S1667S0 


S  412  50 


£  437  50 


MODEL  544  50  MHz  Bench  Scope 
withaCA  Qua  (Trace 

MODEL  543A  33  MHz  Berich  Scope 

With  a  GA  Dual  Trace 

HEWLETT  PACKARD  OSCILLOSCOPES 

MODEL  1d0A  Main  Frente^ 

MODEL  laOE  Main  Frame. 

MODEL  1B1A  Mem  Frame. 

MODEL  ie2AMBin  Freme. 

MODEL  163A  Main  Frame. 

MODEL  iaO  SERIES  PLUG-INS 
l60lADualTrace50MHz. 

t803ADfffereniial, 

1B04A  Quad  Trace  50  MHz 

ie07A  Dual  Trace  50  MHz 

iai5A  TDR/Sampler  wrth  a  iei6A  DC  1o  4 
GHz 

1821 A  Time  ease  &  DeJay  Generator 

1622A  Time  Base  &  Deiay  Ge»^efator 

1831 A  Direct  Access  6O0  MHi. " 

1B40A  Time  Bases  Delay  Generator  ' 

iB4lATimeBase&DeiayGener3tOf  ' 
•For  183A  Only  'n'"»" 

TELEQUIPMENT  MODEL  0S3  Oscilloscope 

Dual  Trace  Portable 50  MHz  Wrtha  V4  and  S2APlug  In 

DUMONT  MODEL  1062  Oscilloscope 

Dual  Trace  65  fWlHz  portable. 

TEKTRONIX 

MODEL  RMS65  Dual  Beam  Oscilloscope 

!0  MHz  wUh  a  3A6  Dual  Trace  and  a  3A72  Dtiai  Trace  $1107.50 

MODEL  549  Storage  Oscilloscope 

Bench  50  MHz  wim  a  CA  Ouai  Trace  Si 000.00 

MODEL  &47A  Oscilloscope 

Bench  100  MHz  wtth  a  10A2  Duai  T'ace 

and  a  1 1 B2A  Time  Base  Si 200.00 


S  650.50 

%  475.50 
PRICE 
I  675.00 
I  7S0.00 

t1 000.00 
I  900.00 
11000.00 

5  495.00 
S  775.QO 
S  795.00 
S  375.00 

SI  500.00 
S  495.00 
S  525.00 
i  200.00 
S  450.00 
S  675.00 


S1 200,00 


S  750.00 


ORDERING  INSTRUCTIONS 
DEFECTIVE  MATERIAL:  All  claims  for  defective  material  must  be  made  within  sixty  (60)  days  after  recetpt  of 
parcel  All  claims  must  include  the  defective  material  (for  testing  purposes),  our  invoice  number,  and  the  dale 
of  purchase.  All  returns  must  be  packed  properly  or  it  will  void  all  warranties. 

DELIVERY;  Orders  are  normally  shipped  within  48  hours  after  receipt  of  customer's  order.  If  a  part  has  to  be 
backordered  the  customer  is  notified.  Our  normal  shipping  method  is  via  First  Class  Mail  or  UPS  depending  on 
size  and  weight  of  the  package.  On  test  equipment  it  is  by  Air  only,  FOB  shipping  point. 

FOREIGN  ORDERS:  All  foreign  orders  must  be  prepaid  with  cashier's  check  or  money  order  made  out  in  U.S. 
Funds,  We  are  sorry  but  C.O.D.  is  not  available  to  foreign  countries  and  Letters  of  Credit  are  not  an  acceptable 
form  of  payment  either.  Further  infoTmation  is  available  on  request. 

HOURS:  Monday  thru  Saturday:  8:30  a,m,  to  5:00  p>m. 

INSURANCE  Please  include  25e  for  each  additional  S1 00.00  over  $100.00,  United  Parcel  only. 

ORDER  FORMS:  New  order  forms  are  included  with  each  order  for  your  convenience.  Additional  forms  are 
available  on  request. 

POSTAGE:  Minimum  shipping  and  handling  in  the  US,  Canada,  and  Ivlexico  is  $2.50  all  other  countries  is  $5.00. 
On  foreign  orders  include  20%  shipping  and  handling, 

PREPAID  ORDERS:  Order  must  be  accompanied  by  a  check. 

PRICES:  Prices  are  subject  to  change  without  notice. 

RESTOCK  CHARGE;  If  parts  are  returned  to  MHZ  Electronics  due  to  customer  error,  customer  will  be  held 
responsible  for  all  extra  fees,  will  be  charged  a  15%  restocking  fee,  with  the  remainder  in  credit  only.  All  returns 
must  have  approval. 

SALES  TAX:  Arizona  must  add  5%  sales  tax.  unless  a  signed  Arizona  resale  tax  card  is  currently  on  file  with 
MHZ  Electronics.  All  orders  placed  by  persons  outside  of  Arizona,  but  delivered  to  persons  in  Arizona  are  sub- 
ject to  the  5%  sales  tax. 

SHORTAGE  OR  DAMAGE:  All  claims  for  shortages  or  damages  must  be  made  within  5  days  after  receipt  of 
parcel  Claims  must  include  our  invoice  number  and  the  date  of  purchase.  Customers  which  do  not  notify  us 
within  this  time  period  will  be  held  responsible  for  the  entire  order  as  we  will  consider  the  order  complete. 

OUR  800  NUMBER  IS  STRICTLY  FOR  ORDERS  ONLY 
NO  INFORMATION  WILL  BE  GIVEN.  1-800-5 28-0 180, 


154     73  Magazine  *  June,  1982 


FAJRCHILD 

95  H  90  DC 

95H91DC 

11C90DC 

11C91DC 

11C060C 

11C05DC 

11C01FC 
82S90 


11C24DC 


11C44DC 


VHFANDUHFpRESCALER  CHIPS 
350MC  Prescaler  divide  by  10/1 1 
350 MC  Prescaler  divide  by  &/6 
650MC  Prfiscaler  divide  by  TO/1  X 
650MC  Pf^scaler  drvide  by  5/6 
UHF  Prescalef  750MC  DType  Flip  Flop 
1GH2  Counter  Divide  by  4 
(Rei^ular  pnce $75.00) 
High  Speed  Dual  5/4  Jnpyl  MO/NOR  Gate 
Pre^ettable  High  Speed  Decade/Binary 
Counter  used  with  the  nC90/9l  or  the 
95H90/91  Prescater  can  divide  by  100. 
(Signeiics) 

This  chip  is  the  same  as  a  Motorola 
MC4024/4324  Dual  TTL  Voltage  Control 
Multivibrator. 

This  Chip  IS  the  same  as  a  Motorola 
MC4044/4344  Phast  Frequency  Detectof . 


PRICE 

S  9.50 

8.50 

15.50 
15.50 
12.30 

50.00 
15.40 


HEWLETT  PACKARD 
MIXERS  MODELS 

Frequency  Range 

Input/Output  FreQuency  L  &  R 


Mixer  Conversion  Loss  (A) 

(8) 

Noise  Perfurmance  (SSB}  (A} 

(B) 
PRICE 


10514A 

2MHz  lo  500MC 

200KHZ  to 

500MC 

DC  to  500MC 

?dB 

9dB 

7dB 

9dB 

$49.99       PRJCE 


10514B 

2MHzto 

500MC 

200KNZ  to 

500MC 

DCto&OOMC 

7dB 

ddB 

7dB 

9dB 

$39.99 


5.00 

3.37 
3.37 


GENERAL  ELECTRIC  CO.  GUNN  DIODE  MODEL  ¥-2167 
f  req.  Gap  (GHZ)  12  10  lB.  Output  (Minj  lOOmW,  Duty  (%| 
CW.  Typ.  Bias  (VdC)  6,0.  Type  Oper  (MAdc)  550.  Max  ThreS. 
(mAdc)  ItXlO.  Max-  8«as<Vdcj  lO.O  S39.99 

VARIAN  GALLIUM  ARSENIDE  GUNN  DIODES  MODEL  VSX  9201S5 

Freq  Coverage  6  to  12  4GH2,  Output  (Mm  j  lOOmW,  Bias 

Voltage  (Max.)  14vdc.  Bias  current  (mAdc)  Operatmg  550  Typ. 

750  Max  ,  Threshold 850 Tup  1000  Max.  S39.99 

VARI  L  Co.  Inc.  MODEL  SS-43  AM  MODULATOft 

Fre<|  Range  60  10  150MC.  Insertion  Loss  l3dB  NominaL 

Signaf  Porl  Imp  SOohms  Nominal.  Sigrfal  Port  RF  Power 

+  lOdSm  Max.,  Modulation  Port  8W  DC  to  1KH2,  Modulation 

Port  Bias  ima  Nominal.  $24,99 


AVANTEK  CASCADA6LE 

MODULAR  AMPLIFIERS 

Frequency  Range 

Gain 

Noise  Figure 

Power  Output 


Gain  Flatness 
Input  Power  Vdc 
mA 


PRICE 


Model  UTQ-504 

UTO'511 

5  10  600  MHz 

5  to  5D0  MHz 

6dB 

iSdS 

lldB 

2.3dB  to  3dB 

+  17dB 

-2dB  to 
-3da 

IdB 

1dB 

+  24 

+  15 

100 

10 

$70  00 

PRICE 

$75.00 

FREQUENCY  SOURCES.  tNC  MODEL  MS-74X 

MICROWAVE  SIGNAL  SOURCE 

MS-74X:  Mechanically  Tunable  Frequency  Range  (MHz)  10630  to 

11230  (10,63  to  11  23GHZJ  Minimurn  Output  Power  (mW)  10.  Overall 

MuUipiier  Ratio  100,  Internal  Crystal  Osctliator  Frequency  Range 

(MHz)  08.4  to  104,0.  Maximum  Input  Current  (mA)  400. 

The  Signal  source  are  designed  for  applications  where  high  stability 
and  low  noise  are  of  prime  concern  these  sources  utilize  fundamen- 
tal transistor  oscillators  with  high  Q  coaxial  cavities,  followed  by 
broadbancJ  stable  step  recovery  diode  multiptiers.  This  design 
allows  Single  screw  mechanical  adjustment  of  frequency  over  stan- 
dard communications  bands.  Broadband  sampling  circuits  are  used 
to  phase  lock  the  oscillalOf'  to  a  htgh  stability  reference  which  may 
be  either  an  internal  self  contained  crystal  oscillator,  external 
primary  standard  or  yHf  synthesizer.  This  untque  technique  aJiows 
tor  opttmtzation  o'  DOIh  FM  noise  and  long  term  stabflity  List  Price 
IS  $1 158-00  (THESE  ARE  NEW>  Our  Price— $289. 


HEWLETT  PACKARD  1NS712  MICROWAVE  DIODE 
This  diode  wpII  replace  the  MBOiOT,  1N5711,  5082-2300. 
5082*2835  ecL  This  will  work  like  a  champ  in  all  those 
Down  Con  verier  projects.  $1.50  or  10/$  10,00 

MOTOROLA  MHW1172R  LOW  DISTORTION 
WIDEBAND  AMPLIFIER  MODULE 

Frequency  Range:  40  to  300  MHz..  Power  G3^^  at  50MHz 
I6.6min  to  I7  4max.,  Gain  Flatness  ±0,1  Typ.  ±0.2 
Max,  dB,,  DC  Supply  Voltage  -  28vdc,  RF  Voltage  Input 
+  70dBmV  PRICE  $29.99 

GENERAL  ELECTRIC  AA  NICADS 
Model  #41B905H011G1 

Pack  of  6  for  $5,00  or  60  Cells.  tO  Packs  for  $45.00 
These  may  be  broken  down  to  individual  ceJIs. 


ORDERING  INSTRUCTIONS 

TERMS:  DOMESTIC:  Prepaid,  C.O.D.  or  Credit  Card 

FOREIGN:  Prepaid  only,  U,S.  Funds— money  order  or  cashier's  check  only. 

C,0,D*;  Acceptable  by  telephone  or  mail.  Payment  from  customer  will  be  by  cash,  money  order  or  cashier's 
check.  We  are  sorry  but  we  cannot  accept  personal  checks  for  C.O.D.'s, 

CONFIRMING  ORDERS:  We  would  prefer  that  confirming  orders  not  be  sent  after  a  telephone  order  has  been 
placed.  If  company  policy  necessitates  a  confirming  order,  please  mark  ''CONFIRMING"  bofdly  on  the  order. 
If  problems  or  duplicate  shipments  occur  due  to  an  order  which  is  not  properly  marked,  customers  will  be 
held  responsible  for  any  charges  incurred,  plus  a  15%  restock  charge  on  returned  parts, 

CREDIT  CARDS:    WE  ACCEPT  MASTERCARD  VISA  AND  AMERICAN  EXPRESS. 

DATA  SHEETS:  When  we  have  data  sheets  in  stock  on  devices  we  do  supply  them  with  the  order. 


gM^ 


mister  ctiarge 


ViSA 


elect  roqicjii 


w*a 


(602)  242-3037 
(602)  242691 6 

2111  W.  CAMELBACK  ROAD 
PHOENIX,  ARIZONA  85015 

Toll  Free  Number 

800-528-0160 
(For  orders  only) 


I 

J 


*^Se#  U$t  ot  AifvefrrsefS  Ot^  ^9^  f  M 


73 Magazine  •  June,  1982     155 


ELECTRONICS 


FULL  LINE  ALL  PARTS  &  COMPUTER  PRODUCTS 


4^60 


P.O.  Box  443QM 
Santa  Clara.  CA  95054 

Will  calli;  2322  Walsh  Ave. 

(408)980-1640 

Sarw  day  shipment  Rrst  line  parts  only.  Factory  tested.  Guaranteed 
mmev  back,  Qual<ty  IC's  and  other  components  at  factory  prices. 

JNTIGRATED  CIRCUITS  P^^one  orders  only  (800)  538-8190 


74DDN  iy 

74D2N  I  ft 

74fld|(if  J? 

74ng«  1? 

741014;  1i 

7A2m  w 

7iim  IB 

7442K  ^^ 

7MES  .&9 

7*1  ?«  m 

J4r^N  3S 

J495N  as 

Tll^DN  1.011 

J4H-N  3?) 

7413^  SS 

7-t1-l5ff.  EP 

HMOU  1,21) 

?41HM  1.?5 

7J157H  -.M 

74igeH  :Tt] 

74tlSSII  K 

7ii?4Jt  .m 

?^17S«  la 

74tBa«  79 

r4^9Sh  rD 

7J1Z21W  125 

/4?%N  .69 

7i13&5fJ  .E5 

^'laEAN  .EJ 

Td|3S7ly  .ffi 

74LSMT1L 

?ilkM5*(  ..a 

74L£!33f  ■15 

74eJt4M  M 

rit.s2t»  .25. 

74LSMW  .S 

74LS3*N  .35 

74LSS5N  .S* 

■  ■i.iir.^hi  .sfl 

7i1L39SN  ,3a 

T^LSsQi'N  40 

7^L5MSN  45 

74Li)im  .4i 

74L5lS2hl  75 

?4L&]3flN  .-^ 

74L?ii1N  .7i 

74ilii55N  7* 

7J4S3.5TN  75 

7^LS162N  95 

3-44.5.163^  gs 

7^L&1MN  95 

74i.5i9aN  i.ag 

74iS-£?lH  11? 

LfiEAfI 

CJ^rig  l.lli 

bkmz  iM 

l'.t3fi^  3.4I> 

LM3KtH  .S7 

Lusnufv  .34 

LW3IJ8HI  .9?! 

lMJUK'N  .1)4 


i.Msm 

I.Sa 

CD4fl1T 

\M 

LH3E?^ 

3,75 

E;D4dlfl 

94 

IM3Se 

1.4.<J 

r41flD?9 

4S 

LM3Hl«r5 

1.3S 

CO4020 

gs 

LVI32CK-J? 

m 

:d4ki 

,Sft 

LH350)HS 

1.S5 

DD4dS2 

*10 

IJ*5^'& 

^ 

cP4iKa 

.s^ 

LM32DT'B 

,S5 

CD10E4 

73 

tMS^OT-tJ 

S5 

gD4K5 

23 

LMaaflT-f& 

,85 

CD4aa 

1.65 

I.WK3K'5 

*.fl5 

CD4ez7 

£5 

iMSJiN 

M 

CW02ft 

,90 

IM     '►, 

09 

Cd4Q2g 

a& 

LM.-:- 

1  a 

CD403(t 

.A% 

LWl'UDK-Ei 

r:i5 

CD«33% 

f& 

LM94D»t  1i 

i.as 

CD404P 

S5 

LW3fl(!»!-15 

1  » 

£ft«a4t 

,75 

LUMIIM^C 

1  3« 

aw43 

ss 

LW,mi5-5 

,?5 

CM)44 

m 

lU34CiT-fl 

.7S. 

ta>4d4E, 

w 

LM340T-1? 

.f5 

Cj^4Ci 

+s 

L»:]i  401-1:1 

Ti 

oivjugo 

55 

UMMOT-rS 

n 

c;P4a5i 

.•aa 

LU340T'34 

7f> 

C[j4|no 

1  42 

k«:JSi 

.!^:|W 

t.'a^^m 

;? 

LMirir 

f?9 

gD4i»fl 

35 

liflaSON 

1  00 

co^c^fl 

34 

1.M3S1 

1,60 

C[MD7n 

36 

LMSII^ 

1  60 

GD407I 

M 

IMFODH 

59 

Cp4i?.2 

ffl 

LMTSBH'N. 

4a- 

cu407a 

?j 

imy.in 

.86 

CI1407S 

3Q 

LMi'ilCH 

34 

,eD40j'? 

*5 

I.U,'4rN 

!]£ 

CD40T& 

3Q 

LW;ri)7H,-N 

n 

CCMOflE 

3;) 

LM74BK 

50 

ccwofl? 

^ 

LW1J03W 

i.ft 

CEH116 

,47 

LM13E4 

M(5 

C34430 

i.hi) 

I.Hi:iiVfj 

:  tt 

CD^SGiT 

gg 

LMIM/ 

I  so 

i-^iBDe 

Uh 

i.Minirj 

2  .■:. 

L^DflbiO 

35 

LMl43ti 

*.?■ 

CD4Sn 

54 

LMlfJ? 

&.?i 

I^P45i& 

Jjtt 

LHIKU 

J. 49 

CDdSIC 

no 

LM211I 

1  ?b 

CD4I18 

la 

LHHU:^ 

??j 

uunsai 

i.GiJ 

LHQSOilM 

.§g 

GD4£27 

1.S1 

i.w;j«i5 

i?fl 

tMiSA 

1.25 

LM;i^j^aN 

gs 

CD4553 

3.5fl 

^r,i4$av 

Ifl! 

CQJSfiB 

;.*b 

M^HAl 

1  30 

Cn45B3 

2.35 

«SS5V 

m 

i:u45a& 

Uh 

rt£![S&^ 

m 

CCM01S? 

3.1141 

»ei;S&$A 

1 11(1 

74O0[h 

34 

utitev 

1  at 

?4t!0i 

TUfSSTV 

HIFV 

74(;toi 

UF57nm 

4TS. 

net* 

.I'i 

;:Bij:ib 

BTj 

741:201 

.U 

TBLqg 

RO 

r4C3a 

Jib 

nfMi5 

Bfl 

r«43 

I.S5 

lilQB 

4  49 

7«;:.7* 

.!b 

T&*91CN 

iKi 

74C7Bi 

.SO 

TSigiCtJ 

7^ 

7+cai 

l.^i 

Ti*aapN 

ijfl 

r«:gtj 

1.2SI 

74,^354 

3.^5 

htaOCDHu^frtm^iCTfiJi 

lea 

^>33fm 

4. SO 

7*C175 

Lia 

8fm:i 

UK 

^*i;i^3 

1.6!i 

flllJlCN 

2M]0 

7*K21 

i.ai^ 

mmi 

lisi 

^J|C9l3!J 

fi.ao 

LDtafl 

6.M 

?4t9!]B 

.75- 

14G0WV.f 

7  40 

7,«K14 

i-a^ 

ICLJ3M 

Q.SD 

n^it 

5tia 

ICLJ!Q7 

14 .2S 

740933 

Siii 

^4Ca25 

fl.75 

EMD3 

74i3?a 

Gas 

CtJflCK) 

Ih 

^-iMrr 

«  OS 

i;d4D[m 

CDflDCT 
CD40M 

«t+3r 
ma  13 
CDJOia 

COJpid 

35 
3& 

45 
.35 

.;« 

4i 

.95 
.45 

INTEDFJlCE 

&0S5 

90% 

BB'J,' 

BD9S 

QTIM 

BT10 

AT  13 

BT2CI 

ATS 

BT34 

mm 

S5 

£5 

.65 

•Ht. 

1  St 

1  ?& 

1.4D 

4.93 

1,75 

1.75 

iT3S  I 

Sl^  1 

SFg; 
WK-HEHDRV  A«H 


2lti|-i 

1  '^5 

2102-1 

B^ 

210Z<\14 

I.Jlii 

?l(li!AN-2L 

1  66 

S"1il4JH 

4:96 

2m^4 

3.7b 

i^■\l-l 

7  m 

?1l^^ 

l.ss 

?1i4 

2.2\ 

2114LiOflns 

z.m 

J114£  tJOrw) 

■f:iT 

4110.?fflnE 

2:i& 

ilTTBStHlii 

1  t&.4Q 

Hu^nD 

3,LJJ 

MMHai 

g  95 

MW633D 

&.*; 

i>biClll 

BS^ 

42PUA 

11  iO 

m>^ 

,a-.so 

41013 

ID  1x1 

4lti 

?50 

TMW2U!f5 

ifl:fl5 

HMfirhS 

16  50 

CLnCHS, 

MM5311; 

4:9fl 

MMfSli 

3W 

M:M&314 

;1M 

MsMSSEh 

|-i}5 

hlM£S4l 

144& 

MMS^5 

7R6 

CTTDIH 

3.9^ 

crr7oi5 

B,95 

MMi375M,-1^  3.90 

Mhb3V:i^i'N  ii^B^ 

?2B!i 

1i>5II 

72^Vr 

r.il) 

m& 

15.96 

nm 

.i.gs 

mCRDPHKE^SDH 

6602 

6.*i 

VMh 

J.ea 

65^4 

e.55. 

652? 

3.7.5 

6LW 

S.&ft 

65-17 

14.95 

6S51 

'1!§ 

6SG0 

3.7* 

we? 

1195 

lilUlQ 

4.n 

BRSO 

3.5\) 

^miK 

^M 

BDS5A 

fl..5Ii 

7(W 

?110 

zetiB. 

18.K 

2B0  pro 

6.5D 

260AP1D. 

l.ftS 

1*0.  UC 

$.e 

fM^CTfi- 

166 

iGoDA^it 

iBf:& 

■im\  niFT 

IBTi 

ZSfi  uw^ 

IV.M 

jflOA  mti 

27.5a 

^fll}  t;TJ5(5 

2-J.95 

fiBDA  fsaii 

is.ga 

7*0  SI  (M 

n.m 

aoA  £.1d-r 

2ZM 

ZflOSIM 

?3,95 

ijiMi^m^ 

£&$5 

ZBDflCTC 

>7.gh 

iflDtiPiD 

MM 

B2i? 

1  as 

8?H 

3.7S 

821^ 

1  m 

B??i 

?  50 

a22U 

4  36 

8351 

4.75 

e-^53 

&,» 

M55 

4.-75 

es-s? 

APi 

!?E9 

1,90 

'8112CI:  pli-E 

1195 

^8DS!E  m^- 

l?K 

latif 

i^.SEi 

JIVS-IDS3  .ISIS 

AV5-l0^4  *.lli 

(■ElQM 

'7{i[:*  4.M 

.^532  ir:&o 

2rffii  i  is 

271  fi  5  Villi  5.3(1 

A-^7ifi  SWi  S^.Ofl 

?73!  i&5D 

?,J!iA  7  -i9 

B74EA  :^M 

H748  ■  33.«&- 

B74g-S  M.'SS 

B75*A,  4fi  ?5 

NB2S23  ^A^ 

NB?5E3J  J.D5. 

NB2S.^?g  4  75 

H©2513f  B  tif 

W?&1^7  &  li 

a??.3  3  sa 

CEMffCTORS 

3il  pin  i::l!li:  7M 

44  pill  ediitj  ?.7*i 

^!t  pill  ifflqd  4. DO 

1011  pill  fwtiijfl  J.» 
1 IH)  pn  ed^  wjw  4.95 

]C  SOCKETS 


seas  1:94 

OAiSI*  S:H1 

Dfttss  J.  in 

n^VTrteJ-rtie  ?ffii  ?.5I) 

SlapN^ltfi  ttn  S!i.-9ll 

AuEBClDCklCII  17.9«' 

Uipim  Clqsli  Mil  ^».?S 


lO  par  \')\x 

m  iKr  Iyee 

lOUD  par  tii« 

iflfllf  ^r  \ypi 

5  pw  rjiit 


.US! 

.an 
noas 

a.'gs 


1W 

■ULSTER 

CLUSEffUT 


i?4  SS 
B4.5{1 
IMS 
B9,95 


WlHEWMl'  LEVlldi 
I'M  PIK 

ViL        5a       J4  M 

Ifl     5?     2e  Its. 

n    «7    40  i^a 

'21a«l!3l«ri|B,>'*  m 

I  WHI  4|.Jtf 

4  VH:  3.95 

^Ullj  3.95 

lUMHi  3.I1B 

IB  j^H]  3  yd 

30  Mlh  3.50 

3i  MHi  3-.S0 

J27BBHJ  4  DO 

1  i«n  MHi  4.S0 
>.57g5  VHi  ■>  1^ 
?fl1KlMHj  1.95 
2-39?1i2H'.Hj  .1^5 

2  iS?6  MHJ  3  55 

3  1^  ?&S  MkT  3.95 
5. BEES  MK'  3.9a 
MBiMHj  3.9& 
5;.'^43  Mh-i  3  HS- 
5  5^JB  ma  3.B& 
►4  5m^*JMHr  3  9!J 
ES.432  Khr  3  ga 
25  1194  Mill  3  96 

KiEr^DKHD  ENCDDCRS. 

Avi  ?3^t  'igs 

Al^MlHU'Rrj  ■  ,\  ?5 

74tK2  5,  'ty 

ijC9«3  ^.5(1- 

HSIOI B5-5  7  fla 

DD25r  2.35 

Co^er  1  2i 


(MP  f  wirwij 

^-tHEiUaii  Bi 

ijigrifiinii  .90 

O'^Ki&dmii  M 

fi-{)Dsriian  ^1 

fi^$«y  fi^^irj'liliid 

HUM  Eiitloyir* 

kEIKS 

fediusa  15 

Gmr.  1h:ll?w  T0;«  30 

jiumbo  fel  55 

Lil^i',   Qr-Mi^f.,  Yf.Wv.v,  j,mt!ii  25 

Cliplllfl  LfiO  Mnnrllflo  ElUpa  4,  $3 

Hp4«   |*J,  ,)(inM=.  ui«tn.  ydlcw  GiepJ 

CWlTINQirAL  S.t>GClMI1Ei  in  tl»i* 
i:f:^ii[:ii!|i!  iiiiK  ijl  Jiiiiiitdiialasl  rquip 

OK  w/mE  wnAP  tdiH.4  i^  ada 

C3rr,p|p:E  lint  u'*-"  PffllJiiSJ  in  %faf)i 

SPECIAL  raODUCTS 

2.6  MHr  Fraq.  qliMnUr  M         37  60 


ACTRlUf51=DRMEHS 

fPlAMt 

l?dr  50]  ms      U 

6.1^  m  fiOO  ma   4 

tyv  330  iilfl  1 

«2.6VCTWCnnj    4 

IJ.eVCi  2Miba    S 

1J.6V  CT  4  htup     S 

12:&V  CI  B  amp    iQ 

?4VCT10Qimi    3 

24VCTe00jiia    <1 


WLL  PtUS 
DO  IGVS  aim     $7.65 

95  12MnT?50tllfl  3.75 
M  12V  500  ^n,i  4  so 
&a  i;ilf  I  Bin?      tiSi 

,50  IJV  f  nr^        ^  95 
atld,.  9   12-fDG 
95     500  ift,i        a.  95 
.as  ?  VtiC  503  ™  3.7i 


C6n5tiWHftiH3B»TrintB*niiflrt  12V  II  siiiu, 


Di^hAf  4.EDS 

WAM72  ■■!  CA-tft  .300'  75 

PL7CJ4                             CD  .300  1.25 

DL70-l3L7DTfl             Di  .300  1  OO 

UL727';?e  HA-Ci;  .50il  1  90 

DL747'?M  CA-CC   Effl  14f9 

FWD359                      CC  .^?  74 

HJD&Cnao?  C^CA  ,550  99 

FNPSOi-SHI  tX:tf,  .50fl  fl* 

FNOeoOSO?  Ct'CA   sot  3  2* 

1(1  .-itif!  ^Ji^ni^  1 .2^ 

?!j2(1  Oiu.Ei.  c*ialficEllE;  .^9 

ii'.3ii  HBi  a  M 

MA>J4l^:q                       OJIl -4(1  .9^ 

irtrtSyJMO                    eC  .41*  1.M 

HiW4710                        CA    411  .^j 

MAN474fl                    DC    4U  «.K1 

MANfiE4'J                        CC    ^  .9(1 

MAN&711]                    cyi  .60  :99 

MANG7i{l                    CC  v60  .» 

TB.EVIIlfl>TEFIMIillUL 

fteHf  86(1  JHBO.ai 


4n&  2C!Dn&  Oynamic  RAM      a>$15^4D 


ELECTROKIC  SYSTEMS  KITS 

Apple  Perlphflral  KIti 

SERIAL  i,''0  INTERFACE  Q  to  30.000  baud, 
D.T.R, .  Inpil  &  oiilpul  from  manitCfr  or  basse,  or 
vse Apple  as  intefHgent  terminal,  Bd  only  (P-"N  2) 
114.85.  Kit  {9iH  2k)  5&1.25,  Assembled  (R'N 
2C}  S62.95, 

PROTOTYPING  BOARD  (P.i-N  79Q7)  $21.95. 
PARALLEL  TRIAC  OUTPUT  BOARD  8  tfiacs. 
each  can  switch  110V  6A  loads.  Bd  only  (P/N 
210)  $19.20,  Kit  (P/N  210A)  1119.55, 
OPTO-ISOLATED  INPUT  BOARD  S  mputs,  can 
be  driven  Trom  TTL  Jogic,  Bd  only  ■(P.'N  120) 
S1S  J5.  Kit  (P/M  120A)  S69.95. 

Inlerlice  Kits 

SERtALPARALLEL  INTERFACE  Bidirectional, 
Baud  rates  from  110  to  13.aK,  sw  selectable 
polar ety  of  Input  and  output  strcb?,  5  to  S  data 
bits,  1  or  2  stop  tJtts,  parity  odd  orsVen  or  nori&, 
ail  characters  contaJo  a  start  bit,  i-5  4  -12V 
required  Btf  only  {9iH  101)  S11.95,  Kit  (P^N 
10m)S42.a9. 

RS^232/TTL  INTERFACE    Bldirectiorial.  re- 
quires x12V,  Kit  {P/N  232A)  |9J5. 
RS-232/20mA  INTERFACE    Bidirectional,   2 
passive  opt o- Isolated  circuits.  Kit  (P/N  7901  A) 
$14.9S. 

PROM  Eraser 

Win  erase  25  PfiO^s  in  IS  mi  notes,  Ultraviolet, 
assembi&d,  25  PROM  capacity  137.50  (wilti 
timer  169.50).  6  PROM  capacity  OSHA/UL  ver- 
sion STB. 50  (Willi  timer  (108.5{)) 

NiCad  Battery  Fixer/Charger  Kit 

Operts  shorted  cells  that  wgnT  tiald  a  charp  and 
then  charges  ttiem  up,  a]j  in  one  kit  w/full  parts 
and  irtstructicns.  No  PC  tfOard.  S8.95 


ZBO  Microcomputer 

16  bit  VO,  2  UWi  clock.  2K  RAM,  ROM  Breads 
hoard  space.  Escellnnt  fof  oontnol.  Bar&  Board 
S28.&a.  Full  Kit  S99.0Q.  Monitor $20. IKl.  Power 
Supply  Kit  $35.0Q.  Tiny  Basic  530,00. 

Modem  Kit  $60  JO 

State  ol  the  art,  orig.,  answer.  No  tuning  neces- 
sary. 103  compatible  300  baud,  inexpensive 
acoustic  coupler  pEans  included.  Bd.  only 
^17,00,  Articte  in  June  Ra^iiQ  Eiectrooics, 

60  Hz  Crystal  Time  Base  Kit  $4.40 

Converts  tiigftal  ciocks  from  AC  line  frequency  to 
crystal  lime  base.  Outslandins  accuracy. 

Video  Modulator  Kit  $9.95 

Convert  TV  set  into  a  high  quallly  moriEtor  w/o 
■  atfectmg  usage,  Com  p.  kit  w.-'ti>ll  instruc. 

Multf-voft  Computer  Power  Supply 

6v  5  amp,  ±lBv  .b  amp.  5v  I  5  arT>p,  -bv 
.5  amp,  12v  .5  amp,  -  12v  option  ±5v,  ±l2v 
ar«  regulated.  Basic  Kit  $35.96.  Kit  with  chassis 
and  all  hardware  $5195.  Add  $5.00  shipping.  Kit 
of  hand  ware  $IG.0D.  Woodgrain  case  SI  0^00. 
£T.50  shipping. 

Type-N-Talk  by  Vatrax 

Text  to  speech  syntiiesizerwith  unflmited  vocabu- 
lary, buift-in  text  ta  speech  aiganilim,  70  to  100 
bits  per  second  speech  syrtheslzer,  RS232C 
interface  $359  00,  Speectr  I C  $79.95. 

1002  iaK  Dytiamic  RAM  Kit  $149.00 

Ej<pandable  to  &4K„  Hidden  itfriisli  w/ciock?:.  irp  to 
4  MFte  w/no  wait  slates.  Addk  16K  RAM  $25. DO. 
S-tBP  4'Slal  expansion  S  9.95 

Super  Mon  itor  Vf .  I  Souice  l\^\m        $  1 5. 00 


."  ^^M' 


RCA  Cosmac1802 

Super  Elf  Computer  $106.95  ' 

The  Sup«i"  Eft  is  a  small  single  board  computer  that 
does  many  big  things.  It's  an  excellent  computer 
for  iraining  and  lor  learning  prooraniming  with  its 
machine  language  sf\6  yet  it V  easily  eipanded 
with  addltignal  memQry,  Full  Bask,  ASCII 
Keytwartt^,  video  character  generation,  etc, 

ROM  monitor;  State  and  Mode  displays;  Single 
step;  OptionaJ  address  displays;  Power  Supply; 
Audio  Amplifier  and  Speaker;  Rjlly  socketed  for  all 
tC'a;  Full  documentation. 

The  Super  Elt  ificiodes  a  ROM  monitor  for  pro- 
gram ioading  editing  and  execuhon  with  SiNGLi 
STEP  kr  proyram  debugging  which  is  not  in- 
cluded in  others  at  the  same  price.  With  SINGLE 
STEP  you  can  see  ttie  microprocessor  dhip  opei- 
ating  w^Eh  Ehe  unique  Quest  address  and  data  bus 
disp-lays  before,  during  and  after  executing  in- 
structions Atso,  CPU  mode  and  instructaon  cycle 
ari^  decoded  and  displayed  on  6  LED  indicators. 

An  RCA  1B61  vid-eoi  graphics  chip  allows  you  to 
connect  to  your  own  TV  with  an  inexpensive  vtieo 
modulator  to  do  grdpiii£5  and  gairi«s.  Ttiere  is  a 
speaker  system  included  for  writing  your  own 
music  or  uatng  many  music  programs  already 
written.  Ttie  speaker  amplifier  may  also  be  used  to 
drtve  relays  for  corrtnoi  purposes, 

A  24  key  HEX  keyboard  in{]ludfi5 1  &  HEX  keys  plus 
load,  resat.  run,  wait,  input,  memory  protect, 
mnnitnr  sefect  snd  sirvgle  st^p.  Large,  on  board 

dtspfays  provide  output  and  options!  high  and  low 
aiidress.  Tliere  is  a  44  pin  standard  connector  slot 


Quest  Super  Basic  V5.0 

A  new  enhanced  version  of  Super  Basic  now 
av^ailable.  Ouesi  wasihti  lirsicoiitpany  worldwide 
to  ship  a  full  size  Basic  for  1802  Systems;,  A 
complete  tunclion  Super  Basic  by  Ron  Cenker 
including  floating  point  capability  with  scientitic 
nolation  (number  range  i  17E^),  32  bit  integei 
.i2  t)iyion:  muiti  din>  arrays,  string  arrays,  string 
nianipulation;  cassette  l/D;  save  and  load,  basic, 
data  and  machine  language  programs;  and  over 
75  statements,  tunctionsand  operations 
New  improved  tasTer  v-Hr^inin  including  re- 
number and  essentially  unlinrtited  variables. 
Also,  an  exdusive  user  expandablE?  con^mand 
library 

Senal  and  Parallel  I'O  roulines  mcluded 
Sup«r  Ba:|ic  on  Gazette  155. DO. 


for  PC  cards  and  a  50  pin  connector  slot  for  tJie 
Quest  Super  Expansion  Board,  Power  supply  and 
sodkats  for  all  iC's  are  indud^  piua  a  d<&tailed 
127  pg.  instruction  manual  which  now  includes 
over  40  pgs.  of  software  info,  iincluding  a  series  of 
lessons  to  help  get  you  started  and  a  music  pro- 
gram  and  graphics  target  pme.  Many  schools 
and  universities  ar^  using  the  Super  Elf  as  a 
course  oE  study.  OEM's  use  It  for  trnrning  and 
R&D. 

Remember,  other  computers  only  offer  Sup'er  Bt 
features  at  additional  cose  or  not  at  all  Dompare 
befDre  YOU  buy.  Super  Ell  Kit  £106.95.  High 
address  optiun  $B.95,  Low  address  oplion 
$195.  Custom  Cabinet  wilh  dnilcd  and  labeJEed 
plexiglass  front  panef  S24.95.  All  metal  Expansion 
Cabinet,  paintied  and  $ilk  screened,  with  room  for 
5S-100  haarffs  and  power  supply  S57.0D.  NiCad 
Batleiv  Memory  Sawr  Kit  $6.95.  Atl  kits  and 
options  also  compteteiy  assembl&d  and  lested. 

Questdata  a  software  publication  for  ^BQ2  com- 
puter users  is  available  by  subscription  for  $12,00 
per  12  issues.  Single  issues  $i,50.  issues  1-12 
bound  S16.50. 

Moews  Video  Graphics  S3-&CI,  Games  and  Music 
S3, 00,  Chip  B  inierpTder  S5.50.  Starship  4K  cas- 
sette $14.96-  Exciiting  aM  challenging  space 
game.  Comptete  manual  included 

Free  14  page  brochure 

pf  compiete  Super  Elt  systein. 


Super  Expansion  Board  with  Cassette  Interface  $89.95 

"Hiis  is  truly  an  astounding  value!  This  board  has  gram  bugs  quk^iy,  ttien  follow  with  single  step.  If 

been  designed  to  allow  you  to  decide  how  you  you  have  the  Super  Expansion  Board  and  Supei' 

want  it  optioned  The  Siipcr  Expansion  Board  Monilorlhe  monitor  is  upand  running  at  th€  push 

comes  Witt)  4K  d1  low  power  RAM  fuJiy  atidrr^-  of  a  button. 


able  anywhere  in  54K  with  butlt-in  memory  pro- 
tect and  a  cassette  JTd:er1ace  Provisions  have 
been  made  for  ali  other  options  on  the  same  board 
and  it  fits  neatly  into  the  hardwood  cabinet 
alongside  the  Super  Ell  Tire  board  includes  siots 
for  up  to  6K  ot  EPROM  (2708.  2753.  2716  or  Tl 
2716)  and  is  tully  sucketed,  EPROM  can  be  used 
for  ttie  monitor  and  Tiny  Basic  or  other  purtKises. 


Other  on  boarfT  options  include  Paraltel  tnpul  and 
Output  Ports  wiih  lull  handshake.  They  allow  easy 
connection  of  an  ASCII  keyboard  to  the  input  port. 
RS  232  and  20  ma  Currenl  ijoop  for  tetetype  or 
other  device  are  on  board  and  if  you  need  more 
memorv  there  are  two  S-IDfl  slots  for  stE!tic  RAM 
or  video  boards.  Also  a  IK  Super  Monitor  version 
2  with  video  driver  for  full  capahiiity  display  with 


A  IK  Super  ROM  Montfor  $19.95  is  available  as  an  Tiny  Basic  and  a  video  interlace  board  Parallel 
on  hoard  option  in  2709  EPROM  whicti  has  tieen  I/O  Pnrts  $9.85,  RS  232  $4.50,  TTif  20  ma  l/F 
preprogrammed  with  a  program  loader./editor  and    $1 J5,  S-1 00  S4,50,  A  50  pin  connector  set  with 


error  checking  muiii  file  cassette  read /write 
software^  (relocatable  cassette  file)  another  exclu- 
sive from  Q(wst  It  Includes  register  save  and 
rea.dout,  block  move  capability  and  video  graphks 
driver  with  blinking  cursor  Break  points  can  be 
used  with  the  register  save  feature  to  isolate  pro- 


ribbon  cable  is  available  at  5 IB, 95 for  easy  con- 
nection between  the  Super  Ell  and  the  Super 
Expansion  Boanj. 

Fdwer  Supply  Kit  for  the  complete  system  (see 
Mufti- volt  Power  Supply  betow). 


Rocki/VQll  AIM  65  Computer 

6tj02  based  single  t>oafd  witn  tuMycu  keyboard 
and  20  column  thermal  pnnter.  20  char  alphanu- 
menc  display  ROM  inonitor;.  tuHy  expandable 
$419.00.  4K  version  $449.00.  4K  As^^embler 
S35.IKI.  flK  Basic  Interpreter  SBS.Ofl, 

Speciat  smaii  power  supply  5V  2A  24y  5A 
assem.  m  frame  S59,{l0.  Mnlled  plastic 
eiidosure  to  fit  both  AIM  65  and  power  supply 
$52.50.  AiM  65  1K  in  cabmi't  with  power  supply, 
switch,  fuse,  cord  asseri^,  I55S.0D.  4K  $579.00. 
AE5 40-5000 AIM  6540  w,16K  HAM  and  monllor 
51295.00.  RAM  Board  Kn  (T6K,  $195)  E3^K, 
$21 5  >  VD640  Video  Interface  Kit  $119.00.  ,A&T 
$149.00.  Cnrnpiete  AIM  6S  in  thin  briefcase  witti 
power  supply  S51B.0O.  Special  Pgcltage  Prsce  4K 
AIM.  8K  Basic,  power  siipply.  cabinet  $529.00 

AIM-  66'KiM,'SYM.''Sxi-per  Elf  44  pin  expansion 
board,  board  with  3  connectors  $22.95. 


Elf  II  Adapter  Kit  $24.95 

Plugs  into  Elf  li  providing  Super  Elf  44  and  50  pin 
plus  S-1 00  bus  expansion.  (With  Super  ^- 
pansion).  High  and  fow  address  displays,  state 
and  mode  LED  5  optional  $18.00. 


Super  Color  S-100  Video  Kit  $129.95 

Expandable  to  255  x  192  high  resolution  color 
graphics.  6^47  with  all  display  modes  computer 
controlled,  Memory  mapped.  IK  RAM  expand- 
able to  BK.  S'100  bus  1802.  8080.  BOBS.  ZaO, 
etc.  Deaters:  Send  for  excellent  pricing/ margin 
program. 


TERMS:  $5.00  mill,  order  U.S.  Funds.  Caltt.  residents  add  6%  tax.  prices 

$10.00  min.  VISA  anil  MasterCard  accepted.  SI.QQ  insurance  optional.       subjeci 
Shipping:  Add  5%;  orders  under  $25.00—10%.  to  change 


FREE:  Send  for  your  copy  of  our  NEW  1982 
QUEST  CATALOG.  Include  O60  stamp. 


156     73  Magazine  *  June,  1982 


ramsa^j    the  first  name  in  Counters ! 


9  DIGITS  600  MHz  $129 


SPf-CIFlCATlONS: 


WIRED 


r  t  OD  K  Ik.  4)1  d«T  ftK^  V  *«> 

JU*!  AC  i1i| 


The  CT  90  is^  ihe  cnu^t  virrsaUle.  feature  packed  counter  av  Ail  able  lor  less 
Uiui  S^^OQ.OO'  Ad VB Eli: ed  design  ttat\iTc*i  include,  three  bidcctfible  gule  timea. 
rune  digits,  gaif  mdicvior  and  ■  unicjuc  display  hold  function  which  hmld^  She 
dii^pltyed  count  o/ter  Lhe  tnpui  ^ig^i^  is reiiiovetf  AJs<a  a  I  OcnHi.  TC XO lime 
lnu&e  u  used  vb-h]£h  efiAble»  ruv  ncmbCAt  calibcittun  ctteclis  «|;Amsi  WWV. 
PptXML^IEy.  BO  uitf  mat  mead  lutsery  pacKeiiefruil  time  ba^inpui  wid  hiiot^ 
pQW0  lugh  ftfcbility  cry^taf  oven  lun*  hu«  wi  availabJe  The  CT-W. 
pnfofmuvce  >'ou  can  ctiuai  ok^ 


RanKT 
Sensitivityr 

ReskC^luliorw 


DupUy: 
Time  tme- 


ZD  H/tu6«>  MHz 
Less  lti*n  10  MV  t&  150  MH^ 
Less  ihan  ."iO  MV  to500  MH/. 
0.1    He  1 30  MHi  rangcl 
1.0  Hi  160  MHz  razi^) 
10.0  Hj[(600  MHirsnie) 

gdifittOr  LED 

Suj^daril  10  000  mHz,  1 .0  ppm  ?CMOX. 
OpMOfuU  MicrO'  fjowrr  ovti>4l.  I;  ppm  2CM0^C 
8-13  VAC  m  250  mJ 


7  DIGITS  525  MHz  $99 


WIRED 


JiPFCJFlCATlOSS: 


Rungt 
SeitsUivit)'? 

RekolutucjiX 


Ttnw  base 
Power 


20  H/  u>?2.'i  MHai 
L*i>lhiin50  MVlo  150  MHk 
Lcs«  lh*n  150  MV  to  500  MHz 
1  0  HH5  MHz  rimfcl 
100  Hi  (SO  MH2  ranjel 
100  0  H/  (500  MHz  rmnfej 
7  diiiu  0  4"  LED 
10  pfwn  TCXO  2040=0 
12  VAC  «t  230  ma 


T1*e  CT-70  breplts  ih«  pnce  barrier  on  lab  quality  frequency  counteri. 
Deluiie  features  such  as;  three  frequency  r^ngea  eafb  wiih  pn^amplin^atioiii 
dual  telectabk  ^le  lunca^  and  file  activity  indication  make  mea^urcmcniA  i 
■nap.  The  wide  frequency  range  enables  yoa  to  accurately  measure  sitnalt 
from  audio  thru  UHF  with  I  0  pptn  aci^acy  that'*  000 1 %f  The CT  70  it 
ilie  aiiiiwer  to  aU  your  measumnent  necdi,  tn  the  fields  lab  cn*  liam  shack. 


PRICES: 

CT-70  wi  red  1  ye  ai  warranty  S99. 95 

CT-70  KiU  90  day  parts  ww 

ranty  g4.95 

AC-1  AC  idapter  3.95 

BP  i  Nieadpact  +  AC 

adapiet  •  c  har^r  1 135 


7  DIGITS  500  MHz  $7955 


MINMOO  A^ired.    i    yctr 

wamnty  $79,95 

AC-Z  Ac  adapter  forMINl- 

100  1.95 

B^'Z  Nicad  pack  and  AC 

KlapCcir  cltai^r  1 Z  95 


Herc'i  i  handy,  gene  rat  purpose  ccninter  that  provides  moil  counter 
juncupns  ai  an  uDbelievabJe  price  The  MtNJ  100  doesn't  have  the  full 
frequency  range  or  input  impedance  qualities  found  in  higMr  price  uniik  but 
for  basic  lUF  signiJ  measurements  n  can't  be  beat!  Accumte  measurements 
can  be  rnadie  frxvn  I  MHz  ail  the  way  upta500  MHz  witheiceJIeni^fUifiviiy 
thrDufjMiuf  the  range,  and  the  two  ^te  tirrkci  lei  you  select  the  reioltilKHi 
desired  Aijkl  the  oicadpadkcifsikMi  and  the  MIN^  1 00  makes  an  kleal  addition 
to  your  loot  box  lor  "iivthe^fieiif'  fnequerocy  checks  sjkj  reptirv 


WIRED 


SPECIFICATIONS: 


Range: 

Sensilivity* 

ftctolution: 

Display: 
TtEne  tujc: 


1  MH2  Io50a  MHz 
Less  Ihan25  MV 
LOO  HnUkiw  gjitej 
LO  KKk  fast  gale) 
7  digsti.  0  4    LED 
ZO  ppn  20-40  C 
5  VDC  m  200  mi 


8  DIGITS  600  MHz  $1591^ 


WIRED 


SPEClFlCATrONS; 

Ranite:  2^  H^  to  600  MHz 

Senjiiivity:        Lett  than  25  mv  tct  130  MHz 

Less  than  150  mv  to60U  MH£ 
PLtsohiiMOit       to  Htf&O  MHz  r»a§fi) 

10.0  Hi  (600  MHz  ranftJ 
Display!  8  digits  0  4"  LED 

Tune  baie        20  ppoi  20-40'  C 
PcF*ei::  J 10  VAC  ot  1 2  VDC 


TheCT-50  isa  vers-itile  Eab  bench  counter  that  witi  meaiure  upto^OO  MHz 
With  S  digit  precision.  And,  one  of  its  beat  feat  tires  is  the  Receive  Frequency 
Adapter,  which  turns  the  CT-50  *nlo  a  digital  readout  for  any  reeefver-  The 
adapier  is  easily  ptopmnu^sd  for  any  receiver  and  a  umpki^iitnectian  to  tbe 
necerver"  1 VFO  it  all  that  is  required  fof  use.  Adding  the  receiver  ad^rter  m  no 
way  Uisirts  the  opefatton  of  the  CT'50.  the  adapter  can  be  conveniently 
twtLcbed  onm  dit  The  CT-JO^  ■  counter  that  can  v/^tk  (foubto-  chityf 


Vttt. 


^O 


^..-"^^IfcjIHT^H 


JTllt 


PttiCES: 

CT  50  wired,  i  yew  wazranfy 

CT  50  Kit.  90  day  p*fU 

warranty 

RA  I .  neceiipfcr  adapter  Itit 

RA-I  MnnedaiMtprv-prugjaiiv 

roe4  ( send  €!opy  ol  receiver 

fclwnimlK:} 


S 159  95 

U9-95 
U/95 


29.95 


DIGITAL  MULTIMETER  $991^ 


WIRED 


PRtCE& 

DM^TOO  wind.  1  yew  n-^nmity 

59*95 

DM  700  KiL  90  day  pam 

niairaniy 

79.95 

AC  L  AC  adapuw 

395 

BP  3.  Kicad  puA  *AC 

adapter  cfwEg^r 

19.95 

MP  L  Prolx  kJi 

2.95 

The  DM'?CO  oKeTi  profcssiiinjl  l| unlit y  perform amie  at  «  hubhyi^t  prLie. 
Fearurci  linLludr.  Zt>  ijiffrrcnt  r unite*  and  5  functioni,  all  arrjin|ii;rd  in  a 
convenirfiE,  easy  to  use  ^ormar  Mrafturemmu  atr  JthpUvrd  t>n  «  larsf  y/: 
digft.  y^.'  inch  LED  readout  wirh  aut^ifnatkc  dbcimail  plft4fn\FttT,  jtiromjtiiL: 
polirtty^  *Mfpft»nir  mdu^nrtft  mt%d  i>:frvftUMd  prorcctwm  up  (»*  12S0  vdfaon  all 
f  anees,  mj^mR  n  vtrtiullv  eoot'proA»f^  Tbc  nM-70f)  kiokk  Ktrvr. «  ha2iii&i.]tTu-. 
fei  iNjHik,  TU|Q(eii  AfiS  case  ^rth  civivrfuent  rcnractabli-  nh  hail  makes  ir  jn 
idc^  itti«ft[|iifn  TM<  any  *li*ir 


SPECIFTCATIONSi 


DOACvoil* 

DC  AC 

Cunreut 

Resistance: 

Input 

impedance:^ 

Accuracy: 

Powec 


1 00  uV  to  I  KV,  5  rangeB 

0 JuA  to  2  0  Aitipv  5  ranges 

0  I  ohms  to  20  MegMihiftL  6  ranges 

10  Megohms,  DC  AC  votu 
0  1%  bafK  DC  vc<ta 
4  'C  celh 


AUDIO  SCALER 


For  high  rcsolulion  audiu  mcasurementx  multiplies 
Upjn    frequency, 

•  Great  for  PL  tones 

•  Multipliev  by  10  Or  100 

•  0  OJ  Hz  rcbolutionf 

S2<J  *J5  Ku       S39.95  Wired 


ACCESSORIES 

TekiCopic  4 hip  antcrma-  BNC  plu£ 
Hifh  impedance  probe,  hghi  loading 

L<^)W  pasa  probe,  for  audio  measurements       - . 

Direct  probe,  general  purpufie  usage 

Till  bail  for  CT  70,  90.  MINI  100 
Cctilor  burst  cahbraljon  unil^  i:a1ibratFs  counter 
againki  color  TV  sigr^ai.  


S  7.95 

15,95 

15  95 

1295 

J. 95 

U95 


COUNTER  PREAMP 

Kor  mcasunnii  rtrifmcty  wcgk  ^ij^dK  fruim  I  Ota  1,000 
MH:.    5imii|l  swet  pitwfreJ  by  piujj  ir^nsliirmer-inkludtrLi 

•  Flat  25  db  gam 

•  BNC  Connectors 

•  Gnal  for  ^niffiri  RF  'v^ith  pick-up  loop 

$54  95  Kn      544*15  Wi^ed 


rsmseij  eiEctranic'sJnc. 

2575  Baird  Rd.  Penfield.  NY  14526 


^  62 


PHONE  ORBERS 
CALL  716-5g&^3950 


wmtw  n   >«f  ^^•^4^i  *tmm  !•<   ivlund    Add  %       ^9*  ilt«p  r«g 
^%t^*ltmt*  to  a  mtaM"**nm  af  1  <  0   OvU'tHM  add  I  !p^    CQD  (idd 
IT  O'd««».rfl4i^¥<0    ■441*  M)  Hf  *m*49'i^  o4rf^      >c- 


Ltst  af  4laver^rse/5  iyn  t>s^e  ft 4 


73  Magazine  •  June.  1982     1S7 


c®MMyif^»Ci^Tn©iNi 


Phone  Hours:  8  AM  -  5  PM 

•!■      I   ■■    ~ 
OUR  MOST  POPULAR 

SCANNER  JIL  SX-100  16 
CHANNEL 


Mon-Sat 


^»«i 


p   * 


1 


PROGRAMMABLE 

SCANNER  STILL  ONLY 

$199.95 

I   I  ^  I 


DAIWA  CN  720B 


YAESU 
FT  208  R.  r 
FT  708R  ^ 

I 


YAESU  FT480R. 
FT  680R.  FT780R 


1  TR7730 
BONUS  BUCKS 
SPECIAL 


III 

t 

TR2500 


YAESU  FT-ONE. 
FT902DM.FT101Zn 


KENWOOD  TS  830S.  TS 
TS530S.  TS130SE 


•*— »•— *— ^"1- 


r^ 


r,t- 


l;^4l^i.^B 


^Bk>    ^^K        ^ 


a 


Communications  Center  is  proud  to  offer  name  brand  amateur  gear  at  discount  prices 

backed  by  knowledgabie  sales  &  service  personnel.  We  also  stock  a  wide  line  of 

reconditioned  used  gear.  Call  today  for  your  cash  quote  or  trade. 


ICOM  IC2AT.  IC3AT, 

IC4AT 

IN  STOCK 


null 


BIG  POWER  ON  TWO 
METERS.  500  WATTS!!      UST  $599.00 
DENTRON  CLIPPERTON  V 

INTRODUCTORY  SPECIAL 

$469.95 


MIRAGE  B  108 

B-1016.  B  3016.  D  1010 

CALL  FOR  SPECIAL 


HYGAIN  TOWERS, 
ANTENNAS.  ROTORS 


I 


jom  iiLicirnoiici  ciiNnrsi^ 


ij  ■ 


ii^i(pf  fr.,vr;t 


WE  TRADE 


1840  "O"  Street      Lincoln,  Nebraska  68508 
In  Nebraska  Call  (402)  476-7331 


*^2a 


1S8     73  Magazine  *  June  J  932 


LINKS  •  REPEATERS  •  TRANSMinERS 
RECEIVERS  •  PREAMPS  •  CONVERTERS 
TRANSCEIVERS  •  POWER  SUPPLIES  • 


TRAHs«,°T?^S^ QUALITY  VHF/UHF  KITS 


AT  AFFORDABLE  PRICES 


FM-5  PC  Board  Kit -ONLY  $159.95 
complete  with  controls,  heatsink,  etc. 


SAVE  A  BUNDLE  ON        *f^ 
VHF  FM  TRANSCEIVERS! 

10  watts,  5  Channels,  forSM,  2M,  or 220 


4 


^^ 


V 


X^       r^P 


t^^ 


>^?^^^. 


.<c'V* 


ft 


lV^ 


e 


J6 


,•>■*■ 


<^^V'^>^<"•^;^v-■'V*    + 


H/GH  QUALITY  FM  MODULES  FOR 
^^ ^  REPEATERS,  LINKS,  TELEMETRY,  ETC. 


I 


•  B76  VHF  FM  RECEIVER  for  lOM.  6M, 
2M,  220.  or  commercial  bands.  Fantastic 
selectivity  options.  Kits  from  $84.95  to  S1 09.95 

•  R4S0  UHF  FM  RECEIVER  for 380-520 MHz 
bands.  Kits  In  selectivity  options  from  $94,95 

•  R1 1 0  VHF  AM  RECEIVER  Kit  for  vhf  aircraft 
band  or  ham  bands.  Only  $84.95. 


•  COR  KITS  Witfi  audio  mincer  and  speaker 
amplifier.  Onty  $29  95. 

•  CWID  KITS  158  bits,  field  programmable, 
clean  audio.  Only  S59.95. 

•  A1 6  RFTIGHT  BOX  Deepdrawn  alum,  case 
with  tight  cover  and  no  seams,  7x8x2  mches. 
Onfy  $18  00. 

•  SCANNER  CONVERTERS  Copy  72-76. 
136-144, 240^270, 400-420,  or  806-894  MHz 
bands  on  any  scanner  W1red/te6t©d  Only  $79,95. 


•  T51  VHF  FM  EXCITER  for  10M,  6M,  2M, 
220  MHz  or  adjacent  bands.  2  Watts  contin- 
UOUS.  Kits  only  $54.95. 

•  T45t  UHFFM  EXCITER  2 to 3 Watts on450 
ham  band  or  adjacent  Kits  only  $64,95, 

•  VHF  &  UHF  LI  NEAR  AMPLIFIERS.  Use  on 

either  FM  or  SSB.  Power  levels  from  10  to  45 
Walts  to  go  with  exciters  &  xmlg  converters. 
Kits  from  $69.95. 


C 


w 


VHF&  UHF  TRANSMITTING  CONVERTERS      VHF  &   UHF 


IVING  CONVERTERS 


For  SSB.  CW.  A7V.  FM,  etc.  Available  for  6M.  2M. 
220. 440  with  many  IF  input  ranges.  Converter  board 
kit  only  at  S79.95  (VHF)  or  S99,95  (UHF)  or  kits 
compJete  with  PA  and  cabinet  as  shown. 


20  Models  cover  every  practical  rf  and  if  range  to 
(isten  to  SSB.  FM,  AIV,  etc.  on  6M.  aM.  220. 440.  and 
110  aircraft  band,  E^en  convert  weather  down  to  2M! 
Kits  from  $39.35  and  wired  units. 


VHF      &      UHF      RECErVER 

PREAMPS,  Low  noise. 

VHF  Kits  from  27  to  300  MHz.  UHF 
Kris  from  300  to 650  MHz.  Broadband 
Kits:  20^50  MHz.  Prices  start  at 
$14.95  (VHF)  and  $18.95  <UHF).  All 
preamps  and  converters  have  noise 
figure  2dB  or  less. 


•  Call  or  Write  for  FREE  CATALOG 

(Send  $1.00  or  4  IRC's  for  overseas  MAILING) 
•  Order  by  phone  or  mail  •  Add  $2  S  &  H  per  order 
(Electronic  answering  service  evenings  &  weekends) 
Use  VISA,  MASTERCARD,  Checl(,  or  UPS  COD. 


amironics,  inc. 

65'RMOUL  RD.  •  HILTON  NY  f4468 

Phone:  716-392-9430  ^33 


Hamtronics^  is  a  registBred  tr3iiemark 


S  SfCCmUSTS  •  CUSHCflflFT  •  DAAKC  •  HAM  KCV  •  HUSTUR  •  HV-GflIN  •  ICOM  *  KHNTnONICS  ■ 


S 


3 

01 


8 

& 

8 

OE 

ca 

8 


8 


IS 


8 


SONY 
ICF2001 


DIGITAL 
DIRECT  ACCESS 
SHORT  WAVE  RECEIVER 


•  150KH2  -30  MHz  +  FM  BROADCAST 

•  PLL  SYNTHEStZED  WITH  SCANNtNG  &  MEMORY 

•  AC  ADAPTOR  INCLUDED 

•  1  YEAR  SONY  U.S,A,  FACTORY  LIMITED 
WARRANTY 

•  AM/CW/SSB 

-  SURPRISINGLY  AFFORDABLE 

CALL  AND  ORDER  YOURS  TODAY 


OUR  BEST-SELLING  MULTI-BAND! 


^ 


I 
I 


^ 


(iMPg'miNO 


^^ 


AS  LOW  AS 

$n  ^  50 


94 


One  half  the  length  ol  ctanveniiona^  half-vvave  dipotes 
Mullibafid,  Multi-Jrequeticy. 

Maximum  efticiBUCy  —  no  Iraps..  loading  cotfs.  or  siuDs. 
Fully  assemDieo  anO  pre  tuned  —  m  measuring,  no  cutting. 
AJ!  weather  rajed  -  l  KW  AM,  2.b  KW  CW  or  PEP  SSB. 
Proven  perlorfnance  —  morfi  than  10,000  have  been  delivered 
Permit  use  ol  the  foil  capabiliiies  ol  today's  S^bantJ  xcvrs 
One  feed  line  for  opsration  on  aN  bands. 


eO-40HO/A  80/40  Mtr  bands  (69). . . 
75M0HD/A  75/40  Mtr  bands  <66). . . 
75-10HD/A  75/40/20/15/10  Mtr  (66). 
aO-10HD/A  80/40/20/15/10  Mtr  (69), 


Add  $5,00 

for  shipping 

(Cont'l  U.S.A.) 


mm^^immm^m^mmmim:^^^^^^^^'^ 


99.00 

94.50 

126.95 

132.00 


pi 

ill' 

m 
i 

k 


e%z 


?,&- 


Eavesthfrnter 


i 


AMECO  ALL-BAND  PREAMP! 
Our  Most  Popular  Preamplifier 

MODEL  PLF-2 


$ 


95 


^il^ 


p1ti$  S3.00 

shipping 

(CDnt'l  U.S.]^ 


All  The  world's  sh&riwave  brctadcasl  barids  are 

yours  wiih  the  Eavesdropper  Aii-Band  antenna. 
IndividuaMy  lun^d  iraps  nnakc  ih^  Eave^c;] rapper 
ut^ork  Uke  aeven  separate  aniefinas,  each  tuirtad  lt> 
a  diHerenit  insernalion^al  broadcaal  band.  Also 
t:owejfS  1 1 .  and  6<JW  iMndS  iS  well  its  100  (oot.  72 


SHORT  WAVE  BROADCAST  ^ 

■  "■  I 

■■44^1 


RECEIVING  ANTENNA 

AUTOMATIC  BANDSWITCHINQI 


52 

plus  $3.00  shipping 


-   COMPLETELY  tWEATHERPROOFr 

•  COMPLETE.  NO  ASSEMBLY  NEEDED! 

•  60,  49,  41,  31,  25,  IS,  IB,  13  &  11M  BANDS!  ^:v 


ohm  baJanced  (ee<Jfirie  pfovicfes  an  exact  maich  to 

the  anlen-na  on  every  fcanci  Comes  compleialy 
a^sembLeO,  and  re^dy  10  msiall  with  50  h.  ol  450 
lb  te$l  nylon  rope  OweraU  lengiri:  42^10^  Wtre' 
ll4;'C[:>pp&r  Bands  h^  itching:  AutoTnaTic. 

Impedance  lo  rqvFi  5C175  Qtims  balanced- 

OnivfSi.aS 


^ 


MODEL  PLF-2... Improves  weak  signals  as  much 
as  image  anct  spurious  rejection  of  most  receivers- 
Direct  switching  to  rec,  or  preamp.  Includes  pwr, 

supp.  117  VAC  wired  &  tested. $52.95 

MODEL  PLF-2E...240  VAC  50-60  Hz  operation 

,.... $57.95 

MODEL  PT'2,..For  transceiver  use.  Continuously 
tunable  from  6  to  160  meters.  Features  dual  gate 
FET  transistor  amplifier  for  improved  receiver  sen- 
sitivity and  low  roise  figure.  Requires  no 
transceiver  modifications  and  can  handle  up  to 
250W  transceiver  output,  117  VAC  60  H2. . . .  $79.95 
MODEL  PT-2E,,.240  VAC  60^0  Hz  operationS84.95 


TRANSCOM 

PROGRAMMABLE  SUB  AUDIBLE  TONE 
ENCODER  FOR  ICOM  HANDHELDS. 


.i¥i'i.:=>~!,Vt:jKi.,*i 


,.^_^r^->:.. 


$ 


29 


95 


Plus  $2.00 
shipping  and 
_  handling 

•ONLY  1.1"  X  55"  X. 2" 

•  PRESET  OUTPUT  LEVEL  FOR  IC2A 

•  LOW  TONE  DISTORTION  LESS  THAN  1% 
THO 

•  TONE  STABILITY  ±  .2%  Hz  FROM  -20C 
TO  +70C 

•  1  YEAR  LIMITED  FACTORY  WARRANTY 

•  5VDC  POWERED 


ICOM     WE'VE  SOLD  FM  GEAR  FOR  14  YEARS 

&  IN  OUR  OPINION  ICOM  IS... 
"SIMPLY  THE  BEST" 

I 


it  ■; 

A*. 


IC2A,  IC2AT 

OUR  MOST 
POPULAR  HAND 
HELD  &THE  BEST 
VALUE  AVAILABLE 


•  COMPACT 

•  QUALITY  CONSTRUCTION 
•VERSATILE 

•  AFFORDABLE 

•  WIDE  RANGE  OF  ACCES- 
SORIES AVAILABLE 


IC3AT(220MHz) 
IC4AT  (440  MHz) 


IC25A 


A  LITTLE  PACKAGE  V^ITH  A 
LOT  OF  BIG  FEATURES... 

•  25W  OUTPUT        •  MEMORIES 

•  ENCODING  MIC  •  SCANNING 


CALL  FOR  PRICE  &  AVAiLABfLITY 


TJ^  /\rfcrvm      ^^^^  ^^  WRITE.  MASTER  CARD,  VISA,  MONEY  ORDERS,  PERSONAL  CHECKS  TAKE  3  WEEKS 
TO  ORDER:     TO  CLEAR,  ACCEPTED.  INTERNATIONAL  ORDERS  WELCOME,  PLEASE  REQUEST  PRO  FORMA 

INVOICE. 

HOURS:  MON.  THRU  WED.  9:30-6:00,  THURS-FRI.  9:30-8:00,  SAT  9:30-3:00 

STOP  BY  AND  VISIT  WHEN  IN  THE  CHICAGOLAND  AREA!! 


z 

m 

3 


O 


S 

♦ 

8 


SI 

M 

4 


unc 

MINI  STEREO 

AM/FM  RECEIVER 

WITH  HEADPHONES 

for  Joggttt,  Cj/eJ^srs, 
Skmtmtt  A  Sports  Bvmntr! 

FEATURES;  Ughtwelg^l  r>#iidphdfi*A.  Utl^'fgm 
t>aL3nce  cOntror  Full  l^t^i^ly  *f*r*D  adund.  Addl 
lionali  blac^  solt  eanymg  case  A  «h<)u1dar  airap  Belt 
clip  iriands  it^i  Optmta*  oo  3  AA  c«il  balierias  (nor 

Model 2830 y«i  fHitm^mm  .... .:  $34 J5 


SPEAKERS 


f  AII201  1^  J9 

2 "  *    Roynd  —  B  Otwrt 

.a  Watt  <4"  Lhj1s» 

Sia:  TL"  n  V 


-1 l±. 

^  Wfftt  (4  rnqtml.  hoiss) 
Lirge  Ceramic  Mac^ef 


iSI  National  SemjcofKKJctDT 

RAM  SALE 


STATIC  RAMS 
HM21 14*4-2  4K  CZOONS) , . 

Mbt2114N-2L  4K£300N^LowFDwef 
£  LjiCH  I  laasiii^n  fioo  Each  t 


MM2l47li  4KmjNS) 

.-  EACH  t^UMS^  itoa  &tici+(4ii»wi 

MMfilieiM  1»K_ 

-  -4CM  ^AMAoQ  IT^EJlCHtiri&J»ADQ 

PYNAWIC  RAMS 

ijS  EACH  ntis^bt}  iw  EJOH  ti  -v^ooion 
MIISZ90N-2  iaKl150NS)4>t« 

0  EACH  I194ArtQ4}  1100  Ei«CH  tlHODrtot) 

'.Bi  EACH  l•.l^BAtm  nm  aBH  ttf^oanot) 


.t2.95eac^ 
..,$4 -95  each 
, ,  $14.B5  aach 


ft4.g5eacti 

.12.95  aach 

.  St. 05  aach 


EPROM  Erasing  Lamp 


«  EnHi  2706.  :?71fi,  1702 A,  S20^L1.  ^2Q4Q^  Mft. 
«  Emn  up  tA  4  tihilp*  williin  30  rttimitn. 

•  SfNcial  cnnctuciiv«1oiiniin*r<liniirutMital>cbuiltNi{i. 

•  Bttth^fn  H.tatY  to£lK  to  pfmt*nt  yv  aMpDwr*, 
-  CompKt  -  0nlv  7  S/fl  ■  M  2  7/e  "  *  2" 

•  Complvt*  with  hcildirft  Xtnv  f  o#  4  ^ipt. 
UVS-IIEL    R«p(«cvmint  Biifb    . ......   |16.eS 

$79.95 


UVS-11E 


JOYSTICKS 


J5^K 


J£  5K  SK  Linsar  Tt^vf  Poii 

i$-l  DOK       10QK  tinair  Tifwr  Pt>tl 
JVC^O         40 K  [2}  VldKi  ConiruMiP  tq 


•I     •!    »     f 


$4.3S 
$4.ii 


MUFFIN*  FAN 

lin  l(M  liHRimirolil  NM)iM*g  ■pfrilEflLtoni. 

'*  KWUilJc«l  iiilnQ  at  ■ow  «>  nC-ll 

•  tncHV  niHi  10  ym  ctsni  dL%  it  lO'C 

•  i|fiiptdinD«  prVtvetad 

•  fot  JirtMfnti  Id  7D*C 

llfV.    fWiOHT.    U   W.tli,    lOSettii   - 

MU2A1 $9.95  ea. 


MICROPROCESSOR  COMPONENTS 


SQBOA/BOHaA  SUPPORT  DEVICES 


t*4immfi- 

CPIJ 

ut-wili 

l^lt    mpuC/lOvtElUl 

E^PULt 

PVt«jrHr  <M*r'LJi*t  Caralral 

D*»lirt 

gj.DlftfManal  Bhti  DrN«* 

pPH»i 

CiDc^  AkixriVTO'/'lE^iHr 

OPtZH 

Iflii-t  CH'Ft'M 

oMan 

Sri4«A  C*|i1rQl4»r/aua  DfJwT 

t^PIUi 

SyHon  Cuntrallcir 

|T*B««J 

i/V  F»Si»friw  fnr-CS^iei 

JNU^ 

4svm:hroTMH«C«inin,  E'lwiurxl 

tytvii 

n'Ofl   Cwrnra.  1^  lU&ARTli 

E?4^aj 

4i^«4    iM-NtT^l  TUncf 

lJf<L-« 

*»ri>|.  PBiWt]iT*l  I/O  <«**! 

L-IA' 

4^i»»    DMA  C^^t'lri 

njwjpi 

4*ri^   IftMM'i'vVl  CanAriii 

r-**™ 

<Vo«   icnr  C«f(TEriiiP 

li^-^:t 

IHa4  K«ip|Man>IMvUv  tnlaitj 

Li1J« 

■iVKten  Tlmin*  OK*t«ii<l 

LT*t« 


1* 


v.* 
tM 

Mm 


vti^ft 


JE215  Adjustable 
Dual  Power  Supply 

Gfffiffil  OtstTiiiTion:  Dm  JE21S  ^  •  Ouil  Fdww 
Supply  wnh  inijtptndiBti#ntiblt  potiiiirfr  tml  ntga- 
tnn  oytput  voltapii.  A  Rpanlt  adtucliri'tnt  fpr  tach 
o1  ittftupfilLei  prowidtsihi  u$ct  unlimjfti^  tpplfuliorit 
for  IC  turrtnt  voltagt  requvtrntnti.  T^  m^pti  can 
abo  bi  uMd  M  I  gtrrtfit  till  purpoit  nwrinlito  pouvtr 

tiOt.    Vifi   naa^    1  2VDC  ta   1EV£3C 

•  PQ-A«p  DutiMJt  fMCil  fwpipPTt 
SVOC#  500mA,  I^VD^P  7S<kTLAi. 

iaVDC#  ITSmA 

•  Ha«ttifili  nvMtiitar  CttOllflf 

•  LEO  "on'"  4nd^«tOf 

•  f  aOVAC  ineut 
JEZ1SA^|.CMJPdM«f$upplvKft(iiiliD«n|.  .  £24 J  S 


^-^ 


(■PiCltjf*  riCFT  irr 


6Mt  «i»frt«li>t  tft  i^o^^tt'.ictiQin  tc  «Li7^t- 


$14  9& 

SI  2.95 

JE27t>Vir>H«.«^y.Kil,fr1&VC3C.tQl  5«mp     HS.ftS 


iE200n«a.P«MvSkl«l«ViC*lt&Vl>C.  Ilfnpl   . 


i^BOO.GeOO  SUPK>nT  DEVICES 

.  LSIjC'  U^  WdA  dot*  WfS  RKU 


i'^Lrta 


■J* 


^* 


HlCROPflOCESSOR  CHIPS  — 

CPU 


1* 


ILM 


1173AM 


£HirrflEGlST£n£- 


■■■tKjm 


am -It 


LM 
ua 
Lit 
LA 
X« 


-DATA  ACQUlSmON 


UCIO 


MCHOtUl 


t&n  D^A  C4RB«n«i   |DAiC^VLC«l|  tJi 

•^BlE  CVAClMnrtrMt  {OAdHBt-CHI  I.  A 

UnMi'Mt  Acin«  FHtlW  >■»  LB 

TBii^fi  T<ifii  Li<3v  Biim  FBtu  14.^; 

te*ien  T***  +i«9r  B*n*  FMin  !*,« 

Suov  CiJjII  Qd  Amq.  IJA 

CAiHi4nl  Cufrant  EbiM^a  1_B 

Svnol*  4^  l-iDiD  AmpilllM-i  ).V 

■  Bit  A/D  Cpcivefiar  [1  LJiB]  4.S 

9  Bit  OiP-  CoPMartH  td-Vi!  Lin  j  j' A 


DATA 

AuCSfTCCN 
bAClMLCM 
DACHmjCN 
CtMHkiN 


I  Bll  A,rU  Cim^wEliF  n-Elri.  Wulll.l'        l^il 

I  an  A/» c  w fptip  tiH:pi ,  mu>ii i  j     )<fi.i<i 
ui-Aii  ei/».c:4inv  uicta.  Cionw^.  t.t.m%i  Mm 

IAi9.l1  piiACaFI^.  MUM*  ^B^*.  III.ID*i|    IS 
I!1-»I4  U^A  Cuhm  Ih  i|$A«  U>i.i  hm 

ID^iHIl  Q/A  COilWfltr  duim  UH.)  L% 

i7-#ii.a^A  r.jsnp*!)*!  tB.Bh  uhhI        i.m 

i  C.1<i>|Nn«i  Miih<nii<iip  LJI 

Mn^-ttAMaUAKT  «.« 

RAM'S 


jSt-.i  bulk 

xmmt  M«l«  IWQt 
MPiri  ti|iti4  mti*i 

tilVI4|IJ#Di||i|   HP,  OriHf«H.  A»it  tu 


HH  SHII 
I'M! 

.nil  itum 

SIT 


Tl 


Tl 


m  art  KMt  I 

-M  DgftKPK 

m0,  c.##0it  Nw,  "iitf.  -awi 

■KCVftOW 


fl 

I.W 

I  il 
f^ 

I* 

4JB 

iM 

M 
t» 

IB 


Ui 

14 


UI 


m^AOM 


av*f  > 


M^i^ 


j^iiUMt  Cik^caw  otmmmn^  ttimtrnt  Cta»$ 
iflMOt  Hi AO  ONLY  «tli&«li|  — 

i3  A:*ft«  C-5>*15-*i  C»*-  0#fc 


Lilt 

LUB 

nil 


IIICnOPROCESSOR  liAAiUALl 


7Jt 


■TEL 


Ay44UI 


AY^ 
HOUH4 


-  SPECIAL  FUMCTIOM 

DM'  MO*  dtCh  Drtv«r  AMJ]  UI 

Pl*«*l  On*  CsMlVMi  JIJi 

f» MMt^l.tPt'  £I^>»  H  ■ 

>nM**f4«MH'  Am*  t  mi*  f>4*&  111 

M«cp*t<^if#W4  *ivi'itO*t«i  muM  f.it 

iji4  Otnci  I. ED  P'^^# 

Ul^rwwiVtti^f  «Ptn  W^Ol«J|  HAW  r.J| 

4  Dli^ti.|  I.ED  0**wt  m>/*t  ^ito  lAI. 

B-hu^  VAC  ''Kx^r  Hf  iirt*  tr*V^  It"^  >    ^B 

EPH0NE;KE  V90ARD  CHIPS 

Tai46fltj#vt  D'JMli  NH 

L,ldUV  i^ii^^ii  s3li<i*rt1i'U'  tLB 

N^«V*l>*nt  tn^HW  tH  vivtl  im 

ri.4^B94«B  C4t<tM*<>  |tt  vivU  r.H 

KjyfeavQ  I  ite4a*»  ^liflk'ivrl'  *,;>» 

^4l  Mutll?'!  I'-UlW  CHwl*'  F.H 


lining 

NftHt. 


EECO  flocktr  DIP  Swilch  —  'Minl-Dtp^w"  a40a  Sirl«» 

THE  MOST  UNIQUE  DIP  SWITCH  AVAILABLE] 

M^N1-PIP  I?  dH^lgnM)  b  ntnrtlh  ill  n-ntut  IhahjH  iir  [up' i^wUcnki  Lr^hNUiilUEunN.MInlMti  KxikliHg 

rod  ^l^l^n  u  isnnant  acEldirMql  vlujrian  jimIjjim]  wllwtrN  nnitiHUF  ilni'iJMcip  >^iitl*i|)  ar\^ 

«  TtntilfiJili  tin    ira  s  .3M  I  i  U  [  T  Al]  tiMirl  ■  PCI  ir  dq  IMhiin  MMMMII  *  PtlUN* 
cti;)5i|[3y/wlpdi4  K|la*i  Mith  gnlij  »nliDl  *  Totil  ml  inij  buhaf*  ml 


hi. 

3 

4 

S 


tuirtliiiintleit 

ra 

At  (Til 


SaciiBf 


Ihhci 


Purl  Nt.        I*ta. 


tfill* 
ipli 


,71 
Of 


1  9!] 


!4ffi»4 

1400^1 
i4CD-H 
?40I»-I 
f^tll'IQ 


I 

T 
I 
■ 


SBfihtjuulInn 
'lSJ4ai 

in4»Ti 

ininTiP 


SauUl 

14  pin 
14  plH 
ID  filn 
1U  jilit 

?|iiiiit 


1.19 

i.lg 

1.311 

i.^a 


10,/  t.W 

iHMD  g^ 
iq/ii  B5 

Id/IZ.H^ 
I0''13.|l£ 


GRAB  BAG  i£    ^^ 
SPECIALS  "^ 


-CAFAcrrans 


QfllBiD    ilM  pl^cat  fta^ali'SLol  Car 

aiin,  BIwMl.,  Wltt«l»,  Malorm 


%^,m 


$1D.0D  MInrntiim  Drder  —  U.S,  Funci&  Only 
Calilomta  R«sid«nts  Add  6%  S«4»k  Tax 
PKlite  ^  Add  b^  pltfs  SI. 50  ln«4iririea 
Send  SJI.S.E.  fof  Uonlhtr  Saf&  Fff^Ji 


SfXic  Srwflit  —  25c 
Sand  BAc  Poi. tafia  lor  yoMr 
FR£E  I9ft?  JAMECO  CATALOG 
Pficaa  Subiact  lo  Charni* 


[M«t  EUKSWue*' Woria««d* 


PIEW 

CATALOG^ 


lameco  4^*^ 


ELECTRONICS 


"■**'. 
.^^J^ 


e/62 


13SS  SHOREWAY  ROAO.  SiLMONT.  CA  94002 
PHONE  ORDERS  WSLCOME  —  f415)  S92-S09?      -'^ 


BOOKS 


3(WI1     NalEnnaFCMClfi  Q^kEA  B(K>ll  ... 

iMD  i3floei^  74C.  CD4an.  and:  AfQ  Camwnma 
3IHID1    HBttoH#<  Intoffacf  PajB Baah . . . , ... ,, 

im  4a«i^Mi}  OP-  Dsano,  osssodl  gsjsboh^  mc 

vHMa    Hadonsi  Liri«B.r  baXm  BvQk 

1*3^  vagal  LV-.  LF.  ADC.  DAC   IN  SeriB 
WHMM      NltJein«d5«ri»l9  -  Bpaid  Lmd  Campmvr  IZ?4 

VWM     hBtJDnvl  TTl  Ldific  Data  Baak 

i|B4  i3^efc3  740D  L5.L  n,S,.  MiS  DVtSO^iO  Svim 

30D06  Above (3)  30001 .3,5  as  set  S24.95/lot 


..KH 
Htft 

.■an 


fuli  .[Iffli  Blu«4.  for  knt^'s  -pruliEli.  iML  WiMMI^ 


.•HH 


AC  and  Ut  Wall  Transformers 


^ 


WW^  Un»f*IM4  PUB  H«a 

av^tftwirsiiiv 

SelecthA    vottpB"^    fAUVDC 
RDivirr  —urtifiB  i-tH  «u  '-  - 

ItfW  itam  iicintHw  la  pti^a  —  ^  > 
uw  nvn  wiaptir  mmfi^Tf 
iaiv«ip£lniiA 


ACiOHt 

ACim 
DC  m 
□caail 


DCTaoe 


tiTlMQHr 
IfTVfaDHz 

trrvwHt 

11 

iJlAr^itXF 
IfFWIBHz 


IZVACaOmA 

tTtTAC 

tZVACl 

fVDCSDiBA 


S9=r 


CONNECTORS 


PQZ5P  D-SubfTimiaturt  Phlf  ...... 

&B7&S  D  SubtninlBtur*  Sodkat   •  .  •  . 

D204 1S.2  Scnw  Lock  H«Ii«f.  IZ}  De25S/1> 

DBS123G  Cover  for  DS25P/S 

22/44^  P.C.  Ed««  1221/44  f>tn] 

UGBBAJ  e^C  Plug 

UG89AJ  BNC  Jach    ....«»..,,.■ 

U<Il7&/U  UHF  Adaptat  .......*.. 

S0239  UHf  P*fi*J  RflCP                  .  .  . 

PtJ^S  UHF  Adipier  . .  . 

PL259  UHFPhjg   .  -  , ...,., 

\JG2W/V  aNC  Piu^i                 ........ 

llGtC>94/y  aNCBulhtr^d  Ree^     .  .  .   .  - 


.  S2.95 

.  S3.50 

2/1.99 

.  St.7& 

S2B^ 

.  i3.79 
.  «  .40 
,  S1.21 
.  SUM 

.  n.&o 

.  Sl  79 
.  Sl.29 


TRS-80 
16K  Conversion  Kit 

Expand  y^mif  4K  THS-im  Syslem  lo  tfiK 
Kit  comas  complate  with: 

•  Hea  MMS29C  {UP04l6/41t6)  ICK  Dyn.  Ram  (*n;y 

*  E>ocuniafi1alian  lor  con  version 

TltS-16KJ  -tSOns ....... ..*t9,95 

T«St6K3  *200ns 16-95 

TRS.t6K4   'ZSOns 14.35 


KEYBOARDS 


Datanectics  74- Key  Keyboard 

ii-.|fi  EA  20EJ4  ttiip  l,El«:lTDTin;  A'rayal    Si/u:   18'^    L   ■  6^*'  W  H 
I   .'1^  H    WhMo,  pliick.   blue,  grev  hay   capfi.  ijNci  Da[B  Shnoll   — 

Part  No.  KB354 $29.95  ea. 


Micro  Switch  89-Key  Keyboard 

II  .^-ii  A*^l  SiiW2D3$i5K  Chtp.  SLib:  lfr3,'fl"L  X  S'/^'W  X  1^5JB"H  Metil 
i'i';i'T-in.  Lli:;li1  ^  rjgik  on^y  kfi]^  -^a^slNo  Batm  &ha«tf 


Par1No.KB69SD12'2 


S19.95ea. 


Boscherl  Multi-Voltage  Power  Supply 

SVDC.  i3V0C  ama  Z4Vl>C 


M»- 


f  MATURES- Voltigsi'i  5VDC  ^  ^*tnpK  12VDC  i  4iini(H,  4  Z4VDC  a 
4*tnpi    Rpfl    Lp«J;    +  5fV  Hoi   ^I'ft,   + 12  1  2«V  oul   +S%  i»-1»% 

b«4|   Ovfi-P^Jl  t  -a^mi-ttrtr  ptttiaeiiott.  Hi  OT  3WAC  ^FBuri  Wt,  i  KM 

Owwwl  ESHcnpHikin;  Tlw  "BokJivi^"  Piaw  gi,ippdv«n  nninuttv 
4Bflkgi4Kr  Ic  apzi'Cor^Crn  «ri1fi  rTT  A4Tanc4  Ternftiwl  vonirattw  {ATCl 
TtiEi  -own  Ithh*  rvjjo^nQ  »«rw  'St4>P^  pfovirivs  us«r  Mllh  nign  CuT' 
f*ni  fmivifttntiFiiM  'Comnton  Jn  usb  wmi  conqjulDT  4|r«li<tki  ||f  oorapact 
•W  pravHJwi.  HrMtMlly  tor  nnuntjrtg  tmo  olocuwHc  •nolc^uies  Eacli 
mapV^f  >«■•  6  llFwlod  faJiJAft«4  ovn  iM  Ifppf  fa  Tnauirtlngi. 
S-jL— '~:=!i—  -rr^ui^nTiSilS  lo  6#  USOD  ^rtfll  ATC  flnc'oeeS 

Part  No.  20O-3Q10  _.........  .$69.95  each 


JE600 

Hexadecimal 
Encoder  Kit 

RILL  i-BIT 
LATCHED  OUTPlfT 
19-K&Y  KEYBOAftD 


THw  JE^Wl  GneodBT  Kvrtxawrd  Kit  faflviOat  tMO  vpsrai:* 

to   tf  lov^   dirwet    prosrarr^niinf  lor  B-tiit  7rikTi(»pro^««»$f 

.■C^ea  for  UWf  apUWkltH  wMl  On«  h«t,]rtt  «  b>|14Ail4 
OviTCruT  «vaiib|ib**-  TH»  Output*  ar»  ISVtHtf  anti  Tnanrtor*;! 
^Jth  9  LED  JMntowtg-  AlKi  includ«ilfs*|L«y  Kflinr  nra^^ 
P^Afursfr'  Full  B"brt  lat<h*d.  OMtS>*zt  lor  micTocrttcMaOf 
k^M.  T?ir«a  uwir-dpsTHW  Jnvi  vrit^  0«m  b«.ine  tMft^to 
OtHTBtfon.  DatiOWW*  Qiro.^  unnrhifld  lot  itft  1i  K«r*. 
B  LED  tefcUfcita  ta  vmf'wfv  btiTw?**.  ^.m^  inixrfBic>ingi  w^hIi 
iu^'>d*r{}    fiK^fp^Ln    IC   ^anftecLor     Only    4-&VOC    ^#i^wlrv(t 

(After  AssBfnofed  ftQQ  4R 


«t  pjgtuf  gd  JftOraJ 


Jg60Q/DTE-HK 

.f  <-rtrt  ly---.  i*  ^'i  Meit»^*c.  KayCAard,         ted  ac 
JcdQQ   Kit    PC  Beam  tCmCrtiJu  I  no  CB4IJ-  .3^03.33 

K  1 9   tH<B¥  KwtKMirtf  it^mgnama  «ftty|  -  , .  .  S  14.95 

DTE-i^K  {M4«ofti¥ -3^"H3A%"wjii«**Di  S44.9^ 


pfSee^  List  Qf  AdveeUsers  o/t  pagv  f14 


73 Magazine  •  JuneJ9d2     161 


DEALER  DIRECTORY 


Phoenix  AZ 

Tha  SfHJthi^est's  most  progressive  cumrrmnica- 
tioiifs  coii]i>jiuy  stfickinj^  KenwtxxJ,  [com, 
VftcsUp  MF],  B6tW^  A^tmn^  LanufEi,  f  liLslu:ra,rt, 
]|y-C^n.  Ifearcat,  and  more,  Wtmid  like  to 
servevniil  PfiwerCoiiiinuiiicatioTisCorp.,  J 640 
Wfsil  Ciimulbddt  H«!,,  Plioenix  hZ  83015, 
241- Watt. 

Culver  City  C  A 

l\xr^^  Kbctnmics.  391B  ^puJvcda  Blvd,,.  Culver 
Cilv  CA  90230.  3E«)-a*K»3.  Trades  4£k3-l8»fiSaij 
Diego.  «27-5733  (Reno  NV) . 

Fontana  CA 

Cbnip]ete  lines  ICOM,  DtriilTOri,  Ten-Tec, 
Mirage,  Cubk:^  Lunar,  over  4000  (?lec:lrfniic 
pruduets  for  hohi>yih.i,  iwhuitiun,  experi- 
menter. Also  CB  ra(iif>>  landmobllei  FftnUllTa 
Electronics,  ^128  Sierra  Ave,  Fuiitaiia  CA 
i»2a35,  *3a-77i0. 

San  Diego  CA 

We  buy  and  5fll  Surplus  Army  IVa\T  Elo(S 
trouiCj  alsta  Terminated  Maltrial,  Wliat  dti  you 
want  to  sclji:'  Write  For  cataloi^ie.  Eketroiilc- 
town,  Inc..  44(K7th  Avenue,  PO  Boi  2048,  San 
PicRO  CA  92112,  232-M79, 


San  Jose  CA 
SAN  FRANCISCO  BAY  AREA 

Homebrewei^'  httveii:  tons  uf  new  apd  usetl 
H  ajm/Coniputer  gear  and  ccimp<:jnent.s,  S<;rvtilg 
Haflis  since  Ift^iK.  Wc  speciakte  in  ICOM, 
KLM,  Mirage,  CoiTiptronLx.  We  ship  nvor^d- 
wide.  Telt^Com  ELectmnies,  15460  UnJun 
AvenuB,  San  Jose  C A  95124.  S77-447Q. 

San  Jose  CA 

Bay  area'^  newest  Amateur  tladio stare.  Nt*vv  fit 
used  Amateur  Rat^io  sa^cs  &  .&ei%'iLt;.  We  feature 
Kenwood,  LCIOM,  AzdL^fi,  Vaesu.  Tcn-Tetv 
Santtw  &  manv  more.  SKaver  Rajdio,  Inc.,  137S 
So.  Basconi  A  ve. ,  San  Jose  CA  95 128,  ^S- 1 103 . 

Smyrna  GA 

For  yoMt  Kenwfttxl,  Yaesu.  ICOM,  Drake  and 
other  amateur  nuedi,  cijiue  to  sw  lis.  Britt's 
Two- Way  Radio,  2506  N,  Atlanta  Hd.,  Sni>nm 
GA  30080,  432-8006. 

Preston  ID 

Boss  %VB7BYZ,  has  rhe  Largest  Stuck  of  Ama^ 
teur  Cf^ar  in  (he  [ntermountain  West  and  tile 
Best  Pricta.  Call  me  for  all  vour  ham  needs. 
Ross  Dktnbvtltig,  78  So.  State,  Fres-ton  ID 
83263,  S52-0830, 


Syracuse-Central  NY 

HAM-BONE  RADIO  (sAVES  m  LOT  OF  1;^$ 
on  all  ItNjm,  Ten-Tec,  Elygain  &  Kantrunics 
Gitar.  Fast,  Dei>endable  Serv^ice  Before  &  Alter 
die  Salef  Servie*-  Ls  Our  Main  Bu^iii^ff^sl  Need 
Cdsh-Hain-Iktne  will  sell  your  gear  for  lOSli 
cofnmusion.  320(3  Erie  Blvd.  E.,  Syracuse 
13214,  446^2266. 

Philadelphia  PA/ 
Camden  NJ 

Wavegiiiide  fit  Coaxial  Micfeiwavt  ConiponenL'i 
&  FquJpment-  Labctratory  Grade  Test  In- 
5trumenU  Power  SuppMe*,,  Buy,  S*-lt  &  Trade 
all  popukr  makes -HP.  GR.  FXB.  ESI.  Sortn 
sen,  Singier,  etc,  Ijectninic  R«a?arich  I^h*,  142,1 
rcrrj'  Ave.,  Cftiiiden  NJ  08104,  MlA2m, 

Amsterdam  NY 
UPSTATE  NEW  YORK 

Kenwciod,  ICOM,  Draltc,  plus  many  other 
lineSj  Anialtmr  Dealer  for  over  35  years.  Adiron- 
dack Radio  Supply.  Inc..  1 85  West  Main  Street. 
Amsterdam  NT  12010,  M2-&i50, 

Syracuse-Eome-Utica  NY 

Featuring;  Kenwood,  Vaseu,  ICOM,  Drakfr^ 
Ten-Tw],  Swan,  Di':nTron,  .\Jpha,  Robot,  MFJ, 
Tempo,  Astmn,  KLM,  H\  Cain,  Mcislev,  Lar- 
sen,  Cuahcraft,  Hitttler/Miiii  Producte.  You 
uon't  be  dUa^>pointed  with  equipment j'servk*. 
Radio  World.  Oneida  Coui^tn'  A irp*)rt- Termi- 
nal Buildint;.  Oriitkanv  K\  13424,  337  0203. 


Columbus  OH 

The  biggeJit  and  best  liain  Store  in  the  rnidwest 
fealurii^g  quality  Kenwood  prodirets  with 
working  displays.  Wc?  sul]  only  the  bpsL 
Authorized  Kenwood  Service.  Univcfsal 
Anmttiir  Radio  Inc,^  1280  Aida  Dr.,  Revnolds- 
buTg  (Columbus)  DH  43068,  !^i-42S7. 


Bend  OR 

Satellite  'f\''.  Known  braiids:  tiall  todfl\  for 
mure  inform atiori  and  inquire  abntit  our  dealer 
pmgrain.  WESPt:RC:OM,  P.O.  IJox  722fJ, 
flena  OR  0770«,  3S0-0996. 


Scranton  PA 

ICOM,  Bird,  CuidiCraft,  Beckman,  f-luke, 
Larsen,  Hustler,  Ankmna  S[7eclaIijtU,  A'itron, 
A%'anit,  Bctd«n,  W2AU/W2VS,  CDE.  Ml\, 
Vjbroplex,  Ham-Kf^v,  CES,  Amplienol,  Sony, 
Fanon/ Courier,  B&W,  Amec^i,  Shuru.  LuRue 
Electronics,  1112  Grand  view  St..  Suranton  FA 
lflJ>09,  ■143-2124. 


Terre  Haute  IN 

Your  ham  headquariuni  ]j:>cated  in  the  htiarl  of 
the  rnidwest.  Utxisier  FJectrontisi,  Ine.^  tQ 
M«adows  Center,  P.O.  Box  3300,  Terre  liaute 
IN  478003,  23SH4S6. 

Littleton  MA 

The  ham  store  ol  N,E.  you  can  rely  on.  Ken- 
wood, ICOM,  Wilson,  Vaea^],  DenTr^ri,  KLM 
amj>s,  B6tW  switches  6c  wattTTietens,  WliLstler 
radfar  detectors,  Beart-iit,  Regency,  antennae  bv 
Larsen,  Wilson,  Hustler.  GAM.  TEL-CORjI 
Inc.  Communication  &  Eksetmnira.  675  Gneat 
Rd.,  Hl  us,  Lttlbtou  MA  U1460.  4Sfi"30^, 

Ann  Arbor  MI 

See  us  for  produete  like  Ten-Ttsi-,  R.  L,  Drake, 
Dentron  and  manv  more,  tjpen  Mundav 
through  Satyrdav,  1^30  to  1730.  WMVC;R 
WBSUXO,  VV  DflOKN  and  W8RP  behind  tiw 
counter,  fureliase  Radio  Supply,  327  E.  Hoover 
Ave.,  Ann  Arbor  MI  4S104.  (508-3696, 

Hudson  NH 

New  England's  Distributctr  and  Authort2*?d  Ser- 
vice Center  for  all  Major  Amateur  Lines.  Titfb 
HodJu  ElectPonics,  Int.,  61  Ltrwell  Rnad.  Hud- 
son JNH  mm\.  &83-5005, 

Somerset  NJ 

New  Jersey's  only  factory^-autharijwxl  ICOM 
and  YAESU  dirfriButor.  Large  inventory  of  ne^% 
and  used  specials.  Most  major  brands  iu  litock. 
Complete  service  and  fatillties.  Radios 
Utiliniited,  1 7fiO  Fusion  Avenue.  P.Oh  Bok347, 
Somerset  NJ  08*173^  4<jOHI509. 


Dallas  TX 

Dealer  in  Used  Computer  Hardware  &:  Elec- 
tronit  Parb^.  Special  on  Daisy  W^heel  Printers. 
Xertffl  Word  Processing  Equipment,  Dual  Card 
Prinfers  and  Displii\-  Systecns.  Catalog  $1.("XI 
Rondure  Company  (The  Computer  Room] 
Dent.  73,  2522  Butkr  St.,  Dallas.  TX  75235, 
63(M62L 

San  Antonio  TX 

Amaietir,  Comrnereial  2-say  S<Hliog  Antenna 
Sptfcialists,  Avanti,  AmIuci,  Bird,  lly-f^ain,  Stan- 
dard, Vibfoplex,  Midland,  Henr\%  CuhhCraiA, 
Dleloetric,  Hustler.  ICOM.  MFJ,  Nye,  Shu  re. 
Cubic,  Tempo,  Ten- Tec  and  other";.  A|)pIiiirioe 
&  Eijuipmcnt  Co.,  Inc.  2317  Vance  jiaeksan 
Road.  San  .\ntanio  TX  78213,  938-3350. 

Vienna  VA 

Tht  Washinj^on  inetropolttaii  area'*  fading 

(iuppSiei  of  the  lattist  in  AmattNir  Radio  and  Test 
Equipint-nt.  On  your  next  trip  to  the  Natign'i 
Capital,  stop  by  and  see  m.  Fiectroiiie  Equip-^ 
ment  Bank  ant-.,  31B  MOl  St,  N.E„  Vimma  VA 
221S0,  S3S-3350. 

DEALERS 

Your  company  name  arid  message 
can  contain  up  to  25  words  for  as  lit- 
tle OJH  $150  yearly  (prepaid),  or  $15 
per  month  (prepaid  quurterhj).  No 
m^mtion  of  mail-order  husine<!S  or 
area  code  permitted.  Directory  text 
and  payment  mtssf  reach  tts  60  days 
in  advance  of  publication.  For  ex- 
ample, advertising  for  the  August 
*S2  issue  must  be  in  our  kanda  by 
June  Isi.  Mail  to  73  Magazine..  Pe- 
terhoTough  NH  03458.  ATTN; 
Nancy  Ciampa, 


1$2     73 Magazine  *  June,  1982 


PROPAG/\TIQN    ] 


J.  H.  Nefson 
4  Plymouth  Dr, 
Whiting  NJ  08759 


EASTERN    UNITED    STATES    TO: 


GMT:    M      0^      M      M 


DH 


ID 


IJ 


14 


16 


IB       30 


22 


ALASKA 


ARGEMTIifiA 


AUSTRALIA 


CANAL  ZON  E 


EfdGLANp 


HAWAII 


IMOlA 


JAPAN 


MEXICO 


PHILIPPINES 


PUERTO  RiCO 


SOUTH  AFRICA 


U.S.  S.  H, 


WEST  COAST 


lA 


n 


2i 


21 


lA 


UA 


14 


M 


U 


N 


21 


M 


N 


MA 


ii 


2} 


}4A 


14A 


7A 


J4 


M 


U 


}4 


M 


M 


T6 


7A 


U 


JA 


J  4A 


14] 


]4 


78 


}4 


14 


UB 


f* 


7Z 


J4 


1 


]4 


IE 


IE 


}4 


7B 


U 


!4 


74 


]4 


14 


m 


[I 


?t5 


M 


7iS 


14 


M 


M 


7B 


M 


f^ 


1 


14 


14 


li 


M 


N 


76 


^4 


21 


!4 


l^A^LA 


2] 


li     2} 


}4A 


14 


lA 


_Z£ 


14 


7B 


i4 


21 


U 


14 


78 


1) 


U 


11 


M 


U 


14 


n 


21 


n 


U 


lAA 


\4 


lA 


lA 


14 


U 


Ilk 


lA 


U 


11 


ZlA 


14k 


11 


21A 


14 


21 


14A 


14 


U 


U 


2) 


14 


rt  1 


u 


14A 


^ 


llA 


MA 


II 


U 


14 


11 


li 


1\ 


14 


2) 


lA 


lA 


21 


CENTRAL    UNITED    STATES    TO 


ALASKA 


AflGENTIFVA 


AUSTRALIA 


CANAL  Zl>NE 


Erie  L  AMD 


HAWAII 


I^DIA 


JAPAN 


MEX4CO 


PHILIPPINES 


PUERTO  RfCO 


SOUTH  AFRICA 


U.  S.S.  R. 


14 


Zt 


21 


21 


H 


14K 


14 


14 


14 


14 


U 


21 


21 


MA 


14K 


\4 


)4 


14 


14 


14 


m 


11 


}4A 


14 


}4 


14 


14 


14 


14 


14 


7B 


11 


14 


14 


14 


73 


}4 


14 


HB 


14 


}4 


Ik 


7B 


76 


7B 


\4 


m 


m 


m 


MB 


M 


14 


m 


m 


m 


14 


21 


14 


14 


}4 


Ip 


7B 


14 


7B 


14 


14 


U 


lA 


21 


7S 


?J 


)4 


M 


II 


14 


14 


UA 


14 


1± 
21 


7S 


M 


14 


U 


14 


14 


lA 


21A 


14 


n 


14 


JA 


14 


11 


\4 


21      1\ 


14      14 


11 


la 


lAA. 


11 


lA 


14 


11 


14 


21 


21 


1  WESTERN    UNITED    STATES    TO: 

j    ALASKA 

14 

M 

14 

7 A 

; 

7 

7 

7 

m' 

N 

M 

14 

AflGENTIPIA 

tl 

21 

N\ 

U 

14 

7 

M 

?I 

21 

n 

VA 

VA 

AUSTRALIA 

t}K 

£M 

V 

UA 

14A 

U 

M 

t 

71^ 

7fi 

J4A 

?1 

CANAL  ZONE 

2} 

MA 

14 

M 

14 

7 

7 

M 

M 

f} 

?] 

?! 

EhlOLAMD 

14 

7 

7 

7 

7 

1 

7 

MB 

M 

M 

14 

14 

HAWAII 

21A 

21A 

£f 

MA 

M 

14 

f4 

M 

M 

J4A 

2J 

?I 

INDIA 

14 

M 

M 

M 

76 

76 

7E 

7B 

M 

14 

14 

M 

JAPAN 

U 

M 

14 

14 

U 

Mti 

7 

7 

J  4 

)4 

M 

M 

M£?(lCa 

14 

14 

}4 

U 

7 

7 

7 

M 

U 

M 

V 

n 

MA 

PHILIPPINES 

}4A 

U 

M 

M 

MB 

MB 

7§ 

7B 

M 

M 

14 

PUERTO  RICO 

11 

MA 

N 

J4 

7 

1 

M 

\4 

M 

\4A 

?} 

?\ 

SOUTH  AFRICA 

}4 

76 

7E 

7E 

7^ 

W 

M6 

\4 

M 

M 

M 

14 

U.  S.  S   R. 

14 

7A 

7 

7    : 

7 

7 

7 

7E 

M 

M 

M 

M 

CAST  COAST 

i4A 

14 

14 

7A 

7 

7 

7 

lA 

H 

HA. 

\4A 

21 

First  letter  =  day  waves  Second  ==  night  waves 
A  =  Next  higher  frequency  may  also  be  useful 
B  =  Difficult  circuit  this  period  F  =  Fair  G  =  Good 
P  =  Poor  *   =  Chance  of  solar  flares;  «   =   of  aurora 


SUN 


MON 


TUE 


JUNE 

WED  THU 


FRI 


SAT 


1 

G/F 

2 

G/F 

3 

G/G 

4 

G/G 

5 

G/Q 

6 

G/G 

13 

G/G 

7 

G/F 

8 

G/G 

9 

G/G 

10 

G/G 

n 

G/G 

12 

G/G 

14" 

G/G 

15      16 

G/G*       F/F* 

17 

F/P 

18 

F/F 

19 

G/G 

20" 

G/G 

21  " 

G/G 

22     23 

G/F         G/G 

24 

G/G 

25 

G/F 

26 

G/G 

27 

G/G 

28 

G/F 

29     30 

G/G         G/G 

Reader  Service  for  facing  page  t^63-^ 


I 


QUITE  A  SIGHT! 

(AND  EASY  TO  SEE,  TOO!!) 


Sporting  an  all-new  Liquid  Crystat  Display,  the  FT-230R  is  Yaesus  high-pertomnance  answer  to 
your  call  for  a  very  affordable  2  meter  mobile  rig  with  an  easy-to-read  frequency  display! 
The  FT-230R  combines  microprocessor  convenience,  a  sensitive  receiver  a  powerful  yet  clean 
transmitter  strip,  and  the  new  dimension  of  LCD  frequency  readout.  See  your  Authorized  Yaesu 
Dealer  today  —  and  go  home  with  your  new  FT-230R! 


.  i    J 


^  fiihp**  m 

C. 

m 

^kL               ^ 

nPT 

DfJ  Affl 


Hvav 


at 


^lJ*  »»''*"' 


tfOL^%h 


&tiiL 


s^mat^m  T.  &*»•■- 


VAESU 


MtlW*OF»^ 


U^   FWt 


T^lANB 


C^f^CH 


SALE  SUBJECT 
RX  CeSTlFlCATFON 


LCD  five-digit  frequency  readout  wilti  night 
light  for  high  visibility  day  or  night 

Two  VFOs  for  quick  QSY  across  the  band. 

Ten  memory  slots  for  storage  and  recall  of 
favorite  channela 

Selectable  synthesizer  steps  (5  kHz  orlO  kHz) 
in  dial  or  scanning  mode. 

Priority  channel  for  checking  a  favorite 
frequency  for  activity  while  monitoring  another. 

Unique  VFO/Memory  Split  mode  for  covering 
unusual  repeater  splits. 

Up/ Down  band  scan  plus  memory  scan  for 
busy  or  clear  channel.  Scanning  microphone 
included  in  purchase  price- 


Futf  25  watts  of  RF  power  output  from 
extremely  compact  package. 

Built-in  automatic  or  manual  tone  bufst- 

Optlonal  synthesized  CTCSS  Encode  and 
Encode/Decode  boards  avaif^bfe; 

Lithium  memory  backup  battery  with  estimated 
lifetime  of  five  years. 

Optional  YM-49  Speaker/Microphone  and 
YM-50  DTMF  Encoding  Microphone  provide 
maximum  operating  versatility- 


FT-2QeR 
FM  Handheld 
2  iietem 


FT-708R 

FM  Handheld 

70  cm 


14 

And  don't  forget!  Yaesu  has  a  complete  tine 
of  VHF  and  UHF  handheld  and  battery 
portable  transceivers  using  LCD  display!!! 


FT-290R '  2  Meters 
SSB/CW/FM  Portable 

FT-690R  -  6  Meters 
USB/CW/AM/FM  Portable 


w 


Price  and  Specifications  Subject  To 
Change  Without  Notice  or  Obiigation 


The  radlf^ 


TAIUj 


482 


YAESU  ELECTRONICS  CORP.  6851  Walthall  Way,  Paramount,  CA  90723  • 
Eastern  Service  Ctr..  9812  Princeton-Glendale  Rd.,  Cincinnati,  OH  45246  • 


(213)  633-4007 
(513)  874-3100 


PQfWiM 


fvu  mm    Mil 


■  III 


f^KErvwaop 


HMD     MITQ     HOC      luH 


A*i  VPCk/MIHO  Mm           MR 

i 

^^H       .^^H        ^^m        ^^M 

1 

^^Hft          ^^^H 

FUNCTia^l 


MEMOKV  CH 


HF  ATI 


HB.  LEVEL 


H-ftA  hfMCd%#en 


■ff^ —    wi^T^n 

TS-9304 

w 


iU. 


«HW. 


wrrFB 


tiiC-9^CJUi 


n 


1[**^ 


DO-WNj 


-^ 

«F         ^ 

cu*n 

MOTCH 

JlftVllfe         BLOCK 

, 

^1 

^         ^          ^^^^1 

■^^^B 

AF-S-HF 

1 

■a  Ks  ^H 
n  nn  ^H 

—  CWWIT                  " 

^^T'^M^^^Tm                     Iff 

1^'  '^^HK\       B^               lE'l 

Off  TUNI 


FITCH -©-AfTlrtll 
V  1    r 


Superior  dynamic  range,  auto,  antenna  tuner, 
QSK,  dual  NB,  2  VFO's,  general  coverage  receiver. 


The  TS-S30S  is  a  fiuperlatlTe*  high  per- 
formance* all -solid  state,  HF  transceiver 
keyed  to  the  exacting  requirements  of  the 
DX  and  contest  operator.  It  covers  all 
Amateur  bands  from  160  through  10 
meters,  and  incorporates  a  150  kHz  to 
30  MHz  general  coverage  receiver  having 
an  excellent  dynamic  range. 
Among  its  other  important  features  arep 
SSB  slope  tuning.  CW  VBT,  IF  notch  filter, 
CW  pitch  control,  dual  digital  VFO's,  CW 
full  break -in,  automatic  antenna  ttmer, 
and  a  higher  voltage  operated  solid  state 
final  amplifier.  It  Is  available  with  or 
without  the  AT'930  automatic  antenna 
tuner  built-in. 
TSbauS  FEATLTRES: 

*  16O-10  Meters,  with  150  MIz  *  30  MHz 
general  coverage  receiver. 

Covers  alt  Amateur  frequrnries  from  160-10 
meters.  Including  new  WAKC,  30. 17,  and 
12  meter  bands,  on  SSB.  CW,  FSK,  and  AM, 
Features  150  kHx  -  30  MH2  general  cover- 
age receiver.  Separate  Amateur  band 
access  keys  allow  speedy  band  selection, 
UP/ DOWN  bands  witch  changes  In  l-MHz 
Steps.  A  new,  innovative,  quadruple  con- 
version, digital  PLL  synthesized  circuit 
'provides  superior  frequency  accuracy  and 
stability,  plus  greatly  enhanced  selectivity. 

*  EzceUent  receiver  dyiuunic  rangen. 
Receiver  rw^o-ione  dynamic  range,  100  dB 
typical  (20  meters,  500  Hz  CW  bandwidth, 
at  sensiUviiy  of  0.25  fiv,  S/N  10  dB), 
provides  the  uttlmale  in  rejection  of 

IM  distortion. 

*  All  solid  state,  28  volt  operated 
final  amplifier. 

The  final  atnpUfler  operates  on  28  VDC  for 
lowest  IM  distortion.  Power  input  rated  at 
250  W  on  SSB.  CW.  and  FSK,  and  at 
80  W  on  AM.  Final  amplifier  protection 
drcuil  wtth  cooling  fan.  SA^'K  Power 
raeier  built-in. 

*  Automatic  antenna  tuner,  bulll-ln. 
Available  with  AT-930  antenna  tuner  built- 
in,  or  as  an  option.  Covers  Amateur  bands 
80-10  meters,  including  the  new  WARC 
bands.  Tuning  range  automatically 


preselected  wtth  band  selection  to  mini- 
mize tuning  time.  rAUTO-THRU*  switch  on 

front  paneL 

QW  fuU  break-in. 

CW  full  break-in  circuit  uses  CMOS  logic  IC 

plus  reed  relay  for  maximum  ncxlbillty, 

coupled  with  smoolit.  quiet  operation* 

Sv^ltchable  to  semi-brcak-ln. 

Dual  digital  VFO*s. 

10-Hz  step  dual  digital  VFO*s  include  band 

Information.  Each  VFO  tunes  continuously 

from  band  to  band.  A  large,  hea%'y*  flywheel 


t>^pe  knob  is  used  for  improved  tuning  ease.  Other  features^ 


*  Fluorescent  lube  digital  display. 

Fluorescent  lube  digital  display  has  analog 
type  sub-scale  with  20-kHK  steps*  Separate 
2  digit  display  Indicates  RIT  frequency  shift. 

*  RF  speech  processor* 

RF  clipper  type  processor  provides  higher 
avenagc  'tiilkpowerr  plus  improved  intelli- 
gibility. Separate  "IN"  and  "OUT"  front 
panellevel  controls. 

*  One  year  warranty* 
The  TS'930S  carries  a  one  year  Hmited 
warranty  on  parts  and  labor. 


T.F.  Set  switch  allows  fast  transmit 
frequency  setting  for  split-frequency  opera- 
tions. A-^B  switch  for  equalizing  one  VFO 
frequency  to  the  other.  VFO  "Lock**  switch 
provided.  RIT  control  for  ±9.9  kHz  receive 
frequency  shift 
Eight  memory  channels. 
Stores  both  frequency  and  band  Informa- 
tion. VFO'MEMO  switch  allows  use  of  each 
memory  as  an  independent  VFO»  (the 


•  SSB  monitor  circuit.  3  step  RF  atlcnuator, 
VOX.  and  lOO-kHz  marker. 

Optional  accessories: 

•  AT-930  automatic  antenna  tuner 

•  SP-930  external  speaker  with  selectable  , 
audio  niters.                                                    ^tf 

•  YG^55C  1  1500  Hz)  or  YG-I55CN-1  (250  h3^ 
plug-in  CW  fitters  for  455-kHz  IF, 

■  ^T<  88C4  i500  H7j  CW  plug-in  filter  for  j 

8.83-MHz  IF.  f 


original  memory  frequency  can  be  recalled   •  YK-88A4  (6  kHz)  AM  plug-In  filter  for 


at  will),  or  as  a  fixed  frequency.  Internal 
Battery  memory  back-up,  estimated  1  year 
life.  (Batteries  not  Kenwood  supplied). 

Dual  mode  noise  blanker  ["puJse** 
or  *woodpe  c  k  e  r")  * 


8,83-MHz  IR 

MC-60  [S-8)  deluxe  desk  microphone  with 

UP/DOWN  switch. 

TL-922A  linear  amplifier 

SM~220  station  monitor 


NB-1,  with  tlTreshoid  eontroL  for  pulse-type    •  HC-10  digital  world  clock, 
noise.  NB-2  for  longer  duration 
'woodpecker'  type  noise. 

*  SSB  IF  slope  tuning. 
Allows  independent  adjusiment  of  the  low 
and/or  high  frequency  slopes  of  the  IF 
passband.  for  best  inierferencc  rejection. 

*  CW  VBT  and  pitch  controls. 
CW  VBT  (Variable  Bandwidth  Tuning) 
control  tunes  out  interfering  signals.  CW 
pitch  controls  shifts  IF  passbarid  cmd  simul 
tan  CO  u  sly  changes  the  pitch  of  the  beat 
frequency.  A  "Narrow/Wide"  filter 
selector  switch  Is  provided. 

'^  IF  notch  filter. 
lOO-kH/,  IF  notch  circuit  gives  deep. 
sharp,  notch,  better  than  -40  dB. 

*  Audio  filter  built-in. 

Tuneable,  peak-type  audio  filter  for  CW. 

*  AC  power  supply  built-in. 

120.  220.  or  240  VAC.  switch  selected 
(opertiles  on  AC  onlyj* 


•  HS  6.  HS  5.  HS-4  headphones. 

More  information  on  the  TS-930S  is 
available  from  all  authorized  deaksrs  of 
Trio-Kenwood  Communications 

nil  West  Walnut  street, 
Compton,  California  90220 

^KENXAASOD 


«! 


.p&t§a€iUr  tn  aau^leur  radut 


Speri/lratitiRs  and  prices  are 
subieei  so  change  without  notice  t>r  obHgation.