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1975 August 1: ~ '3~fr EOi TORJI'\.I81ISHER W~ne Glee" W2NSD/1 BUSINESS MANAGER V i '&i n i ~ Lond.,., Green EDITORS [ rit K . Albr" ht K8I3FH/ I AI.. S. ", i, k. WB4RVH loon Bur",, !! EDITOR' ''L ASSISTANT Suun G. Plodbri(k PRODUCTIONMA"-"GER l ynn P_ ;..r. F,...... ART DEPARTMENT Bob Or,w N.lrq [ , Ue Nc, 1 K. ndel Pori M.>ho,,"y Bob Sawyer PRINTE/!. Biff M. honey PHOTOG RAPH Y Bill H.ydol pll tyPESfTT lNG a.~. LOll' A DV ERTI SING Bdl Ed.....' ". W86BE DI1 N"-""YOuff COMPTROlLER Knud E. 1'.1. Kell lI'I KV4GG/ 1 MAR K ETI NG O..jd H. Lodge CI RCULA TI ON ~b;o ,. Block S"", n Ch.ondlet Doro thy Gibson J...dy How y Cheryl Hurd l'l:orl W ev MifF ~c... lhy INVENTO RY CONTROL "' ..."'> 1~mo nd PLANT MAI NTENANCE Bill Sorry [I,i"" Mercie' ASSOCIAT ES Robert S. ke, WAISCX x hlev Co~ WB9LHO Tom OiBi_ Wll!KZD Terry Fo . WB4JFr W .s..n~ G
STEP UP TOTELREX Professionally Engineered Antenna Systems ~ "MONARCH" 10, 15, 20 Meter "Tri·Band" ~ Model TB5EM!4KWP ~ . 73 THANKS TELREX AND CLEGG ADVERTISERS IN 1960, ADVERTISERS IN I980! THe Famous CLecc TWinS By t h e on l y t est t ha t mea n s an y thi n g ... o n t h e air com pa riso n ... t his array co n tinues t o outperfor m all com petition .. . and h as f or t h r ee de cades. H er e's w h y ••. 'ret rex u ses a u nique trap design em plo y in g 2 0 H iQ 7 500 V ceramic conden sers per anten na. T el rex u ses 3 optimum-spaced , o ptim u m -t u ned r eflec t or s t o provide m aximum gai n an d t rue FI B Tri-Band perfo rmance. • cr., , {r ·~ . -l:' _ .. !' O N L Y TEL R E X G IVES Y OU ALL T H ES E F EATU RES ... - W in d sur vival is 10 0 mph. • 4 KWP po we r r atin g ra in o r sh ine. · Patent ed boxed co axial " Balun". · H eavy -du t y st eel gu sset m ounting pla t e an d st r aps. · 2 " 0 . 0 . reinf orce d al uminum b oo m. · La r ge diamet er, rei n f or ced, ta per swa ged dural element s f o r min i m u m we i gh t and exceptional stren gt h ! • Stainl ess stee l ele ct ri cal ha rd war e. • Phon e an d c w cacaonttv al l bands! A Telrex"Balun" fed "Inverted-Vee" kit is the ideal hi-performance inexpensive and practical to installiow-frequencvmono or multiple band, 52 ohm antenna system. Better t ha n o p t im u m ful l sized Dipole per f or m an ce I n an an t en na which can be set up w it h in the h ou r" n eed in g a m ini ma l supp or t st r uc t ure. (ex Istin g tower , h o u se tree etc. ) The "Inver t ed- V ee" produces a l o w- an gle " Bal an ced " Omn i- D irecti o nal pa ttern, wh ic h in cr eases the sig nal to noise, an d si gnal t o inte rfera nc e ratios. Complet e sim plified in stru ct i o n s ar e provided. NO TUNERS NEEDED! MARK·3 144-148 MHz· 15 Watts $205 FM·76 220-225 MHz 10 watts 1195 For 2 merers &220mHz 12 channel operation at unbelievable price-plus the performan ce & reliability you have learned to expect from Clegg. special quantity pricing Is available on both models. Get your group together & call 1·8(J(). 233-0250 fOr a Quote on your requirements. "MARK·3 can be supplied wit h special modification for CAPor MARS! Call or wrtte today for descriptive brochure. L t 1911 Old Homestead Lane /Ikl/fc,m,""nsc." Greenf ield Industrial Park East Lancaster, PA17601 .... 13 (717) 299·7221 Spe cia l N -type coa x ial co nn ectors, solid r o d ele ments (d ri ven t hru t he b oom). t inne d co n necting lu gs, and sis electrical hardw ar e p r o vide you with p eace of m ind for m any y ears! :t:TI:;---;;i: T £f; :~/ . L I / . ~....._""" If top 2 Me t er perform anc e is y o ur req uir e me n t , t he 2 M VS81 4 k it consisting of 2 ea. ph ased 2 M et er " Bal u n " fed p recision t uned 8 elemen t A rrays o u t perfor m eve n Qu ad st ack ed antennas of other ma k es. F or t echnical data and prices o n t he co m plet e 'ret-e x line, write for Catalog P L-8 P.o. 80x 87 9 - As bury Park, N .J. 07712 Communication AntennasSince 1921 --telrex' LABORATORIES Phone 201 -77 5 -7252 "Reader Service-see page 274 73 Maga zine . October,1980 173
Page 1 and 2:
Ii Gift to , enty Years of 73 o 174
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Rack Attack from DenTron Components
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Escape from Mt. St. Hel e ns! .....
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Small wonder. TRIO-KENWOOD COMMUNIC
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Afresh idea! Our new cro p of to ne
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All new, all nine hf bands and only
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1. SENSITIVITY: Superb amp lif ier
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Touch-Tone Decoders . SJ.' ·_ M·
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WHEN OUR CUSTOMERSTALK•.• WE LI
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STOP RF SPILLOVEI You may be losing
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( LEAKY LINES Dave Mann K2AGZ 3 Dan
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73's ICOM IC·720 DEAR OM: There ar
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MEMORY KEYER BREAK THROUGHI New l
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INTIMIDATED BY MORSECODE? THE NEWAE
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Solid-State H.F. Kilowatt Amplifier
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Escape from Mt. St. Helens! M arian
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dwarfed everything by its magnitu d
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Edward t. M ulvin WBQI FF 34()()54t
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Phot o E. The AB C " That's Incredi
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W erner M . Ma urer W1QMS Kefl y Dr
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MEMORY KEYER BREAKTHROUGHI The rema
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-WILSON SYSTEMS, INC.---.... the SY
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WILSON SYSTEMS TOWERS !i ~ ' ''0.0
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Joseph D. Novak K40VK 2420 Luckett
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Antenna azimuth for ATS·3 from Was
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---SCR1000VHF-SCR4000UHF---- 7i?
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Joe wesrennaver W4FE:. C 155 Wood f
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f MEMORY KEYER BREAKTHROUGHl The re
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The Arcane Art of ATV the transvert
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Th e 2N2219 t ra nsistor specif ied
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Photo E. l eff WB8 RIY, about 5 mil
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Pho to G. Rack-mount installat io n
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Robert B. Grove WA 4 PYQ Grove Ente
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proveme nt over the origina l To uc
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channe l l ; ente r 139.1 MHz into
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detector. Be sure receiver is sw it
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Joseph H. Cowen WA 5TUM P.O. Box 76
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an advance piece and aft erthe-fac
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School and ret ired surgeon Dr. N i
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73 Magazine Staff Field Strength fo
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Photo B. Front of th e con verted Y
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TE1: ANTENNA SYSTEMS l-BoO-654 -}2}
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Robe rt M . Brown W9HBF 561 1 M idd
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c o u ra g i n g a n d wo r th repo
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elay (I used a 3PDT type) . When th
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'" '" 117 VAC NEON DIAL LITE .l 117
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Fig. 9. This view sho ws how the ra
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~ ''' ' '' '' '' -- sli de the cap
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"' 0." -t ee' I CONNECTOR~ TO IlR M
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1'::1" ~~4 ""ATTENTION MOBILE HAMS
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Patrick M cGuire W BSHGR 102 Dunca
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SECURE THIS END TO BOT TO M PL ATE
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Then buy a small can of red spray e
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Description a) Print frame (same as
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MEMORY KEYER BREAKTHROUGHI The rema
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INTIMIDATED BY MORSE CODE? THE NEW
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RTTY Demodulators ~~;~~ e $449. 00
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BUU Directlromthe Tri·EK@ Factoru
Page 121 and 122: • CALL 1 N8AD 2 KB8/>J'1 l WAlDCS
Page 123 and 124: • •• Computerize your log boo
Page 125 and 126: is sim p lif ied and refined t o al
Page 127 and 128: upts but often gets in the last wor
Page 129 and 130: signals. It decides tra nsm itter o
Page 131 and 132: .... Reader SelVice- see page 274 7
Page 133 and 134: IIEW IIIFFEIEIiT FROM BARKER & WILL
Page 135 and 136: Have you ever wondered why the best
Page 137 and 138: P ~ESCA l£ I NPUT C2 C1 I~ ;;-----
Page 139 and 140: A 40-pin socket must be used for th
Page 141 and 142: un til it changed tone and wo und d
Page 143 and 144: MF.J 941C Versa Tuner II , i i 11f!
Page 145 and 146: Two fuses are incl uded fo r safe t
Page 147 and 148: pu shed for th e switch to SSB and
Page 149 and 150: October 1960 .. .....de W2NSD PI ,a
Page 152 and 153: A M ATEUR RADIO 73 6' YIO carRad¥
Page 154 and 155: 73 1964 January INCENTIVE LICENSING
Page 156 and 157: John W . CampbeJl W2ZCU How To Be A
Page 158 and 159: would simply melt the m selves in
Page 160 and 161: 73 1966 Oc tober de W2NSD/l de W 2N
Page 162 and 163: 162 73 Magazine . Oct ober, 1980 19
Page 164 and 165: 1969 October ...de W2NSD/l rr ay ne
Page 166 and 167: 1971 Decem ber Mean ingf ul Conu cu
Page 168 and 169: Jean Shepherd K20 RS Some Guys Make
Page 170 and 171: 1973 July .......····n~ 73's HA
Page 174 and 175: ~ ~ >. :; ....., co t" O) , f "i'
Page 176 and 177: 1978 August : :~~. Ir EOITOM'U8USHE
Page 178 and 179: 1979 March ( UJoTOM'V 8USHEII W. ..
Page 180 and 181: manage o n 4o-mete r phone for the
Page 182 and 183: Fig. 3. Basic patte rn developed fr
Page 184 and 185: of-contac t are three: New England,
Page 186 and 187: 32 ' I " 3 2 '" 3 2 ' . " 3 2 ' I "
Page 188 and 189: Gilding the Lily - FT-101 mod for c
Page 190 and 191: Mike Mods for the KDK-2016A - impro
Page 192 and 193: Clock Blocks a compendium of TTL an
Page 194 and 195: ea BOOK CIIlOS I"lV ERT ER "0001 "
Page 196 and 197: 73 Magazine Staff Build a Better Ba
Page 198 and 199: TUfTS Electronic Department Store,.
Page 200 and 201: TUfTS Electronic Department Stor~"T
Page 206 and 207: TUfTS Electronic Department Stor~.T
Page 208: TUfTS Electronic Department Store,.
Page 211 and 212: t.a IO,. H r "001 ,j- ± " ~ cs r u
Page 213 and 214: and 5. The purpose of the divide-by
Page 215 and 216: 3500. To do this division by 3500,
Page 217 and 218: l i mi t er o utput on p i n twe lv
Page 219 and 220: Radio Amateurs! Tempo Handh
Page 221 and 222: 79. Late in 1975, as the JARL looke
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QRP ARCI ANNUAL OCTOB ER QSO PARTY
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("----~) FUNl from page 28 5) The "
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you need a friend w ho works fo r M
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held, and the Georgia State CW Asso
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FREE! RADIO AMATEURS WORLD ATLAS wi
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DireCiional RF Wallmeler Dielectric
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control of an amateur radio station
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SatelliteT~ FORTHE HOME Sick of Net
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schematics, formulas, construction
Page 241 and 242:
Th e Comm issio n s tated , " Lo ok
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MFJ RECEIVER ANTENNA TUNER/PREAMPLI
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c lasses are proving that it is pos
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74l SIllITTL IUSooN l4lS0 2N " l50'
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NO BULL SHi", • Over the past thi
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7294 N .W. 54 STREET MIAMi. FLORIDA
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• linear Converters for SS B, CW,
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L.. ....J ...... 28 22 North 32nd S
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ATTENTION IC·2AOWNERS: IC-2ATONE D
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smsat !!!ill. CP'O -.4,,...a_ " N '
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BLAK-RAY Ultraviolet Intensity Mete
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PROUDLY PRESENTS the GLOBAL SPECIAL
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TOLL FREE # (800) 528·0180 (for or
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MICROWAVE COMPONENTS COMPUTER I.C.
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• NOV ICE STUDY GUIDE-SG7357-Here
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= = === = TEST E QUIPMENT =====:::;
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EALER PROPAGATION San Jose CA Bay a
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