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1978 August : :~~. Ir EOITOM'U8USHER W......G_m NS\ll. EnClIT1V£ VICE PRESIDENT -..,.~ .o.sslS TAtlU .>M.'~D.OoTrI,tOl'n", E. $m;'~ ._- PIlO Dl,IC:TIOfl .....N...lJEA l,...P_...._F'._ -- MTlIE..... IIT..ENT eraog_ -~ -- -_. c.1.IK• ..,., -~ _R$ol· WllI' ...... PRlNnllG Go.., S' oonl>e
SLEP mail-order specials A''' '''': ......, MOR$l .......nc wm. ' An A( ·II'OWl ~ 5U'f'\' ISOP'OU ' "~''' IlASf \ 1 ..110'< ....1£...... rsoI'Ol.IUO ...... eAr.fS ' ..' I(l<strong>to</strong>J( ..... ....M l.CT.-' ...... "'JW lANCI I'llOCI...... 110","0 " ·7 ' 100 ....'NOlO;> lIlA.""'1 ,._, 11 00 _'AO.TE-...rv-r.M>o .'OO',..... _Z1'OO .. .. 1l """"UN'.:O:'W'''O-'OM Cl.->• •.-..oIl CO'oTllOlUO ""'''...... '''''15 ..'15 49'1'; .. .. 2~USQI TI 10900 ........." SSQ ITI 1"00 ''''l TWlSTlll ltl SQ ' TI Ill oo \ '''''·'0''''''''''' DunlOW'_ ... ..STSl CTION fOR KA.M" 'All TwI STtI ICONOUOC....OTOllC.. 'IlE,".n JO "'00 M oo SWITCH '''00 woOlal ,w oo 1l
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Ii Gift to , enty Years of 73 o 174
Page 3 and 4:
Rack Attack from DenTron Components
Page 5 and 6:
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
Page 68 and 69:
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
Page 82 and 83:
73 Magazine Staff Field Strength fo
Page 84 and 85:
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
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• CALL 1 N8AD 2 KB8/>J'1 l WAlDCS
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• •• 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 172 and 173: 1975 August 1: ~ '3~fr EOi TORJI'\.
Page 174 and 175: ~ ~ >. :; ....., co t" O) , f "i'
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
Page 223 and 224: QRP ARCI ANNUAL OCTOB ER QSO PARTY
Page 225 and 226: ("----~) FUNl from page 28 5) The "
Page 227 and 228:
you need a friend w ho works fo r M
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held, and the Georgia State CW Asso
Page 231 and 232:
FREE! RADIO AMATEURS WORLD ATLAS wi
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DireCiional RF Wallmeler Dielectric
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control of an amateur radio station
Page 237 and 238:
SatelliteT~ FORTHE HOME Sick of Net
Page 239 and 240:
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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