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f MEMORY KEYER BREAKTHROUGHl The remarkab le AEA Morsematic memory keyer has 35 fantastic features including two AEA designed microcomputers, up to 2,000 character memory, automatic serial number, beacon mode, and automatic morse trainer mode . CALL TODAY La Rue Electronics 1112 GRANDVIEWSTREET SCRANTON, PA. 18509 - Ph. I?1?) 343-2124 AEA Brings you the Breakthrough! nic ely. Th en 1/19 mi ght not lock , but 1/20, 1/21, etc. , m ight lock w ell. Som e f actor s lock with poor sta bil ity. If t he fa ctor you w ant doesn't lock we ll, tr y a slight ly d iff eren t value of C1. D ivision factors grea ter th an abo ut 1/30 becom e fa irly critical to set and aren't very practical. O nehalf thro ugh 1/10 are easy, and very sta ble operat ion ca n be obtai ned . After a division f actor has been selected, rem ove the pow er, wai t a fe w seconds, then turn it ba ck o n. Readj ust Rl until it always sta rts o sc illation on the desired frequency . Th is is more critica l at larger division facto rs (lower fre quencie s). There is a little d rift in th e f irst 30 seco nds the oscill ator is on. (Thi s is minimal at sm all divisio n factors such as 1/10 .) What ca n this ci rcuit be used for? Use your ima gination . Let's say yo u wa nt a 100D-kHz reference, and in H.F. Transceiver Bonanza YAESU FT-101ZD (With New WARe B ands) 'I'"'''''''''''' '''''''''''1/", ft'''' I U u u ' " " . " , ;...." " " , ,,,,,,: ' H . " ""," ' " ",,, ,,\\'1 , ,,,,,,,,,,..,,, ..'''''I " " .. , ,,,,,,, 11 11 u,,, , List Price "flln,,,,, $942.00~~~_....,._ ""'''il iff yo ur [un k box is an o ld 4D-meter, 7-MHz ro ck. Set up t he circui t wi th Cl at 1000 pF and set Rl for div ide-by-7, and presto, there is a 1000-k Hz cryst al oscillator. The l l-MHz crysta l is set up to d ivi de by 110 (Cl at 6700 pF) and makes a nice 100-kH z reference rich in harm onics. I w ou ld be in tere sted to hear of app licati o ns that others mi ght f ind fo r thi s circuit, and of any new devel opme nts in the circu it. A lso , if an yon e k no w s w her e this ty pe of osc illator is covered in any literatur e, . I w ou ld apprec iate hearin g about it. A not e: Be caref ul; sometimes the ci rcuit can be m ad e to lock o n unusual div ision fa ct ors suc h as 1/3.5! O pe rat io n in thi s case is unreliabl e. Al though it w ill wo rk, thi s is not a part ic u larly good circuit fo r funda me ntal frequency oscil latio n.• (Add $15.0 0 Shippi ng & H an d li ng U. S. A . C ont ine n ta l 48 States) I Supply Limited I * 160·80·40·30* ·20-17 * ·15·12 * -10 meter coverage. (*Proposed WARC Bands ). *Built-in A.C. Power Supply. * Variable Receive I.F Bandwidth. * 6146B Final Amp. Tubes. * Built·in VOX, NB & R,F. Speech * Digital plus Analog Freq . Display Proc essor. * 180 Watts D.C, Input Optional Acessories: 600 Hz CW Fil ter· $40 .00,350 Hz. CW Filter · $45.00, Cooling Fan - $20.00, FV -l 0Z Remote V FO · $157.00 58 73 Magazine· Oc tober, 1980
COpy .. ...on inexpensive paper too. Our latest addition, the MICROLOG companion printer for the ATR-6800, plugs in directly for easy 'hard copy' ofyour QSO's, messages, programs, etc. When the tape interface isn't enough, our printer is ready on keyboard command. Complete system for CW/RTIY: ATR-6800, video and printer $2,445, without printer $1995, printer alone $495. We're always up to something new here at MICROLOG CORPORATION, 4 Professional Drive, Suite 119, Gaithersburg, Maryland 20760. Telephone (301) 948-5307. MICROLOG Innovators in Digital Communications v" 51 ""Reader Service-see page 274 73 Magaz ine. October, 1980 59
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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! .....
Page 7 and 8: Small wonder. TRIO-KENWOOD COMMUNIC
Page 11 and 12: Afresh idea! Our new cro p of to ne
Page 13 and 14: All new, all nine hf bands and only
Page 15 and 16: 1. SENSITIVITY: Superb amp lif ier
Page 17 and 18: Touch-Tone Decoders . SJ.' ·_ M·
Page 19 and 20: WHEN OUR CUSTOMERSTALK•.• WE LI
Page 21 and 22: STOP RF SPILLOVEI You may be losing
Page 23 and 24: ( LEAKY LINES Dave Mann K2AGZ 3 Dan
Page 25 and 26: 73's ICOM IC·720 DEAR OM: There ar
Page 27 and 28: MEMORY KEYER BREAK THROUGHI New l
Page 29 and 30: INTIMIDATED BY MORSECODE? THE NEWAE
Page 31 and 32: Solid-State H.F. Kilowatt Amplifier
Page 34 and 35: Escape from Mt. St. Helens! M arian
Page 36 and 37: dwarfed everything by its magnitu d
Page 38 and 39: Edward t. M ulvin WBQI FF 34()()54t
Page 40 and 41: Phot o E. The AB C " That's Incredi
Page 42 and 43: W erner M . Ma urer W1QMS Kefl y Dr
Page 44 and 45: MEMORY KEYER BREAKTHROUGHI The rema
Page 46 and 47: -WILSON SYSTEMS, INC.---.... the SY
Page 48 and 49: WILSON SYSTEMS TOWERS !i ~ ' ''0.0
Page 50 and 51: Joseph D. Novak K40VK 2420 Luckett
Page 52 and 53: Antenna azimuth for ATS·3 from Was
Page 54 and 55: ---SCR1000VHF-SCR4000UHF---- 7i?
Page 56 and 57: Joe wesrennaver W4FE:. C 155 Wood f
Page 60 and 61: The Arcane Art of ATV the transvert
Page 62 and 63: Th e 2N2219 t ra nsistor specif ied
Page 64 and 65: Photo E. l eff WB8 RIY, about 5 mil
Page 66 and 67: Pho to G. Rack-mount installat io n
Page 68 and 69: Robert B. Grove WA 4 PYQ Grove Ente
Page 70 and 71: proveme nt over the origina l To uc
Page 72 and 73: channe l l ; ente r 139.1 MHz into
Page 74 and 75: detector. Be sure receiver is sw it
Page 76 and 77: Joseph H. Cowen WA 5TUM P.O. Box 76
Page 78 and 79: an advance piece and aft erthe-fac
Page 80 and 81: 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
Page 86 and 87: TE1: ANTENNA SYSTEMS l-BoO-654 -}2}
Page 88 and 89: Robe rt M . Brown W9HBF 561 1 M idd
Page 90 and 91: c o u ra g i n g a n d wo r th repo
Page 92 and 93: elay (I used a 3PDT type) . When th
Page 94 and 95: '" '" 117 VAC NEON DIAL LITE .l 117
Page 96 and 97: Fig. 9. This view sho ws how the ra
Page 98 and 99: ~ ''' ' '' '' '' -- sli de the cap
Page 100 and 101: "' 0." -t ee' I CONNECTOR~ TO IlR M
Page 102 and 103: 1'::1" ~~4 ""ATTENTION MOBILE HAMS
Page 104 and 105: Patrick M cGuire W BSHGR 102 Dunca
Page 106 and 107: 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
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is sim p lif ied and refined t o al
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upts but often gets in the last wor
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signals. It decides tra nsm itter o
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.... Reader SelVice- see page 274 7
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IIEW IIIFFEIEIiT FROM BARKER & WILL
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Have you ever wondered why the best
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P ~ESCA l£ I NPUT C2 C1 I~ ;;-----
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A 40-pin socket must be used for th
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un til it changed tone and wo und d
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MF.J 941C Versa Tuner II , i i 11f!
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Two fuses are incl uded fo r safe t
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pu shed for th e switch to SSB and
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October 1960 .. .....de W2NSD PI ,a
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A M ATEUR RADIO 73 6' YIO carRad¥
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73 1964 January INCENTIVE LICENSING
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John W . CampbeJl W2ZCU How To Be A
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would simply melt the m selves in
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73 1966 Oc tober de W2NSD/l de W 2N
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162 73 Magazine . Oct ober, 1980 19
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1969 October ...de W2NSD/l rr ay ne
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1971 Decem ber Mean ingf ul Conu cu
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Jean Shepherd K20 RS Some Guys Make
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1973 July .......····n~ 73's HA
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1975 August 1: ~ '3~fr EOi TORJI'\.
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1978 August : :~~. Ir EOITOM'U8USHE
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1979 March ( UJoTOM'V 8USHEII W. ..
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manage o n 4o-mete r phone for the
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Fig. 3. Basic patte rn developed fr
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of-contac t are three: New England,
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32 ' I " 3 2 '" 3 2 ' . " 3 2 ' I "
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Gilding the Lily - FT-101 mod for c
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Mike Mods for the KDK-2016A - impro
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Clock Blocks a compendium of TTL an
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ea BOOK CIIlOS I"lV ERT ER "0001 "
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73 Magazine Staff Build a Better Ba
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TUfTS Electronic Department Store,.
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TUfTS Electronic Department Stor~"T
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TUfTS Electronic Department Stor~.T
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t.a IO,. H r "001 ,j- ± " ~ cs r u
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and 5. The purpose of the divide-by
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3500. To do this division by 3500,
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l i mi t er o utput on p i n twe lv
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Radio Amateurs! Tempo Handh
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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
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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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= = === = TEST E QUIPMENT =====:::;
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EALER PROPAGATION San Jose CA Bay a
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