Circle On Reader Service Card

C illcd for a reduction to K C7C of the original length to get 10 3.750 MHz (3.025 3.750). I lowered the antenna one time, cut It and raised it hack upt It resonated at 3.740 MHz the resistance was 4H ohms and the reactance was +1 ohm, The SWR was 1.1 1. That was close enough tor me, so I stopped right there. 1 removed the extra feedljne, and operated with the assurance tti.iit I was transferring maximum power to lhe antenna, and radiating maximum signal. My signal strength reports are up about...

KU

IBM h ri* riirmiKkJMk' Pan il frite Skrvlcc LKIUMIH pT Mt) SN.95 M I 'iHMii- L t Mfi SI4. S U'wrj LZmMifl LZf' jfvHljt S149 W5CWHO Ham Operator ducation Package Software Numcc E*tra I'ur PCX etmuiti , I m ill i M 2artil l rdis S.W.05 WfiHWNSW Mo-Code Ham Rad o Software Package for PC's, conldin Ktth I J .md 5 s i disk.' L rue Code Programs (Available on 1. r 1 disk.) fipm M supine cwde enk (fiflw IT h ' 1 ttatCb* .' - i HIT -I C und dk mM t. nao- W5CWHO Ham Operator ducation Package Software...

End Of Loop

K) Replace ha)Lwavelength feedline with yo r regular feedline. L> ) Raise the antenna. My method replaces steps 1.2. uud 3 and reduces the loop with an incremental adjustment of the existing feedline, Incremental adjustment is a way to extend your existing feedline to a true half wavelength of feedline lor multiple), without lowering the antenna V 10.4 5' 8.8 11 5Hl - m -m ----- w r - -t t- -r m- m m m u 3' 7.6 7' 3.25 14* 6.5 - - - - - - J . . .j. _ T T - _ _ - - - - - - - - -a - 5' l + 6...

Curtjs Keyer

INCLUDES AUGtO AMPLJFIER, IAMBIC KEYIMG, ADJUSTABLE SPEED CONTROL WJS SPEED METER_ 14vW FOS NEQ KEYING, TONE-WEIGHT CONTROL 1Q.Q0 MARCONI. 90 m w7.05 1bd m - i 44.05 J-PQLES (2M. AM, 220, 440 MHZ) B BS TO f 42. S E KAMPS TI AD . NH iilKft (Htfl 1-aOO LAOE PRO FAK MJ Jl* 44 9 U USA SMlFfiNO ChARQt VISA. MAS WCAft J. CMECW U 0 reitet 3 ft. laililCIlOtlOVhi

O

Equivalent circuit for Manley-Rowe relationshio analysis. qoency is the output frequency of the circuit which, incidentally, also operates as a frequency translator or con* verier. There are two general cases of non-degenerative parametric amplifiers up-converters and down-converters In the up-convener case the idler frequency is he sum of the pump and signal frequencies In the down-converter case, the idler frequency is the difference between pump and signal frequencies Power gain is...

Info

Fasten ihe phasing stub to the antenna with 10-24 hardware, Stainless steel hose clamps are used to connect the coax to the matching stub, and the end of the eoa. > sealed with RTY sealant or electrical tape. This antenna delivers good performance and has a respectable SWR curve over ihe entire 2 meter hand. Tuning is accomplished by sliding the feed point i where the coax is damped to the antenna I either up or down to secure the best mutch DeMaw, Doug. WIFH's Amenna Notebook,

BNB

Your ideas or ours. Excellent Quality. Foil stamping available. Many designs and type styles Catalog and samples 1.00 refundable. WtLKINS. Dept. A, Box 707, Atascadero CA 93423 BNB370 IT'S BACK The return of the HW-S Handbook Second printing. Modifications for the Heath ORP nys. First Class mail 11. DX add 4 for air mail shrpping Mike Bryce, W0SVGE, 2225 Mayflower NW, Massillon OH 44647 BNB404 ASTRON power supply brand-new w warranty, RS20M 95, RS35M 139, RS50M...

Look For Julys Special Of The Month

MONTHLY Z ClJN7 > APPlJCABL TC Nt jSEHSGM By simply changing adaptor cups, the MasterCharger will charge any Yaesu, Motorola, Icom, Kenwood, Alinco, etc. 2-Way Radio Battery If you have two different radios you'll only need one charger to accomodate both radios. Now by simply switching the switch to the left or right, you can determine which charging tup to activate. MYS residents add 8,5 sales Mx. Add S4 00 for postage and shipping.

Special Features

SOLID STATE ELECTRON fC ALLY REGULATED * FOLD-BACK CURRENT LIMITING Protects Power Supply from excessive current & continuous shorted output * CR0W8AR OVER VOLTAGE PROTECTION on all Models uupl flS-31. aS-4h. RS SA. RS 4L RS 5L * MAINTAIN REGULATION 4 LOW RiPPLE at low line input Vottage * HEAVY DUTY HEAT SINK CHASSIS MOUNT FUSE * THREE CONDUCTOR POWER CORD except tor RS 3A * ONE YEAR WARRANTY * MADE IN U.S.A.

Circle On Reader Service Caro

* Fa - hiii visusl * Ontct Tifchfl*. i IS4-U SIM ppd L'iA BrtflVVL* - N 1 C R*- Ittffl Mr dvMkilr M ri GStWl Hfl Uli - rJicTtm 2MM lint 1l W We specialize in C8 radio modification plans and hardware Frequency and FM conversion kits, repair books, plans, highperformance accessories. Thousands of satisfied customers since 19761 Catalog S3,

Mult Function

* Frequency Range 160-6meters(Tx) 1.8-30MHZ SSB, CW, FM 100 watts (10 watts low, 40watts AM) 50-54 MHz SSB, CW FM 10 watts (4watts AM) * Wide and narrow 500Hz CW filters included * Separate RIT and TXIT controls ( 1.4KHz) * Auto SSB mode select W ovenide * 38 CTCSS tones for deluxe FMing * Selectable RF preamp and attenuator * Sutxial for bands, memones, tuning * World's smallest 100w HF xcvt 2.25 x 7 x 9 inches(H.W.D.) * Optional mobile mount bracket * Optional manual antenna tuner This device...

Clrcle On Reader Service Card

Speak any phrases or words in any languages or dialect and your own voice is stored instantly in solid-state memory. Perfect for emergency warnings, club news bulletins, and DX alerts. Create unique fD and tait messages, and the ultimate in a real speech user mailbox only with a Mark 4. No other repeaters or controllers match Mark 4 in capability and features. That's why Mark 4 is the performance leader at amateur and commercial repeater sites around the world....

Kachima Communications Dealer

AUTHORIZED amplifiers DEALER g Shortwave Radios Stocked lta*wema DIGITAL FH QUENCY COUNTERS OPTOELECTRONICS model 1300 K A. 0 130 MHz 2300. 210 H. 0-2200 MHz. 2600H. UTC-3DOO. 2B1 Long-range Wireless elephone for overseas. CALL Government Stocked & Serviced Call for Great Prices

R K

Schematic for the Super CW Station. these parts together set the display brightness io your liking, set the decoder to the frequency for your rig, and enjoy it There are basically two sections to the CW station. The microprocessor circuit does all the processing in an 87C52, In it is an S kbyte program which the 11.0592 MHz crystal runs at a rate of about half a million instructions per second. When an incoming signal is received, the microprocessor measures the time of the clement...

Lzs

The above cortrinatlons are assenfcled and connected (in series). wavelength of the feedline. This is halfway between the peaks of the one-quarter and ihree-quaner wavelengths. Thai shows the ideal increment, the amount of added f'ced-line Lhal makes a half wavelength equivalent out of your existing feedline, without lowering the antennaf With that added length in place, you can measure the real resistance, reactance, and resonance. In my case, the half wavelength was reached by adding 0.34...

Bnbq

HTX-202 & FT-11R Simplified manual for Radio Shack and Yeasu handheids Tired of looking up baste programming sequences Simple instructions for the mos used programming, step by step ( 2 for the HTX-202.)( 4 for the FT-11R) please send S.A.S.E. Bill Andress (KC5HVV)3603 Edgemont Di Orange, Texas 77630 BNB220 rNCREDlBLE DX SITE for individual or ham dub in Northern Virginia ONE OF A KiNDl Fulfy furnished 2 bedroom cabin with 401 x 15' deck overlooking Shenandoah Valfey, 3,5 acres MOL on top...

Circle S On Reader Service Card

73 Amateur Radio Today * June, 1995 45 antenna coupler so intelli ent it ___ precisely mnes any length antenna 1 _1--- The Smartuner automaticaf y I *** evaluates and switches W input and 1 32 eu Lpul capac itatf combinations. ej S plus 256 inductance combination s in ----- 1 y pi network. Hie amazing resuIt is __ _ rr '' a-ver a half-mi II ion dif fttenl way to ensure a perfcn match for your transceiver And the f MJ most intelligent feature of all is that the Smartuner IJH remembers the chosen...

Packet Radio

* Perfect l or Portable + Assembled & Tested Whether you're an experienced packeteer or a newcomer wanting to explore packet for the fir.si iimet ihis is what you've been waiting for Thanks (o a breakthrough in digital signal processing, we have developed a liny, full-featured, packet modem at an unprecedented tow price. The BayPac Model BP- transforms your compatible computer into a powerful Packet TNC, capable of supporting sophisticated features like digipeating, file transfers, and...

Mfjb

Shows SWR, forward efleeted power in 2000 500 & 200 50 vatt ranges. 1,8-60 MHz. Mechanical zero. SO-239 onnectors. Lamp uses 12 VDC or 110 'AC with MFJ-1312. 12.95. Teflon* is a registered trademark of DuponV Nearest Dealer Orders 800-647-1800 Technical Help 800-647-TECH (8324) * r unconditional guarantee 30 day money bact guarantee less s h) on orderc from MFJ *Fr ealalo mm I Box 494, Miss. State, MS 39762 (601) 323-58 8-4 30 CST Mon-Fri AX (601 )323-6551 Add ft sfh Pfx Jtnj...

Rye

FOR Gffi CELLS OR LEAD-A CJD BATTEHSES 6 TO 2 V. 110 220 VAC, 50 60 HZ WJLL NOT OVERCHARGE*. U3E& UC3WW l.C 3 WITCH ABLE CURRENT, REVERSE BATTERY PROTECTION. TRJCKLE 3TA iT-UP. DBL SIDED PCS, SCREW TERMINALS, PTC FUSE. MANUAL BASIC Km ft TO 14V 1 AMP MAX I MVS 24 TO OPTIONS TRANSFORMER t 1G.& 5 auto low volt disconnect w alarm output . * 1g.g0

Slow Scan TV

Doesn't have to be expensive anymore Fvco more liactis.irc enhancing Ihcitcommiflncniimby tisln images Join rhtf fun .id ttf what ynuVc bci-n missing. Fvco more liactis.irc enhancing Ihcitcommiflncniimby tisln images Join rhtf fun .id ttf what ynuVc bci-n missing. Quai Uy Ol sSTV II rrtv .ine a nrlI .tb I n wiih Pawtdw H i 11Y M 5

S

Morse Tutor gM ts the answer for the quickest and easiest way for beginners and experts alike. From the moment you Man the easy and speedy self loading procedure 10 the you reach your goal Murse Tutor QM will gemty coach you through Hie learning process Since 1987, GGTE has guided nearly 20.000 hams and prospective hanis around ihe vvorldlhrou l proven structured lessons and a variety of character, Word and con ve rsal ion dri I Is. S11 a i gilt forward me nu s make the process simple and fun....

Blasts

Attention Morse Tutor and '-iorse Tutor Advanced hdiiion registered users. Make sure we have your current address-Special upgrade offers wilt be mailed shortly. bought Port t ridaif-passed my 5 words on Sttndaf. A teaP program- does ait rP s& id fahit w s fo& dsrf and m ms* wtPlm -5 mmP S of its triva Trvfif user frmdfif * tft Mf *5ePPer Pirn mtf w tet enperPaPioftsf Serrai d& r'Pkw t years ago. t s much better flu* ate m* Papes * < 3 fA 'Biffer tk test Worst Code program farffrws rf...

Mlc

* Give your repeater a variety of tall messages * Pre-scheduie announcements of special events * Digital packet cluster info converted to voice Complete system -computer board and software for 259 U.S. Many interesting features - call for information package 1-800-563-5351 Toll Free From USA 1-306-781-4451 1 -306-781 -2008 FAX 1 -306-781 -2070

Iku

- H 31'un*- K cfisgr cd lor y. nnl p or cta pitl Sfcypl'tri pO* f MPplifE IncMd > Hmdl n j r tin' ih ie-iunyoysi* 'i'idi W Jim. ht Dur i iC o-M h i vtmt tevrti fH to iras ma nAUt OHs )dtvn A riV P F_r Qfq ri l tH)l 11 1 al ul4Flabi tr sf i--iudt5 25 ii ouiii y loci m a f t

Uve Tv Video

Micro TV Cameras, Micro Video Transmitters, Receivers and low cost Downcorwerters. Amateur TV, Industrial, Security products. We have a system for you. Our video camera connected to our *WlmiLinkTArt transmitter receiver make a perfect combination for industrial security uses. We new cany Underwater cameras for you sailors, and cofor units for that true life view. With our PlarieTalk Airborne systems you can now be the pilott Ail cameras standard 1v p-p video, 7-l4vdc. We also carry Computer...

See The Space Shuttle Video

Many ATV repeaters and individuals are retransmitting Space Shuttle Video & Audio from their TVRO's tuned to Spacenet 2 transponder 9 or weather radar during significant storms, as well as home camcorder video. If it's being done in your area on 420 - check page 501 in the 94-95 ARRL Repeater Directory or call us, ATV repeaters are springing up all over - ail you need is one of the TVC-4G ATV 420-450 MHz downconveters, add any TV set to ch 2, 3 or 4 and a 70 CM antenna (you can use your 435...

JUNE

FRANKLIN, NJ The Somerset County ARS witl honor Gtigliefmo Marconi by holding a Special Event Day at Marconi Piaza in the Somerset section of Franklin Township. Station NW2P will be on the air 1300 UTC-2100 UTC (8 AM-4 PM local). Additional stations wpil operate at other Marconi srtes Cape Cod, Newfoundland, and England Voice and CW 15m Novice, 17m and 20m General. 2m and 6m SSBt 449.175(-) and 146,56 simplex. For a commemorative certificate, send your QSL card and a 941 x 12 SASE to SCARS, PO...

Totals

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The Ham Contact

PO Box 3624, Dept 73 Long Beach, CA 90803 Tho SG2GOC HF (TBnsceivCf a type accepted tor commercial ind mmt i service rnade with lradi> wal U.S commercial radio quar'ty i artel of Course < 1 can used on rna nam & anas ateoi Wt ie Jd panese ndtoi have 2 final uans lors '.hai strain to put oul 100 watte on trie to* i-ands and oniy 75-35 waHi on ten meters, thft SG OO i'.is A iransislOf tnai luaf A or Q at 150 watLs o-n AL THt 0ANDS INCLUDING 10 METERS Some Of 1he SG2QQ0 lealures (re 1) A...

All Sales Final

We stock AEA, Alinco, Ameco Ameri ron, Antenna Specialist, ARRL Astatic, Astron, 0& K. Beiden, Bencher, Bird, Bitternut. CES, CushcraftP Cordan, Daiwa, Elmac, Henry Heil. Hustler, Hy-Gain, lcom3 KLMf Kantronics, Kenwood, Larsen, Maxon, MFJ, Mirage, Motorola. Nye, Patomar, RF Products, Shune. Standard. TUBES & Tube Canons Uniden, Yaesu, Vrbroffex, Duplexers. Repealers, Scanners Radio Publications. WE NOW STOCK COMMERCIAL COMMUNICATIONS SYSTEMS HAM DEALER INQUIRES INVITED PHONE IN YOUR...

Bar Graph

Bleating signal strength, on most models. 11 f lPLIflER circuits are built nto all ATH series counters tor maximized - ultra high sensitivity. aii parts anti 1 year labor limited factory warranty. U made and very affordable - prices start under 120. All instruments are trtre Pocket Size 4 High x 3.5 Wiie*r Deep. < 14 cubic in. and are shipped with factory installed Ni-Carf batteries Antennas and various accessories are optional Terms Shipplpg tamdlinfj charges U S & Canada 5 ( 5 mlb , 11)...

Idler Tank

Drivos the diode capacitance to minimum. and it is at this time that capacitor charge is dumped to Ihe load To achieve degenerative parametric amplification. the phasing musi oe precise. anri his requirement means ihat ihe pump frequency must be the second harmonic of the signal frequency. A severe limitation to the degenerative parametric amplifier s the neces sity of precisely phasing ihe pump and signal waveforms. Dntt in either signal can reduce the gam or prevent ihe circuit from operating...

Ft

COAX W SILVER TEFLON PL259Ts A END lOOFTFWhW SPSilAeCTBVnAL tTl 5i) if HUHr ft EA 50FT RG21 lH MH- & PEC Qifl CT HUHrAL JKT 1 a SQMHi (SS to A lOCFT RflMJ FOAM 95 BRD UV RESISTANT JKT l 2d0 a 50MHz ., fofl WiA SOFT fttd'U FOAM BAD UV RE & 1STAM JKT 1 dB ff SOMH . frEA 5& 71 frcond 6.22) lor runs up id 1251l uv res jkt 2Z ft ft 4090 b cowd ( 16 & '30i ich runs up id moll blkuvfles jkt . 3ft'r 3& ft COPPER 4CGAAYWC JACKET 2& TT l& FT T& 3AT1WO COPPER 72TJ 2bTT ttGA T>...

Circle S On Reader Servjce Card

Sell your product in 73 Amateur Radio Today Call Dan Harper today 1-800-274-7373 1691 MHz Hemt Pre-amp. model TS-1691-P. Amp 1961 MHz Receiver modeJ TS-1691 -Recvr Decoder Board & Sofhvare model TS-VGA-SAT4 Track if Satellite Orbital Program. Tracks ALL saieliites. world map, print out 1691 MHz Loop Ysgi Antenna modei 1691-LY(N)

Canning Parkway Victor Ny

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June July

OSHKOSH, Wl Members of Ihe Winnebago ARC witl operate AA9GO 1600Z-03Q0Z June 30-July 4, to celebrate the 24th annual Sawdust Days Festival. Operation wiii be on the 80 to 10 meter bands. Send QSL and SASE 10 envelope to AA9GOr Michael O O'Connor 519 Franklin SLt Oshkosh Wt 549014 EH

Books For Beginners

TAB435't tha Beginner s Handbook oi Amateur Radio, Third Ediiion h Clay W5ZPV, Wonderl ul hook tor ncWCpUl- t h r- biLv 11 ithJ well illnsirati J Ev.-m 11 yini hjve all (Jlc odici bim handle kv w j U hnd lh xDiL ui S2IW W5GWNV No-Code VidM, Manual. Part 97 ftules Lhim fun* 10 i t'.-im ndio Cfteracor S29. 5 W5GWNC Technictan Class License Manual New No-Code b ti( ythu lV .'ir Tin hook covers everything > i'ii need to btiCunie a T ciuii-. i.ii CLus. Ham. Every i iiestion and aii i iT un the...

Transmitting Converters

Models to convert 10M ssb, cw fm, etc to 2MT 432, 435. and atv 1W output Kit only SB9 tvhf , 599 uhf) PA's up to sveibCfe Eprom-controllod, miniature easy to build, low p wef CMOS only 554 kit 79 wft COR-6 COR & Real Vorce ID on one board. Digital ic records up to 20 seconds of your voice Can record multiple id messages Ta l and time-out timers courtesy beep, solidstate relay to key transmitter S99. w t 149 COR-3 COR, timers, court.beep kit 49 CWID Diode...

Satellite Tracking

The STO offers users hordwure ond software for automatic satellite trucking. Automatically controls Yaesu 5400 5600 Azimuth-Elevation rotois and con also be used with other rotors. AutomatKoliy tunes mony transceivers including the FT-736, TS-790, iC-970, and the IC-47S 275. Software included with the SH is n compfetdy lesicienf program (T5R), so your computer isn't tied up when tracking. Software such as InstantTrack, Quiddrack, RealTrock, PG_AEA, PB ond PG are compatible with the SR Allows...

High Power Rf Switched Preamps

Model 146 16QW 2 Meters 19< JbGaJn ,75db Mf Model 1460S1 SOW 2 Meters 19db Gain 75db Mf Model 440 70cm 100 W 1 Gdb Gain ,754b Nf All prnamps have helical filters to prevent out of oand intermodulayoff in the receiver Model 146 covers the entire 2 meter band. Model 14SOS is of very iarrow bandwidth and would be suitable forSSB orSalellite Mode 440 s tunable from 430-440 MHz or 440-450 MHz per customer request All models are powered wth 13 to 20 VDC ana are mounted at the antenna

Antenna Wire

T4QA fifl STR SUFWiBT UNI SULATEG SFT 1-K1A 7 -HARD DfiAWW UNLNSbLATEQ lCVFT H GA SOUD XQPFEFWE itr UNINSU HQASOLID'BAFIECOPPiFT UNINSULATED - . .Cft FT liGAlWZS WE COPPER UMMBULATED J& FT 16GA 2Mb BAR COPW PVC IS5UIATEO flWT 14GA 4 SARECOPPEFTiVC INSULATED lfff t3flAS43C aARE COPPER FVCWSJJTEC 17JFT i GGA 2C T EKIBLE CI LAQAS HES3TANT RED BLM 40TT 12QAK F IEXBlF OtLiQAS RESISTANT RED H LA Zl 3d'FT

Jo

W'Qn I pek Wayne'i C rihhcan Advent 11 n s Jnji .avili- -n ilvi-ntufi'-- '.uil diving ,ih'iind I he t jubk-jH viatmf Kjuii openttK , and Mght-mlvih ymi'nt interrsied m h' t eu trj - eeo-iHHiuCjiUly II re - rihe rej kkt Imn thi He - un L-ui w h bir. Dmit lit- W mp S rt YouTIl k Mf lh-' i ate h' 11 *bml> ir Jajr trtf- mcd-i WG7 I'ucto Wnjne*s Imveh Wa netrav-i l'Is 10 R m .m l.ordon vn, .SL fiera- Mtmich, Vienna, Krakow, jnd Ptt ue -itiioui il inv-ring neaKy a- much *syOu mijjhi tloril Cheap...

Cbc International

LOU FRANKLIN K6NH Ownet PU BOX 31 3 0 X PHOENIX A2 8504b Remote control, Long tone detector, DTMF deteclor, and DTMF monitor all in one urut * Four simultaneously monitored DTMF cvenLs (any combination of long tone or DTMF), - Any character long tone events. Minimum duration programmable from .1 to 5 seconds DTMF key code sequence events of up to 16 characters each, I to 3 char, group call-up. * Two independently controllable relays attached to event occurrences ton. off. toggle). * 2400 BPS...

Circle J On Reader Service Card

ElHd it m voicr Ii hi -j .1 walkine < -i rn Jik Ol nturtunuTn wiih iuM t envk. Uut m- irtk fe all the eLcmcrus i I efcmctH > iQ ihdl lo eihci jri mitrale* Rradj for W L ilkini- Ready in (sei y.mi Murml mi of hnlr i run ihe rcpcnlci fillte tu dnip Jirul ivi lust. Everything Ills ck tl jithJ ti hi und kl ugh, 2rinc(crs T t cm S4'J. Weighs cwtv I Ib. AiM Sfi Shipping A Hindling. In 'nS1 An (en n as West rde r 11 < 111 .i ne flpy 5aOf -5 Pruw IT SiM _80 373 B425 _

Syk

SCR1400 REPEATER W 150 WT 2M Amp & 30A POWER SUPPLY. (All items available separately) Call or write today for details and prices Get your order in A.S.A.P, Sold Factory Direct or through Export Sales Reps, only. For that new Machine Spectrum makes 2 lines of Repeaters the Deluxe SCR 1400 and the new basic low cost S-7R line. The S*7R Repeaters maintain the quality of design, components and construction which have made Spec trum gear famous throughout the world for years. However, all of the...

Loop

3) Raise ihe antenna to regular operating height. 18.13MH 0- 4.3 0' 8.G V 5.2' m m n r-in aiii ali d w -r < -r -i -I -'frs > < 0 5.4J 0' 10.fl I' 9.8* mmmwmm- - - r * r < m m m - - * h * . . * im. m A _ 7.2W1 (T 10,8 r 9.6 3' 7.3' 4i Measure the resistance, reactaacc, and resonant frequency. If the resistance is within 10 i ofihe feedline impedance and the reactance is between +5 and -5 ohms i a good match), and Uil- resonant frequency wnhin you ha e goin.1 power transfer and radiation....

Ch I Ps Witch

Suite 132 Santa Rosa, CA 95409-4269 Wrirtr tir mil (707) 53JW> 512 fur llir.l- Ictfonnntldn SWR < 1.2 1 acroitt the band Gain of a 15 ft Yugi No dimension over 7 fi 4 dB Ftmt Back Ratio 60s Hall-powei Bejm > diii Mouitu directly 10 m si fenitat ur Horiicntal fokruaikm j cirra Sl4f. 220 MHz 4i. 70cm Dual 440Slo5 Weighs anl> 10 Sl. Add Si 1 Shipping & Hatidlm . Into S

Kawa Records

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Inc

COAX (LOW LOSS GROUP) 100FT UP50 FT TL KIBlFWl3F01L+mBRAI 7( 4 40tlMHl . WFT i& FJ aei EQuAiFoiL miD Tie 9 4WMKT AS FT FT LUR fiDDOaaUU JACKET lTfrGtJSlftfc__ 7 fT UtfSODDaSKDDiAJ CXET I tfti a 4S MI 4 3& FT (Xm HG 213 U Mil -SPEC DIRECT BURIAL. it KE t.fld O SOMNz ft U fOm BRD UV RE& STAMT JACKET ff SOMrtf ft BRD SIX StVEa CUAfl Lrt R JCT RG214U SK.Vtn BRAD STCLDS UkSPEC_ *< 12ffjt O0L SitVffl SUD TEF O f 25.Q C ft GMHl r 9& u 96 bflajc _____ ResflMjafisrcewD MO OHM 4A EflLINf...

M

With OiiK six ICs, the whole circuit won't take up much room in a standard-size transceiver, or on a ham shack bench if left external in its own box l The 567 decoder FLL has been used for many years as a D I MF tone decoder, making ii a time-proven device. UIBT with the help of IJ'St makes sure Lhe tone is decoded for the proper length of time before giving a v.ilid output, eliminating falsing If used as un external accessory to your transceiver, ihis circuit should be enclosed in...

J

If you warn lo try practicing copying words in your head, you can set the group size to 0 or 1. The code generator will send random words continuously and they will scroll across the scrcerr You won't be able to write the words and check them, but if you want to learn to copy in your head this will give you good training. The third menu is the character menu, which lets you select which characters you want to practice. It is only displayed if you selcct the CHRS mode, When it is first...

Order Lene Canada Usa Mexico

FAX UNE 714 847448 16201 OSBORNE ST WESTMINSTER, CA. 92683 MO. VISA MasterCard intl bank wire More hams use MFJ-949fs than any other tuner in the world Why settle for an imitation when you can have the real thins Pick one up at your favorite dealer no shipping no waiting, no hassles

Bj

Affat abta eic-irnmaynti.c itmf find n-HnrovKavB lesls mnd easyl FM Receiver Kit & Training Course 44.95 iitmt .p Bi Jiih friIn J. f f f iRrrr , Uj II I ' i i-a uir ha j itjIuj1 rjn it Ou l i fiTf r i n up iPrln3> nr loan m sm rircLi porli li Igt ai h i D y- -il J1C rr(ni cjhi C npfrt* Btru jt F4f DuitAng. Tt lng. j t f .-1 3 r c -kf.Lp Qm b Learn to Build and P o ram C mpuitri with this Kit

Attention Qrp Enthusiasts

The SCOUT has a little brother, the ARGO 556. It is identical to the SCOUT without the 50 watt final, adjustable 1-5 waits output, TX-2 Amps, RX-,6 Amps, Only 489* SYNCHRO-LOCK software keeps VFO virtually drift free regardless of temperature variation. SSB and CW 50 Watts Output Adjustable To 5 Watts Runs Off 12-14 VDC, TX -10 Amps, RX -.6 Amps Built -in Iambic Keyer with Legendary QSK. Speed adjustable on front and shown in display. Includes one band module of your choice 529* Eoch additional...

Rep Repeater

A fully microprocessor-controlled repeater with autopatch and many versatile dtmf control features at less than you might pay for a bare-bones repeater or controller alonei Krt still only 1095 w& t stiff only 1295 5< J & WJ0 MHt SliQftUv higher Available for the 5Q-54, 143-174, 213-233, 420-47S 902-928 MHz bands *FCC type accepted for commercial Service m150 & 450 banos REP-2GQT Voice Message Repeater, as above excepi includes Digital Voice Recorder Allows message up to 20 sec to be...

Curtis Ken Er

HCLUEJES fiJJOO AMPUflER. lAfrf& C KEYMG, ADJUSTABLE SPEED CONTROL 3SSS, SPEED METER-----1 1 JD PC5S NEC KEYING. TONE WiGHT CONTROL S UHM > tO CTS1 MiHtS7 iM* Ii ajJCA HXn. I OCi M SA vus m-e Jw 2 Hz to 12 MHz, 2 Hz steps. Sine and TTL, Dip switch or parallel bus controlled. - 3x4* PWB. Requires + -5 VDC. 5ppm internal crystal oscillator 8 bit PC bus version of DDS-3+ Sine output to +20dBm into 50 O. 0-70 dB step attenuator added. Provision for external clock added. V-Basic and C software...

Wbgmk Antennas

WB2GMK Antennas has announced the CobWebb,* a highly-efficient, limited space HF anienna designed by Steve Webb G3TPW, and manufactured by SRW Communications in Yorkshire. England. This antenna covers 14, 18. 2t 24 and 20 MHz with a square design only 8 feet on each side It weighs only 14 lbs t6 kg), so it mounts easily on a lightweight TV-type pole. Despite this ultra-compact design, the manulacturer s specifications indicate lhat Ihe antenna 1 unctions al ihe same efficiency as a full-size,...

Super Cw

It lets ou select only those exact characters you want to practice. The second mode sends 3(H) different common CW words. The third mode sends random callsigns. This feature will help you gel ready for that CW test which always has at least two callsigns you will need lo copy. Works an iambic keyer 12 Lo 40 w pm i. Has three message memories. You see the words you are storing in memory and can backspace to correct any errors* Displays all the CW characters on a 40-eharacter by two-line...

Accessories

Records up to 20 sec of your voice with built-in mic or external mic. Terrific as voice iDer for repealed or fox hunl xmir contest calmer radio notepad, etc. Extensive manual tetls how to use multiple messages adapl to many applications __ kit S59, w& t 99 TD-4 SELECTIVE CALLING Module. Versa j re dtmf controBer with 1 latch ng Output Mutes speaker until someone calls by sending your 4-digit tt code Or use it wiih a long tt zero digit to atert anyone in club....

Uhf Repeater

Make fiigh quality UHF repeaters from GE Master fl mobiles * 40 Watt Mobile-Radio S199 ' Duplexing and tuning information Si2 Information without radio 40 Orders 1-800-455-5548 For info 307-2B6-1700 P.O. Box 4012 Casper, Wyoming 82g 4 Photo A. Carole Perry WB2MGP uses globes to make a point with eighth-graders Jordan KB2PYS and Ren e KB2QMR.

Rgx Rg

I determined the velocity factor of my length of coax with a noise bridge and a general-coverage receiver. I used the simple formula VF _ Lf 984 x N. where VF velocity factor. L tine length in feet, f frequency in MHz,t and N number of electncal wavelengths in the line. To use this forrnuta, select a piece of the coaxial cable you are going to use. t should be equal to, or slightly longer lhanr either one-quarter wavelength or one-half wavelength for the frequency of greatesl interest. Attach a...

We Call It The Scout

Every feature can be mastered in minutes. No modern rig is as easy to use, It only takes a second to change bands. Plug-in modules are available for 160-50 meters including WARC. Single conversion and crystal mixing are the foundation of this 90 dB dynamic range receiver That's the strong signal performance of rigs costing 3 times as much It's sensitive and receive audio is sparkling clean with less than 2 distortion. The ideal selectivity for every band condition is at the touch of a knob....

Logsat Software Corporation

LogSat Software Corporation has formed a joint international business veniure lo develop, produce and distribute a commercial satellite tracking program called LogSai pn -f. Sional version 5,0 for Windows. LogSat Professional allows both experienced and inexperienced computer owners to irark thousands of satellitos in dozens of Windows with all types of visual graphics. The program can be used by everyone from home based owners with satellite dishes who want to watch overseas programs, to ham...

Shortwave

BPAVV9 P 1995 Passport to World Sand Radio ' tnii ry lit* - r Rrtmdi listing Smu'rs Lid V -u'll grl thu joJ 07R25 The RTTV List en or fry t nrf i hit'r-imw New LiruJ e purd d Tin npotiidi fU Uwk tompites issues I through 23 nf the KtTY Lsu-urr Ntwsttih't CunLntii Lif-n> -JjiLL LirJ irt H .iiL, t Oll Jdv lE rd RT t V mJ i- V ifttiaittiritip iixt n L) and I'rt'jLiirhk n'n 09542 TTie Scannet Listeiier s Handbook hv ti ivant Stumm' N2BFF Gel ihe dm sI mil oT CRQSIU1 Scanner Wlodiflcatton...

Hiperformance Dipoles

H I O. . -C rtffrr TT rr prir-l 11 f 1J SS -6 i6C-ea.40 1 lOUty*c*4*wr04M 71 bng _____ fhti . H I O. . -C rtffrr TT rr prir-l 11 f 1J SS -6 i6C-ea.40 1 lOUty*c*4*wr04M 71 bng _____ fhti . S D-S* fl jp. . IN, tpf i ' ttto,M Mlciri IIM.go L1, n i 0 Snn jl wilh Wc n. Mflif.M, -ip R.iniy1 Twr r . SAH por A linn 16.0 tor CBLuhjg of SOdlpole loper i> *hjlh .jiMennnn

Wrap

The Onfy Materia That Will Adhere uy Polyvinyl or Vrny) OLiter Coax Jackets COAX-SEAL Trvt L p-i-1* frjt *-*1*tL*l II umpai bfi*ncn*i cd pnfc Wt p to L-urtt reward HI -11 n n AttCI wrapping, nuld io torn jm lh lui Tace Jind < > m Forms around and seals odd-shaped finings. Non-contaminating and non-conductive, Wide amb-sr' lemp ature range (-30 Fm+lflO F) Stays fleiib'e lor years insuring moisiure-prooi conneciions. Fe uE.aDl -quick disconnection and resea ling with same material A must far...

Old Timers

Operators with years of experience and a shack full of expensive H F gear also buy the SCOUT. It's refreshing to many who say It takes 5 minutes to learn and without all the complicated features, there is only one thing to do with o SCOUT, work someone Experienced hams call us constantly to report can't believe this receiver, it outperforms my 1400 synthesized rig. Call Ten-Tec from 9 00 AM to 5 30 PM Eastern time, Monday through Friday for more information or to order. You can reach our repair...

A

Over 1,130,000 listings and 05 Countries Incudes U.S. Outs & Military Stations, ICALL DOS A windows program looks up name, address, exptrsio dgie, year class county tai.Tong. area code zone, eievat rih beam headirg a totance between U S taiions Grid Square. Retrieve by any data element on PC, caH. name and up on the MAC Hundreds of new shareware porgrams are on Ifrts dtsc, For a larger collection of software ask about IElectronics Software Compendium CD ROM Wo iiard disk required * Print...

Optional

QPTIOH ffHST-15 is a high accuracy, high stability, time base upgrade that can be ordered with any ATH series model f 0.2PPM CALL BAND PASS FILTERS EXTEND READABtLfTY DISTANCE Call For Price flLP-GO DC - 60 MHZ MBPASQ 130 500 MHZ dHP-400 1QQ - T500 MHZ HP-800 6C0 200 MHZ Enter a completely new dimension in HF enjoyment with the hottest transceiver today Alinco's DX-70T. This incredibly compact 100 watt delight is priced comparable to its size, yet loaded with today's most wanted features,...

Ga Rfielo Street Ne Wing Ton Ct

W F'06 hv rd ft 3 Same Day C O.D s 5AT 1(M L J1 ' Snipping OK If you or your family are still using electric blankets, you're asking for major problems. Most of the other home electronic equipment is lairly benign, or is used for only a short time. But if you've seen some of the photos of guys who tost their chins to cancer due to using electric shavers, you'd better understand what a tew added mihgauss applied regularly can do. The most vulnerable are youngsters, but extended exposure can do...

Miniature Preamp

Still only 29 kit, 44 wlrod& tcsted * Small size Only 5 8*W x 1-S 8ML x ' H * Solder terminals fof coax & pwr connect. pea y tuning rar,ge- 25-35 35-55, 55-90. 9Q-i Q r.-O-TSD 50-200,200 270, 400-500MH2 Helical resonator filters may reduce your intermod & cross-band interference.

Shortwave Receivers Stocked

ALINCO EXF560T, DJ-5B2T, DJ-FIT, DJ-F1TH, DFH30 430T, DJ-16GTfTYi Privacy scramblers for radios and phones. CALL Wide selection of SW Amateur Publications Btno Wattmeters & Elements tn Stock AH7FMUS lEMItlTJLJtrM, AN Li, AJIKwij Sp r iH t, Sark A Wilfiariifln. CpwtfLCushcHlL OljtmorwlGA . Hr tm. r.AOtt. rwn Ele. EIMAC 3-500Z 572B, 6JS6C 12BY7A& 6146B BIRD attmeters & Elements In Stock

Spy On The Earth

CapCtire ive breathtaking images of he Eanh lor tun Of pftrfh Zoom in up to 2QX Send 39 check or M O. 45 air, 50 overseas) lor our fantastic 12 diskette sei of professional quality copyrighted programs (IBM type) hat does satellite tracking., image acquisition, image processing, 3-D projections end more Direct reception from ihe safeties guaranteed worid*ide without a sateiMe dish Schemaiics included for interface. For FREE inlormation log-on to our bufeim board anytime a( (718) 740-3911. Dept....

Down East Microwave Inc Transverters

50 MHz - GaAs FET, High level mixer, 20W, Assem. PCB, Kit 295 144 MHz - GaAs FET, High level mixer, 25W, Kit S295, Assem 395 222 MHz - GaAs FET, High level mixer, 30W, Kit 295, Assem 395 432 440 MHz - GaAs FET, High level mixer, Dual osc., 30W, Assem. S395 903 MHz< 1 OdB NF, 10W,Assem 395 1296 MHz< 1.0dB NF, 3W, Kit 295 2304-3456 MHz - 1.0dB NF, 2 Watts, Assem. Options available for alt of the above Write or call for Catalog. Product descriptions available.

Get The Atv

Made in USA Value + Quality from over 25years in ATV W60RG Snow free line of sight DX is 90 miles - assuming 14 dBd antennas at both ends. 10 Watts in this one box may be all you need for local simplex or repeater ATV. Use any home TV camera or camcorder by plugging Ihe composite video and audio into the front phono jacks. Add 70cm antenna, coax, 13.8 Vdc 3 Amps, TV set and you're on the air it's that easy TC70-10 has adjustable 10 Watt p.e.p. with one xtal on 439.25, 434.0 or 426.25 MHz &...

Weather Satellite Receiver

Our R138 Is The Most Affordable Wefax Receiver' ' V- We used our 30+ years of experience in designing high-quality vhf receivers to bring you this enhanced version of our long-popular WeFax Receiver, a very sensitive wideband fm receiver especially for amateur reception of NQAA and Meteosat weather facsimile images on I he 137 MHz band Use with demodulators and software from MultiFa* S.S.C A& A Eng and others Features 0 2pV sensitivity wideband fitters for low distortion, and four crystal...

Measure Deviation

The DM-1 s a deviation meter for FM transmitters operating in the 144, 220, or 440 MHz amateur bonds, Dystd controlled no tuning required. Dual deviation ranges allow accurate measurement of voice, data, DTMFr and subcudible deviation Accurate deviation adjustment insures faster throughput ori packet Automatic disable with low battery voltage ensures accuracy, ompoct ond battery powered for convenient use anywhere, Outputs for external digital or analog meters, and an audio output for...

Wayne Writes

ni il 1 m Afifti puH catkns on budding receivct*. mauiineri. imv R427li H't RultBook A iihlm for l'1- .-i .mi1.l' fadki flniBilcLU ARii. fi VI I Code Fhe Ksstntiil Lvnf> ua e try L Peir* < ir*> i Jr. W T> KY Expanded aol u& d in its i-Jnnm H,va 1- . TminJUe digress heard noi i d ihe hambiinds but on 1 AdthliQdint ( j ic El ironies ARRL M bit fhi- cxphir e ftv thin ver) Mittply ibe math. IX4, AC Kmsiaof . cv en tubes l owh lsrt he.151 M > 1 7 laft it Lh'l i.in itiTij yon dn St inl...

Mfj E

Call your dealer for your best price Includes FREE AC adapter for meter light More hams use MFJ-949 *s than any other antenna tuner in the world Why Because the world's leading tuner has earned a worldwide reputation for being able to match just about anything. MFJ-949s have been highly refined and have years of proven reliability. Every MFJ-949E comes with MFJ's famous one year No Matter Whar* unconditional guarantee , first-rate performance, unbeatable quality,. T the best tuner value in ham...

Atv

But Brown WBSELK co 3 Magazine 70 Route 202 North Peterborough NH 03458 In early April I attended a high power rocketry event sponsored by the Tripoli Rocketry Association. Lo cated ai a site called the Spears Range, near Manchester. Tennessee, this weekend event drew rocket enthusiasts from several states and featured moderate to very large rockets thai flew nearly continuously during eacn d y from more than ri,ne launch pads. These are not your lypical hobby shop kind ol model rocket some...

June A

PLYMOUTH, CT Radio amateurs in Plymouth wii operate designated s a-tions to celebrate the bicentennial of the Town of Ptymouth. A limited number of special certificates are being made available by the Bicentennial Committee to commemorate the contact Operation will be in the General portions of 1601 60. 40. 20. 15, and 10 meters as propagation aiiows, QSL with an SASE to K1EM. PO, Box 12. Pequabuck CT 06781 USA Include a shipping container large enough to hoW the 9 1 4' x 13 3M- cenifirate, or...

An Inexpensive Morse Code Keyer

A friend of mine recently convinced me to take the examination for an amateur radio license. I hud previously considered obtaining a license hut was less than thrilled with the prospect of learning Morse code. I jrgued that I was as dumb as a stomp when ii came to memorization bat was assured ill at learning code was not as touch as it I realized that the best way for me to learn Morse eodc was to actually generate the sounds, I perused the various amateur radio publications in search of a CW...

Antenna Tuner

SGC Building 13737 S.E. 26th St. P.O. Box 3526 Bellevue WA 98009 Telephone (206) 746 5310 (800) 259-7331 Fax 206) 746*6384 Price Class 595 A longwire tuner for use on land or at sea ny idea what the initials 'SGC stand for lJi you are an old-time ham or you got your start in amateur radio from Class D Citizens Band, you will recognize the name 'Sioner standing lor the letter US, and MGoraf standing for the HG ' in SGC. Don Stoner W6TNX pioneered premium-quality SSB CB transceivers in...

Onl Y A Few L

Book by f Titvlq RA lliisb .l At toviluahk source oi inloftrajiEun oi ever* day relevance rr- lik world - l eloclii rues It ctmuirsnoi milv cttotiv llui deal with the c etm.il theory 1 1 elecimnii crrcuilv. hut it also deals, with wide run e tii pnn licnl c I cc ronic ap > l kjitlons. 8.00 Jtnepti J Cat t Was mit 1 en im dccirnnict hotihyi 10 iroviik in hi mto prjeti-li s work 111 actual ciicuiS. includiag .1(1.1 toe (linearI .md di iuJ circuit- In tin-easy to urnlet-i.muI k> itk thai...

Ham Radio Station Rege Dvorsky

These guys are preparing to launch an ATV rocket that will eventually land amidst a herd of cows. See page 64 for the details. A iongwire tuner for use on land or at sea The perfect The COY2M3EL Stealth VHF Yagi A 144 MHz antenna from Swiech Communications Systems KT2B r s like home liiere right here im iti offices 1 I fust lake advantage nl uut FEEDBACK list on PlIP 17 You'll notice k fbedhuck numbei .M Ehe beginning ofetdi article .util column We d 111. - h to nw ix hat you read so itnu wc...

C W Wolfe Communications

ClRCtE 3 ON R ADEH SfcflVICE CARD AU ,u 3 i ppil Irtil I J) lift Hi -i In m II F r HfiriMrt Jir rMl rv jd< l l< i AS Al* 519.95 19.9J 39.95 44.95 79.95 Compact Only I x 2.5 x T An inch shorter tlian a pack of ciga-lettes Powerful Z-181 high integration MPt with one megabyte address pace. Area powerhouse Inexpensive Onlv US 129 (32k RAM model). Perfect Beginner's TNC hvery feature you would expect in a normal size* AX.25 1200 baud TNC, plus Oil-Line HELP So easv to learn TVpe Help and a...

Antique Radio Classified

Antique Radio's Largest-Circulation Monthly Magazine Articles - Classifieds - Ads for Pans & Services Also Early TV, Ham EqutpM Books, Telegraph, 40 s & 50ps Radios & more. Free 20-word ad each month. Don't miss out 1-Year 29.95 ( 47.95 by 1st Class) 5-Month Trial - 16,95. Foreign - Write. A.R.C., P.O. Box 802-E9, Carlisle, MA 01741 Or Calf (50 ) 371-0512 T ie World of Ham Radio Callsign May 95 Database You can have the IfeUs) L'S and Foreign culkigns Available. 0,000+ software Flits...

Ramsey Electronics Inc Canning Parkway Victor Ny

For a sftch little QRP boost. use one oi the 20 Wat amplifiers, Needs onty watts oi drive tor full output, linear for SSB AM or CW operation, power MOSFETs for high efficiency and multistage low pass filter lor a c ean signa' 8u it n T'R re ay for automatic switching, runs on 12-lS VDC ai 2-4 amps Adci our matching case set lor a complete station look. Yourchofce oi bands Si 9,95 Specify band (QAlWP-20, 30. 40, B0) CD AMP Matching case sel 514.95 LI (pi fc J COM-3 lhe world's most popular ri i...

Netsurf Over To Parallax

We're now available on Internet so you can contact us more easily than before Send email to info amp parailaxinc.com Ftp to ftp,paraliaxinc.com 20-MHz in-circuTt debugging for PIC16C5x 64 71 84 , Set breakpoints, step through code, and modify registers Friendly DOS and Windows software, 599 each separate units for l5xn and xx PICs Programmer for PIC16C5x 64 71 74 84 Docs on disk user-supplied cables 99 Printed manuals cables power supply 199 3805 Atherton Road, 102 Rocklin, CA 95765 USA 916...

Xuron Corporation

XUBON Corporation is offering a new catalog thai includes a full line ot specially hanfi shears, flush cutlers, wire cutters, pliers, crimpers and compact pneumatic cutters for industrial or electronic assembly and field service use xuf ON s Timeless Engineering Catalog describes over 100 variations ol economically designed special purpose shears and flush cutlers that feature XURON's patented Micro-Shear bypass technology which provides a clean square cut using less force than conventional...

Rf

Circulator

RF app ie to Port 1 rotates wilh arrow to Pan 3 with V try Hille loss Circulator showing RF ima n fee low loss from Port JM to Pod wrtti reium reflection due to SWR ratio , Back teed from antenna jr o Port a3 srrd Dialed o For -2 5 absorfceti isapated tn tenrinat on of Port -2 preventing retiecSrlg amp ry power to Port 1. Circulator showing RF ima n fee low loss from Port JM to Pod wrtti reium reflection due to SWR ratio , Back teed from antenna jr o Port a3 srrd Dialed o For -2 5 absorfceti...

Catalog

Outside the u s A send S2 00 postage ALL ELECTRONICS CORPORATION P.O. Box 567 Van Nuys. CA 91408 FAX 818 781-2653 Carote Perry WB2MGP Media Mentors inc. Staten island NY 10313-0006 Most amateur radio operators recognize the relationship between speaking around the wohd and sharpening one's geography skills Teachers who use amateur radio in ihe classroom will attesi to the value of learning geography on a need-to-know basis. Adding relevance and a little fun and excitement to the fearntng...

Arrl Central Division Convention

INDIANA'S LARGEST HAM RADIO AND ELECTRONICS FLEA MARKET EASY ACCESS, 1-465 amp 1-74 AT THE MARION COUNTY FAIRGROUNDS COMMERCIAL EX LIB ITS INDOOR AND OUTDOOR FLEA MARKET FORUMS OVERNIGHT CAMPING AVAILABLE PRIZES Write or call Indianapolis Hamfest Association, P.O. Box 88677, Indianapolis, IN 46208 317 251-4407 FOR INFORMATION CALL 504 924-7708 FOR INFORMATION CALL 504 924-7708 HAVING PROBLEMS TAKING TOWERS DOWN We're sure you're aware of the back breaking work involved in uncoupling tower...

The KK from AEA

Colorado Video Detector Video 630

Have you ever had the perfect ham accessory and then lost it somehow never to find it again7 I think that each ot us has, at some time had the most wonderful ham-related item and then sold it. traded it or broke it, losing il forever, in my case, the perfect CW keyer crossed my palh about 10 years ago in the form of the Heathkit CW keyboard It performed flawlessly. With a large type-ahead buffer, soft sectored memories, and the easiest operation possible, it became a good friend until, in a fjt...

Battery Monitor and Charger Controller

Many hams have a 12-volt automobile battery under the operating table for a variety of uses. There is a continuing need to know the batter voltage and to keep it charged, A hassle-free means of solving these two problems is offered by the battery monitor and charger controller described in this article. Thiv unit displays the battery voltage on a 10-segmenl bar LED in increments of 0,5 volts over the range of 10.0 10 14.5 volts. When ihe batten voltage drops to 12.0 volts the unit automatically...

The Coymel Stealth VHF Yagi

Simple Gamma Match

A 144 MHz antenna from Swiech Communications Systems. While doing some cEeanup this pasi spring in my amateur radio barn a small shed in my back yard full of masting, antennas and coax , i came across an ofd, beat-up. bent dented and otherwise Cashable KLM four-element 2 meter yagi I ve owned this particular antenna tor about 14 years and it has really been through the nnger. accompanying me on over a dozen mountaintopping trips, more than a few Field Days, and several public service events. It...

Rkk

Figure 1 The schematic for the BayCom RTTY interface MichaeiJL GtherKBWM c o 3 Magazine 70 Route 202 North Peterborough NH 03458 In this column, I have many limes menjioned the use ot Test equipment ranging from ihe old-style analog volt-meler sfi 1 a useful item jn mis digital age lo the oscilloscope. Taking proper measurements is one of the mosi important skills in electronic troubleshooting constructing or experimenting. At firsl thought, ihe process of taking measurements might seem s mo e...

Amtemas

Hustler. KLM. METZ. Urban, M CUBLOX. TONNA, Butternut. Multi-Band YAESU FT-23R 26 76 FT411 11-911 FTH-2008 700Q JCOM CC2 3MSAT ICQ2AT 2SRA IG2y4GAT 24AT C-A21AJ1B Patches telephone calls from your radio to phone line, Great for making and receiving phone calis where there are no phone Sines, Simple to use. Write or lax for inquires Arrtentnyr. Icoti Kenwood. Yae amp u