Accessories

Available foi the 143-174, 213-233, 420-475, 902-928 MHz bands. FCC type accepted for commercial service imso & 450 bards, Six courtesy beep types including two pleasant mulb 'tone bursts Open or closed access autopatch, toll-calf restrict auto-disconnect He verse Autopatch, two types DTMF CONTROL over 45 functions can be controHed by 4-diglt dtmf command, via radio or telephone. Owner can inhibit autopatch or re- REP-200T Voice Message Repeater, as above, except rnciudes Digitaf Voice...

All Sales Final

Ameco, Ameritron. Antenna Specialist, ARRU Astatic. Asuon, B k. Belclon, Bencher. Bind, Buttemul, CES Cushcraft, Daiwa, Elmac. Henry, HeiL Hustler. Hy-Gain, icom. KLM. Kantronics, Kenwood, Larsen. Maxon, MFJr Mirage, Motorola. Nye, Palomar, RF Products Shure, Standard, TUBES, Unlden, Yaesu, VtbrotlexN Duple*ersn Repealers, Scanners, Radio Publica lions WE HOW STOCK COMMERCIAL COMMUNICATIONS SYSTEMS HAM DEALER INQUIRES INVITED PHONE IN YOUR ORDER & BE REIMBURSED...

Am

This is one of the earliest modes, yet still one of the most complex. The modulating signal changes the strength of the earner Seems simple, right At first, thai appeared all there was to it. After a short time, it became clear that much more was going on. The concept of sidebands, in which the modulation appears in mirror images on either side of the carriers frequency, was not immediately believed. El took quite a bit of mathematical development, and significant measurement and observation,...

And

COMMUNICATION TECHNOLOGY MADE EASY NO SHORTCUTS > FULLY UNDERSTAND THE BASICS STEP-BY-STEP > BOOKS PACKED WITH DETAILS, EXPLANATIONS AND ILLUSTRATIONS EXCELLENT FOR SELF AND CLASSROOM STUDIES 2. Alternating Current and Transformers 3. Electronic Tubes and Power Supplies 4, Solid State Devices and Power Supplies 7. Propagation, Transmission Lines and Antennas 8. Amplitude and Phase Modulation * 1 TO 2 BOOKS S12.95 S1 -50 S& H (EACH) * 3 TO 5 BOOKS 11.95 + 81.00 S& H (EACH) * 6 OR MORE...

Antennas

METZ. Urtan UQDL IOX, TONNA Butter ut Muil-Ganfl SCAHKEBS AOR 900 . TK . 150C3. WQ. 2800. 300QA ICOM R-1, mw, H71A.R7 A. RTtOO. BTld , R900D TS-SOS' TS450S AT, -S OQ. T& -B50S, TM 24l AM4tArTfi-751 A Kenwood Service Rep ir, TS1 S. T& 690S, RZ-1, TS-790A, TS950SD, TH-78A, TH3B 4AA, TM-941 A. TM-741A, TM-732A, TM-641A, TM-742A. Save money on batteries Ask for Special Prices. MARINE RADIOS 1COUM7 MM M56 M700TY Vf3Q0 AVIATION POflTA E iCOW A t MOTOROLA...

Arj Khz To Mhz With

A J 000 Channel Scanner with 500KHz to 1300 MHz coverage. & no cutouts 10 search. 10 scan banks lockout on search & search& store. VFO tuning with AM FM WFM modes. With Ni-Cad batteries. Chgr, VHF Ant., and long wire antenna, case & belt dip Limited time offer, not valid with any other specials. Only 5.95 shipping & handling anywhere in the 48 states. Call toll free and order this new unitf Sell your product in 73 Amateur Radio Today Call Dan Harper today. . ....

Aug

DOYLESTOWN, PA The Wyndmoor AR Repeater Club of Doyiestown will meet at the Doylestown Township BIdg, Commun -ly Room on Wells Road, al 7 30 PM. Interested persons may call Bob Agans, (215) 348-7966. The CEub features speakers and videotapes on topics concerning amateur radio, and ihey get together to study for license tests elc. They often schedule weekend excursions to ham radio events

Barry International

Monday-Friday 9 AM to 6 00 P M Saturday 10- 5pTn Sunday 11- 2pn RT LEX-+,Spring St, Station. Subways BMT-Prince SL Staiion, IND-F Train-Bwy Stalin Bus Broadway 6 to Spring St Path*9th St. 6th Ave. Station COMMERCIAL RADIOS STOCKED fCOM. Motorola MAXONh Slandard Yaeso We se ve munict-parities. businesses, Ctv-i Defense, elc. Ponabfes. mobiles, bases, repeaters. .

Bible

Pk -J ft. -I t Uf am hK*t I r-.S. rturit pttt ' . -L 1 hdd r. wjiiing Mi Uni Can* Ifl a boni Ulf you fieed luil tiLiifUng si gnal pouCfV Call him l rtfi antf Ms flllri riir tj til uk wtnEh r e let) int I repeat a U* . tnd-1*0 te. 111*4*4 pidy to snywh*ra Su -m in apurfnwti Owl ot doomray 4iUcn Rlco-J to *Hndow cf r rvo h mtdt ncj h l tor bnjadsan so* iTMd nnboosts recepiori JTT - p*i BftC Typ jJ fldqe tfr+ti-i* um r KiftnO-CflltKl kl W _ The SERIOUS HF Mobile Antenna' _ The SERIOUS HF Mobile...

Bnb

Fast turn around. SOUTHERN TECHNOLGIES AMATEUR RADIO, 10715 SW 190th Street 9, Miami FL 33157. (305)233-3327. BNB295 KIT BUILDERS Announcing a NEW, SYNTHESIZED qrp Transmitter Transceiver, the ARK4. Get on the air for only 99.95F (Transmitter Kit only) Buy as little or as much as you wart Full Transceiver Kit w case only 199.95. One board, no wiring, top Quality components & RGB. GUARANTEED TO WORK. For info send SASE Call Write to order S & S ENGINEERING, 14102 Brown...

Bt

Full featured digital logic simulators. Allow you to test your deigns quickly and inexpensively without the need for sohisticated tesfl equipment. PULSAR can detect the equivalent of a picosecond glitch occurring once a week1 Runs on PC.'XT AT ZB6 3S6 486 with EGA or VGA displays. Powerful linear circuit simulators have full graphical output, handle R's.L's.C's. Bipolar Transistors. FET's, Op-Amp's, Tapped Transformers and Transmission Lines etc. Plots Input and Output Impedances. Gain, Phase...

Bulletin

7 he whai you say is what you get state SAT. 9-1 p,m, CLOSED SU N DA YS H O LID A YS Stan wonJim WBOMJY DarreU WD0GDF Jason KBCIUS Marty KBOJOW Tim WDOFKC David KA0JDN Stove Shipping Lorie Bookkoeping Sharon Receptionist L to R Jim Smith, President, with Stan Burghardt, founder fully reconditioned and guaranteed, We take trades. If we don t have what you want, get on our want list. our staff has been here at least 15 years. Stan's been here for 57 years, authorized Icom, Yaesu and Kenwood...

Butternut Electronics Co

P.0, Box 1234, Olmito, TX 76575 (210) 359-5711 P.O. BOX 60017 * Fort Myers, Florida 33906 General Communication * industry Marine VHF Scanners * Amateur Bands * Microprocessor Experimental Get your FREE 1994 Catalog CALL TOLL FREE 1'8QQ JAN-XTAL i warA * ' 1 - . . BJLL JjJ-

Cfrcle On Reader Service Card

WIREL SS CAfiU - IF TS - MMDS - Amafevr TV Urmh flfc Gun 5 AK - Tineabfc 55*Cii innef Dts Syrern St99 95 36-Cf rwel Disn Syitem 149 55 20-Chanrel D sh System 95 Of.', su CJ 3 & c Mwh -s Add 3) Ort Syriern PJL 0533 * Sc ttsJ , AI A52S UFEtTME IG02) 947-7700 (S3.0 Creoil all phone ordrs WARS A NT Y Maireft M - u tannent E pftH C C s Chwtt) Pncia

Chipswitch

Suite 132 Santa Rosa, CA 95409-4269 Write or ra H 707) 334451 for FKEE tularin All Ui WIREL SS CAfiU - IF TS - MMDS - Amafevr TV Urmh flfc Gun 5 AK - Tineabfc 55*Cii innef Dts Syrern St99 95 36-Cf rwel Disn Syitem 149 55 20-Chanrel D sh System 95 Of.', su CJ 3 & c Mwh -s Add 3)

Circle On Header Service Card

Wayne is mad as hell and he doesn't want you lo take it anymore- Fed up with the mes in Washington The mess in your state capital Po> e rty. crime, our fai I i ng schools Wayne Green has solutions. Clever solutions. Wayne Green's unique reasoning is intriguing even (Jctif htiuf. Whether you are horrified by his proposes or you embrace item. ii is impossible lo ignore the basic lesson he presents It is time to brinj logic not emotions in liejr on America's dilemmas. His spin on America in the...

Circle On Reader Service Card

Work all 7 I IF bands between 40 und 10 mclcrs Adjustable hei hl bclween 7 und 12' for use between floor an J ccilingn D ism wiles to Great for outdnnr use ulsn Top qualify cortstruciiurL -bright 6063-TH aluminum, Hbe lass center heavy-< lu*y BAW gciiirr coil, stainless steel hardwire- Wwti welt inside mosi build-ing , * AnieFmas are mpletc - use your own tumcr. Erartimatch, or L-network to mafch lo your transceiver * Uses short c unterpobc - no gruund needed, * Sets up and dismanilts easily...

Circle On Reaper Service Card

T Use up to 4 TAPR, KAM, MFJ, PacComm or PKB8 232 type TNCs in any combination simultaneously Multiple Connect Support, Logging Integrated Text Editor Viewer Binary File Transfers with CTiat ANSI Color Graphics Support Macros & User Definable Menus Selectable Fonts & Colors User Manual & 1 mb of Online Help 49.95 + 2,90 Shipping & Handling Fiorfda residents add sates tax. Please Send Check or Money Order and your Amateur Call Sign to Chuck Harrington Software, Inc. 1565 Brazilian...

Circle S On Reader Service Caro

Harlan Technologies 815-398-2683 5931 Alma Dr. - Rockford, Illinois 61108 Require* PC. VGA M0 I 4M 254 color . nd ru Blaster comp, curt SliirF'nB 3 - Guerreas HQ - Illinois trvUlcnl* ode tas Now send J fxJ rwwvi Slow Scatl TV Wfith TfOUr Sound-e I d stsr ctMT mlkbta Quod card tft FULL COLOR IT Now copy Siniv scan TV ln B4W), with your Sflund blaster compatible sound Card, pictures thill y*1 rfltoivet Saw m ,PCX Of ,VOC files. irs FUNEtt

Circlet On Reader Service Card

Weekly Co-Host, John Moore, NJ7E - Weekly DX Update With Lee Finkel, KY7M Tune in each week for national ham radio news, FCC news, weekly guests from the amateur radio community, ham trivia contests, prizes, listener call-in and more Sponsored in part by Radio City, Inc. and 73 Amateur Radio Today.

Cometantenos Stockes

Tefealione sc amBler* for celular aid regula* Pienes EIMAC t 3-500Z ( 572B, 6JS6C I 120Y7A& 6146B r BIRO attmeters & Elements In Stock ANTENNAS AFAA phsDollj. ANU. Artwru liiii. B*t 4 Hy-Gam Towers w tt be shipped direel to you FREE o shipping cast MIRAGE RFC Amplifiers ASTRON POWER SUPPLIES Befden Wire & Cable, Infl Wire OPTO KEYERS STOCKED JRC Short-wave radios JST135, NRD-535D MAIL ALL ORDERS TO BARRY ELECTRONICS CORP., 512 BROADWAY, NEW YORK CITY, NY 10012 ifour blocks northofcanal...

Corporation

Baseband refers to the original modulating signal, before it is impressed on something else. CWClt 22 ON READER SERVICE CARD CIRCLE 49 ON READER SERVICE CARD 73 Amateur Radio Today July, 1994 69 Amie Johnson N1BAC 43 Old Homestead Hwy. N,Swanzey NH 03431 Before f started the column thts month. I just had to reread the report from the Peter1 DXpedition written by Peter ON6TT. He has Such a great sense of humor spread throughout the report, t just wish that we had the space to print it ait....

Cw Wolfe Communications

Wta oukl H iki in tfti* cunto I rx*U tJv utHpnna hn jrtJ lIv'whip in imfkViu liiih a cOfUk-d 141 OjiU Uk TV in ihp ik i Ctvncfci tv jJ'J rnc K luiti wilh jn OftHnril.h nif fifj hioj p hfl> nn-4 W.JS Li Lictp NnJ in i EfXfiHirk' up thxt< > I ivSufvrBcvHJ HtVTi jfl ihc iv ivNNii tTf btHW. lod iyt fi CM SnwVm nuiiirJiiihru Ui i VU 211m -UJiti S '> 75 or 80m SW J im Si 39 Bo* 50062 Ptovo UT J60S HOtlllie J f

Data Cntlr

The PC-1610 has too many features to adequately describe in one ad call or write for a detailed brochure Major Credit Cards Accepted. Designed and manufactured in the U.S.A. Phone (516) 862-6512 Fax (516) 8627 Flowerfield Ml OO, St. James NY 11780 As with most counters, you can select the gate time of the counter* You can select between 10k, 1k. 100. 10, or 1 Hertz resolution. A multi-pole rotary switch mounted directly on the PC board selects the gate time. There are no interconnecting wires...

Down East Microwave

ME 04967-9721 USA Phone (2071948 37 1 Fa* (207)948-5157 U.S. and In lernattonal Callsign Lookup ttenrly i.000.000 Listings Thousands of Public Domain Programa Hg Ca Includes Clubs & M ltaiy S ll 50, + 5 Shipping & Handling per Order fr y Works on PC and Mac Buckmastert HamCall CD-ROM looks up calla In seconds. U S. calls, can be search* by any element, including name* city, state, etc. A TSR is included to look up cullstgns from aim' st my leu...

Dr

Listings are free of charge as space permits. Please send us your Special Event two months in advance of the issue you want it to appear in. For example, if you want it to appear in the January issue, we should receive it by October 3h provide a clear concise summary of the essential details about your Special Event. Check Special Events File Area 11 on our BBS (603-924-9343). for listings that w& re loo late to get into publication.

Every Issue Of

73 Amateur RadioToday on Microfiche The entire run of 73 from Octobcr, 1960 through last year is available. You can have access to the treasures of 73 without several hundred issues. Our pages each and will fit in a card file on your desk. We offer a battery operated hand held viewer for 575, and a desk model for S260. Libraries have these readers. The collection of over 600 microfi che, is available as an entire set, (no partial sets) for 285 plus 5 shipping (USA), Annual updates available for...

Expandable Repfater System

Standard and Computerized Controllers Standard and Computerized Auto Patches A NEW CONCEPT IN REPEATER DESIGN. THE Mi Pro E IS AN EXPANDABLE REPEATER WITH THE FOLLOWING FEATURES A BASIC REPEATER WHICH WOULD INCLUDE A COMPLETE RECEIVER, TRANSMITTER. COR. FRONT PANEL CONTROLS AND INDICATORS, LOCAL SPEAKER AND MIC JACK AND CAPABLE OF FUTURE EXPANSION ALL HOUSED IN AN EXTREMELY RUGGED. ENCLOSED, 19 INCH RACK MQUNTABLE CABINET. THIS SYSTEM CAN BE EXPANDED AT TIME OF PURCHASE OR CAN BE AN...

Fm

Is it possible to clip an FM transmitted In theory, no. After alt. we're just wiggling a carrier's frequency back and forth, so there should be no limit as lo how wide we make it. In practice, though, the circuit stages have bandwidth limits. When we deviate the signal far enough to run into those, Ihey will begin to cut the signal off as it ap proaches the outside points Tne result is an AMnng* of the signal as its Strength goes up and down, along with AM-like splatter and distortion. The FM...

Funkit Antennas

INTRO DUC I NO THE TWlN-LEAD WINDHAM FOR 60 -10 M BANDS INCL. WARC BANDS. WINtXTM HEAVY DUTY RUBBER MOUNTED TWlN-LEAf ANTENKA WIRE SUPPORT I34rf41 u) LONG. COMPLETE WITH 5-0i 17 M) FEED LINE OTHER LENGTHS AVAIL USE WITH t 4 EJALUN (NOT INCL j OR TUNER AJ*09TV I*-LEAD WINDMAU ____________SM.9S AT-51 1 4 BALUN HATCHES 500 TO 200G (22 00 EASY TO ASSEMBLE TtVUTQ LOlGTii 4 ADO COAX r ALF TH StZE OF A DlPOLE NEEDS NC rUNER MAX PWR 700 V, w n AH-Q1 100 METER ANTENNA 30 95 AN-02 30 METER ANTENNA fcM.tt...

Garantennas

UK 14 MAFLEWARD ROAD THUNDER iiA ONTARIO lJ7li 5K5 ANTENNAS FOR VHP DIRECTION FINDING, USES ANY FM XCVR, COMPASS GIVES DIRECTION. ARMS FOLD FOR STORAGE. TYPE VF-142 COVERS BOTH 2-MTRS & 220MHZ. OTHER MODELS AVAILABLE. WRITE OR CALL FOR MORE INFO. SHIPPING & TYPE VF-142 > ADD TAX) 139.95 619-RADIO ENGINEERS -1319

Get The Atv

Made in USA Value + Duality 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 the 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. wilh one xtal on 439.25, 434.0 or 426,25 MHz...

Hamsure

Stoesser & Vazzando Ltd, 800-443-6242 708 - 349-0514 UHF & VHF Anlenna Power Divider Kits Tower Mounted Box Kits Dipote Hangers Other enclosures Charles Byens K3IWK 5120 Harmony Grove Road, Dover, PA 17315 Phone 717-292-4901 Between 6PM and * 30PM EST. Era. Distributorship Available'

Hamtronics

Hamtronics has announced the new COR-6 module a voice ID repeater controller combining COR circuits and a real-voice ID on one board, It can be used with transmitter and receiver modules to make a simple, low-cost repeater, A digital IC records up to 20 seconds of your voice, using audio from the repeater receiver The unit includes tail and time-out timers, courtesy beep, and a solid-state relay to key the transmitter. The kit price is 99, or the unit is avaifabEe wired and tested for 149. A...

Henry Allen Wbtyd Tina Allen

FOLDS TO ALLOW DOORS TO OPEN FOR MINI VANS AND UTlLfTY VEHICLES BOLTS TO TRAILER HfTCH OR FLAT PLATE SUPPORTS LARGE HF MOBILE ANTENNAS NON FOLD OVER MODEL ALSO AVAILABLE FOLDS TO ALLOW DOORS TO OPEN FOR MINI VANS AND UTlLfTY VEHICLES BOLTS TO TRAILER HfTCH OR FLAT PLATE SUPPORTS LARGE HF MOBILE ANTENNAS NON FOLD OVER MODEL ALSO AVAILABLE Sell your product in 73 Amateur Radio Today Call Dan Harper today 1-800-274-7373 Ever wish you had a radar gun in your car

High Power Rf Switched Preamps

Model 146160W 2 Meters 19doGain 75dbNf Model 1460S 1GDW 2 Meters 19db Gain .75db Nf Model 440 70cm 100W 16db Gain .75db Nf A i prearnps have helical fillers to preveni oui of band intermodulation in Ihe receiver. Modef 146 covers the eruire 2 meter band Modet 1460S is of very narrow bandwidlh and would be suitable for SSB Packet, or Satellite, Model 440 is factory tunable from 430-440 MHz or 440-450 MHz per customer request. Alt models are powered with 13 to 20 VDC and are mounted at the...

Hvsm

11 5 Feste1 h-tlFi quality co r Gold-plated UHF Conns, roi Ar- ertnas uy to 40' in igFir Cable Assembly 13 Feel doubte shielded very tow loss ioax 113' RG-1SS teflon coa.< Gtnrr plated UHF (PL-25 '30 239i connectors James W. Searcy WA5WRE, Poplarville MS In July of 1992 there was an amateur in Picayune,, Mississippi, who came up on tie local repealer there and used alt kinds of four-letter words, complaining about a woman driver cutting him off in traffic. As he was spouting off over the air,...

Icta

Dual Band Receive Capability - Permits reception of another bund (Le. 440 MHz on the IC-T21A). Ful Gossband Duplex Operation - Possible uiih the unique whisper modeh microphone (standard) for telephone type QSO s+ 6 Priority Watch Modes - Check for other signals while operating on a VKJ frequency. Ultra-Convenient Repeater Operations Sttbaudible Tone Scan - Detects, displays and programs the tone frequency into the TO, Permits access to a repeater when you don't know the tone frequency, Auto...

Info

1COM R1J ultra compact handheld widebuid receiver ICOM Ati'DOOJ niprr Jrhind ducow tntenn Cruni Nullit DOJ portable mil y 12 twmun A AC tdipL _ Grantig Yft t B v 400J Grundy idit Boy ZW t*> n*hk ibortin sinpnri ts202 j uhn ( mipict 20 memory shwtwn Sin m ATWto-J Ira ctrnqna Hi S menjocr shonwtre. Sutgean A'rstfl6P iliort t mth anl nni AC Capter San rvi A7 800J portib> 20 iMmnry stortwrvie Sanjican ATSS03A-J portiMc with SSB reception 4 AC adapter ftuiRrvi ATS808-J pomhJe 45 niirmory...

J

* Effective- required protection for interconnected or networked equipment Reliable- non-sacrificial design + Safe-Uses no MOVs Award winning Series Mode technology eliminates the desrructve energy oi surge voltage and surge carrent Call or write for full details Today, Ask about youf ham operator dub discount 944 State Rt 12 Frenchtown NJ 08825 300-996-6696 FAX (908) 996-7773 Andy MacAlffstsr WA5ZS9 147U Knights Way Drive Houston TX 77083-5640 Digital communication via the amateur-radio...

Lvg

2 - 560 pF + 1 * 470 pF 1 - 680 pF + 1 - 270 pF Ftgure 3. High-pass filter (1.900 kHz) for AM BOB suppression. ihough the number of turns may prove excessive for some of us to wind The particular pattern, however, is for a Toko-brand slug-tuned coil. In the Digi-Key catalog, these are Ihe 10 mm size coils (e.g. 10EZ1 10E2C, 10EZH, etc.). For example a Digi-Key cat, no, TK-1223 is a 220 mH type 10EZ C0iL The alternate approach is to use a high-pass filter between the antenna and the receiver...

Jnos

Following information to the ARP table i4.i8.70.22 the host ID of the station for the entry (this could be alphanumeric e.g. N1EWO if you have the appropriate entry in your DOMAIN.TXT file) ax25 tells JNOS to use the ax25 hardware layer n 1 e wo th e h a rd ware add ress of the station for this entry dsp the name of the interface Now, when you attempt to connect to 44.48.70.22, this ARP entry will be used. So, we're halfway to the solution JNOS will now use the correct hardware address for...

JULY

BALTIMORE, MD The Maryland Hanv fest Computer Fest will be held ai Timonl-um Fairgrounds on York Rd. Set-up 2 PM Sat, July 9th. Tailgating area opens at 6 AM Sun July 101h buildings open at 8 AM VE Exams will be given at 0 AM only Pre-re gist rat ion is required. Call Les Mc-Our& WSGXT. (410) 833-8667 to pre-neg-isjer. Talk-in Will be on 147.03 and 224.96 MHz Rplrs. For Hamfest Info, call (410) 467-4634 or write BRATS Hamfest, P.O. Box 5915, Baltimore MD 21208. PITTSBURGH, PA The 9th annual...

Jurassic Repeater

Add A Di iuil Voice Messaging .System To Your Repeater JJ Leave Voice Messages For Each Other Gel Packet Cluster Info In Voice Schedule Voice Announcements Computer Board And Software 259 Call Toll Free For J nib Package 1 -8HM6.V5 1 Toll Free From USA General Delivery. Pilot 9utteH SKh Canada SOG 3Z0 Photo A. Left 10 fight Renee KB2QMR, Mrs Hoehn, Carole WB2MGP, and Lori KA2TCC (Carole's daughter), early in the morning at the launch site.

Kachina Communications Dealer

W*je selection o'SWi Amateur DEALER STOCKED Publications _ _ -p. RF Concepts Shortwave Radios StockedTE S*sterns DIGITAL FREQUENCY WINTERS OPTOELECTRONICS mo e T300 H A. 0-1300MHz 2300, 2210 H, 0-2200 MHz, 2600H, UTC-3000.28fQ Telephone for export in stock Hal * ALJNCO DJ580T, 120T, 162T, 460Tt 180T, F1TH, DR570T, etc

Kangaroo Tabor Software

Kangaroo Tabor Software has announced the new CARMAN 2.0 computer-assisted prediction manger This is a professional-quality IQNCAP package that allows anyone to use the most advanced propagation routine interfacing with the ELNEC and MENINEC antenna anatysis gain patterns. CAPMAN is the versatile menu-driven skyway analysis package developed by Kangaroo Tabor Software and the prime author of IONCAP. CAPMAN delivers IONCAP input file construction and management, two integrated execute functions...

LM

Figure 1 Modification to correct low audio gain in some MFJ QRP Rigs, Mtchaei Bryce WB3VGE 2225 Mayflower NW MassHion OH 44646 If the DX Is not running and the bands seem dead, what do you do Well, you could do like Scot N8JSK does and raise aphids, or you couid heat up the soldering iron and make some modifications to your equip men l. This month i've got several modifications for you. The first deals with the very popular MFJ QRP rigs. The first production run of these nifty iittie hgs...

Log Ib

Output signal when the oscillator is frequency modulated. Figure S, if the oscillator isphu ed further from the parabola than the focal length, if iHumiliates the dish more evenly. Figure 9. Output signal when the oscillator is frequency modulated. BEF ,0 dBm ATTEN 10 dB -17.S3 dBm

MODEL

938 Tiny Switching Supply (Only 3 lbs ) ti& 5 Dolly Partem Partway Sevicrvriire, TN 37B& 2 USA Office (SIS) 453-7172 Fax 4615) RefHir Dept ( T5) SSB ond CW 50 Wotts Output Adjustable To 5 Watts Runs Off 12-U VDC TX -10 Amps, RX -.6 Amps Built-in farnbic Keyer with Legendary Q3K. Speed adiuste on front and shown in display. len I began working with video eir-clmis, one of the first things 1 learned is that you cannot jusl feed a video signal into an oscilloscope and expect 10 see anything...

More

Ir new WORLDWIDE RADIO tflAS wilt help moke your IQSO's more fun and interesting. When you talk to an overseas ham you wiil I know more about his country* Includes radio and fographicai information fof lover 320 countries. More than 325_pages' _ _ _ a Our quality Repeater Mops are now avcrikible in book form Thafs right, ov now book includes al U.S. Stertes, ait Canadian Provinces, Mexico. Central Amenco and Ihe Caribbean Maps show city location, repeaters, highways, ham dealers, and tourist...

Mt Bruno Age Ave San Diego Ca

World's Smallest 10 GHZ ATV Transmitter Figure 4. For PI FF. the oscillator is an amplifier nil h two pairs of coup fed Unes connected end-it t-end* ariij . ami B lengths were tried, with the ov erall length .4 + B remaining Kt2. reached. This is whcti radiation efficiency is ut ils best. This principle is not new to us Yjgi antenna elements are also about X 2 long (Figure 2) and they are particularly efficient when it comes 10 radiating energy from ou transmitter Radiation from mtcrastrip...

Ncg

1 Number One Systems Ltd 68 102 ONV Safety 172 * PC. P.C. 321 68 Controller B-k-ft p i --B---------------- MU pa-.--aaa-. 71 249 Phillips Industries, Inc 85 311 Pioneer Hili Software t_ 57 49 Polyp 257 Quorum Communications 27 153 Radio 58 Radio * Radio RAI 34 Ramsey * i i in TP P i a b a 1 p h + -fc BSP P m-m-w-w rmmtrm i i i k I l-rii- 254 Ross t b a. m.a j. j .a._- j. -----il----- 4- -' 50

No Compromise Communications

BOX 3526 BELLEVUE, WA 98009 TEL. (206) 746-6310 FAX (206) 746-6384 Figure 3. Deiayed-trigg er ci rem i schematic. Figure 3. Deiayed-trigg er ci rem i schematic. U2 as the clock tor a divide-by-two circuit formed by U3a. Each vertical sync pulse causes ihe output of U3a to change state. The result is a square wave that goes high once pci ideo frame and can be used as the iris er for the final delav circuit The delay circuit is composed of a one-shot timer made up of...

Optional

OPl ON HST-15 fs a high accuracy, high stability, time base upgrade that can be ordered with any ATH series model (0.2PPM TCXO 100, Extend readability distance with B HHP PASS I FILTERS, 49 ea. LP-60 DC - 60 MHZ BP-150 130-500 MHZ HP-400 400 - 1500 MHZ HP-600 800 - 2000 MHZ Terms Shipping handling charges tlS, & Canada 5 (5 5 m in., 10 max) Others add 15 , FL residents add 6 tax. COD fee 5 VISA, MC, Discover accepted. Prices & specifications subject to change wilhout notice or obligation.

Orders Call Orders Only

J_- t ec wo r e rflnfo 116)524*4 560 fa x (716)924-4555 TERMS Satisfaction guaranteed. Exam to for 10 dtys n Mt pfis d te rn in ongmel form tcr r*fumi Add 95 for shipping handing and inutm to* foreign orders 20x. (or 7 1 fj h surface coo hj.s flrvy jc 5 00 orders uider 20 atfel 3 00 ny rc iden > dci ti jjb utot lax 90-ctay parts varrjnry on kit pails 1-year parts 4 labor warranty on h red unit* RAMSEY ELECTRONICS, INC 793 CANNING PARKWAY VICTOR NY 14564 A simple 20-10 meter antenna with an...

Pc Electronics

Not suitable for hunting a fox on an enact 1 MHz multiple (such as 147.000 MHz), due to QRM from harmonics of the oscillator The harmonics are strongest at minimum attenuation setting. They were luii scate on 2 meters in my mobile setup, and half to three* quarter scale on the 222 and 440 MHz bands. However wrth extra care in adjusting the attenuation control was still able to get bearings on a strong test signal on 147.000 MHz. LO harmonics are a problem when an even-megahertz fox signal is...

Philippines

First, thanks for the many fetters from the readers of this column. 1 enjoy answering my mail but can' afford to answer letters without an S A S,E I already have a ot ot BURO QSLs to answer for IOTA GC-129, and also many direct cards without SAS.E s, which I have no choice but to return via BURO, This month I decided lo bring our readers up to date with the additional guidelines for the renewal of an amateur radio license and application for amateur radio examination. 1. Renewat of Licenses 1)...

Po Box Upper Marlboro Md

I connected aboul +5 dB i 2.555 GHz to the multiplier inpui and tried to observe output at 10,5 GHz, me 4th multiple. I cheated and used a bench oscillator for this relumng test and noi the modified synthesizer (versatility and test control) I connected a power meler to the output and found almost nothing for power oui (fess than -20 dBm). I started o lune he pipe cap filter (inserting ihe screw ,nto cavity), and as did the power increased. I tuned the ( iter for...

Qrx

The Federal Communications Commission has acted on ftR Docket 93-85 and has relaxed the Amateur Service rules to enable contemporary message forwarding systems to operate at hundreds of characters per second while retaining safeguards to prevent misuse. A message forwarding system is a group of amateur stations participating in a voluntary, cooperative, interactive arrangement where communications from the control operator of an originating station are transmitted to one or more destination...

Rb

Trunk Lip & r HalCtl & ack Mount Rubber-caateii tiase protects veMcle nainr 3D 4M Standard Cable Assenbly 13.5 feet r F kr,v -'-uu Go'd piated UHF (PL'25 SO-23Sj cortwcior 3D5M Standard C-abte Assem y Sam ss 30411 bul 17 Fwt aFcaai 1.3-ISOWH Otiffl EOQa P P 400-540MH2 0.2d6. MP P b laticp t -i C0NN CT0nS 41M PC 416CI 416fu Ou iwr S 239 SO 3 Low In Pt-259 PL-259 SO-239 Hioti m. PL-259 H'Male SO-239

Reviews

Load your marine GPS receiver with highway maps and know where you're goingf Turn to page W (Photo by Gordon West WB6NOA) It's like being there right here in our offices How Just take advantage ol our FEEDBACK card on page 17. You'll notice a feedback number at rhe beginning of each arttcte and ccHumri, We d jke you to rate wtiat you read so that we car print what types of things you like best. And then we will draw one Feedback card each month tor a free subscription to 73. On the cover Hit...

Rf In

Figure 2 Microwave splitter amplifier PC board diagram Note the local oscillator mixer drive amplifiers, this PC board uses four MGF-1302 FETs. The duat-slage amp has been cut from the main board and readjusted lo 10 GHz, receive and the other for transmit. Two additional amplifiers are located in the transmit path, and there is one in the receiver path These ampliliers have been removed from this PC board by cutting the board and making two 10 GHz amplifiers a two-stage and a single-stage...

S

Capacitors played. There is no way to determine which field will be displayed when you turn the circuit on. bin you can always gtjL to the one you want, For those people who are familiar with the LM1881, you may wonder why I didn't lake advantage oi some of lis other features (e.g., the even odd field indicator . It hiii been m experience that in order to fully utilize these features, the video signal being examined should Unfortunately, Figure 5. PC board...

Scrambling News

1552 Herlei Ave M23, Buffalo NV 14216 Vuice FAAF3S-71& B74 Q8fl C O D i are OK Aid 56 Thei i-' O & u lef-T *lcd QttV PbwerSuppI) ktepsyvul rtpciirr t rtft the Hit he clwllh L.T fn. prui IHK* KJr stauen 60 hr j ruunth. CnrUm) t irinitt fcpttd* itiiifge. pfuicti* f l Ctllsft tqlcd twHcn F nllv HVM.-Iiihlid, QRV , x iuhlr I . ily e gilded .1

Sell Your Product In Magazine Call Dan Harper

Farms around and seal , odd-shaped fittings Non-contamina irg and non-conductiva, Stays llesible lor years Insuring rnoislu re-proof connections. Reusable quick disconnection and repealing wltti s me material. A must for satellite TV-microwave work. Hundreds of uses, Uoisturepfoofs all connections* jrpawUfl* n.n i*J il SiT loifpiy flames c* oF plaide. Wrap lo cover wrapping, mou b lorn > olh igrto* find lorce out a-r jrpawUfl* n.n i*J il SiT loifpiy flames c* oF plaide. Wrap lo cover...

Servicemonitorswanted

IT'S SACK1 The return o the HW-e HandDooK Second printing. Modifications for the Heath QflP rigs. First class mail 11, DX add 4 for air mail shipping, Mike Bryce, WBBVGE, 2225 Mayflower NW, Massillon OH 44647, BNB404 patented 1872) by Thomas Appleby. (Copyright 1967), Available from JOHAN K+V. SVANHOLM, N3RF, SVANHOLM RESEARCH LABORATORIES, P.O. Box 81H Washington DC 20044. Please send 25.00 donation with 5.00 for S& Ht BROWNIES QSL CARDS SINCE 1939. CataJog...

Si

Posl Office Box 1084, Dept. S Concord, Mass. U1742. U.S.A. Phone (50a) 263-2145 Fai (506) Z63-7D0B YeS.*. the answer Is GAPS revolutionary technology. T **t GA* UCHNOLO iVt HE AMS I*C*p T(CH iOlOt> YeS.*. the answer Is GAPS revolutionary technology. it you're DOking for in a tei> -ra that un out perform he fterc and qivp you l he tsge. you 're toeing iot a G*F. ive CraJlenoBf DX-Vffl is the revoLtitiOffvarv titjl option iia unequ Kl efficiency tth rw e Thrs s...

Special Combination Offer

For a limited time t' yau ordoF PC HF ax 3v99 see our other ad ths ssufi). you can acid our new arc mproved PC SWL 3 0 for SBC 0C instead Crf Otf* regular low cmc* of 539 GO PC SWL ccnrau-is Hardware scirware - . cTtyts a s i lj needed ai w OJ 10 i-eceve a digital lyoidcasis cansm reLi ovf-r shortwavu radro. AH you need is any IBM PC or compatible computer iirid an SSB shortwave receiver The product conSiSte of Demodulator Qjgital Signal Processing Software 200 Page Tutorial Hcredence Manual...

Special Features

* SOLID STATE ELECTRONICALLY REGULATED * FOLD-BACK CURRENT LIMITING Protects PtowerSupply from eKcessjve currefii 5 continuous shorted Output * CROWBAR OVER VOLTAGE PROTECTION on all Models except RS 3A AS-4A RS SA RS4L BS -5L * MAINTAIN REGULATION & LOW RIPPLE at low fine tnput Voltage * HEAVY DUTY HEAT SINK * CHASSIS MOUNT RJSE * THREE CONDUCTOR POWER CORO except for RS-3A * ONE YEAR WARRANTY - MADE IN U.S.A.

Specifications Pcsh Az

Frequencies RX 46 MHz 46-54 MHz TO PLACE ORDERS mi m_ n 5W< yHz 50 54 CALL 1 '800-643-7655 Pmr 505 Wals SU 5 Wats UALL 1 _L 0 _ Kl Sensitivity < 0.T9 < 0 16 jV f O 1 S for 12 SISAS for 2 dB SIKAD Byl rm OC Power 3SvOC4 -UvOC PCS-75 0f mPBILE M OTps W IS amps (typ) ' ' Size r 5.5m25HD e.arHx rWxU'D 147 New Hyde PaiK Ra. Franklin Sq MV T1Q1D (516) 8-7501 FAX (510)326-7506 A compact, low impedance, end-fed HF antenna that needs no tuner The end-fed RASER antenna described in 73 Amateur Radio...

Spy On The Earth

See live on your PC what satellites in orbit see Capture five breathtaking images of the Earih tor fun or profit with our SpySat software and hardware package that does it atl. Track, capture, display, zoom and analyze images direcry from 6 or nore environmental saie, 'tes. Ccnnplete Earch s at> on package indudas antena. IN A, & ate iie receiver, demodulator, AD cor verier and so are. all for only 399 pius 525 sr a> ig. For FREE informa r tog-on to 3ur bullei'n anytime at (718 740-39....

Ssb

Sideband, which is a special form Of AM. suffers from the same problems when overdriven. But how can we cirp a earner when there isn'i one Well, remember that we are generating an RF signal and then making it cancel itseli out in the modulator The object is lo create sidebands, one of which we then throw away and the other of which we send on to the antenna. If we clip the modulator It generates the same kinds of false sidebands we'd gel with AMT and we wind up sending those on one Side Of...

Standard Sortes

5-1 i 2 sun*- S-i tt 4 .I n s s i ses Kh ll Lu WH (* CKT TV S tfnV& fqHvty 3 - il. ilD fc-Y Optnftn m C Hiipi t* SeNntifc VbJra E. l , t FrequBiKf iflr'encpi flispljv-d on C8 ihm th* Ltso of cursor (S 365 only , S-133025UHJ SAW S 13iS40 HjS575 SrT360 0 JfrV S77 Taisait ht IsiJurii of m -oi' raiDi-g' se - e& 2T6C (Hi duMi Tracs Deiayn) S m M 4 D rl Hlii iTEl& f I BK-390

Tha

MOS FET final amplifier and DSP for superior linearity, 150 watts output * All-band HF transceiver with general coverage receiver Swilchabie AGCr selectable IF fitters with memory, dualmode noise blankers, IF notch filter, CW reverse mode. CW pitch, SSB slope tuning, IF and Af variable bandwidth tuning * Built-in CW memory keyer (DRU-2 voice keyer optional) All-band HF transceiver with general coverage receiver, 100 watts* SSB slope tuning, CW variable pitch and...

Tha Ft

Satellite telephone in suitcase for worldwide use. WRITE. KAM PLUS. KPC 2WA. KPC2JDO. SUPEflFAX ( KPC IV Dab Engir* REPEATERS STOCKED. WfliTEFOP UOTES tennajTuiiBrs MFJ, AEA AT-3 0, tCOM. KENWOOD YAESU Computer interfaces Stacked MFJ-127CB, MFJ't274, MFJ1224. A A L PK-68, MFJ-1278 . PK-9Q , PK-232 MBX W FAX. DRSI PRODUCTS DSP 2233 Radios for Business, Gov't, 2-way, etc. Stocked & Serviced,

The Famed Meter

Also the ultimate for scanners beb to 1300 MHz. +9 db Co-Linear MultiWave11 Base Station Double 5 8 over 1 4 wave delivers up to +9 db gam. All fiberglass 8l solid aluminum construction. Fits masts up to 1-1 2. 2 Meter Base Station 10' length. SC RES 5 SALES TAX) CHECK IN ADVANCE OR C O O. ALSO AVAILABLE IN 220 4 Q Semce iM flwior Far Ouf Socc iT Walls 1 Myrt-fl 5iitn , SC 295 3D - ANIMATED VIDEO CALL SIGNS FOR ATV Best prices Broadcast quality * Makes you look like NBC Custom designed for your...

The Global

The NAVSTAR Global Positioning System. generally called GPS, is a satellite radio positioning network providing erv accurate position* velocity, and time information. Although GPSt developed by the L S, Department of Defense (DOD), can provide three-dimensional position, velocity determination, and precision time transfer. position information is the most sought. Plans call for GPS to be the DOD's primary means of radionavigation. The system is capable of serving an unlimited number of users...

The Ham Contact

PO Box 3624, Dept 73 Long Beach, CA 90803 CA Reigern Add ei Sjk* T AitoM and Cinaajr Res deris please se d U 5 Money Oder Ii ya J wish rn0ra .rienirt on o ease send a SA5E so the above sddress Per COD ordefs. ca i 310OiJt e tJ C Orders Only t (800)933-HAM4 and leave a message.

The Power Station

The POWER STATION is a 12V x 6.5 AmpHr gel-ceil oattery complete with voltmeter, wall charger and a cord for charging via automobiles. It wili power most HT's at 5 Watts for 2-4 weeks (depending upon how long-winded you are). Also VHF, UHF. QRP. or HP mobiles such as the KENWOOD TS-50 (at SOW). There are no hidden costs, all you need is your mobile. HT power cord or cigarette lighter adapter. The POWER STATION provides 12V from a cigarette plug and has two recessed terminals for hardwiring. A...

This Month S Goodie From The Candy Store P

Stir Lar Savings on A a. icom, Asirori, caishtrari, AUnco. Eic an lt.q. wfj 9g9c 309 50 30CC. HIT .n Stock. * FOB P'tS. ' Utel* Se* lii 4 HAM AOS L or* For Sot t CaMat Wrte To save tine and money, have the model number ready ROSS distributing company 73 S. SI Jte Slrwl. PrcsTon, H. 03253 Hours Tug.-fri. -6 - g 1 Mnrujjys CiQSKl Sat A Sun rai.-Saif a fail ruft bom * Nu CMjujifli Of cue ELvwyihii* -lodcti Ftatsii Htnu4 i mLnuTpf

Transmitting Converters

T. * XV2 for vtrf & nd XV-i tof jht Models to convert 10M ssb cv fm etc to 2M 220. 222. 432, 435. and atv 1W output Kit only S89. PA s up 10 45W available * Bu at lo w, factory-direct net prices and save * For complete infa, call or write for free catalog. * Order by mail. faxt or phone M2 am, t-s pmtime) * Min. S5 S& H Charge ror first pi> un pfus adcl'J nveigrirA insuranr.c * Use VISA. Mastercard, check, or UPS C,O.D.

Trband Mobile Antennas

FL-G7S Dual-Band 146 446MH7 w fold-Over. Mo Ground Plane Required Gain & Wave VSWR Max Power Length Connexion H6MH 4.5dBi to wave 1.5 1 or less 150 watts 4 11' Gold Piated PL-259 446MHz 7.2dBi wave x 3 CX224 224MMO Tri fland 146 22Q 446MHz, w Foki-tVer No Ground Plane Reauired Gain A Wave VSWR Mm Power Length CoMedor waits 3' PL-259 or NMO Syte 220MHz 3.6dBi wave or less 446MR* fi.0dBi wave k 2 FL-62S Dual-Band 146 446MHi w Fold-Over, No Ground Plane Required Gain & Wave VSWR Max Power...

Uvocr

What is DSP DSP allows the construction* of various filters Of great complexity by using computer code. This allows us to have easy access to a variety of filters, each perfectly optimized for whatever mode we are operating. The DSP Jt has been designed to operate in 10 different modes. Four filters are optimized for reducing interference to 55B phone signals from CW. heterodynes and ranciom noise interference. Four more fiilers operate as brick-watt CW bandpass fitters. The remaining iwo...

1

The cross-polarization attenuation wlls mi her high, with a maximum of 30 dB. The lotal radiated power was estimated at about 1 niW Replacing the circuit under test with a Gunn transmitter of I mW known power output gave the same signal on our lest bench. We tried to further decrease C to 5mm. this sent the output power up about 3 dB and the drain current down to 11.4 m A. Oscilla-non -requeue went down to 10,180 Gltz, which allowed us to remove the two pieces Of copper foil we had...

Vox Controller

S913 EQUAL LTV RfStS'ANfT JACKET_ .4*1 Jftfl KVK 5HBLK0 CLftUV.A eT _ l& TT T4H RG-142B4J ML-SPEC UOfft 1.109 CtOflOSTB UV JACKE 1 ____ _HJ IM C4D9DHVir JACUtt SMl ttU - BGA HC GRAY JACKE' __________________ _______15ffl l ffi 1 SC 'flC iQHA y JACKET iBtf Mm I iGA 1 SB STfl Ll PBfl'FLEX IJNIN 1 GUtl 14flA SCUD HCOPPtflWEU> 1 UNDULATED ,07.'n i)n.n 1 3GA 19 3TK J LE XlBLE BC UNWSULATE D Tl ft 1 0 h W2A l.l OR A. SLN t HOUttrTW fTW __________ D 1 1 St* r OCMK'CflRWT US M T FLAPS HMO UTR U2...

VP

Mobile, too I couldn't afford an HF rig until now, 1 Frequency coverage RX 100 kHz-30 MHz TX 160-10 m 100 Memory Channels (Independent TX RX per memory) FM* Repeater Operation Automatic 10-Meter Repeater Offset w Selectable CTCSS Encode Choice of Two Optional Antenna Tuners FC-10 Matching External Antenna Tuner FC-8Q0 External Remote Antenna Tuner Contact your Dealer for full details. automatic 10-m FM (optional) repeater offcet with selectable CTCSS, Even two optional...

Write Or Call For Our Complete Catalog

Some cold fusion experiments have reportedly produced power densities higher than those of u ran turn- fueled lission reactors . . Experiments lhai use crack-free palladium and follow Ihe proper procedures now routinely produce heat, nuclear products, or both , . For cold fusion to occur, the palladium probably must transform into a special condition of matter, akin to superconductivity . . . None of trie proposed explanations for cold lusion accounts for the full range of experimental...

Electromagnetic Field Meter

Reduce exposure to potentially harmful electromagnetic fields. AlphaLab's handheld TriReld Meter measures AC etectric fields, AC magnelic fields and radio microwave power density. Find ground faults, AC current wires or measure high-field generators with ihe Magnelic setting (.2 - 100 miNigauss 60 H2) identify poorly grounded or shielded equipment, high VDT or fluorescent light fields, distinguish hot vs. ground wires with Elecrric setting (.5 - 100 kV rn 60 Hz) measure antenna radiation...

Z

First. the coupled lines A and 13 were chosen with ihe same low impedance. Low impedance means that they are broad, like a microstrip antenna patch. Dimension B+D+B should be equivalent to abom a half wavelength to maximize radiation. Second, to generate enough feedback tor oscillation lo occur, they were chosen with tiuhi coupling which means close to each other. Tins determines dimension D. Third, the overall electrical length of both lines pm end to end (A i was chosen at about X 2 to...

Circle On Header Service Carp

62 73 Amateur Radio Today * July, 1994 Photo S, The component p rts of the W4HTB repeater are assembled m Hank's final test facility. Photo S, The component p rts of the W4HTB repeater are assembled m Hank's final test facility. er and the transmitter using a TX-RX 26-66-01A dupiexer. The receive system consists of a PC. Electronics ATVR-4 receiver that delivers video to ihe video sw tch and sync detector circuit. The video ID and alternate video sources can be routed through the video switch...

The LDG Electronics FC

A small, flexible fox controller and CW IDer. LDG Electronics 1445 Parran Road St. Leonard MD 20685 Telephone (410) 586-2177 Price Class S69.95 plus S& H f you are a sertous foxhunter, you have probably tried putting together your own loxbox with timers, identifiers, etc. You have tried the different circuits using timing capacitor networks and different chips, and you have probably soldered in those countless diodes in that matrix for the IDer. Recently I tested the LDG Electronics...

Qmm

A NO-RADIAL VERTICAL THAT COVERS 80 OR 75 METERS No, we won't insult your intelligence by telling you that it's a ,Jhalfwave or that ANY vertical will operate more efficiently without a good radial system than with one it certainly won't) if you want expensive fairy tales talk to our competitors It, however, you've no room for even the smallest radial system just install the most efficient multiband vertical in the business, the HF9V-X, over our counterpoise kit. You'll not only save a tidy sum...

Hiyss

Gicba1 positioning system iGPSi receivers display latitude and longitude on their LCD or CRT screens. They also show SOG speed over ground , COG course over ground , speed, and distance o pre memorized evert or way point markers. The latitude and longitude numbers would lead to pos non accuracies of approximately 10 feet, bul the last significant number regu larly charges. Why the change This is because your position is purposely being diluted by the Department ot Defense GPS satellite system...

Ncg Companies

1275 North Brave Street Anaheim CA 92806 714 630-4541 FAX 714 630-7024 Mini spkr mic featuring full TX quality' Lighr wieigfrt. xtr amp mely email 1' T wilt collar poete dip m m Kenwootl VBTSion rt P2F icflmTaesiJ Mini spkr mic featuring full TX quality' Lighr wieigfrt. xtr amp mely email 1' T wilt collar poete dip m m Kenwootl VBTSion rt P2F icflmTaesiJ SH-55 Super Flexible l46.'446MHz HT Antenna Gain amp Wave Max Power Length i4GMH i.5dBi14 wave 10 watts 15.51 446MHz 3id i to wave 2 Gain it...

Custom Madehand Tooled

Feather products with your initials, name, call letters. Photos amp estimates available. Key rings, wallets, belts, purses, hanging signs, specialty items. GREAT GIFT. LEATHER amp WEST, 67 Causeway Rd West Swanzey NH 03469. 603 352-6256. 9-4 pm. M-F ET. BNB215 SELL NOG 15m QRP transceiver, used ittie, A1 condition, 200.00. S.v, Couch, 2029 JoAnn, Newton KS 67114. BNB220 OSL SAMPLES- 50 certs, SAM-CARDS, 48 Monte Carlo Dr., Pittsburgh PA 15239. BNB275 ATTENTJON HAMS Subscribe to 50 Worldwide for...

Awv

B 10 B 10NMO Dual-Band 146 446MHz, Cellular Look-3-like Gain amp Wave VSWR Max Power Length Connector 146MHz0dBi wave 1.5 1 or tess SOW FM 12' PL-259 or 446MHz 2 15dBi xh wave NMO styte B20 B-2ONMO Dui-Band 146 446MHz Cellular Appearance No Ground Plane Required Gain Wave VSWR Max Power Length 14Gtf Hz 2 i5dB 1i wave 1 5 1 or less 50 watts 30 446MHz SOdBi wave x2 -25 SB-25NMQ Mono-Band 146MHz w Fold-Over No Ground Plane Required Gain amp Wave VSWR Mai Power Length Connector 146MHz 4.1dBh wave...

Sopgoo

Make and receive phone calls from your mobile rig or handie-talkie with your own personal auto patch. Connection is easy just hook-up to the mike and speaker jacks on your base station rig and plug into the phone line Complete control is assured through touch-tone access codes that you set and change at wiit. Long distance toll access is controlled by speriat cotie that you set preventing fraudulent usage. All programmable codes and set-ups are stored in special non-volatile memory immune to...

Second Generation

Nexi genera Li on VOX controller with adj vox. sensitivilv. timers and CWiD Operate VOX with no internal connections lo your radios or COR for more demanding systems BC-21 w CWID amp enclosure 89,95 Add DTMF rml control, patch and outputs lo control other equipment lo Hie IiC-21. BC-2R adds nm cirl and patch. 79.95 DTMF decoder Boards for every netitl BTD-8C has 8 latched, rml loll-restriction, UTZ, IC sockets amp more 99.95 BTD-RM jix ninLary output . . 79.95 BTI3-8A 69 95 Qrig BC-1 . . 34.95...

ATV Transmitter

Build one on a PCB using only a few componentsI by Angel Vilaseca HB9SLV and Jean-Pierre Morel HB9RKR The availability of cheap surplus GaA -FETs lateh has made a lot of microwave experimenting possible for amateurs. This article describes a new kind of amateur 10 GHz low-power transmitter usins a surplus GaAsFET, mounted on a tiny piece of Teflon glass PCB. Wideband FM modulation is possible for ATV operation. As micro wave-oriented am incurs, we the authors began experimenting back in the...

Frequency Counter

Now you can count frequencies 'til your heart's content When S amp S Engineering sent me this fre-_ _ quency counter kit for review, gosh, did it bring back memories. My first home-brew frequency counter came to fife In the mid-708. Oh, those were the days Johnny Carson was king of fate-night TVt the Bay City Rollers were rocking Top 40 radio, and the USSR and the USA were sneering at each other. AEI you needed for a frequency counter back then was a VW bus full of TTL logic chips, 15 pounds of...