Circle On Reader Service Card

what elfect soil pH may have 011 grounding entrance panels are a last defense against lightning the facts & fallacies of oscilloscope sampling rates Making additional use of beacon signals. by D. R. Kuby Kubichek N6JSX Amateur Radio has set aside dedicated portions of various bands for radio beacons which typically broadcast the operator's caltsign in CW on a low-30wer omnidirectional antenna. A beacon's only recognized purpose is to evaluate radio wave propagation on a specific frequency...

And

Microphone, and so forth) becomes active, all but that one corresponding output become active, For my prototype, I used 4078 NOR gates and inverters (since we're dealing with positive logic) to simplify the wiring and to keep the parts count low (see Figure 4) The final requirement is an audio combiner, shown in Figure 5. I've noticed some audio distortion in certain transceivers if the audio gain (volume) is set too low therefore, 1 set the volumes of my transceivers at about the half-way...

U

Primed circuit board layout (FAR Circuits). and C1 b. The regenerative feedback for this oscillator is supplied by the output of the Gain Adjust pins of the LM1496, Some of the oscillator output is coupled to one of Uic Carrier Input pins via C9, which allows the mixer seel ion of U1 to act as asynchronous detector, greatly improving the RF detection sensitivity over that of other regenerative circuits. The regeneration level is controlled by the voltage level applied to the Bias pin...

M Aqlf

FOP LCTM COST CONSTRUCTION DE& GNED TO GET THE JOB DONE WITHOUT THE FFtlUSt FOP LCTM COST CONSTRUCTION DE& GNED TO GET THE JOB DONE WITHOUT THE FFtlUSt ENCLQ& Uni -REQUEST F FIEL cfjtjfiTnuCT n til* LOG ENCLQ& Uni -REQUEST F FIEL cfjtjfiTnuCT n til* LOG OH DE ft TO DA Yt ( 30.00 MINIMUM fiO R) PHit'tS i*ti.-LUDE IV J.OIV & l'YJAPWn A IR USA CANADA A MELXICO B OCCil QtF WOlUt

The Power Station

XThe POWER STATION is a 12V x 7 AmpHr gel-cell JL frgx, battery complete with voltmeter, wall Ciwger and a > cord for charging via automobiles. II will power most HT's at 5 Watts for 2-4 weeks (depending upon how long-winded you are). Afso VHF, UHF, QRP, or HF mobiles such as the KENWOOD TS-50 (at 50W). 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...

Info

I'hc KAM Plus offers more performance than any other TNC in its price range. It can operate any ol the popular HF modes (including the highly effective G-TOR mode) and VHF packet at the same time. The KAM Plus also provides more than 100K of personal mailbox space. And like other Kantromcs TNCs, its design is thoroughly contemporary the KAM Plus is small and uses very little power. It also features remote access, so all KAM Plus commands are available from a remote location.

Telex

Telex introduces its new Hy-Gain DX77 Advanced Vertical Windom with features surpassing any verticals on the market. It puts the ham world of 10 through 40 meters at your fingertips without the need for ground radial wires, and up to 1,000 watts of RF output. Automatic band switching and low angle of radiation allow for enhanced DX capabilities. The Hy-Gain DX77 features superior quality and reliable mechanical design, with double-wall tub ing, steel mast clamps, and all stainless steel...

Address

Have you ever wished for a physically small antenna tuner for your portable operations or maybe to build into your next rig Here is one that will fit the bill. There is nothing new about the circuit. This is the old familiar T match circuit that has been around for years, The feature that will catch your attention is that this design uses toroids for the inductors. Inductors wound on toroidal cores concentrate the field within the core. They also pack plenty of inductance into a small package....

Men H As

Kv-to-. iluftlt- KL M U lT7 U-bflr OQUHL , NN . SjTlflirul F3CLT.-40 Lt, WStjL ITA V S, W2 AT hjjfAT T JA 2A 2G*AT 4 XAT. W' AT t lAT TS-SOS TSJ-SUS'AT. R jflM TSflBiH, TV J4l.- 41A. TR-rSIn KfllwMm i urvlc P-ip-nr Tsuffl.Tsaaos w-ij s tooa. ts b sd H 7SA m. Trl& i' QA, TW-S41A M.74 TU.73& , TM- H I*. TM-7+fA. L W. IH7. Ml 1, Ma , M700TV M80Q, VIATIOH P fiTABL ICOM ASa. M T nClLA, TRITON MARINE L W. IH7. Ml 1, Ma , M700TV M80Q, VIATIOH P fiTABL ICOM ASa. M T nClLA,...

OCT

CONCORDIA, KS The Kansas-Nebraska ARC will operate Station W0IND to commemorate the 50th Anniversary of the closing of the German Prisoner of War camp near Concordia. The station will operate 1400 UTC-2000 UTC from the Airport Park during the ROW Camp celebration. W0IND will operate in the lower 25 kHz of the General phone portions of 80. 75, 40r 20, and 15m. along with packet on 145.01 MHz. For a QSL certificate, send QSL and large SASE ro Kansas-Nebraska ARCr c o Arian R. Campbell WONBT, Rt....

Elktronics

Periphex, Inc. * 300 Centre Street Holbrook, MA 02343 (617) 767-5516 ' (617) 76 7 4599 Camcorder itettcritt * Access ones * Cordless Phone Batteries Custom Battery Packs * NiCad Cells Lithium Cells rom the mumt a tum Buy the battery pack from Per where Batteries are our only b i f * i j Piug into savings when you choose Add HOt' ppittE & ptoffling for M battaj fjufo for eadtadditional battfo S iv MA rgjjgfaadd s In. Offered from October 1 through Ltombfi 1 .

K

Why settle for operation on just two bands The modern generation of dualhand radios has shown us the benefits and convenience of being able to operate on two VHF or UHF bands at once. But why limit yourself eo just two bands Here's a wa> to increase llie benefits, as well as the fun, of operating multiple VHF and UHF bands all ai once. To obtain a signal from a receiver that indicates a positive voltage (logic 1) when a signal is received, you can use the receive indicator (usually an LED),...

Satisfaction Guaranteed

5 Sheets for 4.95 10 Sheets only 6.95 Dept, J * PO Box 1555 Oneco, PL 34264 Fireq, Range nJ Sto 54 Mhz Pdwei Handling .J 1500 Watts SSB on Copper Coil-Q COi i a f + m m * f + B - Coil Coil Travel Time i c 60 sec. Coil Motor 20 irtfoz 430 RPM lbs inches inches J. Antenna Company1 or our a GO line q find out why jeai the corn etition Find oui wh.y we can money OMGES R COILJ 24.95 ey back guarontee and , We aeeept Mastercard, rfJ lr- ijg Learn at home in spare time. No costly school. No commuting...

BNB

ROBERT HALL ELECTRONICS, 1660 Mc-Kee Rd,, Suite A, San Jose CA 95116. (408)729-8200, BNB751 WANTED HAM EQUIPMENT AND RELATED ITEMS. Donate your excess gear, new-olcHrvany-condition to the Radio Club of Junior High School 22, the nation's only fulltime, nonprofit organization working to get ham radio into schools around the country as a teaching tool using our EDUCOM-Edu-cation Thru Communication-program. Send your radio to school. Your donated material will be...

Usa

Introducing irKits A new division of Ten-Tec Call 615-453-7172 to request your kit catalog 10 w u EtatirtSium pu im J is s of open 7 magazine. weighs lEh and delivers 6CH Im A Vir I2v charcing or direct opcruiiun. laudn. Solid. wLih nn glitt lo * trait* m cd Uncle Sail) used ih > i'iir spolier tnmmunwJuufis urn portjbk rcpcjtcrs in D crl SlOrm, Reads lo Mt. Sl AUJ 5 H in i) Si. L Box 50062 Prove UT 4605 8013731 5

Sw Meter

Get It Firsthand With Drake World BandI ' p J 1 RL Drake Compgny * P0. Box 3006 Mia nsbur . OH 45M U.SA Bob Davis N30YA Well, Uncle Wayne, youVe been pestering me to write, so here goes Thanks for bugging the heck out of complacent hams like me and getting us out there doing something. As per your instructions I have starred my own business (in my spare time, ai least until it takes off and I can quit the broadcasting business), making and selling custom-made drums. I also am involved with...

Portable Scsi Case

Http www.al Ico rp ,co m a Icor p Spectrum Electronic Products introduces the world's tirst handheld repeater con-tryKor. Ng larger than most h a ndheid ratii os. the tt R C-10 co nv erts a single ordual-band radio into a full featured simplex or duplex ropeator 5ys-tem. Key leaturesoftheHRC- 10 include voice iDer, DTk lF Control and programming, hang and time-out timers, Digital Voice Operated Squelch (DVOSlw), telemetry tones, and private vok e mail slot 299 Phone 800-566*2.780 a FAX...

See The Space Shuttle Video

Many ATV repeaters and individuals are retransmitting Space Shuttle Video & Audio from their TVROs 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 538 in the 95-96 ARRL Repeater Directory or call us, ATV repeaters are springing up ail over - ail you need is one of the TVC-4G ATV 420-450 MHz downco riveters, add any TV set to ch 2, 3 or 4 and a 70 CM antenna (you can use your 435...

Attention Ramsey Fx Owners

Wanf lo expand the features of your FX kii The RC series of controllers from MICROTEK will do just lhai. With features such as 7 5cg LEO display 12 buMon keypaD * 5m rpir ofcels wrth push ol & button 20 channel memory ' Fasi sc wring (1 flDm& fchanftaty o aM treoue notes in mefnofy Wanf lo expand the features of your FX kii The RC series of controllers from MICROTEK will do just lhai. With features such as 7 5cg LEO display 12 buMon keypaD * 5m rpir ofcels wrth push ol & button 20...

Code Tapes

Submarine Lift in WWII Wayne'* story of hfs adviiitores on the USS Drum on five war patrol in ttie Pacific in 1941 15 What's it really like on a ubmarine when you're beine '.tepdr charged And wliiit's the day-to day life on a submarine like Did you see the movie Das Boot Eieiting ufl and only 7.50, WG6 Uncle WayUeT Curibheun Adventures 9fip Wayne's ad van lores scuL diving all around die Caribbean. visiLinj feam operators, and si ttsee-jn ft' yott're ineiemed in how to travel cconomi callj,...

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 watts 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 modufe of your choice

Flh

Board mounted in shielded housing. * Completely assembled & tested, w FJ. caps, S0239 conn- * Ready to drop into your system 1 * UHF Rcvr Assy. Now Available w Super Sharp FL-4 Helical Resonators. Greatly reduces IVI & out of band interference Denms Kopecky WJ2R P.O. Box 875 Rahway. NJ 07065 Th s monlh has the appearance of being one of the best monihs for HF communication in the past several months. Fall conditions prevail and the only really POOR days forecas are expected to be...

Technical

Dinrcraort t7 BFL k IWWiWTH 47mmI )t345nmW x 15mmH P.O. to < H20ij7 Los Angales, CA 90064-206 TEL 310 821- 770 FAX 310821- 90 Over 86,000 jisiings and 1 f 3 Countries Wov irx lHjde& new FCC data lorrnat contamFng LF S clubs, milftarv sistJortsr reciprocal taits 667 000 US amateurs a> d 392.000 International cai s CALL DOS a Y ndcws p-'ograms took up name, address enpr-atton date, b- n da-e, < e tse ciass comty. latlong area code time zene sjod square prepms cai and ciass, latesl FCC...

Kdjv M

Newt Direct Digital Synthesizer schematic. the bottom line of the LCD. The VFO frequency will shift back to receive after a word space is detected, and the (Morse f display vvill clear after three word spaces. I'll skip giving a detailed description of how all the buttons work. Operation, programming, expanded construction details, and mechanical drawings are supplied along with the programmed CPU chip. Still dreaming Lets find out more about this great new DDS chip from Analog Devices, Analog...

Monthly Discounts Applicable To Enehjsers Only

Electrically Identical to MastefChanger J If you have two different radios you'fl onty need one charger to accomodate both radios, Now by simply switching the switch to the left or right, you can determine which charging cup to activate, By simply changing adaptor cups, the MasterCharger will charge any Yaesu, Motorola, Icom, Kenwood, Alinco, etc. 2-Way Radio Battery 7 NYS r-5fdents add 6 5 96 sales tax Add 4.00 for postage and shipping Pnces irtd specifications subject to change wrihoui Tonte...

Departments

55 Carr's Corner 17 Feedback Index 72 Ham Hejp Ifs iteming then nght lure in our iiffictV How lust take advantage of uitf FEEDBACK lrsi on 17. You'll notice .i feedback tunnhcr thtf he sinning < c.il h article and column We'd ike you o j atc you ntad vi l kit v e can prim whit I nt ihin s ytm like Mtke KE6QNM and Dan Radovjch KE6SQO on the Mats Rover. flead atf a bout it in Hams With Class'on page 66. On the cover 'What is he, an agent for the UFOs Actually, he's Dave Hess KD6LZA, and you can...

Antennas

KRIS Spells o t hi simple, straight tuiward tarns v hzt you need to lie a successful DXer. S8.0O AR3177 I he ARRL Spread Spectrum Source Rook, From a deceptively simple beginning, a oroup of experimenters set out m develop first dieoretiead and Uit r practical systems for spread spectrum communications. TJii. boot oojisigfr nf aiticles, papers and gov-tjj'nnwut reports that document the process whereby amateur spread spectrum prujiiessed fesflt ibe dra JcLti board to the airwaves. S2U.0G I...

Ttc Touch Tone Controller

* High performance, versatile design. To control any ON OFF Function at a remote SEte via DTMF Radio Link. * Uses high quality Xtal Controlled Decoder ICr w high immunity to falsing 3 ON OFF Functions per Main Card, Easily expandable to any no, of functions w Expansion Cards. * Codes quickly field programmable via plug-in Coding Cards, Many unique 3-digrt codes available. Not basically 1-digit as with competitive units. Latched or pulsed outputs. - Transistor Switch outputs can directly trigger...

Circle S On Reader Service Card

If you gel on the air to have tun and meet new people, that's what you'li find, for the most pan When you run into an ili-mannered op try another frequency instead of getting mad or getting even. One thing both the angel and the NDE reports all agree on is that prayef can be surpnsingly powerful it doesn t seem to matter what demes you believe in just the act of praying has power to heal and change things. No. this is not a new concept and it doesnt mean that poor, old. aging...

Made In The

6 x 12x t b (H x W X D ) ( llv 16 SA 300t' Shewn S2 J J5.G0 Hie SA500A easily attaches to any receiver IF output jack. Providing a panoramic signal display of your scanner or communication receiver. The SA5O0A is a Full Function Spectrum Analyzer with + - 5KIIz Narrow Band Filter, Center Freq. Display, 50 MHz Marker. SA500A The first affordable Professional Spectrum Monitor Analyzer for all serious Main Radio and Radio Monitoring Operators. With Opt, t,3 5 6

Complete Shielded Rcvfl Assy

High Performance Boards & Sub-Assemblies These are professional Commercial Grade Units-Designed for Extreme Environments -30 to 60 C,) All Equipment Assembled & Tested. ID250A CW ID & Audio Mixer Board * Now includes audio mute circuit and Emergency Power ID option. - 4 input AF Mixer & Local Mic, amp. PROM Memory-250 bils channel. Up to 4 different ID channels' * Many other features. Factory programmed. CTC100 Rptr. COR Timer Control Bd. SCT110 VHF Xmtr Exciter Board

Mail Orders Welcome

NJ Litota w IUS L TNT t* SO-THM OH cv. 4 XL 17. IZ 10. TNT i* N -mu vu 44 2 . 10. WVfc c-cfcrr imJ. * iwi, DX SG*in r u fn ufmr*. Mttn Jt 9S fr RG t The noJerPT swi-W -fraQn T Af cLujic op jr rJ hiuJiH. No Inpi or rt iLit laiiliicd to 30Q V Riiid 500 Wte

Estad

f i i n j i - design will initiate an interest in other beacon operators to modify existing beacons or install their own beacon for public safety. One result would be that in the near future an amateur could go anywhere on the West Coast and monitor seismic activity. When possible, I used established kits and circuits for this beacon. Figure 1 shows the design of the system- The actual control interface has been omitted from this article as the beacon control operator could control the beacon...

Ptj

UgdtMMJFM-14 2B.SS AM H adle- Kit fr sc tch y u t j -d 2 LonplfK tyS lern Oj- Snc Uaai r fnlner rcaihe ytrj lo wnle L10 RAMi, PO H and fjn a S OSE IT. ropro essii, Ah. - J& p Lea m to Build and Program Computers with hi Kil p es iona afigiiium 1ofll Kir i'. alri' aM prices. intMics

Sctb Transmitter Assy

FL-6 6Hi Q Resonators with Lo-Noise Transistor Amp 2M or 220 MHz) * FL-4H 4Hi Q Helical Resonators & Lo-Noise Tr. Amp. in shielded housing. (420-470 MHz) * Provides tremendous rejection of out-of-banti signals w out the usual loss Can often be used instead of large expensive cavity filters. Extremely hetplui at sites with many nearby transmitters to liiter-out these out-ot-band signals.

Special Features

* SCUD STATE ELECTRONICALLY REGULATED * FOLD-BACK CURRENT LIMITING Protects Power Supply from excessive current & continuous shorted output * CROWBAR OVER VOLTAGE PROTECTION on all Models except FS-3A. AS 4A, HS 5A. S-4L ftS-SL * MAINTAIN REGULATION & LOW RIPPLE at low line input Voltage - HEAVY DUTY HEAT SINK CHASSIS MOUNT FUSE * THREE CONDUCTOR POWER CORD except foi RS 3A * ONE YEAR WARRANTY * MADE IN U.S.A.

Shortwave

NBPAVV9-F 1995 Passport 40 World Band Radio . Initri rj n . -rrjj.-. iet-uit'i Ltd Yda il ji' t ihr lairM station jnd lime ri SIVM 07R2S The RTTY Listener h hni Oster-mun and espjmleil. VL'inlt cd kick compile5 iss CiS I through 25 id th RTTY UjtleHL'r Newsfcucr ( iiiil.iti uj> ii1 ilnie, Ii liU-I. - I i m inform iion on idvjinccd Kl I llhJ FAX monitoring technique and Ire uencHf . StM.95 09S42 The Scanner Listener's Handbook ('V f 'dn jrd Jwvj prn- S2B I i it- liu- tttM It i CRB3M1 Scanner...

Fair Radio Sales

EUREKA Sox 1105 LIMA, OHIO 45802 SMART BATTERS CON ROI I ERS OR LEAD-AC lt> OR CELL-CELLS CQKTttvtJ US CHANGE UC3& 06 I.C . PTC FUSE SrtTTCMABLE OJRHS , FrFVF-PSF aATTERV PROTECTlOf TR1CW.E START D& L S1D .D PCS SCft WTERMNALS S -WJLi HJRO SE BASIC aiT OR COWLFTE K T W JlETER LO-VOLT OPTIO TfWt F RMER A ENCLOSURE coMpuEra xfT eccoMTL-oe FOR e w. t AMP BC-CONTL-12 12 OR 14 V t AMP MAX

Ich

45 W VHF, 35 W UHF Mtttabie) Indepcndeat Controls 110 Tola Memory Lotatiem fluto Hepifliir Oifstf Function RmcU DTMF Mk (opt. UMJ 14 A ladialing ttltmoriB Direct Frequency Input opt. UT-55) 0a -pusS Action ftutioni Gudt-in OupJeier 7,4 W Audio Optiono Toae Squelch ltd Peek it Get The tc-rooil feaiures a Detachable Fron I Panel, ttith the optional mounting kji ujii ean mourn the faceplate in an eiLsv-to-see location while keeping the main body1 in a secure place, such as the h unk of your car U...

Garfield Street Newington Ct

I MM Kenwood TM-741 A or TM-742 A* UPGRADES mm The RG-740X Band Unit Expansion Box The RC-740X has been designed to accommodate those Hams who require more capacity for their dollar. With it you may install up to four additional units> This allows you the option of having alt six bands, either mobile or at your base station. No longer must you decide which upgrade band units you will do without Purchase any or all four of themt The HC-740X has been designed with the Ham in mindf allowing you...

Circle C On Deader Service Card

Micftaei Bryce W88VGE 2225 Mayflower NW Massillon OH 44646 As more hams take to the low bands, tilings can gel a bit messy. J would guess thai every commercial rig has a RfT. of Receiver Incremental Tuning control, built tn. But most of the QRP rigs I've used in the past don't have this very useful feature, in iact. it took Heathkit three tnes to fmalfy add an RIT to the HW-9 ORP transceiver. In its simplest form. RIT is a circuit to allow Ihe operator to vary the receive frequency up or down a...

Centaur Electronics

AZ B5713 l& SOl 623*672 - FA* 520J 6PP 1341 doesn't have to be expensive anymore Evcry day mon harria art cnh uiung ihrir communicztion by using Jmsgei. JoiU fie fu wluu youH C h cr missinp. Evcry day mon harria art cnh uiung ihrir communicztion by using Jmsgei. JoiU fie fu wluu youH C h cr missinp. ytwlity CoIw SSTV i y ici m1 lw Mbh with h akun TV. S2J9.9S Hfqjircg IBM Pr-i mp Lbleh1t ortaH CM. I Mepibytc or mem rj, col VGA displac MS-DOS. Shi rin J W U.S. A. uL...

We Call It The Scout

Every feature can be mastered in minutes. No modem rig is os easy to use. It only takes o second to change bands. Plug-in modules are available for 160-10 meters including WARC Single conversion and crystal mixing are the foundation of Hi is 90 dB dynamic range receiver That's the strong signal performance of rigs costing 3 times as much Ifs 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. This...

S

A Division of The McGraw-Hiil Companies. P.O. Box 549, Blacidfck. OH 43004-9918 YES Please send me the books listed below, billing me just S4.95 plus shipping hand I in a & tax. Enroll me as a member of the Electronics Book Club according to the terms outlined in This ad. If not satisfied, I may return the books within 10 days without obligation and have my membership cancelled. If you select a book that counts as 2 choices, wiite the book number in one box and XX in the next. If you select...

Bbt

Tot ally so h i r-po we i ed OR P si at ion, 10 feet ol 1-1 2- by 3 4-inch hard wood 7 square feet of 1 4-Inch plywood 6 carriage bolts 1 4-20 and 2 inches long 2 machine bolts 1 4-20 and 2 inches long 6 hex nuts, flat washers, and lock washers for carriage bolts. 2 wing nuts with lock washers for machine bolts, 2 'IT shaped brackets from pipe hanger material. 2 aluminum pipe legs 8 to 10 inches long. 2 siticon djodos type 1N40G2 or equivalent, 1 amp. 50 to 100 pi v. 1 voltage...

Software

GGTE Worse Tutor fwm be iiUKr lo itn tbsi. l -T(li m I . -T . r. T T T ir- V n j.-.t ' Fam> wirLb mik1 --A Jnl ovlt< m LiH't' icqnincnrntt *> ' i i r. F r IBM PC, T fV oritirapjuhk Mnr fitor JL23' Di.it II rai ZM rw Tutor 15 Disk St frCr DV5 GuM Edition .25u Disk eGAIWJGoldEdltlMir Disk VV5GWHO Hftm Operator Education Package Software Niw u txtra for s. conuiiu 1-Mitts 1 i r Mt 5J 4 isLi S 9.9.5 W5GWNSW No-Code Hatn Radio Software Package for PC aids both 5 IE and Larue Code P rog ram...

Tssdx

The NEW KENWOOD TS-950SDX (DX-CLUStVE) is tne talk of the new generation HF transceiver Continuous research, development, engineering, and production of superior products make Kenwood the recognized leader In Amateur Radio. Utilizing the most advanced technology available, our products offer Ihe highest level of quality and reliability. The KENWOOD TS-950SDX includes advanced digital signal processing (Q P) while remaining user-orlented. It also includes dlQltal AF VBT, IF notch filter,...

Arrlbooks

A& m ARttl mi Handbook 0l t MJ Futures added L& r imjimved treatment of I1 and Pi L. all ne all-flgital-Mgk, phis Juts more. ARWBS 4 ARRL Opcratfcg Maiiud (Jih Fcl.i information on ItQW lo mate rhe hest m of y-tjii tataon. including interfacing home ooTJiputeri- SCAK< VHF ARMS 7 QttP Nofcbucik by Dave Z& Afow WIFE Presents construction projects for the t< RP npsrator AS3207 TVlPB-j Design Notebook by Dqve DeMaw W1FB Filled with si tuple piaetical projects Unit can be built usinji...

Call For More Information

(information without radio purchase 40) Orders 1*800*456-5548 For info. 307-266-1700 P.O, Box 4012 * Casper, Wyoming 82604 FLEXIBLE 13 FO L BRAID ifl * 4tt Mz SWT WH Ml* EQUAL FOIL BRAID 2.7 tllj D 400 MHz 42 FT mFT 9014 EQUAL'FQAM F0tL.< 4Gtt BRAhD 3,SdB 9 400 MHz WFT WTT LMFl 400 DSL ShLD IllA JACKET 2 7dEJ JSOIWbz A2 FT SOFT LMR WO UUrafte*DBL SHLD*TPf JACKET 3 1cf) 0 450 WHi 7IFF 72*1 LMPfiOOOBLSHLD IN A JACKET t 72 0 iMMhf 1.4MT 145 FT LMR 900DBL EHlD MA JACKET M 0( 0 ASCWrtt AfltfFT...

Circle On Header Service Card

Collins-designed receiver covers 0.5 to 32 MHz AM-CW in 31 one MHz b ands read on 5-digrt mechanical counter Bandwidths 2-4-8-16 KHz plus A6C. 8FQt Line d Carrier Level meters uses 33 tubes. Includes 2 spare tubes (1 each type) & operators manual 10 5x19x16,8. 95 lbs sh. GOV T-OVERHAULED 525 00 SERVICE MANUAL, partial reproduction 15.00 S-N1ETER for Collins KWM-2A, Unused 29.95 6146W TUBE, JAM box GE 19.95 ea Prices F O B. Lima, 0. VISA, MASTERCARD, DISCOVER AIjdw for Sfiippiny * Write lor I...

Ftr

70cm RX 420-470 MHz TX 430-450 MHz Choice of 4 keypad options (6,16 or Deluxe and DVRS16 Keypads) Auto Range Transpond System (ARTS'*) High Audio Output 12 V DC Direct Input Digital Coded Squelch (DCS) Digital Voice Recording System (DVRS) W FTT-10 A16S True FM for better voice clarity

Digital Reld Strength Meter

Hgh Perf-uman e, Precisian lns u i measures in relative and ab u ute uniL Relative measurements from 60 Hz ta he GHz ange and absolute measurements from 1 MHz to 100 MHz. (Broad band wilh no tuning adjustment). Adjustable length dipole antenna sets squired sensitivity At high gain settings, ambient R .F. fields from local sources will indicate on the display). Dipole antenna eliminates need for a counterpoise (A single antenna type field strength meter utilizes the person hoEding the unit as...

Books For Beginners

TAB4 54 The Beginner s Handbook of Amateur Radio, Third Edition by Ctoy tipster W5ZPV, 195 piiges Wondeifitl book for newoom er . Et is basic and well illustrated. Even if you have a I the other ham handbooks, ynti'l still fired tins one useful 22.00 W5GWNV Ho Code Video, Manuai, Part 97 Rules I arn hnw to a ham radio oper& it r. S29 J5 WSGWN Technician Class License Manu al New No-Code fy. Gorifon We si Thi . took covers everyditn you need to become a Technician Class Hani J-.veiy ques n...

Circle S On Reader Service Caro

OlER .4 MILLION CML SIGNS rO N LI N En IJ T& 1 NT ER IN AT I OiS AL CALL DIRECTORY HamcnlS online service gives you access to over a million hams via your computer < & modem. Updated cach month Omv 2 .95 per year. Unlimited use - 24 hours a day -vou pay for the phone call. Route 4, Bon. 1G3D - Mineral, Virgins 23117 Internet inrD tiuck.com

Mkj

Revolutionary new SWR Analyzed is the best investment you'll ever make Now you can diagnose a wide range of antenna problems instantly with one easy-to-use instrument MFJ-249 MFJ-249 HF VHF SOAQH'SWR'Aria y r has all the features of MFJ-259 hat less RF resistance meter Includes 1.8-170 MHz continuous coverage, 10-i_hgit LCD frequency counter and smooth vernier tuning. MFJ-209 MFJ-209 HF VHF Sf Analyzer* IS lUSf same as MFJ-259 without LCD frequency counter and KF resistance meter. Has jack for...

Get The Atv

Snow free line of sight DX is 90 miles - assuming 14 dBd antennas at both ends. 10 Watts in this one box may be ail 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 RF out 1 to 10w p,e.p.) and sync stretcher to properly match RF Concepts 4-110 or Mirage D1Q10N-ATV amps for 100 Watts...

Transmitting Converters

Buy at Iows factory-direct net prices and save For complete info, call or write for free catalog. (Send 2 for overseas air ma it.) Order by mail fax, or phone(9-is am, 1-5 pm eastern rime). Min 5 S& H charge for first pound plus addI weight & insurance. Use VISA, Mastercard, Discover, check, or UPS C.O.D 65-D Moul Rd Hilton NY 14468-9535 Phone 716-392-9430 (fax 9420) You get more features for your dollar with our low power CMOS, (specify call) L- --_- only 54kit, 79 w t Digital ic records...

The Complete Tab Reference

0339635 24.95 I3 7P 29.95 376 3 -XX 59.50 3362P 14.95 H aide over Ccu nts a s 2 Ha rd cover and Reduces QRN. Solid Copper Buss Stainless Steel Hardware Grounding Stud Every 6 Inches Ground all of your equipment chasis's to a single earth ground in one easy installation. 2 ft 11.95 3 ft 16.95 4 ft 21.95 5.00 S& H + 2.00 each add'I per buss Custom Lengths Available Flexible Rope Wire Straps w Term Ends All Solid Copper 2.00 Per Ft. S & H free w buss order 3.00 without Flexible Rope Wire...

Heo

The very same idea can be accomplished by using several small fixed capacitors. You seleci the amount of offset by grounding a capacitor connected to the tuned circuit of your VFO. You end up with most of the problems you get when trying to use inductors. The old-fashioned 'bandspread control used in the older radios is a prime example of this type of circuit design. By far the most popular method to date is to use a varactor diode across the tuned circuits of the VFO. A RJT control voltage is...

Reference

FlS-1 The Amateur Radio Mail Order Catalog and Resource Directory. 4th Edition is itit3 mtKrt cumpu'hiifisiYe source book fur cLuclnuiiL- NOltwjirt, und equljUMt tin- lifted ,11 i iti radii i amittet . -dlous electronic huhhvisi aEiywhere1 Flu* a wealth of value-Added reterenc material jll in 2(i2 pjffs. -Uh Eihtmn clearance m onh SI - (Iflj Ta8 70 Transmitter Hunting (n Joitpk iff< r H rtnd Thomat Crr rr R*Jii> dirtctkifl finding Mmplifml SWJ5 UE202 RTTY Today in win nan M L'unif ro...

Wayne Writes

AR3t69.QRP Clarice Compilation O AKRL publications n building receiv transmitters, trans- elvers, aecesswies st2- 0 AR4270 FCC Ruh' l onk A must lor everv active mdio amateur. AR035 Morse Code Th* Essential Language i> y L Pem C jt jr. i-'. ffj irvy Expanded d revised in its 2nd edition. How to handle distress callt heard aot otilv on thi h mbauds bttt cm maritime and aircraft frequencies. Sfi. O An ARRL book. 314 big pages. This explains everything very simply the math. DC. AC, trunsistot...

Hct

The main hoard component screen. Photo ( Display and switch hoard, mounted to main hoard. Photo ( Display and switch hoard, mounted to main hoard. connected to port 3 of the MPU. The columns are scanned hy using a 74HC42 binarv to-decimal decoder. This saves a few I O lines. Three outputs from port 2 contain hand select information in BCD lor automatically selecting a proper mit or rev (liter on your rig for the current operating frequency. The LCD data lines are connected to port 0...

Nqg

4.7nF 10 V 0.1 nF 2.2 iF 25 V 22 pF 120 pF 220 pF 150 ohm 47 ohm 390 ohm 51 ohm 10GK ohm 10K Tantalum cap ce nam ic mono cap .1hLS Aluminum electrolytic radial ceramic disk ceramk disk, NPO ceramic disk, NPO all resistors, 1 4-W. 5 cartKXi film trimmer potentiometer Bourns 3316F senes Figure 5. The switchboard, copper side. National Talk Radio Show With Len Winkler, KB7LPW Weekly Co-Hosts, John Moore, NJ7E and Ned Stearns, AA7A Weekly DX Update With Lee Knkel, KY7M Tune in each week for...

Baypac

-& Q0-B2 fl722 ( 503) 474- 7GD Both the AEA PK-232 and the MFJ 1278B digital multi-mode controllers use red LED bargraph tuning indicators to assist the operator with correct transceiver tuning when operating on the HP bands. These red bargraphs are fine in subdued lighting, but they tend to > Lwash-ouf under direct or overhead lighting, making the dancing bars11 difficult to see. Fortunately, these bargraphs are made in convenient, 20-pin, ptug-in, DIP packages, with 10 pins along each...

Order Now Hobby Kits

Hear exciting air-craft communications-pick up planes up to 100 miles away Receives 110-136 MHz AM ai r band, smooth varactor tuning superset with AGC1 ceramic filter, adjustable squelch, excellent sensitivity and tots of speaker volume, Runs on 9V battery. Great for air shows or just hanging around Ihe afrporil Mew 30-pagc manual details pilot talk, too, Add case set for ' ro look, AFM kit 29.95 Matching case set, CAFI 514,95 Keep an ear on the tocal repeater, police, weattier or just tune...

Novatech

Inc., introduces the Model DDS4m Direct Digital Synthesizer DOS) Module. The DDS4m is a low-cost, 34-MHz signal source that combines small size, excellent stability, fast switching, and low noise tor only 395 in single-unit quanlilies. On a 3.5 x 4.5 board, the DDS4m simultaneously outputs a precise sine wave and an accurate TTL clock signal. The output frequency is programmable from i kHz up io a maximum of 34 MHz in steps as small as 0.02 Hz. Typical phase noise is 90...

In

Two 100 ohm Z wall resislors in parallel ** Two 50 ohm 2 wall resistors in series 1 3-15 16* x 2-1716 x 1 -5 8* plastic box Radio Shack 220-231 2 335 pF variable capacitors Radio Shack 272-1337 or Mouser 24TR218 w two 4BSS003 mtg screws 1 One-pole 12-position rotary switch Radio Shack 275-1385 1 DPDT toggle switch Radio Shack 275-614 1 T13G-6 (yellow core) toroid Amidon Associates 2 BNC chassis mount jacks Radio Shack 278-105 1 100 A miniature meter Hosfelt Electronics, Marlin P. Jones 2...

Inline

PREAMP -- --V ONL Y 89 kit, 119 Wireiffilestfid Automatically switches out of line during transmit. GaAs FET Preamp with features similar to LNG series. Use With base or mobile transceivers up to 25W. -Trining range 120-1 , 200-240, qf 4 QQ-500 COR-3* COR timers, court.beep kit 49 dMD. Diode programmable kit 59 COR-4. Complete COR and CWID ali on one board CMOS logrc for low power consumption. EPROM programmed (specify call) kit 99, w& t 140 REP-200C Economy Repeater uses cors controller (no...

Kawin Software

KaWin, the only Windows program to support Karifronics TNCs in Host mode, ts now available for download from the internet's World Wide Web. KaW-in provides concurrent access to four TNCs, to both pons of multiport TNCsr to simultaneous VHF packet and HF non-packet modes, for up lo eight attached transceivers and as many 26 concurrently connected stations on each radio1 Each connect, as well as Lite background activity on each TNC port, is displayed in its own window using color-coded index tabs...

Connectors

PL35& SILVEFnEFLONraOL i HP . 10PK (11Q0 PKEI25D0 V CONNECTOR SILVER GOLD TIP 10PKSi3S5G 25 PKS 175.00 MOP E ITEMS STOCKED CABLE A WiftE CU7 TO YOUR SPECIFIC LENG TH* TECH INFO 706-506-1886 FAX 708-506-1970 1t3 McHenry Rd.T Suite 240, Buffalo Grove, iL 60069-1797 l Mtt IWhtnisivt DX Gail Antennas lor SO thru 1 ally hidden InitalE Fs& r * Fixtd or Ponabli * Therf I 20 net marins wilh rt iD Pun h btdictl m Tfait pi DlKi VM) Oft'l Mt iL ti L y-ft ncJghhors tajv'l tirhi r Bas n wortu tvirr...

Qrp Mc1496p Circuits

MFJ-208 M FJ-208 2 Meter VHF 79 95 SWR Analyzer finds Ihe * * SWR of any antenna from 138-156 MHz, Jack for external uency counter. I f2x2lhx2lfi inches. For Commercial VHF Radio Same as MFJ-2Q8 but for commercial VHF MFJ-217, 79,95. coven 30-50 MH and MFJ-218. *l MFJ-204B Great l r determining fwdpoini resistance of *7 antennas and for designing impedance matching networks. Measure RF resistance up to 500 ohm. Covers all ham hands 1C0-10 Meters. Built-in resistance bridge, null meter, iunable...

Pc Sstv Si

PC Slow Scan Television is a compieie system for sending and receiving full color amateur SSTV. The package includes an SSTV FSK modem. SSTV software, image capture utilities and reference manual. All popular formats are supported including Robot, Scot tie, Martin and A VT The system requires a 286, 3f36 or faster PC with VGA or super VGA display. For a limited ime we are offering boih software packages with a single FSK modem for urid f 32QC This combination offer will lei you send and receive...

Nye Engineering

NYE Engineering can now supply the FS73 Signal CubeMi- RF field strength meter in the form ol a digital meter connected directly inlo the RF IF section of a radio receiver, in this form, model FS73C will provide a much higher resolution of signal strength than a conventional communications receiver typo meter. telescoping dipole antenna, is a calibrated RF field strength meter. The new FS73C connects directly to a receiver to be a digital signal strength (h,S) meter. The selectivity and...

Ramsey Sx-20 Schematic

Ramsey Electronics 793 Canning Parkway Victor. NY 14564-8924 Price class 5349,95 (Kit) S429.95 (wired and tested) Yes. that's right . , . another QRP rig for 20 meters. Soy, it s getting harder to flip through 73 these days without coming across an advertisement or review for transceivers like these. Buitd-it-yourself QRP rigs for 20 m. 40 m. and other bands are about as hot as pogs, 0. J. Simpson, and sport utility vehicles But the SX-20 isn't ready just another QRP rig, what with features...

KENWOOD

YAESU Ham amp Vertex Business Radios rr ssc, FT-SSP FT9500L FT1 1, Ft-230 , FT-S90h FM 00 0 530 FT- 5 0 FT411E, FTAfI Ffi -l oB. F7-23H. FL-7G 0 Linaar. to V P 5C03 SynirissfZEd repeler 25 WBftbr YHF 0r UHF. VEW WARANE VJ M-1CQ HAM, MARINE. BUSINESS AND AViATJON RADiOS. 61-H, 4ai H. S34tfH. 270Q-H.IC-D1W, GP-22A Nsvi R30LT F40LT, HI 6. U16, snd repeated. SHORTWAVE RECEIVERS R-l.H-1QD,fl-7000. R-9000 R-71, GP-22A. TS-SOS TSJ-SUS'AT. R jflM TSflBiH, TV J4l.- 41A. TR-rSIn KfllwMm i urvlc P-ip-nr...

Digital Frequency Readout

For cider anatog transceivers TK-1 Wired a nd TeslsdjS 143.95 Model Heal Sink 6.5 x W x 1.6' . S24.00 CHS fl Copper G raadcf 6 ff X 3 S , 524.00 Low Pass Filters up to SQOW for hflrmanlca Spiffiily 10M, ISM, SOW, 40M. 30M or 16GM HF Eptiltvrs and Combinors up to 2KW Metalclad M ca Caps - Unclco Stmc AflCCWSPRAGUE Tnrtimer Capacilors We can qttl yau vhlua ly ny RF kalfatert Cafl us for rsimnge'' hard to find parts 508 Millstone Drive Beavercreek, Ohio 45434 584D Phone 5IB 42 -S60 PAX 313 429...

Features

A full-featured antenna tuner with built-in SWR meter .AD5X DDS Dream VFO Yes, you can build your own Portable Solar Electric Power Generator The sun is free for the A high-performance, regenerative short-wave Why settle for operation on just two bands WB9YBM Making additional use of beacon signals N6JSX A lifetime of ham experience should count WN3UWH A neat little addition to your

Test

To tintJ the RtT control cemer. Connect a VOM To R4 poi center pin. Appty 12V lo the key me at R8. Note reading on VOM. Remove the -12V from ihe hey line, jnd adjusi the pot r4 eo the same VOM ieadtng Thts is the RlToenmr. Joe Moeti P E. KOOV P.O. Box 2508 Fullerton. CA 92633 imagine going to a football or baseball stadium that doesn't have a scoreboard , imagine also thai final scores aren t published for weeks alter the games end It sounds absurd, but that's the...

Sate Lute Telephones

Ultimate, transportab e telephone, Make and receive phone calls, fax, tabic, datar anywh amp re in the worki, Write or Call for prices. Suva money o batnorios Call for Special Prices. - JiW GRUNr lfj JRC - YAESU IGOM Calt SareNite lf leunor 2 in Guilua H Tor vvorldwidc use. ull 4SGTI. w amp v f Artemaa Wite n, fl r n, to POtwr nlliiis becis ECH - h Compeler i lUorrncos StocKP MFJ-1 73E WFj-127 . MFJ-1 J AEA FK-EW. MFJri27flT, PK-300, FH-23 M X W FAX, DR3 FROrJUCT5 05P2 32

Tss

HF is going places - thanks to Kenwood's new TS-50S. the smallest transceiver of its kind in Ihe world. Providing high-performance communications with go-anywhere convenience, the TS-505 Is your passport to freedom, And whether used for mobile operations and DX-peditions, or In a fixed Installation, this rig packs a powerful punch. Maximum output is 100W. and there's a full range of advanced lealures including 100 memory channels, DDS with innovative fuzzy conlrol, and AIP tor superior dynamic...