Info

. you'lE enjoy receiving Club bulletins every 3-4 ,veeks containing exerting offers on the iatest books in he field at savings o up To 50 off regular publishers' pnees. If you want the Main SeleC'On do nothing anc T wiii be shipped autc-rna cally. If you want another book, or no book at all, simply return the reply form to us by the date specific You'll always have at least 10 days to decide. And you'll be eligible for FREE BOOKS through our Bonus Book Program- Yaut only obligation is lo...

Ez Key Cmos Keyer

S -ld you* itft ham Sem.f.-.e atmooe AM. CW. SSfl reo& ws use area cortwersi(*i design wiih WE602 IC as teamed m Q T and AHRL narvj. books- Very aensilme vvkw tuned owe* entire band Plenty of 'jpttaker volume Runs on 9V DalTery Very EASY 1o build, lots of fun and educaiionai ideal for beginnef or old pro Nhw 30-page nwuiijt Addthecaiin Bet For well-fitted prolessHinfll look. Your cho e oP bands 29.95 specify band hh- 0 hh-30. hp-40. hr O Haith ng case I knob setXHR end perfett CW with n an...

Crt

Figure f The HADAD s made from a defunct marine radar display unit 2nd rotary coupling assembly added to a 2 meter receiver, attenuator and PVC pipe vagi. KA6SOX. With an RF attenuator ITS based on the offset attenuator in GST lor November 1992, We changed ihe oflsel to 1 MHz and use a crys& f controlled oscillator, plus better shielding* Photo C. The 30 VDC motor is geared to the rutavng antenna mast and the re* solver tnstae the mast is the oid svaveguide. which holds a stationary dnv&...

Five Excellent Reviews Just

OONT HAPPEN BY CHANCE CALL US FOR A FREE CATALOG, in Oct 71IW Sup tl lyji i March 73.10u CO, Mar. W.H.91 137 Mancliaitor Drive 1 Florissant, Colorado 90816 (719) 647-0650 fcalyn 4 M(t UGH* Tfcr m.diTif twjj fi,i version of Hit tUssk rifunttrjtd rr Ft T T E7 1 il TV & N Hjnc .ia i), til ttncV p, Tjrif. 0 4 GJIITI riww frequency foidvtoVrc 1 W* JU(I IredUted tn .VXM V Low Natu Rdtcd 500 Wan fcalyn 4 M(t UGH* Tfcr m.diTif twjj fi,i version of Hit tUssk rifunttrjtd rr Ft

Ft Ftgx Ft

FT-212RH, 2 Meter FT-712RH, 440MHz FT-7400H, 440 MHz FT-912RH, 1.2 GHz FT-6200, 440 1.2GHz Reverse polarity means instant destruction t o the 12 vott DC input circuitry to this handheld. During our testing, we discovered that the 12 volt input circuit does not charge the attached battery. This was not a surprise some handheld manufacturers provide a 12 volt regulator for mobile charging, but others don't. We did find that there is a small buffer circuit off the external 12 volt Etne to help...

LPA

Ramsey Transceiver

Standard Repeater Standard Repeater HPA Ramsey Electronics FX-146 Transceiver Kit Ramsey Electronics 793 Canning Parkway Victor NY 14565 Telephone (716) 924-4560 Price Class 149.95 without chassis knob kit 24.95 for matching CX chassis knob kit. Okay, you're a typical ham and like to fire up the or soldering iron once n awhile. Let's say you just found 175 stashed away for a rainy day or the next trip to the Dayton Hamvention. (Sometimes they are one and the same ) What would you buy Let's see,...

M I Ii I

An economical, easy-to-build, 25 watt 2 meter amplifier. The Falmouth (Massachusetts) Amateur Radio Association (FAR ) is well-known on Cape Cod for its hospitality to newcomers. It is also one of the more active groups in Southeastern Massachusetts supporting two repeaters and a digital Node LAN. One subgroup of the association is the HACKERS, a group of amateurs who enjoy designing and building their own equipment. When the HACKERS noted tha a majority of the new members joining FARA were...

Dvm

530KHz to 1650MHz with AM FM WFM LSB USB 50Hz Performance rivaling that of recievers Uiat cost twice as much. Extremely compact and versatile. Features 1000 memory channels, lockout oft search und scan, backlighted LCD display, Attenuator, pP Delay, Hold, Bank lockout. VFO tunings I Year Warranty, & Earphone jack. Size 6 3 8H x i 7 8W x 2 1 3D. Wt 14oz. Ground shipping 5.95 Air Freight Call or Fax Toll Free, 24 hours a day. in your installation, R2 can consist of 12 voh light bulbs...

The Grapevine Group

3 Chestnut Street, Suffren, NV 10901 ORDER UME 1-600-292*7445 CUSTOM 5ERV(CEl 914-36B-4242 914-357-2424 Hour s 9-6 ET M-F Fa* 91 J-357 243 We Ship Worldwide 15 Ros Doc king Prices Subject Iq Changes A NO RADSAL VERTICAL THAT COVERS 80 OR 75 METERS No, we won't insult your intelligence by telling you that it's a lihalfwave 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 If,...

Bp Hs

Mtsc hardware M Mouser Electronics, CS Circuit Specialists, Type 0.001 tiF 0,1 pF 120 pF 68 pF 22 pF 3 pF 2.2 nF ARCO 123 ARCO 3.3k, 1MW 10 otim, 1W 330 ohm, 1W 2.2k. 1 4W MRF 1946 A 2 N 2222 LED red LED preen 1N4Q0G 1N914 71. tf 18 rtourtd over R8 AT. *18 3 8J i d. 2Th 13 18' Ld. 4T, 18 1 4 Ld. jjH w ferrite bead Relay. P N ME431-ORV-SH-212L 2-pin, JonesrrRW Cinch BNC chasis receptacle, UG1094 U Bud chasis AC-431. 4 x 6 x 2H Bud bottom plate, 4 x 6 inches Heat sink, 2x1x4 channel siock Tel....

J

IHPEbAMCt Q VARIOUS STRIPLINGS OEffhDS OH C1 flCUI T BO RP H HT BMI AL. USE I MC H 1-10 i rTHEFQLfl5S-t V > I e's a Compact Speaker Mic that fits tfortably in your hand and has a full speaker for crystal clear audio* fo need to remove your handheld from r belt to talk or monitor calls. Clip it near r ears so you can easily hear every call i the volume turned down. Hrst*rate electret mic element and full speaker gives superb audio on transmit recieve* Earphone jack, PTT, light-ght retractable...

Bm

I Analog to digital converter, uS wrth CSfl, volc jtiari *f- S deg ior h H o ofs H Ml,, S 69. Ai sehn Tili'.K c-3gr5ir irid ftt w i cpera+e ft sei up remole & 0 Rift w PvfChHT CSC 4Masle f card Vi sa ' Ame * * Di ENGINEERING CONSULTJN 583 CanDLEWOOD ST BREA. CA. 95621 Td 714-6 1 Fas 714-255- Larry has had some very long+fange conlacis using trie plane as a repeater Several stations as far away as West Virginia over 100 miles away) have worked through the plane during some recent flights...

Circle On Reaper Service Caro

Phoenix, AZ BBO& 1 i 4303 No, 40th Dr. Phoenix, AZ BBO& 1 - Jhoto A. The Honorable Governor (Oklahoma) David Walters issues Governor's Commendations to the top eight winners and their teachers) of the 1993 Oklahoma Student Inventors Exposition, - Jhoto A. The Honorable Governor (Oklahoma) David Walters issues Governor's Commendations to the top eight winners and their teachers) of the 1993 Oklahoma Student Inventors Exposition, nore. The organization has a 501(0)3...

Pkmbx

This HF VHF packet TNC is your best value in packet radio1 The PK-BS is loaded with unique operating features and backed with proven hardware and software design. This controller combines all the amateur data communication modes into one comprehensive uniL Over- 65P0Q0 have been sold worldwide Wow with FACTOR Take a iast trip to the future with these digital signal processing (DSP) multi-mode data controllers AEA has the most advanced and adaptable data controllers on the market today the DSP-1...

1

Switching Element (transistor or relay) In my survey of what's already out there. I found that one of three different techniques may be used in the typical charge controller to limit the solar panel's ouLput upon completion of battery charge. Each technique has its own advantages and disadvantages. See Figure 1. The series-regulated approach uses a switch in series (surprise ) with the solar panel output to disconnect the solar panels from the batteries as soon as the desired level of charge is...

N

There are still plenty of frontiers for the adventurous ham to explore and pioneer. Everything hasn't been invented. by a long shot Indeed, there are tons Ol articles I'd love to see published in 73. if only you'd write Terru For instance, Tve seen pittifut little fn recent years on siow-scan developments. We need to (a) digitize slow-scan so we can send some really detailed full-color pictures, and lb) use modem compression technology to keep the bandwidth down. When's the fast time yog saw...

Aa4aw 2 Meter Fet Amplifier

Not used on our production run, All of the input and output foil runs are constructed of 50 ohm micros trip Z2-Z6 etchcd into the circuit board, The circuit can be modified for solid-state T R switching. A PIN Diode T R switch may be a better choice for packet operations, which require high speed switching. Several articles including A 2 Meter FET Amplifier for Your Handheld by John Cunningham AA4AW. 73 Amateur Radio Today Oct. 1992, p.20 and the ARRL handbooks contain examples of diode...

Telephone Line Test Handset

AT amp T 206A2 These rugged line test handsets were originally designed for Use wltfi AT amp T's Craft Access computer. They can be used like any other line tes handset, but they have special features which may or may not be usefui. In addition to the touch'tone keypad, talk monitor switch, alligator ctip leads, 4 conductor modular jack and tool helt clip, these units have a LCD screen and function button joystick for use with AT amp T's Craft Access computer. For the average user the extra...

Q

Leavey M.D., WA3AJR 6 Jenny Lane Baltimore MD 21208 J hate to do this, but I arn going to ask all of you to take your seats, get out your notebooks, and turn back a few sections to the notes you took on this column a few months ago. You didn't take any notes Shame on you, now you'll have to go get the magazine itself. Why do I ask such a thing Because there is a mistake in a schematic, and I don't want anyone tripping over it In the August 1993 edition of RTTY Loop. I printed a selector...

V

MFJ-1701 21 MFJ- 702 B S99 J- 704 Select any of several antennas from your operating desk with these MFJ Coax Switches. They feature mounting holes and automatic grounding of unused terminals. One year unconditional guarantee. MFJ-17GI, S34,95. 6 position antenna sw itch, SO-239 connectors. 50-75 ohm loads. 2 KW PEP, 1 KWCW. 10x3xll 2 in, DC-60 MHz, MFJ-I702IJ, 21-95.2 positions plus new Center Ground. 2.5 KW PEP, 1 KWCW. Insertion loss below . dB, 50 dB isolation at 450 MHz, 50 ohm. 3x2x2 in....

The Ham Contact

Box 3624, Dept. 73 Long Beach, CA 90803. CA Resided Add a Snl'-, Tar Cafldlan Pe indents Please Send U.5 Money Drd r A St7 TO Shipping It you wish mow inlurrulion plcaao stind d SASE to Ihe above Adores , Few COD orders call amp 10 433 S06Ot QUUkd uf CA qah fiOOi 933.- HAM a jrJ e.iw j rressaae Advanced features in the palm of your hand. Azden Corporation 147 New Hyde Park Rd. Franklin Square NY 11010 Telephone 516 328-7500 Price Class 379 plus 5 shipping 516 328-7500 , Attn Sid Wolin...

Icom

TS-SOS, TS450S ATt R 5000, TS-85 5, TM 24W441A. TR-751 At Kenwood Sendee Repair, TSH0S. TS69 S. RZ-1. TS-790A TS950SD, TH-78A, TH2SM A, TM-W1 A. TM-741A, TM-732A. TM-64 A, TM-7A2A, 7lA.R7 A. R7000, tmo , rm00 Bearcat A S A S-CtJStoafl Hy-Gam Hustler. KLM. MET , Umar. fc0DU6L0K TONNA. 3i gt ttflftim, Mull Ban J JCM J AT IC02AT 2SRA IC2MGA1 24AT C AZ1 16

Caxmax

Com fit's besi-selling 2m 70cm base erlenna. Featuring the Comet exclusive SlC system for maximum gain and stable resonant frequencies. Choose Irani a tamely of great products aEf pre-tuned in single, dual and tri-band fixed station antennas, Gain is 8.5 11dB CMX-3 140 to 512 MHz 200W 169 96 CX-9Q2 left - Tri band for 2m 70cm l2 0MHz. Gain Is 6.5- CA-2x4Fx middle - Dual band for 2m.'70cm Gain 4.5-7.2. dB pP -n . SB5 and SB7 NMO styl dual. i htenna. They Foawr a.-toldr 'base,, great Sty ting.and...