Hrmsrts

Andy MacAilister W5ACM 14714 Knights Way Drive Houston TX 77083 Field Day without OSCAR 13 or Phase 3D When the orbit of AN SAT-OSCAR-13 finally decayed late last yean many had hoped that Phase 3D would soon be launched to lake its place. P3D was scheduled for a ride to space on the second flight of an Ariane 5 rocket from French Guiana. The first flieht of an Ariane 5 ended in disaster on June 4, 1996, The Ariane 501 rocket performed perfectly, but the software failed in ihe inertia guidance...

Bnb

TIRED OF IRONING PCB ser ce No S setup, Iree scanning available. FIRST PftOTO. 4201 Universuy Drive 102. Durham NC 27707. (919) 4036243. BNB5005 Audio Equipment wanted. 1930s-1960s Tube-type amplifiers large or small speakers, mixers, microphones, tubes pans, etc Especially Western Electric Jensen. Maraniz. Macintosh. JBL. 0IC 1 BOO-251 S4SA BNB2Q2 HEATHK1TS WANTED Premium prices paid for unassembled Heathkits. Rob W3DX 304) 971-6812 evenmgs or Robcap aol com) BNB206 wanted Manuals receiver...

H F Antenna

P.O, Box 52 Greenbank ON Canada LOG 1B0 pgebhardt Compuserve.com Not everyone has the opportunity to put up a tower with an HF beam on (op. The problem may be space, it could be local law, or it might simply be money Whatever the reason, if you don't ha e a lower and a beam, that doesn't mean you are limited 10 djpotes, single-element verticals, or random-length wires. You too can have a directive antenna. Its a matter of taking a iesson from commercial broadcasters who use phased verticals as...

The Table Topper Meter

Marris G2BZQ 35 Kingswood House Farnham Road Slough SL2 IDA England UK Man amateurs and SWLs 11 nd it very difficult, if not next to impossible, to erect an effective 160m antenna. First, there arc those in no antennas here zones. Others do not have the space to erect an effective conventional antenna. And anv who live in an urban environment will probably have to exist w ith a high noise level anyway, which mas be so high that the band is impossible to use. At my QTH I do not have...

Mwbmh

Photo , (iOKt ill get up San Harth KA6UDZ lefti and Don Lew is KF6GQ (rightt think Tonya is sitting tm the hidden transmitter (photo by Steve Harris KD LVl 73 Amateur Radio Today November 1997 77 Photo A. Serious HF antennas at the K. DX Fie hi Day star km needed some minor repairs as the competition began. Photo A. Serious HF antennas at the K. DX Fie hi Day star km needed some minor repairs as the competition began. characteristics of the first Kriane 5 in those 30 seconds, bin some data...

Info

Ali-Mode Operation SSB W.AM.AFSK.FM on all HF amateur bands and 6 meters. JST-145, same as JST245 but without 6 meters and built-in antenna tuner MOSFET POWER AMPLIFIER Final PA utilizes RF MOSFETs to achieve lov. distortion and htgh durability Rated output is 10 to 150 watts on all bands including 6 meters AUTOMATIC ANTENNA TUNER - Auto tuner Included as standard equrpment. Tuner settings are automatically stored in memory for fast GSY. MULTIPLE ANTENNA SELECTION Three antenna connect lions...

End

220 REM Note that ycur experimental results may differ somewhat. If your radio quits at 72 hours, for instance, and the computed answer was SO hours of projected operating time, then change Line 130 to X Ah AC -8. This adds a bias to the program to compensate for the actual parameters of your particular Gel Cell battery. Batteries will change Ah capacity with age, temperature and percentage of charge time since last recharge . AB5R amp S GELCELLMAS program see text . with NiCd and NIMH cells J...

W

A-TO UEDs, RGURE A B - TO hOSE MAKER, FIGURE 5 C - TO RRST METER 5TTP, FIGURE 6 0 - TO SECOND MfTTER STEP, FIGURE 6 E TO THFRD METER STEP. FIGURE 6 f - TO METER DRIVER, FIGURE 6 QL Q2, and Q3 to lurn on. When Q2 turns on, current flows through R2 as w ell as the base-emitter junction of Q3, turning it on. Q2 and Q3 form a complementary pair in this case, a direct-coupled NPN and PNP transistor. When Q2 turns on, it causes Q3 to lum on. which supplies citrrent to ihe part of the Box selected by...

Bv Warren Dion Nbbh

FOR GEL-CeLLS or LEAD ACJO BATTEHIES. Fstttuies Precision Temperature tracking voltage reference amp three mode charging sequence. Standard Kit is for 12V 1 2 or T Amp. user selectable. Can be connected to the battery indefinately. wilt not overcharge Weighs 2 pounds and measures x S -D t Finished Assembled amp Tested 79 95 CA Residents atid 7 75 sales ihx S amp H. 5.00 insured . Forotgn orders add 20 For mom into or price hst send togal site A3E 55c to 2521 W. Le Pflirna K - ArwiWim, CA 92S01...

Painfull Y Bright Red

T 1 3 4 5 mm diameter fed LED Significantly brighter than conventional LEDs Water dear m oil-slate, A j on 10 for 5.00 100 for 45.00 1000 for S 400.00 Panasonic EAS65P76A3 8 ohm 0 A wait speaker wiih sofi-edge paper cone proOucFng good sound Quality. 0.93' overall depth 2.25 wire leads with 2 contact O.r spacing socket connector Large quantity available Motorola MC34119P Low power audio amplifier suitable for speakerphones or talking picture frames. Operates on 2 16...

It

Steve built a tiny two-milliwatt device to fit inside a bikini top. It is just a little oscillator Ehat I originally designed to run on nine volts, Steve says. 4iThe lotteries arc on one side and the oscillator on the other. I ran fine w ires in the string strap from cup to cup for power, and around the back for the antenna. This gives the signal horizontal polarization. The negative power lead serves as the counterpoise, The nine-volt battery wras too big and uncomfortable so I redesigned it...

Programs For The Baypac And Baycom Modems

DOS only - Windows must be shut down Freeware - support possible from newsgroups www.tigertronics.com or comes with modem Good if using right setup see text Complex setup did not perform with my laptop all www.peaksys.demon.co.uk Winpack most ham boards Software works but my laptop gave problem Table I. These are jus i a few of the available programs for the BayPuc BP-2M and BaxCom modems. The only definitive commercial package is the BayCom 1.6. Haven't tried it. The authors of most of the...

Dtmf Controller An D Decoder

Dreodet and Stores Si digit High speed Decoder Up Id lone Runs on a 9V taller or 7 2 io 15V L gt ijriLaJ display DTMF Controller fj miipul H ni Vkhich utr irammor ouijmi and f is methanicil relay 4625 Production Drive. Dallas, Texas 75235 Phone 214 3504 888 7isa MC Accepled. Pius S. H, Tax if Applicable CIRCLE 276 ON HEADER SO VlCF C PtD 73 Amateur Radio Today November 1997 81 Remembering Ivan's 'Woodpecker I had 3 dream last night about the woodpeckers of yesteryear, and I awoke very troubled...

Model

Toll-free Order Service 1-800-446-2295 Sorry no technical info or order sLitus a Ihis iurree lt For Tech Info or Order Status, Call the Factory Direct Phone 716 924-4560 Fax 716 924-4555 R Illuminator for CCD Cameras p p H See in total darkness with one of our CCD video cameras and this IR illuminator IR light can't be BB tMB seen, illuminate the scene with IR and a CCD camera Bj H 'sees' just fine- The array of 24 extra high intensity LEDs are invisible to anybody - except for aEiens and...

Variable Current Load Bank

A bright idea for testing power supply parameters, Dave Evison W7DE 153 Park Avenue Palo Alto CA 94306 Few of us would tempi fate by playing Russian roulette with a loaded revolver, but we play a similar game of chance with our solidstate rigs when we connect them to untested power supplies. Simply measuring the unloaded output voltage of a power supply is not enough. The sharp drop or rise of output voltage from a poorly regulated supply can cause serious damage to equipment operating from it....

Electromagnetic Measuring Tool

New TriFieid Broadbarxl Meter combines a broadband field strength meter with an AC magnetic amp electric fieid meter fn a single package Rf flqFd strength setting vertical. 10-1000 V m 100 KHz -2.5 GHz is ideal for making near-field transmitter measurements, finding RFl on a line, testing leaky microwave ovens or finding hidden surveillance bugs. AC magnetic setting 0 2 -100 milligauss 60 Hz, range 50 H -100 KHz full 3-ax s magn iudei tests for magnetic interference a sometimes nasty but...

Hf Baycom Psk Modem Amateur Radio Vk4aoc

17 Readin Writin and Robotin1 - Gray fs your high school enteredin FIRST Pop qmz Who can state the Pythagorean Theorem 21 Electronic Construction from A to Z - AAQXI VK5FN Everything you wanted to know stxmt building stuff but were afraid to ask. 27 The Table Topper 1 amp 0-Me1er Loop - G2BZQ How about making a great gift gadget for grandkids 46 A Baycom-Style HF PSK Modem - VK4AOC.VK4TN 71 Variable Current Load Bank - W7DE A bright tcfea for testing power supply parameter

Baycom Style Hf Psk Modem

Psk Circuit

Austen Harris VK4TN c o Gold Coast Amateur Radio Society, Inc, PSK packet What the hell is PSK packet, you might ask Well, for a sian, PSK stands for Phase Shifl Kc gt ing. PSK has cjuiie a lot going for it. especially when you want to run highspeed traffic on a reliable path. 12.00 baud on Hi isn't a problem at all. Faster baud rates are quite possible. Our first introduction to PSK packet came about when the QDG Queensland Digital Group asked us to consider set-ling up a PSK link to VK7 as a...

Pins

Two pins are pushed through the rod. as shown in Fig. 3. forming the connecting point for the diodes and the pickup coil ends. The number of wire turns will depend on the type of meter and TX power used see below . No ground connection is required for the loop, although of course the TX and RX should be grounded. The loop's narrow bandwidth ensures thai no harmonic output, or TVI, can be detected when you are running about 15 watts CW. CIA and B have been found to be okay w hen...

Solder

Fig,Mounting feed throng h capacitors. boxes ih t come with more than lour screws. If you are either er intrepid, or a bit of a fool tike me. then you might want to consider making your own boxes . One of the neat things 1 learned to do in junior high school metal shop was operate a bench brake. This tool allows you to clamp a piece of sheei metal between two surfaces, and ihen using a pair of handles, route one surface upwards, producing a bend up to 9 ' degrees in the met Lit. B gt properly...