Isq

1M344 * The Radio Amateur Antenna Handbook by William Orr WaSAI Stuati Cowan W2LJC Yagi beam theory, construction, opcrjtion. Wire beams. SWR curves, Matching systems A L'must'' tor fifcrious DXers 11,50 I OA 346 * Simple, Low-cost Wire Antennas for Radio Amateurs hv William Orr W6SA1 ' Smart Cowan W2LX tennas inexpensive beams hInvisible toujh antennas for hams in local ii ns Sew data. 10A 342 * All About Vertical Antennas by William Orr W6SAtf Stuart Cowan W2I.X Effective, low-cast verticalb...

Call Or Write For More Information Today

2064 Eastman Avenue, Suite 113 Ventura, CA 93003 Phone (805) 642-7184 GSI is a registafsd trademark of Cflfinecl Systems Inc circle 12 on reader service card Wayne, thanks for laking Ihe time lo chat with me over the telephone last week enjoyed meeting you With any 1uckr we should have about 20 new Novices at Ihe Reidsville Middle School this fall. Today the senior high principal told me that her head custodian and one of her assistant principals have requested release lime so they can attend...

Cjrcle On Reader Service Card

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, ive should receive ft by October 37. Provide a dear, concise summary of the essential details about your Spectat Event Check HAMFESTS on our BBS (603-525-4438) for listings that were too iate to get into publication. Boxboro, MA on Oct 13 & 14 Brooklyn Park, MN on Oct 27 PERfllS, CA The Lee De...

Visa

R 9000 l(MKHz-2GHz alt-mode rcvr 5459.00 4699 Due to the size of the ICGM product fine some accessory items are not fisted If you have a question, please call Prices subject to change without notice. Top Trades We ll take your Clean Late Model gear in trade towards New COM Equipment. I limitedOftetL. FREE BP 82external 12 1 3Q0ma battery w IC-2SATorlC-3SATpucha e. b HF -F I ' j Regular Sate IC-228H 45* 2m FM TTP scan (Specmf) 539 00 419 C-229A 25vk 2m FM TTP mic . 49 3S9 IC-229H 50v, 2m FM TTP...

OCT

AUGUSTA, GA The ARC of Augusta will sponsor the Augusta HamfestiComputer Show al Ihe Augusta-Richmond Co. Civic Center Sat from 9 30 AM-5 PM and Sun from 9 30 AM-3 PM, Ouldoor Flea Market. One mllgaiing space free, extra adjacent Apacaa Set-up at 5 AM Sal,, 7 AMonSuri Admission S4 advance. S5 at ihe door Dealer 10' booths 40 ea Flea market 8J tables 10 oa Ma o checks payable to Amateur Rndlo Club ol Augusta and mail to Jirp Abercrom-tle, PO Box 5943, Augusta GA 3090G r 404) 790-7802...

Pks

Unique operating features with a proven hardware and software design make AEAs PK 88 your best choice in packet radio-now with MailDrop* an 3KByte efficient personal Mailbox. The PK-88 also allows mufLipte single frequency QSO'sr digipeating and networking, it s a superb value, packed w.thaii the most needed packei radio features such as direct interface capability with NET ROM and TCP IP In addition to a1' the features of a standard' TNC the PK-B8 offers features not found in any other TNC...

An Easy to Make Meter Antenna

Make a strong J-Pole from an old TV antenna My new 2 meter rig, just purchased at a swap meet, needed an antenna. J wanted something that I could put on lop of the 30-foot mast that supports my inverted vceV I first considered aground plane u ith a K whip, hut then J came across an old TV antenna with a folded driven element. I immediate saw u J*pote, already made except for cutting out and mounting This version of a J Pole antenna will withstand wind and weather. And, since the J Pole docs not...

Circle On Reader Service Card

WHEN IT'S A TAD M8 FM TRANSCEIVER COMMERCIAL & AMATEUR BANDS IN ONE UNIT 11 (led for MARS, Vol. Fire, EMI, B'casl RPU, Police, etc. 1 Fully Field Programmable -99 Channels 1 True 40 Wad Power 11 (led for MARS, Vol. Fire, EMI, B'casl RPU, Police, etc. 1 Fully Field Programmable -99 Channels 1 True 40 Wad Power Shippec Complete w Mire. Mobile Slide Itonl & Power CaWe Base StaH ri P.S., mo& iJe Antennas etc, in Stock Multi Function LCD display Frequency Range 138-174 or 430-460 mHi FCC a...

Arrl Books

Aft22O0 * Antenna Impedance Matching by Wilfred A. awn Vlvanced a matcitrs, an tc n lift d cif i y i i engineers. technicians. Most comprehensive btiok written on usin Smith Chans in solving impedance mate h i ng proh I em s. it 5 fH I R2472 Tone in the World with Ham Radio Kit (Sth ed) lira rid New Edition Palter to read, revised lejtf ct> vers 'lie question pools on Novice exam- given on Nowtmbqf I r and laser. C ode Leadline and code-practice cassettes included in the kit AR2464 Tune in...

Ap

Marc I, Leavey, M.D., WA3AJR 6 Jenny Lane Baltimore MD 21208 Does Ihe word confused mean anything lo you How about befuddled or frustrated 11 11 not. you may never have been r> the position of an amateur venturing into digital communications for the first time. Lei me Lake a case in point I just received a teller from Curtis L. Shiffer WDfflELK of Des Momes. Iowa, which kind of sums things up CurliS writes I bui a terminal unit for RTTY several years ago, but it was ven bard to tune in RTTY....

Tripp Lite

The new Tripp Lile EPG-1200 is a solid-state, 120 VAC elecironic power generator designed io take the place of gasoline-powered generators during blackout conditions The EPG 1200 provides clean, quiet, safe emergency power in a compact unit where the pollution, fumes or noise of such a generator are unacceptable or impractical, It supplies up to 200 waits of regulated AC power from the user-supplied battery pack. Simple, manual switchover operation powers equipment during blackouts for extended...

All Sales Final

Amentron, Antenna Specialists. Astaiic. Astron, B K B W, Bencher, Bird, Butiernut, CDE CES. Cushcraft. Daiwa. Eirnac Henfy Heul Husller H> r-Gam Icom KLM Kanlroncs. Larsen mfj. J W Miller, Mirage, Nye. PaJomar RF Products, Saxton, Stiure, Tempo, Ten-Tec, TUBES. Yaesu. Vibroplex, Dupiexers, Repeaters, Scanners, Radio Publierions Uniden Kenwood Maxon. rfc. we now stock commercial communications systems HAW DEALER (SQUIRES JNVFT D PHONE EN VOL< R ORDER & BE...

S

* US Military Communications (Part 3) rhih par completes he vast overall requency fist of US Military m.t from KC to 27 944 CC 78 pages. SEWi) 1990 Shortwave Directory 6th Edition Vn excel le ii I reference for North American shortwave listeners, this > Xer bible is crammed with up- -da Le. accurate frequency and ser formation from IdKhtz to OKU 19.50 fii.- 343 * All About Cubical Quad Antennas by William Ott W6SAf Stuart Cowan W2LX The Classic (in Quad design 1 beory, const run inn,...

Motorola Radius

For the discriminating amateur involved in commercial communications as well. Meet significantly tighter commercial specs * 3 year warranty by Motorola, an added year provided by Procomm. * Mobiles handhelds and accessories to meet your amateur commerciaf needs simultaneously. Motorola Catalog 10 refundable with purchase. it .-in . 4Iiii jni n-rrd MVlif- 1948 Coventry Ct Thousand Oaks, CA 91362 Phone 805*497-2397 it .-in . 4Iiii jni n-rrd MVlif- TX RX. 10 meter, VHF, UHFand Microwave bands

Product Of The Month

The AR-470D from ARtfAmen can Reliance Inc. is a convenient drop-proof hand-held device that has all the features and benefits of a bench-top LCR meter at onty 20 o the price it displays a fast reading of inductance. capacitance or resistance on its 2000-counu 3Va digit, liquid crystal display. It provides seven inductance ranges from 200 pH to 200H, nine capacitance ranges from 200 pF io 20 mF. and eight resistance ranges from 2 ohms to 20 megohms, offering a maximum resolution of 1 mil-liohm,...

Kenwood

Large, easy-to-read multifunction LCD display With night light. Jr, Audible beeper to confirm keypad operation. BT-5 AAcell manganese alkaline battery case W Bl BC-7 rapid charger BC-8 compact battery charger SMC-30 speaker microphone SMC-32 mini speaker microphone SC-12,13,27 soft cases f m RA-3,5 telescoping antennas RA-8B StubbyDuk antenna TSU-4 CTCSS decode unit VB-2530 2m, 25 W amplifier 1-4 W input MB-4 mobile bracket BH-5 swivel mount PG-2V extra DC cable PG-3E...

Problems

Spectrum Probe Mhz

The frequency domain approach can often show problems clearly, which only close examination in the time domain with exotic equipment will reveal. For example, a circuit used for digital scope evaluation appears to produce the square wave of a 4-bit counter. The signal has a fast risetime around 1 ns. and some overshoot like that found in any digital system. This viewed on an analog 100 MHz scope is shown in fig, 7, Looks conventional, doesn't it The same signal is then applied to the Spectrum...

Fax

2n930 Dipmeter

C,L, Houghton W amp 61GP San Diego Microwave Group 6345 Badger Lake San Diego CA 92119 Last month I covered a temperature control circuit that could be used for a crystal oven control circuit. This month the topic is a crystal oscillator circuit I used In conjunction with the temperature control circuit. The circuits were built to supply a reference frequency for control of a 6 GHz microwave brick oscillator. The bricks normally require an oscillator in the 90 to 108 MHz rangeh with some...

Chester Qsl Cards

Chester QSL Cards now offers you the ability to order GSL cards on-line using their new Bulletin Board System. You can also monitor your order and obtain current information regarding shipping dates, By using the BBS, you can save 5 on your order to help offset the cost of your call. You can also request free samples or order form packets. The only terminal requirement is the ability to display 60 columns and 24 lines, You may access the bulletin board from 6 p.m. to 6 a.m. CST Monday through...

Rotary

Tance and inductance are low Q Some designs use an additional fixed coil just for 10 meters, sacrificing variability for higher Q. In my commercial tuner t on 10 meters most of the circuit capacitance and inductance come from stray sources in the wiring or the component construction. Just convening its design to the SPC circuit would not achieve much, but the conversion would lengthen the 14-inch long unit by another 10 inches by replacing the single-section capacitor with a split-stator...

Circle On Reader Service Caro

Andy MacAHister WA5Z B 14714 Knightsway Drive Houston TX 77083 On July 16th of this year, Pakistan joined the ranks of those countries with satellites transmitting within the amateur bands. Launched on a Chinese Long March rocket, BADR 1 was lofted into a low-inclination elliptical orbit. Many stations were surprised when UoSAT-type data was heard unexpectedly on 145.825 MHz FM, Early information from Dr. Martin Sweeting at the University ot Surrey in England indicated that the satellite was...

He Zed Loop Special

An inexpensive HFbeam with a new twist The 'ZL Special antenna, named after ZL3MH who first designed it, is well-known to enthusiasts who want a simple, easy-to-build, inexpensive, high-perform-ancc wire beam. Basically, ihe ZL Special consists of two folded dipoles fed out of phase to provide a strong radiation lobe in one direction, and signal cancellation off the back. It is a slightly different version of the famous SJK antenna designed and published by John Kraus WSJK in the 1930s. John's...

Superfast Morse Code Supereasy

Subliminal cassette. 10 LEARN MORSE CODE IN 1 HOUR, Amazing new supereasy technique. S1D. Both 17. Moneyback guarantee. Tree catalog SASE. Bain. Dept 73-4. 1 196 Citrus, Palmbay Ft 32905. BNB531 SB-220 221 OWNERS 20 detailed mods wtiEcfi include 160-S meter operation, QSK. I-enhanced p,s. 50 rebate tor new mods submitted 9 pages of 3-50QZ tech info. Si 1 postpaid. Info. SASE, BOB KQ2LAREK WA2SGQ, Memorial Place, Elmwood Park MJ 07407 BNB501 ROSS1 SS S USED October ONLY SPECIALS KENWOOD SM-220...

Of Maryland

8524 DAKOTA DRIVE, GAITH R5BURG, MD 20877 If you've bought a new 2 meter rig in the past couple of years, chances are the radio has more capability than you realize. While you're driving down the interstate ray-chewing with the gang on the repealer. it might pay to check out the action oil the rest of the Vlll spectrum your radio can receive. Almost al l new 2 meter mobile and hand-held radios arc capablc of tuning in the 138-144 and 148-174 H bands above and belowr the 2 meter amateur...

Info

The t'eedpoint impcdance was such that I had a VSWR of 1.4 1 at the 28,500 MHz dtrsign frequency. This was maintained till the way down to 28.000 MHz, The VSWR increased to 2 1 at 28,8 MHz yielding an effective bandspread of about 800 kHz for this antenna. Perhaps by centering ' it a bit higher, couid have easily covered the entire 10 meter band with an acceptable VSWR. As a matter of fact, I have used it on 12 meters with an antenna tuner and received excellent reports, k does appear to have...

The Yaesu FT

A hot performer loaded with features. Yaesu USA 17210 Edwards Road Cerritos CA 90701 213 404-2700 Price Class 3400 Photo A. The FT-1000 is a lot more complex looking than it is operating. Easy to use ou ve seen the photo ads in all the magazines and now it's here the Yaesu FT-1000 transceiver. It's big, powerful, loaded with features, and expensive. The last point is relative, as everything seems expensive these days. Among the top features of the FT-1000 are dual frequency reception, a full...

Lm317 Current Limit Circuit

Versatile solution for your power supply needs. hen 1 get involved in projects, I never seem to have enough power supplies to go around. When one's available in my shack, it's usually the wrong voltage, or it lacks a feature 1 need for the project. Building this versatile supply solved my power supply problems. This power supply provides a fixed 5-volt output suitable for TTL logic and a variable voltage output ranging from about 1.2 volts to 21 volt, , which is suitable for almost anything...

Spain

Woodson Gannaway N5KVB EA Apartado 11 35450 Santa Maria de Guia Las Paimas de Gran Canaria Islas Canaries Spain Good news for four of the members of Union de Radioaficionados Las Palmas URL in the Canary Islands. They were advised that they had won their class in the Associazione Radioama-ton I tali an i ARI International DX Contest. The four con testers are alt active members of the URL. Elsa EA8BVH has been an amateur since September 1988, and in this short time she has won atmost every...

Brian Beezley Ksti

K6STE has released a new MNC program for iBM-compatible computers MNC uses optimized, hand-coded assembly language in the kernel code of the MINI NEC algorithm, substantially improving performance Unlike com piter-generated code. MNC uses inline coprocessor instructions for maximum speed. In addition, MNC makes full use ot ihe on-chip coprocessor stack to minimize slow off-chip memory accesses Where possible, MNC maximizes parallel execution ol host processor and coprocessor instruction...

Ooo ooo

Uniden Corporation of America has purchased the consumer products line of Regency Electronics Inc. for 12,000,000. To celebrate this purchase, we're having our largest scanner saie in history Use the coupon in thisadforbig savings. Hurry, offer ends January 31, 1991. it it ir MONEY SAVING COUPON it Gef special savings on the scanners tisted in this coupon, This coupon mtt t be included with your prepaid order Credit cards, personal checks and quantity discounts are excluded from this offer....

Suparco

Sweden 73 troubleshooting 58 UHF RDFing 52 vernier drives 59 VFO shifting frequency 59 W1XU Jim Gray 26.41,85 W4RNL, L.B. Cebik 22 W5KNE1 Bob Winn 50 W60WP, FA Bartlett 46 W6WTU, Hugh Wells 10 WA3AJR, Marc I Leavey, M.D 78 WA4BLC, Bill Clarke 18 WA5ZIB, Andy MacAltister 76 WA6ITF. Bill Pasternak 60 WA6RKD, Gil Pries 17 waveguide 64 W82MGP, Carole Perry 56 WB6IGP, C.L. Houghton 64 WB6NOA, Gordon Wes 38 WB8ELK. Bill Brown 14,34.54 W68VGE, Mike Bryce 59 WB9DYI. Michael Hansen 28 Yaesu USA 18...

Decoder Cw Con Lm567

Lm567 Pitch Decoder

Add the feature the manufacturers forgot. Before transceivers became state of the art and the receiver arid transmitter were separate entities, zero beating a CW transmitter to the station called or worked was a simple matter Brielly switch on the VFO, and .ero in on the incoming signal When transceivers appeared on the scene, difficulties arose. In early designs. tuning for an acceptable r eat moved the transmitter frequency so the two stations ended up a heal note apart. Modifications...

L Stock

Simple 2-piece aluminum transmatch case present 154-12 unit is equivalent to the 1950s 50E45, while the 154-508 splh-stator model is Lhe old 50ED45. Bath units have 52 to 53 pF as their maximum values and 10 ro 11 pF as minimum values. Capacitance meter measurements confirmed the figures. New units cost above 35 and 60, respectively, but you may be able to find good quality units of either model at hamfests. What gives these units their low minimum values is the use Of trapezoid end...