Info

WVP-2A wattmeter covers 50-160 meters. 20 200W SWR bridge 99.50 W-1 wattmeter covers 160-6 meters 200 2000W. SWR bridge 69.50 WV-1 wattmeter covers 50-160 MHz. 20 200W. SWR bridge 69.50 PS-20 VOM & wattmeter 20K per Volt VOM 20 200 2000W 69.50 PS-10 VOM & wattmeter 10K per volt VOM. 20 200W 49.50 S-2 power meter covers 160-2 meters Full range SWR bridge relative power meter 39.50 Dentron's ultimate tuner For coax, random wire, and balanced feed systems, built-in antenna selector switch...

Ham Help

1 am interested in obtaining information on the World Radio Laboratories Modef SB 175 transmitter. I am particularly interested in converting the DSB to SSB, and wouid also like to know about any other successful modifications that have been made to this unit, 1 am also interested in obtaining a schematic on a digital frequency display for the FRG 7 receiver, using either an external frequency counter or a sepa rate readout. Rex D. Faulkner 3413 Covington Drive Augusta GA 30909 1 would like to...

New

For 199.95 you can run up to 3 KW PEP and match everything from 1.8 thru 30 MHz coax, balanced lines, random wires. Built-in balun, SWR, dual-range forward and reflected power meter. The HEW MFJ-981 3 KW Versa Tuner IV lets you run up to 3 KW PEP and match any feed line continuous from 1,8 to 30 MHz coax, balanced line or random wire, m.m i-. -j i if . J__ . . .i .' This gives you maximum power transfer to your antenna for solid GSQ's and attenuates han monies to reduce TVI and out-of-band...

Amateur Radio In Japan

The following information comes from an interview between Jan ShilJtngton N9YLand Jun Okamura JA2BJW which appeared in the Wheaton Community Radio Amateurs, Inc., bulletin which is edited by N9YL. It should greatly increase your knowledge of conditions in Japan. Q. How many hams are there in Japan A, There are 355,757 stations (CB 367,633) as of December, 1977. Q. How many classes are there in Japan A. Four classes First Class, Second Class, Novice-CW, and Novice-Phone. A. Four countries J A,...

Autodialer

Internal Nicad rechargeable battery pack 8 permanent numbers stored in custom prom (available ior 4.95 includes all features of AD-1 except interfacing Amateur net price 89.95 119.95 with batteries and charger Comes with matching resistor network, suggested auto dialer schematic and operator mslructions Wired and tested panted circuit board with chip sei available for 49 95 12 button key pad available for S9 95 For more information, contact your favorite ceaier or the factory

Overvoltage

Although few hams build their own transmitters and re* ceivers as in the days of AM, there is much home brewing in the area of station accessories keyers, computers, test equipment, etc. Power supplies are popular to build so that the 2-meter rig can be used at home as well as in the car, Power supply circuits are so common and many hams have a false sense of security, particularly with the new 3-terminal regulators with thermal shutdown, current limiting, etc. Unfortunately, overvoltage...

Getting The Crowds

Dayton knows how to get 'em out by the thousands, but many other hamfests are floundering. Prizes are nice, but how many hams will drive 200 miles to take a slight chance at winning a rig Not many, if Dayton depended on the prizes to bring in the customers, the mobs would stay home. The more established ham-tests have to keep growing to survive. We've watched the bungling of SARGC into obscurity. It grew smaller and smalter every year, despite lavish prizes Other hamfests have been withering...

Hi Ih

Ail ccrr.ponent IOC* Pnme Sftd GUARANTEED Mas ter Ch a rge W s J A ccep fed M 51 Btifofd HH> Ai tant* G A .W34 Ail ccrr.ponent IOC* Pnme Sftd GUARANTEED Mas ter Ch a rge W s J A ccep fed DIGITAL READOUT FOR YOUR YAESU FT-221 221R YC-221 Digital Display. Only 69.50 plus shipping. Kit for older FT-221 s 3.00 plus shipping. Dutlt by Yaesu. ( iillfnmut ffuJrtif*. fldii winp tni ht i Tiwr ifflifT. 13401 South Hoover Street Qordeno, CA 90247 10 METER CONVERSION KITS FOR CB RADIOS AM and SSB Kits...

New Mfj Kw

For 159.95 you can run up to 1.5 KW PEP and match everything from 1.8 thru 30 MHz coax, balanced line, random wire. Built-in balun. SWR, dual range forward and reflected power meter. Flexible six position antenna switch. Outstanding value. Where else can you get a i,5 KW Tuner with SWR, dual range forward and reflected power meter, antenna switch and balun for only . . . The MFJ-961 1.5 KW Vera Tuner I gives you a flexible six pospon antenna switch it le is you select 2 coax lines thru tuner or...

Icom Canada

7087 Vicuna Drive Vancouver B.C VSP3Y9 Canada (604) 321-1833 Take one look at the new Daiwa CN-720 swr and power meter and you'll realize that it's something unique among ham shack accessories. Unlike other meters, which display only one or two transmitter parameters, the CN-720 simultaneously displays three important quanth ties forward power, reflected power, and swr on a single dial face. Very convenient. Actually, the concept of the Daiwa metering system js so simple that you'll wonder why...

Pa Ck A G

2 watts IN-25 watts OUT 4 watts IN-35 watts OUT (typ Scarcely larger than a pack igarettes Tucked away out-of-sight in your car (or motorcycle ), the PA 2-25B gets you mobile with a big boost in power A perfect companion to the new hand-held rigs, too. Plus Full Band Coverage, 144-148 MHz, FM and CW Efficiency, draws only 3 to 4 amps 13.5 VDC Easy installation, RF in out and fused DC line TREAT YOURSELF TO ONE OF KLM's SMALL PACKAGES -THEY'RE AT YOUR LOCAL KLM DEALER, NOW. KLM > 7025 LAUREL...

Broadband Uhf Yagis

Cushcraft Corporation has announced 2 new broadband Proline 6-elemenl yagis for UHF service. Both models offer 10-dBd forward gain. 20-dB front-to-back ratio, 10-MHz bandwidth, and 50-0hm UHF connector termination. They come complete with hardware for versatile end-mount installs tions. Designated models P456-6 (450-460 MHz)and P467-6 (460-470 MHz), they require no tuning and are ideal for situations where relatively inexpensive yet durable antennas are required. For further information,...

New Digital Pulser Probe Announced By Dynascan

The B& K-Precision product group of Dynascan Corporation has just introduced a new digital pulser probe, The new unit, designated as Model DP-100, is designed as an aid to fast analysis and debugging of integrated circuit logic systems. The DP-100 generates a single pulse in the iJone-shotM mode or a 5-Hz pulse train in the continuous output mode, Sim* pie to operate, the DP-100 can be used alone or in conjunction with a logic probe or oscilloscope, When the probe output is applied to a...

Selection

BOX 73 WATERTOWN, SOUTH DAKOTA 57201 Many hams have built the VHF Engineering 2 meter HT144B kit, which has proven itseif an excellent handie-talkie. Here are modifications that will make it easier to service and use, therefore enlarging your total enjoyment of 2m FM. Described will be how to 1. Modify for simplicity of crystal changing and repairs. 2. Add a drop-in battery charging facility. Provide for an external microphone and earphone. 4. Replace the antenna...

Dx Profile

This month we profile not a who but a what, the Northern California DX Foundation. If you are not a member, you are missing our Drop a note to Box 717, Oakland CA 94604, for complete information on how you can become one of the deserving ones. The NCDXF was started In 1972 by K6KQN. Its purpose . to assist radio and scientific events with funds or equipment, it would be supported by donations from those who benefit. It would provide a central point where funds couid be collected and dispersed...

Pi N Recorded

EFEP NtE ASD WtTCHIhG WAVEF1D TM GENEUMOH passing up from the ground and then absorbed again upon returning down towards the receiver. During active auroral events or after solar storms, the absorption of radio waves at MF and HF is frequently so high that no signal is received on the ground, and the ionosphere is said to be in blackout condition. It is so-called because the lonosonde record shows no evidence of returning pulses It is just during these events, however, that so much of...

The Upnorth Department

Friend of mine, t fifsi met Ward in 1972, about a month after moving to the southland, in fact, one of the very first Looking West columns announced his engagement. Since then, Ward and his wife Barbara have relocated in Camino, California, where Ward operates his own dental laboratory, 1 had not heard from Ward for a long time, until the other day when our postal lady'' delivered a rather interesting note from him that i wish to share with you. it concerns a 220 repeater project that Ward and...

Instant Software Has it ail

Ask for Instant Software at your local computer store, use the handy order blank provided at right, or order your software by phone call Toll Free 1-800-258-5473. HAM PACKAGE i This versatile package leis you solve many ol the commonly encounteied problems in electronics design Wllh youi Level 1 4K or Level II 16K TRS-00, you have a choice ol Baste Electronics with Voltage Divider Solve problems Involving Ohm's Law. voElage dividers, and AC time constants, Dhpole and Yagl Anlennas design amends...

Amateur Electronic Supply

Fond du Lac Ave Milwaukee, Wi 53216 Phone 414 442-420C Wisconsin WATS 1-800-242-5195 Nationwide WATS 1-800-558-0411 28940 Euclid Avenue BRANCH STORE ERICKS0N COMMUNICATIONS, INC. Wickliffe, Ohio 44092 621 Commonwealth Avenue 5456 N. Milwaukee Avenue CLEVELAND area ORLANDO, Florida 32803 CHICAGO, Illinois 60630 Phone 216 585-7388 Phone 305 894-3238 Phone 312 631-5181 Ohio WATS 1-800-362 0290 Fia.WATS 1-800-432-9424 Outside Illinois 1-800-631-5802 Custom configurations are no problem...

Model Hgss Crank Up Tower

Hy-Gain Electronics, a division of Telex Communications, Inc., has announced the Model HG-52 sett-supporting tower. The HG-52SS is designed to support 9.0 sq. ft. of antenna area with winds up to 50 mph, This all-steel tower has the advantage of an improved guide system which allows the tubing to be open at each end, ensuring complete galvanizing and total moislure drainage. The HG-52SS will accommodate standard rotators. A thrust bearing can be botted to the top section to allow a 2-inch mast....

West Walnut Compton Ca

Biff Pasternak WA6UF 24854-C Newhaif Ave. Newhali CA 91321 Biff Pasternak WA6UF 24854-C Newhaif Ave. Newhali CA 91321 Attention, nostalgia buffs-have we got something for youf As many of you are aware. K6MYK now WR6ABN was one of the nation's first successful amateur repeaters. Jt has been in almost constant day-to-day operation since the spring of 1956, Anyway, in doing research for a new FM and repeater book, I spent a bit of time with MYK's designer builder licensee Art Gentry W6MEP. During...

Note

THE .OSS 01 lUD't amp OOfcHl TO USA BftOADCASnWp THf REST wTO OTHER i VICE5 0 METti BXH0 963 SHA1E 3 FfJfiE jH Novice, QRP, 200 w, deluxe good, better, best 299, 369, 399. 699, 869. 899, 1069. TEN-TEC has them alL A choice of seven HF transceiver models a choice of power levels a choice of operating features and accessories for beginner or old timer. Best of all, there's a wide choice of prices to fit every amateur budget. TEN TEC MOMNr TRANSCEIVERS - REALLY CHOICE, Top of the line. Deluxe in...

Meter

Switch in the AM position Connect a dummy load to the antenna connector through a power indicator Now, while keying the mike, adjust L2 for maximum output of rf, This will be fairly low, perhaps less than 1 Watt. Next, in order, tune coils L3, L4, LSh L7. and Lb tor maximum rf output. In the AM mode, full output power is about 3.8 Watts with 13.8 V dc supplied. Switch the mode switch to USB and whistle into the mike. About twice the rf should be indicated on the output. Remember to check the...

O

Remember, you can Call Toll Free 1-800-633-3410 in the U S A, or call 1-800-292-8668 in Alabama for our low price quote. Store hours 9 00 AM til 5 30 PM, Monday thru Friday. Covers 10-80 meters, 26.5-39.0 crystals supplied. modes LSB. USB, CW. and AM. input power lOOW SSB and CW DCr single knob tune up with variable control 100 KHz calibrator receiver offset tuning. RF attenuator, noise blanker, fixed audio peak filter tor CWn 135 VDC. seim-break-m wth side tone Power supply FP-12 optional List...

Deluxe Plugin Mobile Mount

With every 210 Limited Edition Transceiver. This Model DMK provides for easy plug-In and removal of the 21 Ox for mobile operation. Complete with DC cable, reverse polarity protection, circuit breaker, and mounting hardware. with every AC Console. Provide VOX and Seml-break-Jn CW operation. An Ideaf addition for the home station. To mark this impressive accomplishment Atlas is producing a special model of this remarkable transceiver.

Model Thdx For Meters

Hy-Gain Electronics has introduced the newest member of its famous Thunderbird line of trtband antennas. The TH5DX offers outstanding performance on 20. 15, and 10 meters. Jt features 5 elements on an 18-foot boom, with 3 active elements on 15 and 20 meters and 4 active elements on 10 meters. The TH5DX also features separate air-dielectric Hy-Q traps for each band. This allows the Unadilla 's new KW-80 80-meter antenna trap. Unadilla 's new KW-80 80-meter antenna trap. TH5DX to be set for the...

Wvz

Communications Corp. 1911 Olde Homestead Lane Greenfield Industrial Park East Lancaster, PA 17601 717 299-7221 dead triode amplifier stage, You look in and find that the plate load resistor is fried to a crispy color. What vvas it You can get a hint from similar circuits or maybe what else is in the set, but, if you want to get it going fast, it's easy. First check for other damage, like a shorted bypass capacitor that caused the resistor to draw too much current, or any other trouble in the...

Icd

Represent a significant new advancement utilizing the latest LSI design . . and because it's a DSI innovation, both in to sacrifice accuracy, ultra small readouts and poor resolution to get a calculator size instrument. Both the 100 HH and 500 HH have eight A inch LED digits 1 Hz resolution direct in only 1 sec. or 10 Hz in .1 sec. 1 PPM TCXO time base. These counters are Year Limited Warranty Parts 4 Labor, actory Assembled in LI. amp A, 7924 Ronson Road. Dept. G San Diego, California 92111...

Lmt

Note for early R-4C receivers, 1 Amp 50 piv diode not supplied 10-mH choke 0.01-uF disc capacitor 1000-pF silver mica capacitor 150-0hm resistor 12 RG-174 U coax Doubly-balanced demodulator product detector TL442 3 1.0-uFT 25 V dc tantalum capacitors 1000-0hm resistor 470-pF disc capacitor Hookup wire thanks to R. J. Sherwood, Ham Radio, Dec., 1977 0.0015-uF disc capacitor 4700-0hm resistor Cost 15,00, Add 5 tax in Texas 0.75. Shipping handling 0,60, Total Mail check or money order to Sartori...

Dx

OK3TAB D2A is in Angola and will be there for one year. He has a beam up and is a very good operator in handling the pileups. QSL 10 OK3ALE. The Northern California DX Foundation shipped a new linear amplifier to Easter island to help boost the signal of Father Dave CE0AE. You should be hearing the results by now. Beginning in July, ELstations in Liberia will be signing 5L lor the remainder of the year, KH3AA is a civilian on Johnston Island and is available for skeds. Write to John at Box 69,...

Heard On The Band

The Desecheo operation, KP4AM D. was a roaring success with overj2lt000 contacts made on all bands 2 through 160. The QSLs were expected to hit the mails in earty May, so you should have yours in hand by this time. Although the operation received financial support from the Northern California DX Foundation, it is slitl several thousand dollars in the red. Those wishing to help out can direct their mail to the DX Club of Puerto Rico, PO Box 50073, Levittown PR 00950, Those taking part in the...

Dsi Communications Series

INCLUDES BATTERY PACK AUTO ZERO BLANKING AUTO DECIMAL POINT 10MHz TIME BASE Accuracy . . . that's the operational key to this rugged advanced design Model CtOOO 1GHz frequency counter a significant achievement from DSI. That's because you get .1 PPM 0 to 40 C proportional oven time base Built in 25DB preamplifier with a 60DB adjustable attenuator . . x10 amp X100 audio scaler which yields .01 Hz resolution from 10Hz to 10KHz equivalent to 10 sec. amp 100 sec.Gate Time . Selectable 1 amp 1 sec....