QEX

My demodulator did not work immediately because of a smali solder whisker. It was G3RUH's patience and advice that helped to correct the problem. The demodulator now works perfectly US builders might experience confusion about the type of demodulator output. G3RUH confirmed that the demodulator provides true RS-232-C or TTL output without additional modifications. If you need more information about the subject, drop me a note with an SASE, Finally, Jim has provided the necessary changes to the...

Info

You may have noticed QEX's new subtitle ARRL Experimenters' Exchange and AMSAT Satellite Journal. Actually, the possibility of this merger has been discussed on and off for several years. The problem was how to get technical material in the hands of satellite experimenters and operators. Both ARRL and AMSAT have a stake in the problem, which relates to how these two organizations serve the needs of their members. It has been apparent for some time that both organizations could improve the...

Nemal

12240 N.E. 14th AVENUE, NORTH MIAMI, FL 33161 TELEPHONE (305) 893-3924 TELEX 6975377 dealer pricing available on all items OEX (ISSN 0886-8093) is published monthly by the American Radio Relay League, Newington, CT USA. Maureen Thompson, KA1DYZ Assistant Editor Dr. Ron Long, W8GUS Associate Editor William Conwell, K2PO Geoffrey H Krauss, WA2GFP Bill Olson, W3HQT Contributing Editors Lisa Fuini OEX Circulation Michelle Chrisjohn, WB1ENT Production Supervisor Deborah Strzeszkowski Assistant...

Amateur Thermistor Power Meter

While the forward measurement might still be reasonably accurate, the reflected reading may be mostly forward power Still the venerable Bird 43 is an excellent value and often found at a reasonable price. For low-power and high-frequency measurements, the best bet is to obtain a low-power microwave power meter and some calibrated attenuators. These instruments use a sensitive thermistor or diode power sensor in conjunction with an accurate ac voltmeter in a bridge circuit. The most...

Scanners

The world's largest distributor of radio scanners, introduces new lower prices to celebrate our 15th anniversary. List price S899.95 CE price S399.95 SPECIAL 10-Bund, 20 Chmnmm e Crystalless AC DC Frequency range 25-550 MHz. continuous coverage and 800 MHz to 1.3 GHz. continuous coverage The Regency MX700Q scanner lets you monitor Military, Space Satellites, Government, Railroad, Justice Department, State Department, Fish amp Game, Immigration, Marine, Police and Fire Departments, Broadcast...