100_200_MHz_DIODE_RECEIVER

Published:2009/7/16 0:04:00 Author:Jessie | From:SeekIC

Hybrid tuned-diode version of basic crystal detector uses line cavity cut from sheet copper and soldered into box to give high Q up to 200 MHz. Useful for checking local oscillators around 135 MHz and transmitters around 147 MHz, along with 2-meter transmitters and transceivers. L2 is 4 turns air-wound 1/2 inch diameter and 1/2 inch long, with L1 as 1 turn adjustable around it. C2 is 1 x 2 inch brass plate with 0.005-inch teflon sheet with nylon bolts.-B. Hoisington, Tuned Diode VHF Receivers, 73 Magazine, Dec. 1974, p 81-84.



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