1800_Hz_COMMAND_OSCILLATOR

Published:2009/7/20 4:53:00 Author:Jessie | From:SeekIC

Connects across microphone leads of FM transceiver, to produce control (command) tone for entry to repeater or for other purposes. Switch may be placed in supply lead if desired. Q1 can be 2N404 or one of transistors in 2N1303, 2N2904, 2N3638, 2N6516, or 2N6533 series. Q2 can be 2N1308, 2N2712, 2N3565, 2N3569, 2N6513, or equivalent. CTRIM is 0.0062 μF.-Circuits, 73 Magazine, April1973, p 132.



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