CQ_ON_TAPE

Published:2009/7/11 2:12:00 Author:May | From:SeekIC

Frequently used code message such as amateur radio CQ call is recorded by keying audio oscillator with desired message and picking up oscillator output with microphone of endless-loop cassette or other tape recorder. Rewound recording is played back through single-transistor stage connected as shown for driving keying relay of transmitter.Circuit requires shielding.-Circuits, 73 Magazine, July 1977, p 34.



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