REGENERATED_CW

Published:2009/7/11 2:41:00 Author:May | From:SeekIC

Audio oscillator whose frequency can be varied is keyed in accordance with incoming CW signal, to give clean locally generated audio signal without background noise and interference. NE567 phase-locked loop serves as tunable audio filter and LED switch driver for activating NE555 variable-frequency tone oscillator. LED serves as visual tuning aid to indicato that PLL is looked on to incoming signal.－Regenerated CW.73 Magazine, Dec. 1977,p152-153.



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