BEAT_FREQUENCY_OSCILLATOR_FOR_AM／SW_RADIOS

Published:2009/6/23 2:14:00 Author:May | From:SeekIC

This BFO can be added to inexpensive AM/SW receivers to enable reception of CW signals. Output couples to base of last IF stage. T1 is any 455-kHz IF transformer. The BFO switch should be a DPDT type (as needed), and the radio AGC circuit will probably have to be disabled for CW reception.



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