NOISE_CONTROL

Published:2009/7/2 4:21:00 Author:May | From:SeekIC

Circuit is plugged into headphone jack of amateur receiver. Four-position rotary switch selects desired combination of noise-limitingdiodes for handling progressively more severe noise pulses. Adjustable AF T-notch filter limits passband over sufficient range for both phone and CW. Inductor is common 88-mH toroid. Audio peaker circuit overcomes insertion losses of filters.-S. T. Rappold. Noise Rejector. 73 Magazine. Sept. 1977. p 116.



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