Published:2009/7/6 1:30:00 Author:May | From:SeekIC
Single active filter provides two widely differing turnover frequencies, as required in audio amplifier used with phonograph. For values shown, insertion loss of filter is -6 dB at 37 Hz and at 23 kHz. Components may be switched to provide different turnover frequencies, but complete removal of filter requires considerably more complicated switching.-P. I. Day, Combined Rumble and Scratch Filter, Wireless World, Dec. 1973, p 606.
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