AUDIO_BOOST

Published:2009/7/16 6:29:00 Author:Jessie | From:SeekIC

LM380 power amplifier operating on 12 V is well suited for communication receiver having only limited audio gain. Circuit provides excellent headphone volume and enough loudspeaker output for small room. If signal at full secondary winding of product detector AF coupling transformer in receiver overloads U1, take signal from center tap of transformer winding that feeds volume control in amplifier.-H. L. Ley, Jr., More Audio for QST Course Receiver, QST, Oct. 1977, p 45.



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