PREAMP_IN_MIKE

Published:2009/6/29 22:10:00 Author:May | From:SeekIC

Common-source FET preamp and 15-V battery fit into Turner 3500 hand mike for boosting output of ceramic element 20 dB. Frequency response of preamp is flatfrom 200 Hz to over 100 kHz，Drain is 200 μA only when push-to-talk is pressed、giving long battery life．-G. Hinkle、 Self-Powered Mike Preamp,73 Magazine， Nov.1976,p 65



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