5_mA_S_METER

Published:2009/6/30 21:31:00 Author:May | From:SeekIC

Circuit designed for 5-mA meter movement uses two-stage voltage ampilfer Q1-Q2 with emitter-follower output Q3 serving as impedance-matching stage AF input for S-9 reading is 25-30mV P-P and forfull scale is 50-60mV P-P Frequency response is 500 Hz to 10 kHz-M，A，Chapma,Solid-State S-Me-ters,Ham Radio，March 1975 p 20-23



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