VISUAL_MODULATION_INDICATOR

Published:2009/6/25 21:45:00 Author:May | From:SeekIC

Indicator lamp brightness varies in step with modulated RF signal. Adjust R2 with transmitter on (modulated) until the lamp flashes in step with modulation. C1 = 5 pf, C2 = 100 pF, D1 = 1N60 or 1N34 (Germanium), R3 = 10 K pot, I1 = 6-8 V, 30-60 mA incandes-cent bulb, Q1 = 2N3393 (for increased sensitivity use 2N3392 or other high-gain transistor).



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