WIRELESS MICROPHONE


Posted on Feb 5, 2014

An op-amp IC (741) amplifies the audio signal from MIC1, and R12 controls its gain. Audio is fed to the oscillator circuit Q1 and related components. D2 is a varactor diode. Audio fed to D2 causes FM of the oscillator signal. L1 is 1/2 turns of #18 wire on a He` diameter form. The antenna is a 12` whip.


WIRELESS MICROPHONE
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