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WIRELESS_CAMCORDER_MICROPHONE

2016-11-01 13:49  
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WIRELESS_CAMCORDER_MICROPHONE
A 741 op amp acts as an audio amplifier and frequency-modulates VHF oscillator Q1 via varactor D2. L1 is 2.5 turns of #18 wire on a 5/16,-inch-diameter form. The turn spacing can be varied to adjust the transmitter frequency. '