AM-fidelity wireless microphone circuit

Posted on Mar 28, 2007

AM This circuit is tested and functionable. LM389 integrated circuit as the core element, the voice channel number acquired by the microphone MIC and converted into electrical

AM-fidelity wireless microphone circuit
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signals, amplified by the volume control potentiometer Rp2 and C5, a differential current source circuit coupled to the base VT3 pole. VT1, VT2 group together into a radio frequency oscillator, L, C6 is parallel high-frequency oscillation tuning circuit, C2 is anti-oscillation capacitor-fed.

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