低阻抗麥克風(fēng)放大器電路 (Low impedance microphone amplifier)

The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 6-30VDC. If you don't build the impedance adapter part with T1, you get a micamp for higher impedance microphones. In this case, you should directly connect the signal to C7.

Layout of board

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printed PCB

Parts
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R1=15k?? C1= 3k9?? U1= TL081
R2= 150k?? C2= 100u?? D1= 1N4148
R3= 2k2?? C3= 22u?? CN1= SIL6
R4= 820?? C4= 4u7????
R6= 10k?? C5= 470u????
R7= 10k?? C6= 10u????
P1= 1M?? C7= 100n????
??? C8= 47u UNIPOLAR????