低阻抗麦克风放大器电路(Lowimpedancemicrophoneamplifier)

低阻抗麦克风放大器电路 (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
  
   
  printed PCB
  
  Parts
  
  R1=k 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