@▷ Low Impedance Microphone Amplifier circuit diagram | Diagram for Schematic

Low Impedance Microphone Amplifier circuit diagram

Low Impedance Microphone Amplifier circuit

This 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 mic-amp for higher impedance microphones. In this case, you should directly connect the signal to C7.

Component list:

R1=15kC1= 3k9U1= TL081
R2= 150kC2= 100uD1= 1N4148
R3= 2k2C3= 22uCN1= SIL6
R4= 820C4= 4u7
R6= 10kC5= 470u
R7= 10kC6= 10u
P1= 1MC7= 100n
C8= 47u UNIPOLAR

PCB layout (bottom):

Low Impedance Microphone Amplifier circuit

PCB layout (top-component placement):

Low Impedance Microphone Amplifier circuit

You can download the schematic, pcb layout and component list from here

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audio, Pre Amplifie
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