MICROPHONE CONDENSER PRE AMPLIFIER CIRCUIT SCHEMATIC DIAGRAM
The circuit requires a 6-9 volt supply. Output of the microphone amplifier can be made variable by connecting a 10kO potentiometer . Circuit’s gain can be increased by men perbesar the value of 47K, depending on the input sensitivity of the main amplifier system. The microphone should be housed in a small round enclosure.
List componet of condenser pre-amp mic circuit
Q1,Q2 : LM1458 Op-Amp
R1,R2,R3 : 4.7k ohm resistor
R4, R5 : 10k ohm resistor
R6,R7 : 47k ohm resistor
C1, : 0.22uF ceramic capacitor
C2 : 1uF ceramic capacitor
