This is a good pre-amplifier for microphones that can be. Used in, for example, mixing consoles The circuit operates with a dual op-amp type NE 5532. The amplifier must be adjusted. Simply plug the power and control over P1 such that half the supply voltage (6 V) on pin 3 of IC1 state. P2 is then adjusted to the desired volume.
- R1 = 8,2 kW
- R2, R4, R5, R6 = 10 kW
- R3 = 1 k
- P1 = 4.7 K?
- P2 = 100 k
- C1, C2, C4, C6 = 10 uF
- C3 = 470 nF
- C5 = 100 nF
- IC1 NE = 5532
