Microphone Amplifier based K548UN1

Microphone Amplifier based K548UN1
The operating principle is as follows: Resistors R1, R3 is used to adjust the gain, which equals 25. To increase the gain by 75 to build a resistance of 68 ohms. It is not recommended to install too high gain, because it may affect the sound quality, although this depends on the microphone. Capacitors C5 and C6 are used for suppression of feeding. (more…)