Pre Amplifier - microphone preamp

This circuit be Audio Mixer Circuit by FET 2N3819 numbers, build easy and the a little equipment. By this circuit lets to use the microphone since two go up or use other tool all right wasp suit amplifier same microphone. The R1 and R5 [...]

This kit was developed as a pre-module for a number of audio applications where there is insufficient input signal. Ideal for use as a microphone pre-amplifier or for level correction. The mian part is IC OP-AMP LM741 or UA741. Output level is adjustable with up to 40 dB of gain. Requires power supply of 10-30 [...]

I decided to make this circuit so that I could listen to faint noises. It is a simple two-stage transistor amplifier design. The circuit was designed to use the input from a dynamic microphone but I am sure that with some modifications it would be possible to use an electret microphone. The 2N3053 transistors used [...]