2n3904 Audio Amplifier Circuit Diagram. It is suitable to learn how the transistor works. A microphone preamplifier is an electronic circuit that serves the purpose of pre amplifying weak audio signals.

So here is a crystal radio circuit with preamplifier and amplifier stages to improve receiving sound. It s dynamic range may include a current handling capability of more than 100ma for switching applications and a 100mhz frequency handling capacity fits with amplification purposes. The transistor 2n3904 comes under the category of npn small signal low power general purpose transistor mainly applicable for switching and for signal amplification.

In circuit diagram or schematic which is set circuit in common emitter.

Basic transistors amplifier circuit using 2n3904. This is a simple audio pre amplifier circuit using single transistor 2n3904. This is a basic transistor amplifier circuit. A microphone preamplifier is an electronic circuit that serves the purpose of pre amplifying weak audio signals.