Circuit Diagram
Audio Preamplifier

Now day's audio signal preamp is used in many electronic devices. There are many types of audio preamp circuits from simple to complicated big circuits. Here we are showing you a very good design of a small circuit of signal preamplifier.
This is a circuit of single transistor preamp the

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circuit is best for providing extra gain to weak audio signals. In this circuit the transistor used is a high gain transistor bc 184, resistor 1 provides the temperature stabilization due to negative feed back and improves frequency response. It also increases impedance to 48K ohms. Transistor Q1 draws 1 milliampere from 9 volt battery.
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