Pre Amp Schematic Audio Stereo Line Driver

Pre Amp Schematic Audio Stereo Line Driver


This schematic shows a Pre amplifier for audio stereo line driver which has a low output impedance, and is designed to drive long cables, allowing you to listen to a remote music source without having to buy expensive screened cables. 

Pre Amplifier for Electret Condenser Microphone

Pre Amplifier for Electret Condenser Microphone

Pre Amplifier for Electret Condenser Microphone


This schematic shows a pre amplifier to be used with Electret Condenser Microphone.

Class AB Audio Power Amplifier 2 Watt


Class AB Audio Power Amplifier 2 Watt

This simple circuit shows Class AB Audio Power Amplifier which powered at 2 watt.

The single 470R preset resistor, PR1 controls the quiescent current flowing through the BD139/140 complimentary output transistors. 

TV amplifier with transistors


This schematics shows an actual simple cable TV amplifier with two transistors. Transistor T1 performs the job of amplification. Up to 20dB accretion can be accepted from the circuit.T2 is active as an emitter addict to access accepted gain. This amplifier is aacceptable for cable TV systems application 75 Ohm coaxial cables and works accomplished up to 150MHz.