Schematic & Wiring Diagram

This is cable TV amplifier using 2 transistors. This amplifier circuit is for cable TV systems using Ohm coaxial cables and works fine up to 150MHz. Transistor T1 performs of amplification. Up to 20dB gain expected from the circuit.T2 is wired as an emitter follower current gain.

assembled on a Vero board

Use 12V DC for powering the circuit.

Type no of the transistors are not very critical.

Any medium power NPN RF transistors can be used in place of T1 and T2.

This is just an elementary circuit. Do not compare it with high quality Cable TV amplifiers available in the market.