This is a schematic of a cable TV signal booster amplifier circuit which can be used to amplify or boost the signal of cable TV system. Use 75 Ohm coaxial cables at the input and output of the circuit and fit the circuit in a metal case. The bandwidth of the circuit is up to 150MHz. Transistor Q1 is used to
amplify the signal and Q2 is working as an emitter follower. The circuit will provide gain of 20dB or more. The current consumption of the circuit is only 20mA.