TV antenna booster

Description.

The circuit shown here is of a TV antenna booster based on the transistor BF180. The circuit operates in the UHF band and has a gain of 15dB. Capacitors C2,C3 C4 ,C5 and inductors L3, L4 forms a UHF band pass filter. The input signal is fed to the emitter of Q1 through this filter. Resistor R2 and R3 biases the transistor Q1 which is wired in the common base configuration.

Circuit diagram.

Notes.

  • Assemble the circuit on a good quality PCB.
  • For better performance, enclose the circuit in a metal box.
  • The circuit can be powered from 12V DC.
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