DIY miniature antenna booster

When using a good antenna amplifier for the UHF range, programs can be received from television stations which, without a preamplifier, only deliver a very noisy "snow field". The antenna amplifier described here is very simple. It can because of its small dimensions directly in the junction box of Antenna to be accommodated. The small coupling capacitance in the input protects the transistor from overvoltages that may occur during a thunderstorm. The built-in resonant circuit in the collector branch can be tuned to any frequency between 470 and 790 MHz.

Because of the extremely low retroactive effect  of this transistor is the amplifier stronger very stable, even with poor matching of the input and output. The bandwidth of the circuit is about 15 to 40 MHz.

reference : Elektor Electronics