AJP's Circuits

HF to VHF 18dB Pre-amplifier.

This Pre-amplifier looks simple but has served me for many years with different radios. The gain is almost linear throughout the HF and VHF spectrum. It starts to tail off around 180Mhz but still has a gain of 8dB at 280MHz. It is ideal for wide band radios. For dedicated frequencies it is ideal to insert a tuned LC circuit in the input and output connections.





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This page was updated on 21st March 2001.