This amplifier for signals in the 2 m range that corresponds to 150 MHz was found in an American documentation from the 1980s. The FET can be a BF245.
In the figure we have the way to implement a voltage doubler in a simple source. The component values...
This circuit, which has a power of a few tens of microwatts, is suggested by Maxim. The circuit has a...
With the name of detectaphone, we find this circuit in a documentation from 1966. It will be...