This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz. FET is old, but modern equivalents can be used.
I found this simple circuit from an English magazine from 1984. The circuit can be easily...
Information about the high voltage transformer and the detecting circuits was not given in this...
The purpose of this circuit is to supply a direct reference voltage from the power grid. The...