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.
This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms...
This circuit shuts off and locks the power to a load in the event of a failure. The circuit is from...
This circuit is from 1995 documentation, but can be easily assembled today, as the components used are...