With this passive circuit it is possible to modulated in amplitude a low intensity RF signal. The circuit is from old American documentation and uses a germanium diode as its main component.
This configuration appears elsewhere on this site. We obtained it from a 90s Radio Electronics, based...
This circuit is from a Fairchild digital clock module shown in the March 1977 issue of Radio...
This good power amplifier, a few tens of watts, is part of an article in the December 1972 Radio...