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 oscillator for the fifth overtone of a crystal was found in a Radio Electronics magazine from...
Nixie-type displays are no longer used except for assemblies of people who like old technology. The...
This simple low current circuit was found in a Radio Electronics magazine from August 1960. The...