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 is a typical common collector amplifier step configuration. The transistor can be used...
This simple intercom for home use was found in a 1979 publication. It can be easily mounted with...
This is the configuration of a conventional bandpass or bandpass filter with an operational...