This is the typical circuit of a local oscillator for a superheterodyne FM receiver. The circuit was found in a 1980s documentation and is typical of early and early receivers.
This 1995 circuit uses an audio amplifier that is no longer common today. However, other...
The L coil of this receiver determines the received waveband. The circuit is from a 1963...
This circuit, from a 1988 documentation, makes successive actuation of the shower to control the...