In the figure we have an IF amplifier step using a MOSFET. The circuit was found in a 1980s documentation, intended for FM receivers of the time.
This simple radio with 1 germanium transistor was found in a Japanese documentation from 1967. The coil...
This circuit uses a parallel resonant crystal to control the frequency. The circuit is from Radio...
This circuit from a 90s Popular Electronics, decodes the old analog TV signal. It works with a...