This radio for the AM band has the traditional superheterodyne configuration with several transistors and integrated audio amplifier circuit. The circuit is from the 70s.
This small transmitter has an RF amplifier stage with coupling made from the central socket of the...
This audio detector circuit can be used for cable identification. We found it in a Popular...
This oscillator generates a 100 kHz signal given by the crystal. This signal can be a reference for...