This frequency triple oscillator circuit was found in an American publication in 1967. The FET is current and more detailed information about the coils is not given.
The energy that powers this radio's amplifier circuit is obtained from the signal itself. The coil...
Based on the BA1404 integrated circuit, this circuit was found in the July 1992 issue of Radio...
This circuit can linearly control the temperature of showers, taps or heaters up to 2 500 W. The...