Found in a 73 magazine for radio amateurs of the 1980s, this circuit uses a dual-gate MOSFET. This component is not currently common.
Unlike the previous one, this circuit is intended for the reception of frequency modulated signals...
Found in Electronics now from the 90s, this circuit uses a sensor from the time, which is...
We obtained this oscillator in a publication for radio amateurs in 1978. The circuit operates on...