This converter converts a signal in the 200 kHz to 3.8 MHz band into frequency signals that can be tuned on a 3.5 MHz receiver. Coil data not provided.
Found in the 1989 Radio Electronics Experimenter magazine, this circuit uses several transistors, one of...
This circuit was obtained from an English magazine from 1977. It is a toy musical instrument that...
This is the circuit for the HM-10ª, an instrument sold by Heathkit. The circuit is from a Radio...