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.
This circuit was found in a 90s Radio Electronics. The FM encoder or multiplexer is an uncommon...
This touch-controlled circuit was found in English documentation from the 1970s. The components...
Found in a book on transistors from 1954, this circuit can modernly be used as a relay shield. A 1k...