This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and was found in an English publication. The sensor is semiconductor type.
This circuit is from an old American publication. It divides a 40 to 60 MHz TTL signal by integer...
This interesting benchtop circuit was found in the May 1977 issue of Radio Electronics magazine. The...
This few-watt amplifier was found in the August 1975 issue of Radio Electronics magazine. The...