This circuit was found in a 1980s documentation for amateur radio. The circuit makes use of components of the era, but modern equivalents can be used.
This circuit was suggested by Philips in an old publication. The coils, made with wire 14 to 16...
This circuit responds to frequencies from 100 Hz to 3 MHz. We find it in a 90s Radio Electronics....
This configuration is from a 1966 publication. However, with small changes in component values it can...