This 1967 Electronics World circuit is suitable for frequencies up to 1 MHz. The setting applies to virtually any junction FET.
We found this voltage multiplier circuit in a Radio Electronics magazine from December 1991. The...
This circuit is from a 1967 documentation. It consists of a sensor for memories used at the time....
Found in an American leaflet from the 90s, this circuit uses an AM radio out of station to monitor...