This transformerless circuit was obtained in a 1965 publication by Ferranti. The components are from that time, with emphasis on the type of engine used.
This converter was found in the June 1991 issue of Radio Electronics magazine. The circuit uses...
This simple field strength meter was found in a 1970 publication. The zero-adjustment...
Found in Philips' 1968 documentation, this circuit serves as a 6.3 V reference for high stability. |...