This circuit is from a Radio Electronics magazine from August 1974. It used one of the first photomultiplier tubes that was to be powered by high voltage. The power came from the mains.
This game consists of a variation of the Nerve-Test with the difference that errors are indicated...
Found in a National Semiconductor manual from the 90's, this circuit uses components of the time,...
This bench power supply was found in Radio Electronics magazine from February 1962. The...