This circuit with germanium transistors is from 1960 and was found in Mullard's transistor application manual from 1960. The circuit can be adapted to use more modern transistors.
This interesting circuit, found in an old American publication, measures alternating signals in a...
This sophisticated audio generator with digital display was found in the March 1984 issue of Radio...
This power supply is from a 1977 documentation. The transformers have 11 V secondary with 10...