This QST circuit generates 4 frequency signals according to the crystals used. Transistors admit equivalents although the indicated types can still be found with some ease.
This circuit was found in Radio Electronics magazine from October 1966. It consists of a rhythmic...
This circuit is from a Popular Electronics from the 90's. The circuit provides an output for a...
The transformer of this unit found in an old Japanese documentation can have 22 to 25 V of...