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.
Found in a 1968 Motorola manual, this DC circuit uses components from the era. The circuit fires in...
Mouser Electronics has in stock Amphenol FCI Booltrack ™ connectors for robust connectivity...
This version of triac control is from a 1968 documentation. The circuit uses components from the...