This power source for Gas Laser was obtained in a 90’s Electronic Design. The circuit uses a switched regulator from the time. Equivalents can be used.
This circuit with transistors was found in an old Japanese publication, translation of an American...
This 8 W amplifier with germanium transistors was found in a Japanese documentation from 1967. The...
This circuit of the 80's makes use of components of the time. The circuit is from an American...