This two-transistor circuit was found in American documentation from the 1990s. The circuit can use modern general-purpose transistors.
The circuit is from an 80's publication, but the components are current, only special type diodes...
The maximum current of this power supply is 2 A and the output voltage can be set between 6 and 24 V. The...
This is a circuit of the 80's ON Semiconductor thyristor manual. Of course, the configuration can be...