Found in a Philips publication from the 1970s, this circuit uses a DO040, which is difficult to obtain today. The circuit is powered by 12 V on pins indicated in the diagram.
This circuit supplies a voltage of 42 V, plus a symmetrical voltage of 12 V with 1 A. The voltage...
The operational ones used in this project are old types from National Semiconductor, since the...
This circuit is from a 1973 documentation, using germanium transistors common at the time. The...