This power supply was found in documentation from the 90s. Two power transistors are used to increase the current capacity. They must be equipped with a heat sink.
This power supply with several transistors can supply a current of several amps and a voltage of...
Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given...
We found this circuit in a 1974 technical documentation. The circuit can be made with BC549...