This power supply is based on the 723 integrated circuit, which is no longer very common today. The transistor must have a heatsink and the bridge can be formed by diodes 1N4002 or equivalent.
This ground-based circuit was found in 1990s American documentation. The transistor can be any...
We found this circuit in the Radio Electronics Handbook magazine special edition of 1992. The...
This circuit was found in a NASA documentation from the 1980s. The components used are of the time...