This simple 15 V power supply was found in an article describing an assembly in the January 1987 Radio Electronics magazine. The power supply is used to power the circuit described.
Quadrature Generator for Transistor and SCR Testing This circuit was found in US 1980s...
This circuit, with output currents up to 500 mA, can stabilize or regulate the output voltage of a...
This circuit that uses only transistors that are still common was found in a 1995 documentation. The TIP41...