We found this circuit in a 1971 documentation. The circuit can be assembled with more modern transistors such as BC548 for Q1, BC558 for Q2 and BD135 for Q3.
This circuit is from an old documentation of Radio Shack from the 70s. The transistor should...
This 1980s circuit was found in Motorola documentation. The circuit uses period components that admit of...
The power supply shown in the figure provides output voltages in the range of 1.2 to 25 V with...