This circuit of a few watts of power shows a typical configuration from the 70s using driver and output transformers. Output transistors must use a heatsink.
This is the basic configuration of many LM339 manuals, as a comparator with hysteresis. The font...
We found this circuit in a Popular Electronics of the 80's. The circuit can be used to drive...
This simple power supply for transistors was found in documentation from the 1940s. The...