Found in a 1947 publication, this circuit uses 4 parallel/push-pull tuber in the output stage. The circuit employs dual power supply with two rectifier tubes.
In this circuit, the output voltage is Vxx plus the zener voltage. The circuit is from the SGS...
This circuit is from a 1967 General Electric SCR manual. The capacitors are polyester and the...
We found this circuit in an English publication from 1969. The circuit uses transistors from the...