Suggested by General Electric in 1965 documentation, this circuit controls the current at a load from half to maximum power. The circuit is for loads up to 900 W with the indicated components.
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...
We found this circuit in a Radio Electronics from January 1967. The SCR is already the C106, which...
This power source with silicon diodes at a time when valves were still used was found in Radio...