We found this simple protection with zener diode in a 1967 Motorola documentation. The zener diode is 18 V, but the components can be changed for operation with other voltages.
This power control for powers up to about 10 W uses wire potentiometers in an arrangement that...
This simple transistor test circuit was found in Radio Elecronics magazine from October 1961. It...
Another triggered oscillator that we found in the November 1984 Radio Electronics magazine. The...