This amplifier stage without an output transformer was found in Radio Electronics magazine from October 1963. The supply is 12 V, and the output is 8 or 16 ohms.
The high sensitivity of this type of SCR recommended in our assemblies allows it to be triggered by low...
Found in a 90s documentation, this circuit triggers the SCR when there is an overvoltage in order...
This circuit was found in a 1989 documentation and was intended to be part of a presence...