This 1965 General Electric circuit uses a "Thyrector" that is a suppressor of the time. The setting shows your use of the trigger line.
This circuit was found in an 80's Electronic Engineering. The circuit uses operatives of the time...
This circuit was obtained in a 90’s American documentation. The FET can be replaced by a modern...
This unregulated low voltage source was found in the July 1962 Radio Electronics magazine....