This circuit was found in a 1967 General Electric manual. It is intended for the control of high voltage Nixie pipes used at the time. SCRs may be equivalent.
This oscillator, which can be used as a signal injector, was found in a Popular Electronics from the 90s....
This circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit is based...
This project was published in the April 1989 issue of Radio Electronics magazine. It drives LEDs...