Transient Suppression on SCRs (CB6571E)

This 1965 General Electric circuit uses a "Thyrector" that is a suppressor of the time. The setting shows your use of the trigger line.

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Shutdown After 60 Seconds using an UJT (CB12335E)
In this circuit of a 1968 publication the unijunction may be 2N2646 and the transistor BC548. The...
Zener triggering (CB21472E)
The purpose of this circuit is to improve a trigger circuit using a zener diode. The circuit was...
Crystal Radio with filter against Jamming Station (CB934E)
This interesting circuit of the American publication Electronics Handbook Volume XIII 1993 shows a...