Unijunction SCR Trigger (CB21469E)

This unusual unijunction transistor SCR firing circuit was found in a General Electric documentation from the 1960s.

Power grid neon flasher (CB12341E)
This circuit can be embedded in switches and sockets, thus facilitating its location in the dark....
Digitally Controlled Oscillator (CB18268E)
We can control the frequency of an oscillator from digital circuits or from the output of a...
Microammeter Amplifier (CB19584E)
This transistorized stage of an old documentation aims to increase the sensitivity of a...