This timer with two unijunction transistors and one SCR was found in an American documentation from 1964. The unijunction transistors could be the 2N2646.
This interesting circuit for analog TV selects the first line of a frame. The circuit was found in a...
This circuit was found in a 1967 EEE. The components are from that time, but the circuit can be...
Found in a 1968 documentation, this circuit provides symmetrical voltages determined by component...