Additional Pull Pull (CB6119E)

This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.

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Flip Flop with SCR (CB4612E)
This circuit has two stable states such that at each instant only one SCR leads. The state change is...
Intermittent buzzer (CB20494E)
This two-tone buzzer can be powered by a solar panel. The circuit is from a 1991 documentation. The...
Code Practice Oscillator (CB1429E )
Found in a 1975 radio amateur publication, this simple oscillator is for code practice. The PNP...