Binary Counter using lamps (CB6606E)

This is a transistor flip-flop suggested by General Electric in a 1966 paper. The transistors are of the time and can be used equivalents.

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Crystal divider by 10 (CB6831E)
Suggested by American documentation from 1968, this circuit divides the frequency of synchronized...
Very Low Frequency Generator (CB4925E)
By the components used this circuit of old English documentation can still be easily assembled. The...
IF Amplifier with Tunnel Diode (CB23849E)
Radio Electronics magazine in November 1962 published in an article several circuits with tunnel...