Common emitter output trigger (CB8923E)

This circuit was found in a 1968s American. Transistors are of general purpose and the input is a rectangular signal of appropriate amplitude.

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Audio oscillator (CB9043E)
Several configurations equivalent to this can be found in this section. This was found in a 1970s...
Insect Repellent (CB11831E)
This circuit is the traditional 555 oscillator that produces a hum in the piezoelectric...
NE602 Converter (CB25304E)
This circuit converts signals from the longwave band of 350 kHz to 500 kHz to 4.35 to 5MHz. The...