Multi-pulse trigger (CB21477E)

This circuit was found in a 1967 EEE. The transistors are from the time and can be tested equivalent.

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Differential relay (CB8839E)
Found in a 1969’s Electronic Design, this circuit operates in a narrow range of voltages....
Power stage (CB23766E)
This power stage with two counterphase transistors and coupling transformers was shown in Radio...
300 Hz Flasher (CB6800E)
Found in old documentation, this circuit uses special discharge lamps (neon) of the time. The...