Found in American documentation this circuit uses transistors of the time. The circuit can be made with current components. It works as a trigger working with 600 ohm signals.
Waking up to a loud and clear sound from an audio oscillator, after up to 5 hours of sleep, or...
Short duration pulses or "clicks" can be generated with the circuit seen in the figure. The...
This circuit is from a 1992 Electronics Handbook. The circuit generates a special tone effect for...