This circuit with transistors of the time was found in the November 1972 Radio Electronics magazine. The circuit also generates a sawtooth signal for use on an oscilloscope.
This is one of the first circuits published on this component. We found it in the September 1950...
We found this circuit in the November 1974 Radio Electronics magazine. The frequency depends on C1...
We found this amplifier for hearing aids or hearing aid using only transistors in a documentation from the...