Found in American documentation, this circuit can make use of modern equivalent transistors. The circuit triggers with positive pulses.
The excitation of a loudspeaker with a tone of approximately 1 kHz, in an audible warning system, can...
Other operational amplifiers from the same family such as MC34002, MC35001, MC34004 and MC35004 can...
This source of some amps for voltages up to 40 V was found in an Italian magazine Elettronica...