We found this circuit with transistors in a Philips documentation from 1968. The double transistor can be replaced by discrete married types. The power supply is symmetrical.
This circuit was obtained from an English magazine from 1976. The transformer has a current of 1.5...
We found this circuit in a 1974 documentation. The NPN transistor can be the BD135 and the PNP the...
In this 1964 Electronic Design circuit, the frequency division of the signal is done according to the...