This circuit was originally intended to operate with a solar source for experiments. Transistors are general purpose, and the output current is relatively low.
This circuit was found in an American 1980s documentation. The transistors admit equivalents and the...
We find this circuit in a 1980s documentation. The circuit can be applied to modern operators with...
This circuit is from Mullard documentation from 1969. Transistors support current equivalents. Output...