This circuit may be of interest to restorers of old video equipment. We found it in the Radio Electronics magazine of December 1989.
This circuit is from a 1969 Electronics World. The transistors may be modern general-purpose...
We found this circuit in an American 1980s documentation. Other comparators can be used and the...
In fact, the maximum output current of this source depends on the transformer which can be 6, 7.5, 9...