This circuit is from an article in Radio Electronics magazine from October 1958. The circuit is for testing electrolytics that operate at high voltages depending on the source.
We found this solid-state relay circuit that can function as a shield in a Radio Electronics...
We found this filter in a documentation for radio amateurs from 1974. The transistors could be the...
The power supply for this circuit, which we found in a publication from the 1980s, must be...