Using a component of the era, this 1968 Mallory circuit uses an output transformer whose characteristics were not provided in the original documentation.
We find this circuit in a radio amateur publication of 1977. Its purpose is to measure the...
For bench use, this circuit functions as a bistable safety switch. The circuit is from a Radio...
The presented circuit can be implemented with a BC548 and for larger currents a BD135 can be used....