This circuit is from a 1967 RCA publication. The components are of the time, admitting equivalents, including the SCR that determines the maximum power of the load.
For readers who need high continuous voltages, a low current power supply can be built with few...
This circuit was found in a 1977 documentation. It limits the voltage from a source using zener...
This conventional double time constant circuit was found in an American documentation from the...