Circuits similar to this can be found in this section. This is from 1967 General Electric documentation. The main SCR must be fitted with a heat sink.
This circuit was found in a 1986 documentation and it may be difficult to obtain some of its...
This switching boost regulator, which provides a 24 V output from a 12 V input, was found in the...
This circuit for the 11-meter band, operating at 29.255 MHz was found in a Radio Electronics dated...