This circuit was obtained from a Philips documentation from 1968. The transistors can be replaced with equivalents, only with care so that the doubles are exchanged for matched pairs.
This power control was found in a 1968 power circuit manual. The SCRs are according to the power of...
This current sensing circuit for applications up to 10 A has been found in a Linear Technology...
This 200-mW amplifier uses one of the first commercial power transistors. The circuit is from a...