smithy666

Elektor published a dissipation limited back in 1991 - similar principle to the SCR circuit. I had built the Elektor Lab Power supply from 1990 (dual 0-40V, 0-5A) which employed a pre-regulator circuit on the primary side to reduce dissipation. I got the supply to work fine, but the transformers make a hell of a noise when a load is applied. I'm looking to replace the pre-reg circuit with a dissipation limiter on the secondary side. I've posted the schematic - the links are so it can be changed between +ve & -ve versions (with transistor changes)