H7140 PDP11 PSU

Unfortuanely SMPSUs are not easy to understand, and there are few really good books on them. And they are not covered in most electronics courses, which is a pity. Yes, I know letting people loose with rectified mains is a recipe for deaths and lawsuits, but you cna make SMPSUs that take any voltage in, so you could learn alot from making one that runs off a bench power uspply (say 12V input). But it's rarely taught... You are, alas, right, about experience. The first thing you discover when you start seriosuly working on classic computers is that you are never going to stop learning new stuff. Good! If I were teaching a course of classic computer repair, I would not start the PSU seciton with the H7140. Mind you, I'd not start the CPU operation section with the PDP11/45 (for much the same reasons, its a complicated design with all sorts of interesting features). But that was the machine I taught myself how to repari from the gorudn up. I started with something complicatedm and so have you... Well, I have both, and I refer to them... More seriously the first edition is more contemporary with classic computers, but the second edition has a seciton on SMPSUs (which are not covered at all in the first edition). Said section even includes a schematic of the Tandy 2000 PSU (IIRC). -tony