I know this is a very old thread, but it just so happens that I have this very power supply, and I'd also like to refurbish it. I built it from a kit I bought from Radio Shack around 1980. I do have one problem that I hope the original poster can help with. Years ago, something happened that burned out the three transistors on the right side of the board. At the time, teenage me removed the transistors and didn't write down the numbers of the components, and I can't find the original circuit diagram. But if you still have that supply, I'd be very grateful if you could tell me the numbers of those transistors. I don't know whether they are identical to the working left side, or complementary.