I have an old Archer Dual Variable Power Supply from Radio Shack that I built from a kit when I was a teenager. I'd like to get it working again. I think it would be a simple matter if I had the schematic. It uses a 741 and 1458 op-amp. On one side, the power transistor and two smaller transistors were removed years ago. I seem to remember burning them up and removing them, but didn't write down what kind they were. The other side has a power transistor marked "2020", and two smaller 2N2222 transistors. I'd like to know where I could find the schematic for this power supply, or failing that, get some help deducing what transistors I need to replace the missing ones. Would they be the same as the other side of the power supply, or complementary?