I finished up repairing the two Kenwood supplies from Al’s collection. These were both in a state of disassembly.

I had doubts if they were fixable (by me anyway). I had been thinking about them for sometime and thought it was

time for another look. I started with the what I thought was the better of the two, the PS-50. A zener and a transistor 

in the voltage regulation circuit was replaced along with a missing fuse fixed the problem. This is a heavy duty

supply rated at 20 amp one hour continuous. The second supply, PS-430, in a more disassembled state, missing heat

sink, upper half of the cabinet, fuse holders, and all fasteners. Fortunately I found the cabinet, heat sink with pass

transistors in another box of stuff. This supply had a shorted pass transistor so I replaced both pass transistors with original PNs

and fuse holders. The supply works as it should. The front panel had 3 of the four mounting points broken 

and some JB Weld and copper strap fixed it. I was able to scrounge metric and sheet metal screws necessary