A friend gave me a power supply he made in high school in the 70's. It hadn't been powered on for decades.
I opened it and checked for any obvious short, checked the capacitance of the two electrolytics (don't have an ESR-meter yet), checked the forward voltage of the rectifying diodes, removed the oxydation from the fuse and plugged it in.
It didn't blow up
The voltage selection does work and it's reasonnably well calibrated.
But as soon as I put a load accros the terminals, I get a pretty high voltage drop:The AC is properly transformed and rectified (there is no ripple accros the 1000 µF cap that smoothes the DC after the bridge rectifier, it shows a stable 30+ volts).
After that, I don't know what happens
Do these symptoms shout out any obvious fault or should I keep investigating?