I found myself some PSU’s at a flee market a few weeks back and decided to pull out the matching pair of 75V PSU’s for some inspection. Much to my delight, they both appear to work fine.

The only issues with them is the neon power indicators are not working (or barely working), and the voltage/current multiply switches for the analogue movements are crusty. And not to mention a non-standard power connector on the rear. These will all be replaced and updated in future videos.

I have decided to replace the analogue meters with LED modules (just waiting for them to be shipped from China on the slow boat) then I will hook them into to sense the output terminals and find a way to recess it in places of the old meters.

For the power indicator, I will find a voltage rail inside the PSU (most likely an opamp rail) and fit an LED in place of the neon lamp.

Please keep tuned for more!

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