"Bob Engelhardt" wrote in message
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On 1/5/2017 2:39 PM, Benderthe.evilrobot wrote:
TBH: I'd strip out the original current limiter circuit and rebuild with
one from a more modern linear PSU. ...

Too much. I could even live without the limiter, but for a couple of
cheap parts, I'll fix it. But not anything more.

I've knocked a complete current limiter together in an evening - basically
just a scrap of sheet aluminium and a few components that were laying
around.

You could use a Si transistor and fit the matching Si diode, but you'll
probably have to recalculate all the sense resistors - which is most of the
work.