A quick repair job – an old but trustworthy Harrison (HP) 6202B powder supply. 0-40 Volts, 0-0.75 A.
This is quite a useful range, has overrange to about 45 V, and a good compagnion for a 6200B supply that I have been owning for a long time.
After a few hours of test run, under about 50% load, a quick check – at various loads, with and with out current limitation. That’s the kind of noise I’m getting. It is mainly 60 Hz ripple, about 2-2.5 mV p-p; maybe 1 mVrms – a bit more than the 0.2 mVrms specified by Harrison – but still in the same range as the Vrms noise of modern power supplies.