richard.cs: I have a small 1 uF 50V electrolytic on the output side. As per a spec sheet I was working off. Should I go bigger?
Great info, you have all been very helpful and patient! Next I need 12.6V at at least 7 Amps, the amp guru who specilises in this Russian beast uses Chinese switch mode supplies for this. As richard.cs mentions, I am in the realm where a switcher should be the way to go there.
I am also playing with a 50 volt SS linear, and have bought an HP rack server 50 volts at 50 or 60 amp switch mode supply off Ebay, dirt cheap. Beautifully made, they probably cost a lot of dosh new! There's a small preset pot inside to trim the voltage. I have found someone who has added some RF caps to stop RF getting in, and changed the preset to give a bit more voltage adjustment range. I am wondering if the big 1300 Watt rack server 12 volt power supplies can similarly be trimmed. There can't be a cheaper way of getting a genuine 100 Amp 12 volt supply! Anyone been inside one? I assume they all must have some sort of regulator device, which can be trimmed with either a preset or a resistor change to a preset? When I look at my Farnell 60 volt, 50 Amp supply, that I can only JUST lift, but not get on the bench on my own, and the HP one that's very compact and light, I can see switch mode is the way to go. The 50 volt HP one I have emits no detectable RF noise, either, certainly on the HF bands.