Re: HV regulation.
To wrap this up after building various circuits and mucking about I found the best solution was an CLC filter, EG 100u after the diodes, L then 820u = ripple of less than 1mV P-P. No idea what that would mean in terms of PSU Z.
Out of the various circuits I tried the cap multiplier was disappointing and produced some odd results especially the mosfet version which produced massive ripple with 2nd H.
So though not regulated I think it's the best fit for the job in hand, space etc. Still, it's been an interesting exercise.
Thanks to Molly foor typing this out, Andy.
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