Re: HV PSU Question
It seems the only worry that you have is the hum. Judging whether the hum is a sign of a fault or not depends on us knowing in some absolute sense how loud it is. Is it as loud as a fridge when that's running ? Or as loud as a microwave oven ? Or as loud as a washing machine on full spin ? Or as loud as an electric drill ?
Can you measure the current flowing in the primary circuit ? If not then what's the lowest value fuse that survives in that circuit - you could at least try a 3A one in the mains plug, although that might well survive quite a serious fault in the transformer ?
Cheers,
GJ
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