My tube is running between 650 and 700v with the listed 3.5v into that CCFL, yes.
700v seems a hard limit -- as you say.
I didn't see a cheap usable circuit that works posted, so I show one.
Doesn't do me any good to spec settings on some piece of surplus gear I don't have and can't find working.
Since we only use 3He as a detector, should not this entire thread be in detectors?
IEEE Spectrum item: "Physics Projects Deflate for Lack of Helium-3"
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Doug Coulter
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Re: IEEE Spectrum item: "Physics Projects Deflate for Lack of Helium-3"
Why guess when you can know? Measure!