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I've been happy with my $25 B&K 466 for the ~11 years I've owned it. It's perfectly good as a tester (most CRTs I don't even need to look up settings or reference the test proceedure it's that intuitive) and mediocre as a rejuvenation rig...If you want to wake up a CRT that's been dormant years in the most gentle manner by setting heater voltage to %140 and waiting several minutes it will do fine, but if you have a CRT that needs a zap from the rejuvenate button that is sort of a kill or cure... I've had some luck with it, but I've killed color CRTs trying to Ballance gun emission to achieve color tracking.
I have seen the CR70 work miracles rejuvenating dead monochrome CRTs and have been keeping an eye out for a cheap one. The CR70 has an original video tape about it from sencore uploaded to youtube and they claim the old CR31 used the same rejuvenation system...so perhaps the CR31 would be a good budget rejuvenation rig.
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