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I'm the one that bought the 12KP4 and it arrived yesterday.
I have an increased hatred of foam peanuts. I looked like the Stay Puft marshmallow man in Ghostbusters after unpacking it. Even though we had 100% humidity they were flying to me and sticking.
The emission tests good and there are no shorts. However, the G1 cutoff is low. I have four different CRT testers (not sure why I did that) and the emission shows good on all of them. The B&K465 is the least fussy about the cutoff, but it shows it being just below acceptable. The others treat it as obviously bad. It actually measures -22v and the the minimum acceptable is -27v.
I think it should actually work, but the contrast might be too high because of the low cutoff. Or it might show the hollow cathode effect.
I'll have to pop it into a set and see how it looks. It might be fine. If not it'll be a candidate for rebuilding if that becomes possible again.
I hope to try building a color wheel someday and that's why I picked it up.
John
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