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Hi jhalphen,
Additional questions: When they re-phosphor a P4 CRT do they use the original silver activated Zinc Sulphide + Zinc Cadmium Sulphide or do they use the modern cadmium free P4 replacement?
The modern replacement doesn't look as nice to me because the three components are randomly distributed when mixed. Since it's random it can't be perfectly uniform. You end up with colored blotches. I seem to be the only one that complains about this. Even a color CRT with a monochrome picture looks better to me because it is uniform. Oddly enough I have defective color vision but am still sensitive to this.
Actually, on a large CRT I'd be sitting back far enough to not notice it, but on a small 8" or even 12" it really shows up.
I understand the need to go to cadmium free phosphors, but if they're allowed to use the original for vintage or historical restorations, that would be great.
John
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