On Fri 20 May 2022 at 09:33:48 +0200, Francesco Messineo wrote: > it indeed was a "P4" B&W CRT, unfortunately, P4 phosphors were made in > at least 5 different > formulas, each having different "secondary" phosphorescence. The most > common P4 in the '70s > would glow a bit bluish at increased brightness levels. I guess that explains the blue effect, since no matter how I look at various youtube clips, I can't see it as pure white :) Here is another good example which has a lot of screen-time so to speak: https://www.youtube.com/watch?v=jwgsaUtbH3I (Permanent Killer Poke Mod and CRT Spot fix on the Commodore PET 2001). -Olaf. -- ___ "Buying carbon credits is a bit like a serial killer paying someone else to \X/ have kids to make his activity cost neutral." -The BOFH falu.nl_at_rhialto
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