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Originally Posted by yagosaga
P.S.: what is the difference between sulphide phosphors and P1 phosphors? Which CRTs used sulphide phosphors and which P1 phosphors?
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I believe the sulphide tubes have a higher brighness level. The red phosphor more closely matches the green and blue in light output. The sulphide tubes were introduced in the 1962 model year (ie: RCA CTC-11) with the 21FBp22 & 21FJp22 picture tubes.
-Steve D.