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Old 05-18-2011, 11:31 AM
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Tomcomm Tomcomm is offline
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Join Date: Nov 2007
Location: Santa Ynez, CA
Posts: 353
21FBP22A red Accuracy

On the good color bars displayed on my reactivated 21CT55, yellow is best ever while the red is much truer red then the '97 27in Sony which is distinctly orange/red! My two 21FBP22's have differently unenergized phosphor screens. The one in the 21CT55 has a light gray tone while my spare has a greenish tone. My Sony pro monitor has SMPTE-C spec'ed phosphors. Its red is more accurate, not as pure red as the 21CT55, but close. I read somewhere the modern SMPTE phosphors are more orange/red since they produce better "flesh tones" with less accurate chroma demodulators. So anyway, I designate the gray screen CRT as a "rare-earth" 21FBP22A and the green screen CRT as a sulfide 21FBP22. It would be very interesting to see real-time side by side displays of the color bars produced by the NTSC 15GP22 / 21AXP22 and the gray and green screen 21FBP22's.
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