Quote:
Originally Posted by old_tv_nut
The original red phosphors were close to NTSC standard. The all-sulphide tube (zinc cadmium-sulfide for red) was probably the most orange, and got worse at high beam currents. The vanadate rare-earth red was pretty close to standard. The europium red that eventually became the norm is a bit orangy again, but not as bad as the sulfide.
Vanadium and europium are "rare earth" elements.
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Is there a source that tells you what phosphors were used in various early color tubes? Just curious.
Phil Nelson
05-16-2011, 03:45 PM
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