Quote:
Originally Posted by mrjukebox160
I wonder why the red screen has a lower voltage range than the other 2?
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The red phosphor is the least efficient of the three phosphors. In order to produce balanced white, the red gun must supply 47 to 67 percent of the total anode current, whereas blue is 11 to 24 percent, and green is 20 to 33 percent.
This is why with the early color CRTs that are under vacuum but weak (say a 15GP22, 19VP22, 21AXP22, or 21CYP2), it is more often than not the red gun that is toast with the blue testing fine, and the green somewhere in-between.