Quote:
Originally Posted by zeno
99% chance its the pix tube. If you have a tester
with "clean & balance" try that. Heavier rejuve comes with
risk......
73 Zeno 
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See how red cuts off in comparison to the other three when you run the screen controls up and down.
I have an RCA CTC 12 with this same issue and the 21FJP22 CRT cutoff tests great for green (of course

), marginal for blue but red is far behind both.
I have a B&K 467 with three meters, so you see the cutoff variations in comaprison.
The emission alone seems OK on all three but when you compare separate rasters, not so much.