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  #9  
Old 05-10-2018, 12:28 AM
old_coot88 old_coot88 is offline
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Join Date: Sep 2009
Posts: 2,646
QUOTE=TUD1;3199299
Quote:
...Push the yoke back and adjust greyscale with the switch in "service" mode,...
Don't push it back all the way against the bell of the CRT. You'll find the 'sweet spot' for best red purity to be about 1/8" to 1/4" shy of being all the way. This is true of all 25" rectangular CRTs.

With 21" roundies, it's about 1/4" to 3/8" shy for best red purity.
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