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Old 12-24-2009, 07:15 PM
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N9ZQA N9ZQA is offline
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Join Date: Feb 2005
Location: Joliet, Illinois
Posts: 161
Wes -

That's just burn-in from the raster displayed on the CRT. The tubes in a projection set get driven harder than a direct-view set in order to get an image through the optics. That tube looks like it's got a few hours on it.

Somewhere there is a web page that shows burn-in patterns of projection CRTs at various levels of use. If the set showed a decent picture before, it shouldn't be too hard to get the same performance again, especially with fresh coolant.

-Jim
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