Does anyone have any info on this set? About 12 years old. Turn it on
and it works fine except if you are watching a channel above 20. Set
it for 68 when cold and it is fine. In about 30 minutes raster turns
to heavy noise. Drop down to 67 and it will be fine for a minute or
so, drop down another, etc, etc, until you get to 20 or lower as they
remain fine.

Bruce