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#1
08-28-2016, 02:50 PM
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Yes, service manuals for old TVs often tell you to advance the horizontal drive control until such a white line appears, and then back it off just enough to make the line fade out.
Phil Nelson Phil's Old Radios http://antiqueradio.org/index.html 
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#2
08-28-2016, 09:41 PM
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Some sets are also very touchy WRT the horizontal output tube. I have a CTC4 that it took subbing a handful of various HO tubes to find one that would eliminate the drive line. So if adjusting the H-drive doesn't do the trick for you, try subbing a bunch of different HO tubes. You just might find one that eliminates the drive line, where others did not.
__________________
Vacuum tubes are used in Wisconsin to help heat your house. New Web Site under developement ME http://AntiqueTvGuy.com
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