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Old 08-09-2009, 07:44 PM
radio nut's Avatar
radio nut radio nut is offline
Born in the wrong decade
 
Join Date: Dec 2007
Location: Lima, Ohio
Posts: 836
white lines

I borrowed a scope and calibrated my CBS-Columbia Model (not sure) Chassis 1604 (sam's set317 folder 3). After I was done the white line I mentioned in another thread is still there. It goes from the top to the bottom.I have subbed in all Horiz. tubes. All caps in the horiz. are new and any resistors that were not really close were changed. The hold contol does move the line around on the screen from left to right. There are also less noticeable ghost white lines to the left of the main line.Most of the time these lines are very hard to see unless the screen is mainly black.The linearity is fine. I have also put a 100pf cap in the damper circuit. Plus the damper tube was subbed and made no difference. I even tried subbing caps in for the ones on the diagram that were different values for "some sets".Well, Now what?I am lost. There is one cap to goes to ground right before the horiz. drive adjustment that should be 1200pf. and all I can find locally is 1000pf., is this enough to make a difference? I was told that in the old days capacitors did not have a "tight" tolerance and that 1000pf was close enough.

Last edited by radio nut; 08-09-2009 at 08:37 PM. Reason: added more info
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