Quote:
Originally Posted by Kevin Kuehn
I'll check into reducing the horizontal drive even more and report back.
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I'm still trying to make sense of this horizontal scan issue.
I did try lowering the horizontal drive some more. That did improve the horiz linearity some, but then the picture collapses before it reaches optimum linearity. The poor linearity doesn't bother me so much as the wiggle in the horizontal scan lines over on the left screen.
I've also installed a NOS Merit flyback and yoke. Amazingly nothing changed with the picture, other than the Merit yoke causes significant barrel distortion in the picture. Not sure what causes that, so I'm currently using the original yoke and the new Merit flyback. I've even tried changing value of the yoke balancing cap across the top half of the vertical winding. Also tried replacing the damping resistors across the horizontal windings, even with lower values. At least a half dozen NOS damper tubes have be tried, and they show very similar results.
Not sure where to go from here.
Pictures below are with the horizontal width reduced. It does look like there is horizontal blanking on both the left and right sides of the picture. You can also see light and dark vertical lines, typical textbook examples of horizontal ringing on the far left. It's hard to see in the pictures, but I can also see wider light and dark vertical columnes all across the screen.