Quote:
Originally Posted by bandersen
I don't believe he has any ringing issues so no need.
I was just showing him examples of what it looks like.
As far as I know, the remaining issue is the image being slightly off center.
I believe it is either because of physical adjustments being off or horizontal non-linearity where the image is slightly compressed on the left and stretched on the right.
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Yes focus coil position or an unwanted dc current through the horizontal deflection coils.
I still see the dark vertical bands on the left which could be due to a ringing in the first half of the sweep (inefficient horizontal damping?) or the damped flyback somehow modulating the video (poor power supply decoupling or filtering). This is something an oscilloscope would see.
Is the focus coil hole perfectly centered around the neck of the tube? Are the horizontal deflection coils capacitively coupled to the horizontal output transformer? If so a leaky capacitor would shift the image.