Predicta vertical ghost line

[Don Lindsly]

That set does not have a horizontal drive or linearity control. The width control adjusts HOT screen voltage.

The "moveable" line is usually a result of an imbalance or over correction in the horizontal phase detector circuit. The resistors and caps in the feedback network and sync amp plate resistors are the first suspects. Aligning the horizontal oscillator sometimes helps. A model or chassis number would help for more specifics.

It may come and go depending on the signal source.