Anyone know what causes this?

[Charlie]

On many of my b&w sets, there is a verticle line on the left side of the screen. Usually, I only see it between scenes. It's not really noticeable if there's a picture on the screen.

The screen shot below is on my Philco Diamond D set. I also see the same line on my b&w '63 Curtis Mathes, '72 Zenith, '58 Magnavox, and '59 Predicta. Doesn't seem to matter what source I'm using... cable, DVD, air... it's still there.

I've never noticed this on my color sets... just the b&w ones.

This doesn't really bother me... like I said... it's really only noticeable between scenes. Since I have a handfull of sets doing this, I thought maybe someone else might have experienced this as well... and found its remedy???

Note: Don't pay attention to the horz line at the bottom and other wavy lines... those are cause by the digital camera.