What am I looking at?

retroACTIVE

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I was just about to put my 19K4915 med res monitor for sale and when I was going over it i looked in the top of the tube, behind the metal banding and it looks like there is a foil cone or something that contours the tube that is flopping around in there....

The monitor actually works fine but I don't like what I am seeing, it doesn't seem right... something has broken loose in the tube...

Anyway... what am I looking at? Tube anatomy to me is gun and phosphorus... I know there is more to it than that. ;P

If you look at the pic you can kind of see the little copper A shaped wire and the "foil" that it is attached to.
 

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It may be one of the springs that hold the faceplate in position against the front of the screen. If the faceplate is wobbling at one corner, I would think that you do not have good color reproduction in that area.

If the monitor is jarred while it is on, do you see an effect on the screen?

I can't really make out what is in the photo.

K
 
I can't really tell what you're looking at there from the photo - but from your description, it sounds as if something is loose? Can you hear it rattling around?

There is a lot more to the inside of a tube than just the gun and phosphors. Inside the face of the tube is the shadow mask - a mesh plate that helps to prevent an electron beam from hitting the wrong phosphor. This mask is what becomes magnetized and is what you're degaussing with a degaussing coil.

If it's loose, then it'll screw up the colors. It should not be loose - it shouldn't be able to move at all.

-Ian
 
Sorry for the crappy pic... It's definitely metallic and flopping around.

I'm not going to sell this bad boy as a "working" monitor. I'll strip it and sell off all of the parts... med res monitor - tube.
 
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