So I found this CRT TV on the side of the road. It works ok, but the picture is warped; you can see in the attached photo (don't mind the monitor wave from the camera) I have an old computer hooked up to it and the raster lines at the top of the screen appear vertically stretched, distorting the image and clipping the top portion. Now I don't know much about analog TV (other than the basic theory of using basically some coils to move the beam and draw the raster image at 60 hz ntsc blah blah). Don't ask me how a colorburst signal generator circuit works cause for all I know, there's just a bunch of tiny elves running around inside the ICs making it all work. However, I do have some basic electronics equipment for soldering/desoldering (and some experience soldering/desoldering as well) and also some parts like resistors, caps, diodes etc. I just need to figure out what has caused the warping and how to fix it safely (if even possible). Could it be as simple as tuning a trimpot somewhere in there?