Do all TV's have built in degaussing coils these days?
I have a CRT style TV that's been in service for ~ 4 years and it has been gradually losing "color purity" mostly on the bottom edges in a circular pattern - center good.
I can null out the green or magenta it favors and correct the color by holding a piece of non-magnetized iron in just the right place in front of the screen, one corner at a time, so I'm fairly sure it is a problem with a magnetized chassis or color mask.
I've never heard a 60 cycle buzz when the set fires up the way normal degaussing circuits sound, but didn't think anything of it until the purity started to go out. Could I have skated this long without a problem with no built-in coil? And can they make them totally silent?
Plan A is to whip up a manual degaussing coil. I have 5,000 feet of
24 AWG and figure 3,000 feet on a 14" diameter coil will have a reasonable impedance and use ~60 watts.Plan B is to fix the set