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I would give La Mesa TV supply in San Diego a call. I bought a service man's hand held style degauss for about 16 bucks. It has a built in switch on the line cord. Their number is 619-469-4220
If you want to make one, you'll need about 150-200 turns of 18 gage lamp cord, a 3 amp line cord style switch, and splice tape to wrap the wire up with. Make a 10 to 12 inch diameter coil.
Turn the coil on AWAY from the set, and slowly approach the face of the tube. Hold the coil about 6-10 inches from the CRT face and go in a slow circular motion from the inside to the outside. Slowly back up a few inches after each revolution. When your about 4 feet away, slowly move the coil up and away from the CRT when your at the end of a rotation. Only turn off the coil when you at least 4 feet away or more or you will leave purity stains.
I would cut the blue and green guns and cut the AGC so you have a red raster and check your purity. The rings on the CRT neck control the center purity. You will need to loosen the yoke and slide it forward or backward to adjust corner purity
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Jordan
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