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I'm experimenting with a 20" tube that I have from a TV seeing if I can drive it with a k4900.

I couldn't find the tube code in the CRT database A51LES069X to check the socket type.

I am getting this banding. Purity?

IMG_4017.jpeg

The k4900 is an old chassis so it definitely needs work but not sure that is the issue.

Without signal I get this

IMG_4018.jpeg
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