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Right now I have a tube in my Bud Tapper with no Green and can't be rejuvenated. Has a recapped WG 19K4906 chassis. Before swapping chassis I thought I would try a spare monitor I have lying around.

I installed a Sampo KGR-1901H monitor today. It worked but the picture scrolled bottom to top. I don't think it was the pot, it just wouldn't click into place and grab a hold if you know what I mean. Adjusted the B+ and it didn't help.

Then we recapped the Sampo chassis, including the 2 big filter caps, and adjusted the B+ to 110.5V.

Picture still rolls. What could it be?

If we can't fix it, then we may have to swap the good tube with the WG chassis as a backup option. Are they compatible?
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