All the tubes are glowing normally. It's just the way the photo turned out using my camera in low light mode. The brighter tubes are the horizontal output and damper tube. This set has a power transformer and all the tube filaments are in parallel.
I think the CT has enough life left to produce a decent picture. It gets about 1/3 of the way into the green region on my CRT tester. It just got to the edge of green then I did a 3 cycle restore with my CR-70. That's the gentle, current limited mode rather than the manual rejuvination blast mode.
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