OK, well, maybe I posted too soon. I just went down and tried it again - fuzzy, blooming out. I changed the 6BK4, and it worked again. So, it must have just been that tube on it's last legs.
I was using the used 6BK4 that came with the set, not the one that came installed in the set - because the one that came in the set made a lot of jingling when I pulled it out when I first started cleaning the chassis. The used one jingled, but not as much. Apparently it works, because it's in there now.
Anyone else had "jingleing" 6BK4's before? I don't see anything loose inside either of them.
-Ian
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