OK...
this is a bit weird.
This tube has ALWAYS been brighter in this TV, the 1st video amp, 6AU6, it flashes MUCH brighter when first turned on, then dims down a bit, but is always brighter than all the other tubes, but always seemed to work, an RCA branded tube. may be one of the original tubes.
http://suzaku.live-evil.org/0209241844b.jpg
Just to see what would happen, stuck in a NOS sylvania, and it warms up slow like the others, and is not as bright as the RCA that was removed, not seen a tube act like this before, almost as if they mis branded a 4AU6 as a 6AU6 :O
weird.