Thanks for the helpful replies. As far as the video signal goes, I haven't detected any AC on the cathodes of the IF or Video tubes, nor have I detected any on the cathodes of the RF, Osc or Mixer. I haven't tested all the grids. Maybe it's possible some AC is leaking into the video grids and coming out of the anodes of the IF or video tubes.
One thing I'm thinking about is the TV37 had at least 3 production changes. This set however is labeled "TV37" not "TV37U". There
was a little work done in the past on this set and one of the multi section cans was replaced. One production change, represented in Sams shows a 3 section ballast resistor, instead of discreet ones. It's possible the ballast was removed and those resistors weren't completely replaced (only the 470Ω is present in mine, like the Rider's schematic shows)
It could be that the B+/- aren't loaded down enough without the potentially "missing" (if we believe the above scenario possible) two 10Ω.
Later Sams Schematic showing low power supply and ballast resistors:
I'm not sure what my other options are, but I may need to bust open the working TV37 I have once again for a deeper look (I had done this before, scope and all and didn't find any significant difference in the spot checks I performed, but maybe I missed something)