"David J Windisch" wrote in message ...
This is hilarious. The OP asked a question. And asks it again:

What's the nomenclature for that sweep tube, produced just for Admiral TVs
years ago, that's heavier-duty than any of the other tubes?

I thought it was 6MJ6 -- but, no. It has an *octal* base.

So what kind of base does your mystery tube have?