One step forward and two back on the big DuMont. I shorted out the time delay relay, brought it up on a variac, and got some basic signs of life. Jug lights up!
It will of course need a complete recapping.
I can not get the bracket that holds the yoke and ion trap unscrewed from the cabinet; I stripped one of the screws
Does anyone know if there is a way to get the 20BP4 put from the front of the cabinet? It looks awfully similar to the arrangement on the Westminster, which you can remove from the front.