In the late 60's I got a 21" Marconi set with 70' tube, dating I guess from 1959, and someone had already replaced the 6X5 with a then-contemporary solid state plugin unit. I can't remember the brand. For the security of the transformer and the whole set I've got no compunction against using a solid state replacement, such as a Weber, even if I'm trying to keep the set original.
I never knew about the double-magnet ion trap. I have a 10BP4 for which I could never get the beam properly hitting the phosphors. Maybe I was indeed using an insufficient single-magnet beam bender. I still have that tube.
Are you keeping ALL those 30AXX's Bob? I always liked the projecting bevel design.
