Okay hella bump time but my shipment of replacement 6BQ7A's and another 6AU5 arrived so now we have a scope fully loaded down with what should all be good tubes.
Still no trace.
With all the tubes in place and lit as soon as the delay closes I get a beam flash in the upper left of the display and then the beam finder arrows say there's something tracking left to right (the speed of which changes relative to but not exactly with horizontal sweep time) and even when I vertically center the control I don't see anything. Yes I can see neck glow.
The reason I got a spare 6AU5 was as soon as the delay closed the one in the high voltage section would light the glass a dull blue and after five minutes or so you could see it starting to redplate. The replacement tube should be good but when swapped does the same thing.
