I doubt very much that BWD was making its own crt's ....
BWD is the brand of the oscilloscope, probably not the brand of crt.
Are you sure that the beam is not out of screen ?
What you see is perhaps only a ghost image, not the beam.
Did you measure the Y and X plates voltages ?
I doubt very much that BWD was making its own crt's ....
BWD is the brand of the oscilloscope, probably not the brand of crt. - Yeah, BWD is the brand of the oscilloscope, I will have a look on the crt if there is any brands stamped.
Are you sure that the beam is not out of screen ? - pretty sure it is on the screen, when I go to XY mode, I can see the dot that is pretty bright. But when I switch over to tracing, intensity is just not there. I'd say 30-40% compared to normal scope intensity.
What you see is perhaps only a ghost image, not the beam. - Doubtful, when I have a look at my XY voltages, it puts the beam right at the middle of the screen, just where it is.
Did you measure the Y and X plates voltages ? - I measured and they are moving withing limits what they should be. For X envelope is 180 volts approx. and when the dot is in the middle they measure 90. I forgot what figures were for Y but pretty much correct.