Thanks guys for the replies. It was on for about a minute, and the filament glowed bright. I do suspect vthe wires connecting the innards of the CRT to the plastic cap. How can I fix this or can it be easier fixed by someone else?
And I was wondering what the glass was for. I'm glad it's there.
As for the ion trap, I suppose it won't be too much of a pain then.
I wonder though, did the 630TS use a field coil inductor and not an electrodynamic speaker? Mine has a electrodynamic speaker as the field coil, with the audio transformer and speaker on a vertical braket, like how they are mounted in radios. Hammond part number 158T is a modern replacement for the field coil, btw.
Thanks.
Jonathan