Westinghouse H886K21

[Eric H]

Pull the cap off the top of the 1B3 and see if you can draw a nice blue arc to the tip of an ungrounded (plastic handle) screwdriver, if you get a good arc and the buzz is gone then the problem is probably after the tube, perhaps under the base of the 1B3. It could be a gassy 1B3 but those usually just glow purple without any noise.
It's possible you cracked it somehow and completely let the vacuum out, in that instance it might arc and buzz internally.