Waveguide earthing?

Our Finest Hour, Sun Jan 11 2009, 05:43AM

I have tried to find where I read it but there was a post on a chat room which said that is was not necessary to earth or bond the waveguide to the source (Apparently the writer epoxyed the horn onto his magnatron/chassis?)

Not sure why it could not be attached with bolts/screws as usual but it did raise the question in my mind as to the theory.
Does a bonded waveguide present a better path or does it not matter!!???????????;-)

All any opinions as ever welcome