Blueyonder wrote:

The only evacuated tube commonplace in homes today is the TV tube, and look
at how thick the glass is on the from of that to withstand the pressure. TV
tubes are held together by a strong metal band just inside the case from the
front. If that is removed, then the whole thing will explode spectacularly
(and will have your eyes out and most of your face off - so don't even think
about experimenting).


Removing the reinforcing band does not cause the immediate implosion of
the tube, and certainly not on smaller tubes. In addition, imploding a
tube is rarely as spectacular as most people who've never done it make out.



--
Grunff