wrote:

This video is worth watching....

https://www.youtube.com/watch?v=C3_-2fUm6y0

1000 Watts audio at Full Power.....


** The blue glow is caused by *fluorescence* - fast electrons striking the glass of the tube excite minerals on the surface.

Cerenkov radiation is a very different thing, happening only with particles that are travelling close to the speed of light.


..... Phil