Plasma Tweeter

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Mitchell" <Wrenchead-at-starband-dot-net> 

Hi all,
Tomorrow I will attempt the infamous plasma tweeter, my question is, how 
does this thing work?  It has no primary and only an input voltage of a few 
hundred volts, yet maintains a plasma flame large enough to be heard at 
80dB!  Has anyone here built one of these, could it be done without tubes, 
or are tubes best suited for the job...?

Regards - Jim Mitchell