SSTC huge flyback version

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

Original poster: "RIAA/MPAA's Worst Nightmare" <mike.marcum-at-zoomtown-dot-com> 

I was thinking of making a giant 15 kW jacob's ladder (5-foot spread) that 
was also portable (not pig/generator powered). I came across this circuit: 
<http://www.repairfaq-dot-org/sam/inverter.gif>http://www.repairfaq-dot-org/sam/inverter.gif 
I was planning on powering it on 180vdc (50 lithium cells in series) 
instead of 12 (having trouble making 1500A primary fit and harder than heck 
to work with). Any ideas on what to change besides the resistors and 
transistors? I think it would be cool to have the frequency drop into the 
audio spectrum as the arc climbed as opposed to the usual 60Hz buzz (roar 
with a pig). I've seen it done with tv flybacks (~200w), but not on this 
scale. The E-core I'll have is 4" cross section with 2x 4.5" windows. Would 
a 1" cross section UU-core work for the "saturable transformer" or is that 
too big? Maybe a regular flyback core there? Thanks for any help/advice.