I offer this mostly to display the coils used. The 'Kreosan" guys do
some wacky and dangerous stuff!
Fascinating... And I hadn't heard "Popcorn" in years (you may be
familiar with the hit version from Hot Butter back in the 70s), but it
works well here.
I still think that rather than these new-fangled IGBT drivers, we should
be using selectable rotary spark gaps running at different speeds for
musical coils, a'la the Hammond Organ.
And it's a nice multi coil setup.
I've been meaning to build a set of 6 coils for years - have all the
parts in the garage but haven't got around to it.