I stumbled across this url tonight: http://www.rosenelectric-dot-com/index.html http://www.rosenelectric-dot-com/page5.html They have a picture of a 100kva coil cranking out some 16 meter arcs and say they are building a 500 kva that will put out 50 meter arcs. They also supply oil filled and dry type transformers and other supplies. Neato....