Original poster: "Ed Phillips" <evp-at-pacbell-dot-net> "Original poster: "Jim Mitchell" <Electrontube-at-sbcglobal-dot-net> 6' from a 12 60!!?? Are you sure it's a 12 60? Regards - Jim Mitchell" More important, perhaps, is the power input.What is it? What size primary capacitor are you using? Near resonant? How wide is the gap? Ed