Phillip, Tesla List wrote: > Original Poster: Philip <shadow42-at-totcon-dot-com> > > The coil is 4.5" x 20" #24 awg unloaded I 234khz. > Philip Freq. is too low. Here is what I came up with. (#24 magnet-closewound-full length) These are approximates, but should be close. Bart Turns ~ 900 Inductance ~ 18.2mH h/d ratio ~ 4.4 dc resistance ~ 27 ohms weight of wire ~ 1.28lbs K ~ 0.76 Cself ~ 8.7pF Freq ~ 400kHz (unloaded)