Original poster: "stephenlye by way of Terry Fritz <twftesla-at-uswest-dot-net>" <stephenlye-at-xtra.co.nz> Hey all, I just found a web site that shows how a tesla coil can be made but it is from a really old book and was wondering what kind of sparks I should estimate from this kind of coil. The website is http://www.freeweb.pdq-dot-net/headstrong/ind2.htm Thanx Roy