Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Hightensions-at-aol-dot-com> Hello, I have had the good fortune to have been given 3 30ma 15KV NST's. I was wondering about what size secondary would work best with one of them and also what I should step up to when I run them all together? Any help would be greatly appreciated, Robert