Original poster: "colin.heath4 by way of Terry Fritz <twftesla-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com> hi all im experiancing some wierd results on my 4" x 21" tesla coil i am now running a 5kv 120 ma nst but the primary is now tapped at 2.5 turns is this normal? many thanks colin heath