Hi Cabbott, I just read your post on coupling. I think you are mixing up two things. The guy's coil is definately OVERcoupled. Under coupled coils tend to produce less output, true, but donīt start makin sparks where they shouldnīt (i.e. along the windings). Some of the methods you described DO help, but not because they increase but rather DECREASE the coupling factor. Couldnīt resist picking on you. :-) Coiler greets from germany, Reinhard