David Klingelhoefer has designed and tested a variation of Thane Heins Bi-Toroid Transformer that outputs more power than is consumed. He has been able to get the primary circuit consumption down to 60 watts, while outputting 480 watts -- 8x overunity.

Full article at:

http://pesn.com/2011/03/20/9501793_T...ice_--_Part_1/