https://youtu.be/5imHISfI3Vk This video shows what happens when you go from good coupling to not so good. In this video I am moving one end of the little bipolar out of coupling while the coil is running, and you will see that it effects both ends with diminished performance. Doug _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla