This video may be of interest to some of the newer coilers, I am sure you "old salts" are pretty familiar already with the importance of coupling! I was not, until l played with this for a while. I built this little bipolar specifically to educate myself of the importance of proper coupling so maybe now I can modify the coils I have already built for better performance. https://youtu.be/e_TlrxQEBok Thank you, Bert & David for your helpful advice on this "little" project. _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla