I just listed an experimental 7 AWG Tesla coil primary on eBay. See https://www.ebay.com/itm/173993697175?ul_noapp=true The coil itself is unremarkable but I wanted to call attention to the experiment that I performed when I built this coil, to compare the AC resistance over a range of operating frequencies, comparing various coil materials and geometries. That experiment is documented here: http://www.laushaus.com/tesla/primary_resistance.htm Happy reading al! Regards, Gary Lau MA, USA _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla