Hi Steve, Here's a you tube link to my T-200, little "candlestick" coil running. It has a tall 4" dia. primary. The wire is #14 neon sign 15KV wire with the thick insulation, so the actual wire spacing is about a 1/4" if I remember correctly. I don't recommend doing what I'm doing in video. You MUST be sure all is running correctly and stable on coil. Again I know there is ALWAYS RISK in doing this. Link: https://youtu.be/NH2TE25k6io And here is a few pics: https://photos.app.goo.gl/DaD7Gkp8ndgTRGT23 https://photos.app.goo.gl/1HDKC8pPavxFtIsv2 https://photos.app.goo.gl/GEb6i836ERoNg5X83 I'll see if I can dig up some more spec. notes tomorrow and post also. Chris Sent from my LG _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla