I've never tried it myself, but I suspect that any electrically conductive material would act like a shorted torn, no matter whether it is a copper or aluminum ring, or a piece of wire screen.
I have seen several spectacular museum photos of electrical discharges passing around an insulating glass plate.
I suspect that a simple circular piece of 1/4 to 1/2" Lexan of sufficient diameter would divert a direct strike, but the diversion might be TOWARD the secondary, which would not be good.
Perhaps a large circular plastic disc, big enough to completely shield the primary, and then some, with a grounded, gapped conductive ring below the bottom outer perimeter might work well.
Dave On 7/11/2018 12:08 PM, Chris Boden wrote:
"EM transparent but conductive" Ok, now you've got my attention. On Wed, Jul 11, 2018 at 7:24 AM, bunny Killer <1stbunnykiller@xxxxxxxxx> wrote:instead of an open ring or even a closed ring, how about an EM transparent but conductive "curtain" to protect the secondary? I was thinking something on the lines of Carbon fiber fabric held in place with some type of plastic ring assembly... just a thought :)
_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxxxxxx https://www.pupman.com/mailman/listinfo/tesla