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On 7/11/18 11:58 AM, David Speck wrote:
I would think that "EM transparent" and "electrically conductive" are
mutually exclusive in the frequency ranges we are dealing with.
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.
This discussion started out with "how do we avoid a secondary winding
strike causing damage"
Probably ANY material in front of the wire, if sufficiently thick, will
disperse the energy density enough to prevent damage. Although, sparks
will make nice pinholes (in skin or plastic or whatever)
If it spreads around a plate, that's probably ok.
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