HansLG@aol.com wrote:
> I know concrete is the insulator between railroad tracks. You use the fact
> that the wheels connect the tracks as a mean to check where a train is. I
> suspected though that where were some conductivity although I guess it may
> not be
> considered enough as a good grounding for a lightning strike.
>
the concrete in railroad ties is specially made to be insulating, for
just that reason.
google for "low conductivity concrete" for more data than any human
should want to know...
Jim, W6RMK
> Hans, N2JFS
>
>
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