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Re: Tool Steel's

Original poster: Ed Phillips <evp@xxxxxxxxxxx>


Per Zenneck's excellent book ("Wireless Telegraphy", page 16), a spark gap between zinc electrodes had a lower equivalent "gap resistance" than an identical gap between copper electrodes in a simple LC circuit. Zinc (and magnesium!) gaps were therefore considered to be less lossy.

However, because of the additional metal vapor in the gap, zinc electrodes likely also resulted in poorer quenching (than gaps made from copper) when used in coupled LC circuits.

BTW, a scanned copy of Zenneck's 1915 book can be obtained in its entirety through the Internet Archive'a Million Book project. The DjVu file is about 52 MB:

Best regards,


Thanks for the link. I'm lucky enough to have an original in mint condition but hadn't read that part as carefully as you did.