To: | <donovanf@starpower.net>, "topband" <topband@contesting.com> |
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Subject: | Re: Topband: Spark gaps |
From: | "Bill Wichers" <billw@waveform.net> |
Date: | Fri, 27 Jul 2012 11:06:12 -0400 |
List-post: | <topband@contesting.com">mailto:topband@contesting.com> |
You can get chrome steel balls too and they are *very* hard (usually used for ball bearings). You have to drill them with solid carbide drills. I don't think it would be possible to thread the holes using normal taps though. -Bill [snip] > Very hard steel balls such as carbon or tungsten are ideal for > withstanding multiple lightning strikes without need for inspection and > replacement, but at higher cost. _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK |
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