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<p>[QUOTE=&quot;Ordinary Fool, post: 2789995, member: 85318&quot;]You&#039;d have to measure the conductivity in Seimens.</p><p><br /></p><p>This would take a pair of jaws sorta like these, along these lines, but, fully insulated from each other, the fixture of phenolic or bakelite, and the dead soft fully annealed copper jaws formed to fit the reeding well, and have means to connect adequately sized leads.</p><p><br /></p><p>[ATTACH=full]647732[/ATTACH] </p><p><br /></p><p>Then hook each jaw up to the leads of a DC tig welder while measuring the voltage drop across the coin while your tig unit displayed B+ voltage and current flow, which I believe would require 100&#039;s of amps, enough to DC weld aluminum (yes you can with stick and not AC high freq) and color the coin.[/QUOTE]</p><p><br /></p>

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