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Re: Spark gap metals

Original poster: "Steve Cook" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

Most heatsinks are Al, not a good move (a) the melting point  for Al is
660C, for Cu  1083C, for W 3370C, (b) the chemical reactivity of Al is very
high, you would at best be left with a pile of oxide.

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, April 10, 2005 10:17 PM
Subject: Spark gap metals

> Original poster: "Steven Steele" <sbsteele@xxxxxxxxxxxxx> > > Why are ya'll so concerned about the metal your spark gaps are made of? > As long as your the metal has enough surface area( to radiate heat) and you > keep blowig air on it(like with a muffin man... I mean fan), it won't melt > and it would be fine. > You could even make a fine spark gap by replacing the copper pipes or > tungsten rods with old heat sinks from scrap computers.Besides, isn't > tungsten expensive? > Trust me, I may be new at this, but I can tell you that fan cooled heat > sinks or at least copper pipe(the longer the better) will do just as good, > if not better, than tungsten rods. > Also, the tungsten rods have less surface area than a copper pipe and > therefore more likely to get really hot, and even though tungsten cand > stand more heat, it doesn't need to as long as you cool it right. Tungsten > rods are just a waste of money and tungsten. > > Steven Steele > >