[TCML] primary tubing
frosty90 at gmail.com
Sat Nov 7 18:04:55 MST 2009
According to a quick goolge, the skin depth of aluminium is actually
(slightly) greater than copper at the frequencies we care about. But then it
does have a higher resistivity, so its difficult to call without some actual
calculations or measurments. In any case I would take a guess that the
difference is not going to be anything worth worrying about.
If we agree that things would be a wash if the aluminum conductor diameter
> was increased to normalize the DC-resistance, then I don't see any
> suggestion that aluminum is inferior at RF frequencies any more-so than at
> DC. It's your statement suggesting that the resistance if frequency
> dependant that I take issue with.
> Perhaps we're in violent agreement that it's simply better to just use
> copper for the primary conductor, which is fine. I've just seen too many
> who beleive that ANY use of aluminum in a Tesla coil is unsuitable because
> skin effect will render it a lossy and terrible conductor, which just isn't
> true. I've seen folks suggest that one should not have solid aluminum
> electrode holders and supports in an RSG, which is just silly.
> Regards, Gary Lau
> MA, USA
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