Re: Aluminum bar as stationary electrode holder? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 24 Aug 2007 10:40:07 -0700
From: Ed Phillips <evp@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Aluminum bar as stationary electrode holder? (fwd)

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Thu, 23 Aug 2007 23:15:38 -0500
>From: resonance <resonance@xxxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: Aluminum bar as stationary electrode holder? (fwd)
>
>
>
>Avoid aluminum --- it's conductance is too low at RF frequencies.  It works 
>fine at 60 Hz but not HF. It will work but really limits your peak primary 
>current.
>
>Since potential across an inductor depends on peak current, you want it as 
>high as possible.  Keep inductance as high as possible also by using a large 
>dia. sec coilform.
>
>Vsec = -L x dI/dt
>
>
>
>Dr. Resonance
>
    Sorry - can't agree with your comment about aluminum.  I've it used 
very successfully in low-loss RF circuits up through 36 GHz and the 
difference in losses compared to silver-plated copper is barely 
measurable.  I can't imagine any significant difference from copper in 
the proposed application.

Ed