Re: Aluminium aka Aluminum Wire (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 30 Sep 2007 10:25:31 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Aluminium aka Aluminum Wire (fwd)

Neat Ed!

Q won't double with annealed copper, but it should be about 1.6 times 
higher. It will be interesting to see what occurs.

Take care,
Bart

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Sat, 29 Sep 2007 17:57:37 -0700
>From: Ed Phillips <evp@xxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Aluminium aka Aluminum Wire
>
>    Just wound the following coil from #10 aluminum wire:
>
>    12 turns
>    3.5" diameter
>    3" long
>    Approximate inductance 8.45 uH
>
>F kHz      Q
>2500      375
>3000      425
>2800      465
>5000      510
>
>Measurements were made with a Heathkit Q meter [regular Boonton too 
>heavy to lift onto bench with my bad back] which seems to have an 
>accuracy of better than 10%  Wire had been sitting on a peg for several 
>years and leads weren't cleaned.  Connections via clip leads and banana 
>plugs, hardly the best..  Bottom frequency was set by capacitor in 
>meter.  I have bigger capacitors of high Q and will try to extend the 
>measurement lower at some time or other.  But I'm sure the frequency 
>doesn't change the accuracy of the comparison of aluminum and copper.
>
>    Tomorrow I'll wind the same coil with #10 copper and compare 
>results.  Expect them to be similar but a little better but not by a 
>factor of anywhere near 2..
>
>    Bottom line is that "aluminum ain't anywhere near as bad as it's 
>cracked up to be - nowhere near".
>
>    Results of other experiments welcome.
>
>Ed
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