Re: Aluminium aka Aluminum Wire (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 30 Sep 2007 10:51:00 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Aluminium aka Aluminum Wire (fwd)

If you wind with #12, the only thing that will be comparable is the DC 
resistance. Q should still be about 1.5 times higher with #12 at each 
frequency tested. Maybe that is a good test!

Take care,
Bart

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Sun, 30 Sep 2007 09:23:40 -0400
>From: "Lau, Gary" <Gary.Lau@xxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Cc: evp@xxxxxxxxxxx
>Subject: RE: Aluminium aka Aluminum Wire (fwd)
>
>Perhaps it's that UK Aluminium that's bad, rather than the good-old US
>Aluminum that we had been using ;-)
>
>If I may suggest, try winding the copper coil with #12 copper so that
>the DC resistance is comparable.
>
>Regards, Gary Lau
>MA, USA
>
>  
>
>>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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