I did read the article, very good.  Once you get past all the scientific and 
chemical compound stuff, the meat of the article is good.
What we think of as aluminium or aluminum is the processed, smelted type 
which is quite obviously a man made invention.  Then again, so is steal and 
iron and all that stuff...though formed iron appears natively in nature, 
whereas formed aluminium doesn't, at least not much.
Aluminium seems to be one of those naturally friendly compounds that we can 
use with little danger to biological life.
Interestingly enough, acording to the article, aluminum has only 59 per cent 
of the conductivity of copper in material that is 99 per cent or higher.
So, your aluminium antenna elements are less than 60 per cent efficient 
conducters of electricity compared to copper elements.
Of course, copper being rather scarce compared to aluminum makes it far more 
expensive, and it's much heavier and cannot be processed for strength and 
durability and corosion resistance like aluminium can.

cool stuff

73
Colin, V A6BKX
----- Original Message ----- 
From: "Lou Kolb" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 14, 2013 6:32 PM
Subject: Re: MFJ 1786 Magnetic Loop Review


> It's not an invention but a natural resource.  If you look for aluminum on
> Wikipedia it will redirect you to aluminium.  Apparently, it is the most
> abundant metal in the earth's crust.
> Lou Kolb
> Voice-over Artist:
> Radio/TV Ads, Video narrations
> Messages On-hold:
> www.loukolb.com
> ----- Original Message ----- 
> From: "Curtis Delzer" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, March 14, 2013 8:22 PM
> Subject: Re: MFJ 1786 Magnetic Loop Review
>
>
>> isn't the product an American invention? :)
>>
>> At 02:45 PM 03/14/13, you wrote:
>>>I was going to reply the same thing but thought he might be being funny
>>>since I've gone back and forth many time with people from England about
>>>that.
>>>----- Original Message -----
>>>From: "Buddy Brannan" <[log in to unmask]>
>>>To: <[log in to unmask]>
>>>Sent: Thursday, March 14, 2013 5:27 PM
>>>Subject: Re: MFJ 1786 Magnetic Loop Review
>>>
>>>
>>> > Sorry to be disagreeable Curtis, but "aluminium" is correct
>>> > non-American =
>>> > spelling.=20
>>> > --
>>> > Buddy Brannan, KB5ELV - Erie, PA
>>> > Phone: (814) 860-3194 or 888-75-BUDDY
>>> >
>>> >
>>> >
>>> > On Mar 14, 2013, at 5:20 PM, Curtis Delzer <[log in to unmask]> wrote:
>>> >
>>> >> be careful of misspellings, the word is aluminum
>>> >> you wrote aluminium
>>> >>=20
>>> >> <grin> happens even with spell checkers.
>>> >>=20
>>> >> At 02:01 PM 03/14/13, you wrote:
>>> >>> Hi All,
>>> >>>=20
>>> >>> I've just posted a review of the MFJ 1786 magnetic loop, by Ian =
>>> > DJ0HF, to
>>> >>> the Active Elements website.  At only 1 metre in diameter, it is a
>>> >>> fascinating HF antenna, and Ian has written the review with a blind 
>>> >>> =
>>> > operator
>>> >>> very much in mind.
>>> >>>=20
>>> >>> The direct link is:
>>> >>>=20
>>> >>> http://active-elements.org/2013/03/14/mfj-1786/
>>> >>>=20
>>> >>> Best wishes, Kelvin Marsh - M0AID
>>> >>>=20
>>> >>> Working to improve accessibility for radio amateurs with 
>>> >>> disabilities
>>> >>>=20
>>> >>> www.active-elements.org
>>> >>>=20
>>> >>> For accessibility evaluations of amateur equipment and MP3 manuals