Hi
The efficiency issue of eleminium versus copper makes me wonder if one
might be able to coat an eleminium 2 meter yagi with copper tape? It would
seem that this would give the antenna a power boost of some type. One would
need to be sure that the RF was running on the outside copper and not on the
supporting metal structure.
Just my musings.
God bless,
Mark
God loves You!
My personal website:
http://www.christiantraditions.info
-----Original Message-----
From: Colin McDonald
Sent: Friday, March 15, 2013 9:15 AM
To: [log in to unmask]
Subject: Re: MFJ 1786 Magnetic Loop Review
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
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