ok. Tried to get the url, but having troubles isolating the link.

So, google for either
undermagloop.pdf

or "the underestimated magnetic loop antenna"

either of them should get what you want.

fairly long article, but informative.

----- Original Message ----- 
From: "Ron Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, April 28, 2014 9:26 AM
Subject: Re: Alex Loop


> That sounds interesting, Gary.
>
> Ron Miller
>
>> On Apr 27, 2014, at 6:03 PM, Gary Lee <[log in to unmask]> wrote:
>>
>> I have something made by g4tph of similar construction to the alpha loop 
>> =
>> I think.
>>
>> I was not too impressed.  I think the bolted together sections create =
>> extra resistance in the loop.
>>
>> I will send you a pdf article on mag loops.  resistances of tenths of =
>> ohms is to be avoided.
>>
>> it may take me a couple of days to run it down.
>>
>> Gary Lee
>> [log in to unmask]
>>
>>
>>
>> On Apr 27, 2014, at 2:54 PM, Ron Miller <[log in to unmask]> =
>> wrote:
>>
>>> Woo hoo, Gary. You've topped all of the qrp posts I've submitted to =
>> this
>>> list with just one post! I've got to try that, when I get a loop.
>>> =20
>>> The other loop manufacturer I'm checking into is Alpha Delta. I don't =
>> know
>>> much about them yet, but they are an American company and their loop =
>> sells
>>> for about a third of Alex's, loop, without a tripod included.
>>> =20
>>> =20
>>> =20
>>> Ron Miller
>>> =20
>>> -----Original Message-----
>>> From: For blind ham radio operators =
>> [mailto:[log in to unmask]]
>>> On Behalf Of Gary Lee
>>> Sent: Sunday, April 27, 2014 12:47 PM
>>> To: [log in to unmask]
>>> Subject: Re: Alex Loop
>>> =20
>>> For Eric:
>>> =20
>>> wicj mfj box are you speaking of?
>>> =20
>>> for the rest of the list,
>>> I have an alexloop and for portable work it is nice.  very efficient, =
>> =3D but
>>> like all magnetic loops, very narrow band.  It must be retuned about 
>>> =3D=
>> every
>>> 5 kc.  To tune, turn off AGC and tune for max noise.  That will =3D =
>> get you
>>> close enough.
>>> For more general info, go to the alexloop web site.  He has many =3D =
>> articles
>>> on magnetic loop construction.
>>> =20
>>> I have checked into the blind hams 20 meter net using the alex loop =
>> from =3D
>>> inside my living room running ten watts with my elecraft kx3.
>>> =20
>>> Gary Lee
>>> [log in to unmask]
>>> =20
>>> =20
>>> =20
>>>> On Apr 27, 2014, at 12:23 PM, Eric Clegg <[log in to unmask]> wrote:
>>>> =20
>>>> There are two Alex loops available.
>>>> =3D20
>>>> One for $129 that is made of copper tubing and the ends of the 
>>>> tubing=20=
>>
>>>> =3D
>>> have
>>>> to be soldered onto the loops tuing box.
>>>> =3D20
>>>> The other one is priced at over $300 with shipping from Brazil.
>>>> =3D20
>>>> It is made of coax and comes with a travel bag.
>>>> =3D20
>>>> I currently own both of them and yes they can be tuned by ear.
>>>> =3D20
>>>> I also plan to try and use the MFJ tuing box to put between the rig 
>>>> =3D=
>>
>>> and the
>>>> loop to see how easy it is to find a null.
>>>> =3D20
>>>> This box is made to use to tune a manual antenna tuner.
>>>> =3D20
>>>> There are two other loops available.
>>>> =3D20
>>>> One from a place called the Radio S
>>>> tore in Missouri. It also sells for $300 and comes with a bag and =3D
>>> tripod.
>>>> =3D20
>>>> The other loop which is very portalbe comes from Martin Lynch and =
>> Sons=20
>>>> =3D
>>> in
>>>> England.
>>>> =3D20
>>>> It is priced at around $38.
>>>> =3D20
>>>> It can be hooked directly to the back of a Yaesu FT817ND or some =
>> other=20
>>>> =3D
>>> qrp
>>>> rig.
>>>> =3D20
>>>> The loop from missouri has gotten great reviews on eham.
>>>> =3D20
>>>> Hoe this helps,
>>>> =3D20
>>>> Eric Clegg
>>>> KU3I