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Date: Mon, 27 Sep 2010 20:34:36 -0400
Message-ID: <AANLkTikh_GiF_6=hom47W601sW8OeC3eT6JAA-yo7XX7@mail.gmail.com>
From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Earth Antennas
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Sandy,
      These results are not very impressive!
I have done much better than that with either a top loaded 80' vertical or a
transmit loop!

 Also, it is hard to see how an LF antenna could favor skywave over
groundwave!


-- 
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1


On Mon, Sep 27, 2010 at 8:20 PM, Nan and Sandy Sanders <radiodog77@pobox.com
> wrote:

> Hi all. About 8 or 9 years ago AMRAD installed what we called an earth
> bipole. From our web page http://www.amrad.org/projects/lf/
>
> "AMRAD has built a 1500 foot long bipole antenna. This is a wire that goes
> through the woods and is connected on one end to a 300 foot steel well
> casing and a ground rod in lake on the other. It is tuned to resonance with
> two large coils near the ends and a ferrite toroid transformer gets it all
> to 50 ohms for the transmitter. Initially it was not strong back here in the
> Washington DC area. But now it looks like the signal is pretty good further
> out. It may favor sky wave to ground wave. Recent results have been good
> with reception into London, Ontario Canada by Mitch Powell VE3OT. His zipped
> .wav file can be downloaded <http://www.amrad.org/projects/lf/wa2.zip>here.
> Note that it is almost 750k. This reception is about 324 miles or 521 km.
> Closer in we have reception confirmed from Steve Dove W3EEE/G3YDV at Mt.
> Gretna PA. "
> Note:  here= http://www.amrad.org/projects/lf/wa2.zip
>
> The wire was attached to trees about 15 feet off the ground and it was fed
> about 100w and keyed at 5 wpm. We always had problems getting people to
> listen for us outside the local area. We lost interest after our FCC would
> not give us 137Khz as an amateur band.
> One thing I learned during the installation of this antenna is that if you
> step into waist deep mud and cannot get your self out, your fellow amateurs
> will laugh and take photos of you before they will help you get out.
> I think that AMRADs and Stefan's experience show that this type of antenna
> is worth some investigation.
>     Sandy
>     WB5MMB
>
>

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Sandy,<div>=A0=A0 =A0 =A0These results are not very impressive!</div><div>=
I have done much better than that with either a top loaded 80&#39; vertica=
l or a transmit loop!</div><div><br></div><div>=A0Also, it is hard to see=
 how an LF antenna could favor skywave over groundwave!=A0</div>
<div><br></div><div><br>--=A0<br>73 Warren K2ORS<br>=A0 =A0 =A0 =A0 =A0 =
=A0 =A0 =A0 WD2XGJ=A0<br>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XSH/23<br>=A0=
 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2<br>=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=
 WE2XGR/1<br><div class=3D"gmail_quote"><br></div><div class=3D"gmail_quot=
e">
<br></div><div class=3D"gmail_quote">On Mon, Sep 27, 2010 at 8:20 PM, Nan=
 and Sandy Sanders <span dir=3D"ltr">&lt;<a href=3D"mailto:radiodog77@pobo=
x.com">radiodog77@pobox.com</a>&gt;</span> wrote:<br><blockquote class=3D"=
gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex;">
Hi all. About 8 or 9 years ago AMRAD installed what we called an earth bip=
ole. From our web page <a href=3D"http://www.amrad.org/projects/lf/" targe=
t=3D"_blank">http://www.amrad.org/projects/lf/</a><br>
<br>
&quot;AMRAD has built a 1500 foot long bipole antenna. This is a wire that=
 goes through the woods and is connected on one end to a 300 foot steel we=
ll casing and a ground rod in lake on the other. It is tuned to resonance=
 with two large coils near the ends and a ferrite toroid transformer gets=
 it all to 50 ohms for the transmitter. Initially it was not strong back=
 here in the Washington DC area. But now it looks like the signal is prett=
y good further out. It may favor sky wave to ground wave. Recent results=
 have been good with reception into London, Ontario Canada by Mitch Powell=
 VE3OT. His zipped .wav file can be downloaded &lt;<a href=3D"http://www.a=
mrad.org/projects/lf/wa2.zip" target=3D"_blank">http://www.amrad.org/proje=
cts/lf/wa2.zip</a>&gt;here. Note that it is almost 750k. This reception is=
 about 324 miles or 521 km. Closer in we have reception confirmed from Ste=
ve Dove W3EEE/G3YDV at Mt. Gretna PA. &quot;<br>

Note: =A0here=3D <a href=3D"http://www.amrad.org/projects/lf/wa2.zip" targ=
et=3D"_blank">http://www.amrad.org/projects/lf/wa2.zip</a><br>
<br>
The wire was attached to trees about 15 feet off the ground and it was fed=
 about 100w and keyed at 5 wpm. We always had problems getting people to=
 listen for us outside the local area. We lost interest after our FCC woul=
d not give us 137Khz as an amateur band.<br>

One thing I learned during the installation of this antenna is that if you=
 step into waist deep mud and cannot get your self out, your fellow amateu=
rs will laugh and take photos of you before they will help you get out.<br=
>

I think that AMRADs and Stefan&#39;s experience show that this type of ant=
enna is worth some investigation.<br>
 =A0 =A0 Sandy<br>
 =A0 =A0 WB5MMB <br>
<br>
</blockquote></div><br><br clear=3D"all"><br><br>=A0<br>
</div>

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