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Date: Thu, 17 Jun 2010 09:56:20 +0100
Message-ID: <AANLkTikv6xeccCUFH2km7jlHWFwQXwdGMQt5H8qvogPc@mail.gmail.com>
From: Roger Lapthorn <rogerlapthorn@gmail.com>
To: rsgb_lf_group@blacksheep.org
DomainKey-Status: good (testing) 
Subject: Re: LF: RE: Who needs antennas! - success with ground electrodes on 
	500kHz
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Folks,

Well I need to do an estimate of ERP with the "earth antenna", so will try
to measure this in the coming days. Jusging by reports so far the system is
about 6-10dB down on my top loaded vertical antenna. The power from the
transverter is 5W still but with the vertical the ERP was only around 1mW
(calculated and measured). So, at a first guess, the ERP is probably around
200uW but perhaps with directivity because of the loop action.

Rik, I could run it overnight tonight if you like to see who can copy me.
Anyone else willing and able to listen overnight tonight please?

73s
Roger G3XBM




On 17 June 2010 09:30, Mike-WE0H <we0h@gmx.com> wrote:

> 3 watts into my 600 meter 70' vertical gets me easy CW copy at 100 miles in
> daylight. If you can get a bit over 100 miles with 5 watts CW in daylight
> with that Earth Electrode antenna, then you know it works damn good.
>
> Mike
> WE0H
>
>


-- 
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM    GQRP 1678      ISWL G11088

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Folks,<br><br><div style=3D"text-align: left;">Well I need to do an estima=
te of ERP with the &quot;earth antenna&quot;, so will try to measure this=
 in the coming days. Jusging by reports so far the system is about 6-10dB=
 down on my top loaded vertical antenna. The power from the transverter is=
 5W still but with the vertical the ERP was only around 1mW (calculated an=
d measured). So, at a first guess, the ERP is probably around 200uW but pe=
rhaps with directivity because of the loop action.<br>
<br>Rik, I could run it overnight tonight if you like to see who can copy=
 me. Anyone else willing and able to listen overnight tonight please?<br><=
br>73s<br>Roger G3XBM<br><br></div><br><br><br><div class=3D"gmail_quote">=
On 17 June 2010 09:30, Mike-WE0H <span dir=3D"ltr">&lt;<a href=3D"mailto:w=
e0h@gmx.com">we0h@gmx.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; bord=
er-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">3 watts into my=
 600 meter 70&#39; vertical gets me easy CW copy at 100 miles in daylight.=
 If you can get a bit over 100 miles with 5 watts CW in daylight with that=
 Earth Electrode antenna, then you know it works damn good.<br>

<br>
Mike<br><font color=3D"#888888">
WE0H<br>
<br>
</font></blockquote></div><br><br clear=3D"all"><br>-- <br><a href=3D"http=
://g3xbm-qrp.blogspot.com/">http://g3xbm-qrp.blogspot.com/</a><br><a href=
=3D"http://www.g3xbm.co.uk">http://www.g3xbm.co.uk</a><br><a href=3D"http:=
//www.youtube.com/user/g3xbm">http://www.youtube.com/user/g3xbm</a><br>
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088<br>

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