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Date: Sun, 24 Sep 2017 21:43:40 +0200
From: DK7FC <selberdenken@posteo.de>
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References: <15ea03edd54-c07-2a33b@webjas-vab251.srv.aolmail.net> <59C2C034.3070609@posteo.de> <Pine.LNX.4.64.1709201833460.30885@plato.ucs.mun.ca> <59C428C3.7030709@posteo.de> <579355A36AEE9D4FA555C45D556003AB9AA21EE2@servigilant.vigilant.local>,<59C63F96.9040406@posteo.de> <579355A36AEE9D4FA555C45D556003AB9AA226F9@servigilant.vigilant.local>
In-Reply-To: <579355A36AEE9D4FA555C45D556003AB9AA226F9@servigilant.vigilant.local>
Subject: Re: LF: RE: 300 mA on 8270 Hz
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Hi Luis,

Thanks for the informative answer.
IM98xn, a nice location! Can you tell the locator more detailed? :-)
Well, a 1m probe, a 6m pole on the top of a house, that should work very 
well.
The QRM comes and goes.
If you have the time and fun you could drive on a hill where no QRM is 
present. Then use a notebook and SpecLab and record one or two hours and 
produce a nice spectrogram. Just to see that the RX is working well. 
Maybe when the Alphas are back.
Or maybe the QRM is coming from a local coupling path / contaminated earth?

73, Stefan

Am 24.09.2017 16:17, schrieb VIGILANT Luis Fernández:
> Hi Stefan, VLF
>
> Yes. I agree there is work to be made reducing the noise picked by the 
> antenna. Or directly looking for
> an alternative Rx site which less noise
>
> The VLF Rx is already running at my remote Rx location at 7Km from 
> Benidorm. But it is a populated area
> with close neighbours, street lights, etc. The probe is on top of the 
> roof in a 6m pole. Last 1m section made
> with PVC pipe. The location is IM98xn, close to the sea and not very high.
>
> The antenna probe is 1m alu rod 10mm diameter. The MiniWhip is also 
> attached to the last 1m PVC pole
> https://www.dropbox.com/s/1th9zu3neujbn1l/IMG_20170521_173617.jpg?dl=0
>
> I'm using one of your designs, with separated front end right at the 
> probe and the rest down in the shack
> using about 20m 75Ohm TV coax. The details can be found at G3XBM site 
> (fully recommended)
> https://sites.google.com/site/sub9khz/antennas
>
> Will be hard to reduce the noise at this site. So the "B plan" is to 
> build a new E probe and use an spare PC
> to setup a new receiver. I will test this in different locations I can 
> "borrow" and find if it works in any of them
>
> But first in my "To-Do" list is VLF. I'm almost ready to go with 100w 
> just needing some more work
>
> Keep tuned ! ;-)
>
> 73 de Luis
> EA5DOM

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Hi Luis, <br>
<br>
Thanks for the informative answer. <br>
IM98xn, a nice location! Can you tell the locator more detailed? :-)<br>
Well, a 1m probe, a 6m pole on the top of a house, that should work
very well. <br>
The QRM comes and goes. <br>
If you have the time and fun you could drive on a hill where no QRM is
present. Then use a notebook and SpecLab and record one or two hours
and produce a nice spectrogram. Just to see that the RX is working
well. Maybe when the Alphas are back.<br>
Or maybe the QRM is coming from a local coupling path / contaminated
earth? <br>
<br>
73, Stefan<br>
<br>
Am 24.09.2017 16:17, schrieb VIGILANT Luis Fern&aacute;ndez:
<blockquote
 cite="mid:579355A36AEE9D4FA555C45D556003AB9AA226F9@servigilant.vigilant.local"
 type="cite">
  <meta http-equiv="Content-Type"
 content="text/html; charset=ISO-8859-1">
  <style type="text/css" id="owaParaStyle"></style>
  <div
 style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0); font-size: 10pt;">Hi
Stefan, VLF
  <div><br>
  </div>
  <div>Yes. I agree there is work to be made reducing the noise picked
by the antenna. Or directly looking for</div>
  <div>an alternative Rx site which less noise</div>
  <div><br>
  </div>
  <div>The VLF Rx is already running at my remote Rx location at 7Km
from Benidorm. But it is a populated area</div>
  <div>with close neighbours, street lights, etc. The probe is on top
of the roof in a 6m pole. Last 1m section made</div>
  <div>with PVC pipe.&nbsp;<span style="font-size: 10pt;">The location is
IM98xn, close to the sea and not very high.</span></div>
  <div><br>
  </div>
  <div>The antenna probe is 1m alu rod 10mm diameter. The MiniWhip is
also attached to the last 1m PVC pole</div>
  <div><a moz-do-not-send="true"
 href="https://www.dropbox.com/s/1th9zu3neujbn1l/IMG_20170521_173617.jpg?dl=0"
 target="_blank" style="font-size: 10pt;">https://www.dropbox.com/s/1th9zu3neujbn1l/IMG_20170521_173617.jpg?dl=0</a></div>
  <div><br>
  </div>
  <div>I'm using one of your designs, with separated front end right at
the probe and the rest down in the shack</div>
  <div>using about 20m 75Ohm TV coax. The details can be found at G3XBM
site (fully recommended)</div>
  <div><a moz-do-not-send="true"
 href="https://sites.google.com/site/sub9khz/antennas" target="_blank"
 style="font-size: 10pt;">https://sites.google.com/site/sub9khz/antennas</a></div>
  <div><br>
  </div>
  <div>Will be hard to reduce the noise at this site. So the "B plan"
is to build a new E probe and use an spare PC</div>
  <div>to setup a new receiver. I will test this in different locations
I can "borrow" and find if it works in any of them</div>
  <div><br>
  </div>
  <div>But first in my "To-Do" list is VLF. I'm almost ready to go with
100w just needing some more work</div>
  <div><br>
  </div>
  <div>Keep tuned ! ;-)</div>
  <div><br>
  </div>
  <div>73 de Luis</div>
  <div>EA5DOM</div>
  </div>
</blockquote>
</body>
</html>

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