Message-ID: <5A1AA32F.7050301@posteo.de>
Date: Sun, 26 Nov 2017 12:19:11 +0100
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org>,<5A19FF75.7080801@posteo.de> <579355A36AEE9D4FA555C45D556003AB9AAACC77@servigilant.vigilant.local>
In-Reply-To: <579355A36AEE9D4FA555C45D556003AB9AAACC77@servigilant.vigilant.local>
Subject: Re: LF: Re: DK7FC close to SAQ
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Hello Luis,

thank you for the grabber window :-)
I think you need to use something between 424 and 47 uHz to have a 
chance to see something. But actually i have no idea. It is a new band 
and maybe propagation is different than expected.
At least, from the radiation resistance, the ERP is 6.5 dB higher 
relative to 8.27 kHz and will be another 6 dB higher soon...

73, Stefan


Am 26.11.2017 10:52, schrieb VIGILANT Luis Fernández:
> Hi VLF
>
> Grande Stefan !!!!
>
> Unfortunately have just read your email. This is amazing. I have just 
> set my last window at my grabber
> to try 17.4701 KHz https://ea5dom.ure.es/grabber/index.html
>
> Thoght that this Christmas we would have no SAQ, but then you fixed 
> that ! hi hi
>
> 73 de Luis
> EA5DOM
>
> ------------------------------------------------------------------------
> *De:* owner-rsgb_lf_group@blacksheep.org 
> [owner-rsgb_lf_group@blacksheep.org] en nombre de DK7FC 
> [selberdenken@posteo.de]
> *Enviado:* domingo, 26 de noviembre de 2017 0:40
> *Para:* rsgb_lf_group@blacksheep.org
> *Asunto:* VLF: DK7FC close to SAQ
>
> Hi VLF,
>
> Since 23 UTC a 700 mA carrier is running on *17.4701 kHz*!
>
> It is a little surprise to the VLF community i think ;-)
>
> Legal? Yes: 
> http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/17,47kHz_Sonderlizenz.jpg
> Actually the document has 3 pages but the other ones are no so relevant.
> My ERP is limited to 5 mW. I did not request more because more isn't 
> possible anyway with this antenna.
>
> I wound a big single layer coil with 0.5 mm enameled wire on a PVC 
> tube with 315 mm outher diameter.
>
> 0.7 A is just a first careful step. The coil is designed to hold 1.5 A 
> 'key down'.
>
> The carrier will run the whole night and even tomorrow at daytime.
>
> Worldwide reports are welcome ;-)
>
> It is not sub-9-kHz but still VLF, the 17 km band!! So give it chance :-)
>
> The tree has still some solar power to stream the signal from the EW 
> loop down to the city, so there is a feedback spectrogram at
> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
>
>
> 73, Stefan
>
> PS: I still can hear that tone of the coil. It is terrible! Be happy 
> when you are older than me!

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Hello Luis,<br>
<br>
thank you for the grabber window :-)<br>
I think you need to use something between 424 and 47 uHz to have a
chance to see something. But actually i have no idea. It is a new band
and maybe propagation is different than expected.<br>
At least, from the radiation resistance, the ERP is 6.5 dB higher
relative to 8.27 kHz and will be another 6 dB higher soon...<br>
<br>
73, Stefan<br>
<br>
<br>
Am 26.11.2017 10:52, schrieb VIGILANT Luis Fern&aacute;ndez:
<blockquote
 cite="mid:579355A36AEE9D4FA555C45D556003AB9AAACC77@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;">
  <div>Hi VLF</div>
  <div><br>
  </div>
  <div>Grande Stefan !!!!</div>
  <div><br>
  </div>
  <div>Unfortunately have just read your email. This is amazing. I have
just set my last window at my grabber</div>
  <div>to try 17.4701 KHz&nbsp;<a class="moz-txt-link-freetext" href="https://ea5dom.ure.es/grabber/index.html">https://ea5dom.ure.es/grabber/index.html</a></div>
  <div><span style="font-size: 10pt;"><br>
  </span></div>
  <div><span style="font-size: 10pt;">Thoght that this Christmas we
would have no SAQ, but then you fixed that ! hi hi</span></div>
  <div><span style="font-size: 10pt;"><br>
  </span></div>
  <div><span style="font-size: 10pt;">73 de Luis</span></div>
  <div><span style="font-size: 10pt;">EA5DOM&nbsp;</span></div>
  <div><br>
  <div
 style="font-family: Times New Roman; color: rgb(0, 0, 0); font-size: 16px;">
  <hr tabindex="-1">
  <div id="divRpF792714" style="direction: ltr;"><font color="#000000"
 face="Tahoma" size="2"><b>De:</b> <a class="moz-txt-link-abbreviated" href="mailto:owner-rsgb_lf_group@blacksheep.org">owner-rsgb_lf_group@blacksheep.org</a>
[<a class="moz-txt-link-abbreviated" href="mailto:owner-rsgb_lf_group@blacksheep.org">owner-rsgb_lf_group@blacksheep.org</a>] en nombre de DK7FC
[<a class="moz-txt-link-abbreviated" href="mailto:selberdenken@posteo.de">selberdenken@posteo.de</a>]<br>
  <b>Enviado:</b> domingo, 26 de noviembre de 2017 0:40<br>
  <b>Para:</b> <a class="moz-txt-link-abbreviated" href="mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</a><br>
  <b>Asunto:</b> VLF: DK7FC close to SAQ<br>
  </font><br>
  </div>
  <div>Hi VLF, <br>
  <br>
Since 23 UTC a 700 mA carrier is running on <big><b>17.4701 kHz</b></big>!<br>
  <br>
It is a little surprise to the VLF community i think ;-)<br>
  <br>
Legal? Yes: <a moz-do-not-send="true" class="moz-txt-link-freetext"
 href="http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/17,47kHz_Sonderlizenz.jpg"
 target="_blank">
http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/17,47kHz_Sonderlizenz.jpg</a><br>
Actually the document has 3 pages but the other ones are no so
relevant. <br>
My ERP is limited to 5 mW. I did not request more because more isn't
possible anyway with this antenna.<br>
  <br>
I wound a big single layer coil with 0.5 mm enameled wire on a PVC tube
with 315 mm outher diameter.<br>
  <br>
0.7 A is just a first careful step. The coil is designed to hold 1.5 A
'key down'.<br>
  <br>
The carrier will run the whole night and even tomorrow at daytime.<br>
  <br>
Worldwide reports are welcome ;-)<br>
  <br>
It is not sub-9-kHz but still VLF, the 17 km band!! So give it chance
:-)<br>
  <br>
The tree has still some solar power to stream the signal from the EW
loop down to the city, so there is a feedback spectrogram at<br>
  <a moz-do-not-send="true" class="moz-txt-link-freetext"
 href="http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html"
 target="_blank">http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html</a><br>
  <br>
  <br>
73, Stefan<br>
  <br>
PS: I still can hear that tone of the coil. It is terrible! Be happy
when you are older than me!<br>
  </div>
  </div>
  </div>
  </div>
</blockquote>
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