Message-ID: <59AFC5E8.30506@posteo.de>
Date: Wed, 06 Sep 2017 11:54:48 +0200
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <15e4d1026af-c0a-3b162@webjas-vad110.srv.aolmail.net>, <Pine.LNX.4.64.1709052129280.8166@plato.ucs.mun.ca> <59AFBCC8.30526.85484C@roelof.ndb.demon.nl>
In-Reply-To: <59AFBCC8.30526.85484C@roelof.ndb.demon.nl>
Subject: Re: LF: HF Radio black out / also on VLF!
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Hi Roelof,

Very interesting. It also affects VLF! Clearly visible e.g. at 
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
It happens since about 9 UTC.
Would have been interesting to observe the propagation on 8.27 kHz 
during that time...

73, Stefan

Am 06.09.2017 11:15, schrieb Roelof Bakker:
> Hello all,
>
> Now something different:
>
> It looks like a severe radio black out of HF is ongoing.
> I have never seen this before. See attachment.
>
> This is also an opportunity to look at PLC interference at the lower
> bands, which is normally covered by signals.
>
> I checked it on 3 different antennas: mini-whip, loop and
> hf-doublet.
>
> 73,
> Roelof, pa0rdt
> Middelburg, JO11tm
>
>    
>
>
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>     ---- File information -----------
>       File:  HF Radio black out.jpg
>       Date:  6 Sep 2017, 11:07
>       Size:  61486 bytes.
>       Type:  JPEG-image
>    

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Hi Roelof, <br>
<br>
Very interesting. It also affects VLF! Clearly visible e.g. at
<a class="moz-txt-link-freetext" href="http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html">http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html</a><br>
It happens since about 9 UTC.<br>
Would have been interesting to observe the propagation on 8.27 kHz
during that time...<br>
<br>
73, Stefan<br>
<br>
Am 06.09.2017 11:15, schrieb Roelof Bakker:
<blockquote cite="mid:59AFBCC8.30526.85484C@roelof.ndb.demon.nl"
 type="cite">
  <pre wrap="">Hello all,

Now something different:

It looks like a severe radio black out of HF is ongoing.
I have never seen this before. See attachment.

This is also an opportunity to look at PLC interference at the lower 
bands, which is normally covered by signals.

I checked it on 3 different antennas: mini-whip, loop and 
hf-doublet.

73,
Roelof, pa0rdt
Middelburg, JO11tm

  </pre>
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     File:  HF Radio black out.jpg
     Date:  6 Sep 2017, 11:07
     Size:  61486 bytes.
     Type:  JPEG-image
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