Date: Wed, 6 Sep 2017 08:59:21 -0400
From: Markus Vester <markusvester@aol.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: HF Radio black out / also on VLF!
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Another even stronger one at 12 UT:

http://services.swpc.noaa.gov/images/goes-xray-flux.gif

73, Markus (DF6NM)


-----Urspr=C3=BCngliche Mitteilung-----=20
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mi, 6. Sept 2017 11:56
Betreff: Re: LF: HF Radio black out / also on VLF!


Hi Roelof,=20

 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:=20
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=20
bands, which is normally covered by signals.

I checked it on 3 different antennas: mini-whip, loop and=20
hf-doublet.

73,
Roelof, pa0rdt
Middelburg, JO11tm

 =20

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     File:  HF Radio black out.jpg
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<div style=3D"font-size:10pt;font-family:arial,helvetica,sans-serif;color:b=
lack;"><div style=3D"color: black; font-family: arial,helvetica,sans-serif;=
 font-size: 10pt;">Another even stronger one&nbsp;at 12 UT:<br><br>http://s=
ervices.swpc.noaa.gov/images/goes-xray-flux.gif<br><br>73, Markus (DF6NM)<b=
r><br><br>-----Urspr=C3=BCngliche Mitteilung----- <br>Von: DK7FC &lt;selber=
denken@posteo.de&gt;<br>An: rsgb_lf_group &lt;rsgb_lf_group@blacksheep.org&=
gt;<br>Verschickt: Mi, 6. Sept 2017 11:56<br>Betreff: Re: LF: HF Radio blac=
k out / also on VLF!<br><br></div>
<div id=3D"AOLMsgPart_2_8ad16179-9ada-4fb9-9d0e-4687d80155e5">
<div class=3D"aolReplacedBody" text=3D"#000000" bgcolor=3D"#ffffff">
Hi Roelof, <br>
<br>
Very interesting. It also affects VLF! Clearly visible e.g. at
<a class=3D"aolmail_moz-txt-link-freetext" href=3D"http://www.iup.uni-heide=
lberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html" target=3D"_blank" rel=3D"noo=
pener noreferrer">http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_G=
rabber2.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=3D"about:blank">
  <pre>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=20
bands, which is normally covered by signals.

I checked it on 3 different antennas: mini-whip, loop and=20
hf-doublet.

73,
Roelof, pa0rdt
Middelburg, JO11tm

  </pre>
  <pre><fieldset class=3D"aolmail_mimeAttachmentHeader"></fieldset>
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   ---- File information -----------
     File:  HF Radio black out.jpg
     Date:  6 Sep 2017, 11:07
     Size:  61486 bytes.
     Type:  JPEG-image
  </pre>
</blockquote>


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