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Date: Tue, 03 Jun 2014 11:29:25 +0100
From: Gary - G4WGT <g4wgt@tiscali.co.uk>
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Subject: Re: LF: 474kHz commercial signal
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Hi Mike, LF,

I can't say that I have seen that signal but I will certainly look for it.

I have a similar signal on 136.160kHz at the moment which on this 
occasion started at 1701utc on 2/06/2014.
Also a little while ago the same/similar strength signal was on 
136.500kHz for a few days.
I and others on the LF group suspected a mixing product with the very 
strong signal at my location on 81kHz.
During the long period of time (years) I have monitored 136kHz band I 
have not seen these signals before.
As far as I know nothing at my station has changed.

It was suggested the other part of the mix may be around 55kHz.
I am now monitoring the area round that frequency to see if any Tx's 
stop & start at the same times.

I would be interested if anyone else has seen these signals.

See my grabber.

*73, de Gary - G4WGT
                             
MF-LF-VLF Grabber : http://myweb.tiscali.co.uk/wgtaylor/grabber2.html
Web : http://myweb.tiscali.co.uk/wgtaylor/index.html*

.

On 03/06/2014 10:20, Mike Dennison wrote:
> I presume this has been discussed before and I missed it.
>
> What is the origin of the quite strong, wide RTTY-like signal on
> 474.0kHz? It appears to be commercial as it is on continuously, and
> it comes up after dark every day.
>
> For a while I presumed this was a funny on my receiver, but it
> appeared on another receiver with different architecture, and also on
> DK7FC's grabber.
>
> Mike, G3XDV
> ==========
>


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    <div class="moz-cite-prefix">Hi Mike, LF,<br>
      <br>
      I can't say that I have seen that signal but I will certainly look
      for it.<br>
      <br>
      I have a similar signal on 136.160kHz at the moment which on this
      occasion started at 1701utc on 2/06/2014.<br>
      Also a little while ago the same/similar strength signal was on
      136.500kHz for a few days.<br>
      I and others on the LF group suspected a mixing product with the
      very strong signal at my location on 81kHz.<br>
      During the long period of time (years) I have monitored 136kHz
      band I have not seen these signals before.<br>
      As far as I know nothing at my station has changed.<br>
      <br>
      It was suggested the other part of the mix may be around 55kHz.<br>
      I am now monitoring the area round that frequency to see if any
      Tx's stop &amp; start at the same times.<br>
      <br>
      I would be interested if anyone else has seen these signals.<br>
      <br>
      See my grabber.<br>
      <pre class="moz-signature" cols="72"><b>73, de Gary - G4WGT
                            
MF-LF-VLF Grabber : <a class="moz-txt-link-freetext" href="http://myweb.tiscali.co.uk/wgtaylor/grabber2.html">http://myweb.tiscali.co.uk/wgtaylor/grabber2.html</a>
Web : <a class="moz-txt-link-freetext" href="http://myweb.tiscali.co.uk/wgtaylor/index.html">http://myweb.tiscali.co.uk/wgtaylor/index.html</a></b>

.</pre>
      On 03/06/2014 10:20, Mike Dennison wrote:<br>
    </div>
    <blockquote
      cite="mid:538DA188.22283.254273@mike.dennison.ntlworld.com"
      type="cite">
      <pre wrap="">I presume this has been discussed before and I missed it.

What is the origin of the quite strong, wide RTTY-like signal on 
474.0kHz? It appears to be commercial as it is on continuously, and 
it comes up after dark every day.

For a while I presumed this was a funny on my receiver, but it 
appeared on another receiver with different architecture, and also on 
DK7FC's grabber. 

Mike, G3XDV
==========

</pre>
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