Message-ID: <4CD0049A.6050903@o2.ie>
Date: Tue, 02 Nov 2010 12:31:22 +0000
From: Tony <ei8jk@o2.ie>
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To: rsgb_lf_group@blacksheep.org
References: <20101101233708.02b5f67d@opc1> <AANLkTi=chbDySSJR=D2_453gDhjwgxZ8D19xS=GOF5hE@mail.gmail.com>
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Subject: Re: LF: The Wideband Noise
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Hi Gary & LF

Looks like it might get worse as you can see from the rather ominous 
quote from Jan's link ...

Quote >>   IMO supports the future use of band 415 kHz -- 526.5 kHz for 
safety and security related systems,
recognizing that this band is allocated on a world-wide basis for the 
use by the maritime community.

Tony, EI8JK.


On 02/11/2010 11:50, Gary - G4WGT wrote:
> Hi John & LF,
>
> The screen shot attached shows an average strength of the 498 to 
> 502kHz signal here in NW England (IO83QO). QSB has an effect on the 
> signal which continues throughout the darkness periods.
>
> This intrusion into the UK 500kHz band makes reception difficult.
>
> 73,
>
> Gary - G4WGT.
>
>
>
> On 1 November 2010 23:37, John P-G <gm4slv@sighthound.demon.co.uk 
> <mailto:gm4slv@sighthound.demon.co.uk>> wrote:
>
>     Hello,
>
>     I've had some correspondence with John G3WKL and Colin G3PSM about the
>     new "commercial" wideband data noise that occupies 498-502kHz
>
>     It seems to be a test of an impending data system for marine use.
>
>     Colin would like some information about where, and when, it can be
>     heard or otherwise detected. It appears to be being driven by the
>     French.
>
>     Forthe record I can hear it here in Shetland. It faded up tonight at
>     approx 1615 UTC and is audible and visible on a waterfall display.
>
>     I haven't been in a position to DF it, but in the first instance Colin
>     would like to gather some information about where it is being
>     received.
>
>     I can collate the information for him if anyone who is affected by, or
>     can simply detect, this noise/data signal could give details either
>     direct, or via the LF group. I know a lot of discussion has been had
>     already, but a quick note now could be useful, as there is a meeting
>     soon to discuss this, and other aspects of WRC2012.
>
>     Cheers,
>
>     John
>     GM4SLV
>
>


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    Hi Gary &amp; LF<br>
    <br>
    Looks like it might get worse as you can see from the rather ominous
    quote from Jan's link ...<br>
    <br>
    Quote &gt;&gt; &nbsp; IMO supports the future use of band 415 kHz &#8211; 526.5
    kHz for safety and security related systems,<br>
    recognizing that this band is allocated on a world-wide basis for
    the use by the maritime community.<br>
    <br>
    Tony, EI8JK.<br>
    <br>
    <br>
    On 02/11/2010 11:50, Gary - G4WGT wrote:
    <blockquote        cite="mid:AANLkTi=chbDySSJR=D2_453gDhjwgxZ8D19xS=GOF5hE@mail.gmail.com"        type="cite">Hi John &amp; LF,
      <div><br>
      </div>
      <div>The screen shot attached shows an average strength of the 498
        to 502kHz signal here in NW England (IO83QO). QSB has an effect
        on the signal which continues throughout the darkness periods.</div>
      <div><br>
      </div>
      <div>This intrusion into the UK 500kHz band makes reception
        difficult.</div>
      <div><br>
      </div>
      <div>73,</div>
      <div><br>
      </div>
      <div>Gary - G4WGT.</div>
      <div><br>
      </div>
      <div><br>
        <br>
        <div class="gmail_quote">On 1 November 2010 23:37, John P-G <span              dir="ltr">&lt;<a moz-do-not-send="true"                href="mailto:gm4slv@sighthound.demon.co.uk">gm4slv@sighthound.demon.co.uk</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt              0.8ex; border-left: 1px solid rgb(204, 204, 204);              padding-left: 1ex;">Hello,<br>
            <br>
            I've had some correspondence with John G3WKL and Colin G3PSM
            about the<br>
            new "commercial" wideband data noise that occupies
            498-502kHz<br>
            <br>
            It seems to be a test of an impending data system for marine
            use.<br>
            <br>
            Colin would like some information about where, and when, it
            can be<br>
            heard or otherwise detected. It appears to be being driven
            by the<br>
            French.<br>
            <br>
            Forthe record I can hear it here in Shetland. It faded up
            tonight at<br>
            approx 1615 UTC and is audible and visible on a waterfall
            display.<br>
            <br>
            I haven't been in a position to DF it, but in the first
            instance Colin<br>
            would like to gather some information about where it is
            being received.<br>
            <br>
            I can collate the information for him if anyone who is
            affected by, or<br>
            can simply detect, this noise/data signal could give details
            either<br>
            direct, or via the LF group. I know a lot of discussion has
            been had<br>
            already, but a quick note now could be useful, as there is a
            meeting<br>
            soon to discuss this, and other aspects of WRC2012.<br>
            <br>
            Cheers,<br>
            <br>
            John<br>
            GM4SLV<br>
            <br>
          </blockquote>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
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