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Date: Tue, 2 Nov 2010 10:03:36 -0400
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From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: The Wideband Noise
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Hello the list,
=A0=A0 The International Maritime Organization (IMO) is primarily a trade
group but does have standing on these issues. The IMO doesn't deploy
anything itself, what it does do is lobby governments to deploy these
systems. If the ARRL had better lobbyists they would take then on
directly, rather the strategy seems to be "we'll take any crumbs that
fall off the table and be grateful for it".
I find it interesting that the IMO let the MF spectrum lie dormant for
decades only to rediscover an interest in it the moment someone else
looked at using the spectrum!

--
73 Warren K2ORS
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XGJ
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WD2XSH/23
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XEB/2
=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 WE2XGR/1

On Tue, Nov 2, 2010 at 9:28 AM, Alan Melia <alan.melia@btinternet.com> wro=
te:
>
> Whoa hardly an intrusion we are not a primary user we have to take what
> interference they give. Some seem to forget this is not an amateur band=
 it
> is commercial spectrum and we have an experimental permit. Also the nois=
e
> increase showed on your plot is minimal ~1dB .....speclab is extermenly
> sensitive....what you are showing would probably be regarded as
> insignificant.
>
> I think this may be the French taking their normal stance of not wanting=
 to
> rely on US satellites and systems and trying to mollify
> redundancy-threatened radio engineers :-)) =A0cf =A0Loran-C. :
>
> Alan
>
> ----- Original Message -----
> From: "Gary - G4WGT" <g4wgt@tiscali.co.uk>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Tuesday, November 02, 2010 11:50 AM
> Subject: Re: LF: The Wideband Noise
>
>
> > Hi John & LF,
> >
> > The screen shot attached shows an average strength of the 498 to 502kH=
z
> > signal here in NW England (IO83QO). QSB has an effect on the signal wh=
ich
> > 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> wro=
te:
> >
> > > 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 Col=
in
> > > would like to gather some information about where it is being receiv=
ed.
> > >
> > > 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
> > >
> > >
> >
>
>