Yes , But im sure we can engineer a way round it ..
Q what is
the 'wording' of the data regulations ?
--- In
[email protected],
"mal hamilton" <g3kevmal@...> wrote:
>
> Graham
>
This particular piece of spectrum was NOT a good choice for radio amateur
use. Like Tracy said the majority of the NDB'S are audible in the UK and
some very loud during the dark hours.
> It is only really suitable
for CW qso mode where the operator can dive in/out of vacant slots at the
time.
> For Opera or other data modes it will be difficult where a
SLOT has to be specified because there are quite dramatic propagation
changes taking place especially in the dark hours and you could well end up
on top of a NDB or several.
> The same applies on 160 metres where
band condx change all the time, fortunately there are no NDB'S to contend
with.
> It is not surprising commercial operators did not see this
part of the spectrum as useful except all NDB'S QRT.
> NDB'S are still
a useful nav aid for the Aeronautical service es others so I cannot see them
switching off.
> G3KEV
>
> ----- Original Message -----
> From: graham787
> To:
[email protected]
> Sent: Friday, June 15, 2012 2:38 PM
> Subject:
[rsgb_lf_group] Re: Band Planning for 472 Khz Band ?
>
>
>
> This is going to be a nightmare, more like a downhill
slalom course than a band allocation
>
> Has anyone a graphic
of the band and beacon allocations what shows where the gaps are ?
>
> G..
>
> --- In
[email protected],
"Mike Dennison" <mike.dennison@> wrote:
> >
> >
Guard bands for all 27 listed NDBs would present a problem as the MCW
> > receivers would be at least 2.5kHz wide. Fortunately, any
> > interference from amateurs is likely to be extremely local.
Our small
> > signal working is likely to suffer more QRM =from=
the NDBs than to
> > them.
> >
> > Mike,
G3XDV
> > ==========
> >
> > > Twenty-seven
NDBs have been logged in Europe between 472-479kHz.
> > > Twelve
of those have been logged from the UK.
> > > The NDB database on
the Classaxe web site would provide detailed
> > > information
on frequencies which should be avoided. It should be borne
> > >
in mind that the NDBs use A2 mode with a mix of approx 400Hz and
>
> > 1020Hz modulation, so there are a good number of specific slots to
be
> > > wary of.
> > >
> > >
http://www.classaxe.com/dx/ndb/reu/> > >
> > > Perhaps some consideration should be given to setting up
some form of
> > > guard bands/frequencies in order to avoid any
problems with NDBs?
> > >
> > > 73s Tracey
G5VU
>
>
>
