----- Original Message -----

From: Mike Dennison

To: [email protected]

Sent: Friday, June 15, 2012 1:39 PM

Subject: Re: [rsgb_lf_group] Band Planning for 472 Khz Band ?

 

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

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