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From: "mal hamilton" <g3kevmal@talktalk.net>
To: <rsgb_lf_group@blacksheep.org>
References: <74845C11BC3444D79B63A207E428BDE0@lindavideo>  <C4EE404465AB4B2C89B9809DE06DD805@oem92799c6e374> <1205576556-1330352309-cardhu_decombobulator_blackberry.rim.net-124445598-@b27.c11.bise7.blackberry> <005701ccf561$cd9d4250$0401a8c0@xphd97xgq27nyf> <098856018E3A46AB96BA9F9FC6C8FFCD@JimPC> <58AD05C381A841E9B1C5A0FEDD3E3043@lindavideo>
Date: Tue, 28 Feb 2012 10:33:39 -0000
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Subject: LF: Re: RE: Re: NDBs & WRC-12 LF band allocation
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Ken
It could be tight at times especially for those with a good RX/Antenna
therefore the ability to hear a good many NDB'S and try to squeeze into a
vacant slot. Another problem for those with Ferrite rod and uProbe RX
antennas they will not hear a lot of these Beacons and therefore could well
be transmitting on top of them.
This was an unusual slot to pick for radio amateur use.
de mal/g3kev

----- Original Message -----
From: "Ken" <ken.h.wright@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, February 28, 2012 10:10 AM
Subject: LF: RE: Re: NDBs & WRC-12 LF band allocation


> Dear Jim, Mal, LF Group.
> All I was trying to say in my message was 'if we could hear say 10 or 12
> NDBs in the UK, would there be sufficient bandwidth left between each NDB
> for us to safely operate using whatever modes we are assigned' Sorry if I
> caused any confussion.
>
> 73s
>
> Ken
>
> M0KHW
>
> -----Original Message-----
> From: owner-rsgb_lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of James Moritz
> Sent: 28 February 2012 00:03
> To: rsgb_lf_group@blacksheep.org
> Subject: LF: Re: NDBs & WRC-12 LF band allocation
>
> Dear Mal, Ken, LF Group,
>
> G3KEV wrote:
> >The band should be licensed for CW operators only so that they could
> >recognize and read the CW  beacons and AVOID >them.
>
> One does not need to be a morse code expert to realise there is a strong
> signal repeating  the same dots and dashes 24 hours a day on a particular
> frequency. One just needs a little common sense...
>
> >Has OFCOM thought of this.  Neither should there be any amateur
unattended
> >BEACONS to jam the Primary user >Beacons even unintentionally.
>
> Whether the transmission is a "manual" QSO or automated, or if an NoV for
an
>
> unattended beacon was being applied for, the important thing for the
amateur
>
> is to be aware of nearby NDBs and avoid transmitting on their
frequencies -
> this is a matter of  observation and advance planning, not operating. If
a
> couple of amateurs are yakking away about the WX on a NDB frequency, in CW
> or any other mode, there is no way that the NDB will be able to break in
at
> the end of one over and say "excuse me chaps, but there are aircraft
trying
> to get a bearing on this frequency; would you mind QSYing - thank you so
> much"  ;-)
>
> Think about this from the Primary User's point of view - if someone
> navigating an aircraft sets their ADF receiver to a particular beacon
> frequency and hears an assortment of amateur-generated morse code mixed up
> with the beacon ID, this is likely to cause confusion or error. So there
is
> a strong argument for amateurs not to use morse code at all in this
> frequency range. It would be better to use totally different types of
> transmission that would not be confused with a NDB beacon signal.
>
> Cheers, Jim Moritz
> 73 de M0BMU
>
>
>
>