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Date: Thu, 6 May 2010 14:23:41 -0400
Message-ID: <j2t57a24ca71005061123h45b3a829pec579ac498b3e76@mail.gmail.com>
From: Warren Ziegler <wd2xgj@gmail.com>
To: rsgb_lf_group@blacksheep.org
DomainKey-Status: good (testing) 
Subject: LF: =?windows-1252?Q?Re=3A_LF=3A_500_Permit_emission=92s_bandwidth=3F_EU_and_Gl?=
	=?windows-1252?Q?obal_=3F=3F?=
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Mal,

     In the US we have very few operators spread out over a large
geographic area (including ops in Alaska and Hawaii) as well as up to
20kHz available to us. To date QRM is a non-issue.

--=20
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1


On Thu, May 6, 2010 at 1:43 PM, mal hamilton <g3kevmal@talktalk.net> wrote=
:
> The majority of CW operators on LF/FMF will not exceed 100 hz bandwidth.
> 99.9% are sending at speeds of about 10wpm or less.
> 100 hz is about right on LF/MF where the total bandwidth of the=A0permit=
ted
> allocation is about 3 khz
> also, as far as data modes are concerned all that is happening on LF/MF=
 is
> bodging data modes meant for vhf/uhf applications and making a mess, ie=
 the
> Appliance Operator approach
>
>
> g3kev
>
>
>
> ----- Original Message -----
> From: Rik Strobbe
> To: rsgb_lf_group@blacksheep.org
> Sent: Thursday, May 06, 2010 1:19 PM
> Subject: RE: LF: 500 Permit emission=92s bandwidth? EU and Global ??
> Graham,
>
> the document that gives us access to 500kHz says 100Hz bandwidth, but do=
es
> not say how many dB's the signal has to be attenuated at these limits.
>
> 73, Rik=A0 ON7YD - OR7T
>
> ________________________________
> Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.=
org]
> namens Graham [g8fzk@g8fzk.fsnet.co.uk]
> Verzonden: donderdag 6 mei 2010 13:30
> Aan: rsgb_lf_group@blacksheep.org
> Onderwerp: Re: LF: 500 Permit emission=92s bandwidth? EU and Global ??
>
> Ok Many=A0 thanks'=A0 for the=A0 reply's
>
> From that .... next is :-
>
> From the=A0=A0data, I assume that=A0 100=A0 Hz is the=A0 common=A0 limit=
ing factor for
> a=A0 narrow=A0 band=A0 data transmission=A0 that=A0 could be used by all=
=A0 who
> 'wanted'=A0 to=A0 use it=A0 ?..(noted on the=A0 cw keying=A0 speed=A0 ~=
 BW)
>
> So if a=A0 value of=A0 100 Hz is=A0 specified, what=A0 is the=A0 'presum=
ed'=A0 roll-off
> of the power in the said bands=A0?, assuming that=A0 the=A0 original=A0=
 concept was
> based on CW operation , which by=A0 definition 'has to' generate sideban=
ds=A0,
> there must be an assumed=A0 tolerance ?
>
> Q=A0 would the deployment=A0 of a=A0 system that=A0 could=A0=A0 defined=
 as =A0 125 hz
> bandwidth=A0 ie=A0100 Hz with =A0 +/-=A0 12.5 Hz=A0 overspill , cause=A0=
 a=A0 technical
> breach=A0 of the=A0 regulations=A0 or=A0 be=A0 viewed as=A0 occupying=A0=
 the=A0 'allocated'
> bandwidth=A0 for a=A0 telegraphy transmission ? ,
>
> Taking that=A0 spectral measurements in the=A0 10=A0 Hz=A0 region are=A0=
 perhaps
> starting to=A0=A0test=A0 even the=A0 best equipment, the=A0 area=A0 is=
 perhaps a
> little=A0 empiric ?
>
> I use the=A0 word=A0 telegraphy, purposely to view/observe the=A0 situat=
ion
> interims of the=A0 licence=A0 conditions=A0and not on the=A0 basis=A0 of=
=A0 'mode' which
> like=A0 Liverpool=A0 and Everton have there=A0 own sub cultures =A0but=
 are still
> football=A0 teams ..
>
> Thanks
>
> Graham
> G0NBD
>
>
>
>
> From: Graham
> Sent: Wednesday, May 05, 2010 10:39 PM
> To: rsgb_lf_group@blacksheep.org
> Subject: LF: 500 Permit emission=92s bandwidth? EU and Global ??
>
> 500 Permit emission=92s bandwidth?
>
>
>
> Can any one indicated=A0 what is the=A0 permitted =A0=91telegraphy=92=A0=
 bandwidth=A0 of
> the various =91new=92 500KHz =A0licences=A0 or=A0 special=A0 permits iss=
ued round the
> EU and now the=A0 rest of the=A0 Globe ?
>
>
>
> I have the impression that 100 Hz is the maximum =91telegraphy=92 transm=
ission
> bandwidth, in some cases, eg , Belgium at 100 Hz . =A0Others appear to=
 be some
> what wider or not defined ?.
>
>
>
> Norway=A0 is CW only=A0 ? what is the=A0 Dutch=A0 allocation ? Southern=
 Ireland ?
> ... etc
>
>
>
> Are=A0 Beacons defined by=A0 mode or=A0 bandwidth =A0?
>
>
>
> Tnx =96 Graham
>
> G0NBD
>
>
>
> (I use the=A0 word=A0 =91telegraphy=92 as defined by the=A0 ITU R V.662-=
3 , =A0please
> no=A0 reference to key clicks ! )
>
>
>
>