Message-ID: <000701c360e6$157157c0$3704210a@Hugh>
From: "Hugh M0WYE" <m0wye@thersgb.net>
To: rsgb_lf_group@blacksheep.org
References: <000e01c360e2$114c6300$6507a8c0@Main>
Date: Tue, 12 Aug 2003 16:21:03 +0100
MIME-Version: 1.0
Subject: LF: Re: BBC R4 LW "Frequency Standard"
Content-Type: text/plain; charset=iso-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Sender: <owner-rsgb_lf_group@blacksheep.org>
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

Hi Alan, Group,
Interesting article about BBC R4 LW.

Does the fact that there are multiple transmitters on this frequency have
any bearing on those who might use the 198kHz signal as a propagation
indicator outside of the UK ?

Presumably the interference pattern ("mush area") extends way beyond our
shores, and someone monitoring, say in the 'States might receive a weak
signal, not because there was no propagation, but because the two
transmitters happened to be in cancellation.

I assume the signals that we might use for reference, such as DCF39, have
only one source.

73
Hugh M0WYE

----- Original Message -----
From: "Alan Melia" <Alan.Melia@btinternet.com>
To: "LF-Group" <rsgb_lf_group@blacksheep.org>
Sent: Tuesday, August 12, 2003 3:57 PM
Subject: LF: BBC R4 LW "Frequency Standard"


> Hi All, I have posted the latest DTI Time & Frequency Club Newsletter to
my
> web site. It contains a short description of the frequency control of the
> BBC Radio 4 Longwave  transmitters on 198kHz, together with details of the
> phase modulation data service it also carries on the carrier. This will be
> interesting information for those of you who, like me, may have a 198kHz
> off-air standard in your workshop.
>
> Download of the 68kB pdf file is available from the link in the contents
> section on the index page.
> http://www.alan.melia.btinternet.co.uk/
>
> Cheers de Alan G3NYK
> alan.melia@btinternet.com
>
>
>
>