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Date: Wed, 4 Nov 2009 22:48:19 +0000
Message-ID: <9afca2640911041448h40136478tc654624899dc42da@mail.gmail.com>
From: Roger Lapthorn <rogerlapthorn@gmail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Re: 500kHz attenuation graphs?
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Thanks Ian. At first glance this looks most useful.

73s
Roger G3XBM

2009/11/4 Ian Marsh <i.marsh@virgin.net>

> Wonder if this would help. It's a free BBC document on the estimation of
> LF/MF broadcast service areas. There are graphs for the 200 KHz to 1500 KHz
> region for differing ground conductivities. It's available at:
>
> http://downloads.bbc.co.uk/rd/pubs/reports/1975-01.pdf
>
> Older editions of the NAB Engineering Handbook at least had graphs for the
> MW broadcast band if I remember correctly but someone seems to have lifted
> our work copy and the latest edition is priced at $199.
>
> Cheers
>
> Ian / G4EXD
>
>
>
>


-- 
-------------------------------------------------------------
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
G3XBM    GQRP 1678      ISWL G11088

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Thanks Ian. At first glance this looks most useful.<br><br>73s<br>Roger G3=
XBM<br><br><div class=3D"gmail_quote">2009/11/4 Ian Marsh <span dir=3D"ltr=
">&lt;<a href=3D"mailto:i.marsh@virgin.net">i.marsh@virgin.net</a>&gt;</sp=
an><br>
<blockquote class=3D"gmail_quote" style=3D"border-left: 1px solid rgb(204,=
 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Wonder if this=
 would help. It&#39;s a free BBC document on the estimation of LF/MF broad=
cast service areas. There are graphs for the 200 KHz to 1500 KHz region fo=
r differing ground conductivities. It&#39;s available at:<br>

<br>
<a href=3D"http://downloads.bbc.co.uk/rd/pubs/reports/1975-01.pdf" target=
=3D"_blank">http://downloads.bbc.co.uk/rd/pubs/reports/1975-01.pdf</a><br>
<br>
Older editions of the NAB Engineering Handbook at least had graphs for the=
 MW broadcast band if I remember correctly but someone seems to have lifte=
d our work copy and the latest edition is priced at $199.<br>
<br>
Cheers<br>
<br>
Ian / G4EXD<br>
<br>
<br>
<br>
</blockquote></div><br><br clear=3D"all"><br>-- <br>----------------------=
---------------------------------------<br><a href=3D"http://g3xbm-qrp.blo=
gspot.com/">http://g3xbm-qrp.blogspot.com/</a><br><a href=3D"http://www.g3=
xbm.co.uk">http://www.g3xbm.co.uk</a><br>
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088<br>

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