Envelope-to: dave@picks.force9.co.uk
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From: "hamilton mal" <g3kev.ham@virgin.net>
To: rsgb_lf_group@blacksheep.org
References: <E1DzVCP-0007v8-5a@post.thorcom.com>
Date: Thu, 4 Aug 2005 18:53:14 +0100
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Subject: LF: Re: Coping with Loran
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----- Original Message -----
From: "Dave Pick" <dave@picks.force9.co.uk>
To: <rsgb_lf_group@blacksheep.org>
Sent: Monday, August 01, 2005 8:58 AM
Subject: LF: Coping with Loran


>
> Dear all.
>
> In the next Radcom LF column would like to do a piece about the effect of
> Rugby Loran on UK stations.
> How much interference is there at your QTH?
> How are you coping with the QRM? Etc.
>
> All info welcome at g3yxm@wireless.org.uk
>
> Thanks.
>
> Dave G3YXM
Hi Dave.
Ref info that you require about the Rugby Loran.
Using my 80 metre loop opt direction East/West there is no trace of Loran
qrm.
Using my inv L vert system ie 4 inv L ants parallel each 120 ft vert and and
abt 400 ft horiz the qrm is severe and could be a problem even at this
distance, fortunately the LOOP nulls out this qrm completely and since most
acty of interest is from the E or W direction it is not a problem for me.
This loop is so good for rejection to the South that I often cannot see or
hear G stnn from this direction, especially the qrp acty in the South of
England. I have not done any serious measurements so far but a rough check
on 137 khz  indicates loran qrm lines about 30 db over the ambient noise
floor here using the vert anternna.
Hope this helps and I can understand your concern at your QTH where it might
render the LF band impossible to use.

73 de Mal/G3KEV

>
>
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