Message-ID: <62ED4C9DE7CA46E19AB50CA71E84C078@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <fc7eccec0902010926o51fc1d32i18c4ea72e6706b2e@mail.gmail.com> <1C74AC0CBE924A0FB6DC4ADC1B7072CF@JimPC>
In-Reply-To: <1C74AC0CBE924A0FB6DC4ADC1B7072CF@JimPC>
Date: Sun, 1 Feb 2009 19:26:25 -0000
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Subject: Re: LF: Re: 'JNT WSPR
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Jim

Sorry to  read that , I have the old bbc radio merseyside tx about 1 miles 
from me  .. that was bad enough .. till  it started to  send 3 or 4 mw 
signals  . now its all over the place   .. roll on digital  bc ..  hopefully 
it will be turned off  ...   be like waking up on that  wonderful day and 
finding the decca signal had gone from 1.9 mhz  ... ...

G ..

--------------------------------------------------
From: "James Moritz" <james.moritz@btopenworld.com>
Sent: Sunday, February 01, 2009 6:50 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: LF: Re: 'JNT WSPR

>
> Dear Andy, LF Group,
>
> Should be better now - I have been playing with antennas due to the 
> problem
> that arose yesterday with the increased noise levels. Incidentally, I just
> saw your frequency jump from 503870 to 503885 Hz in the middle of the 1830
> transmission, but still gave 0dB and +3dB SNRs - on two frequencies!
>
> After going out and about with a loop and portable RX, I am now pretty
> certain that the QRM is being radiated from the Brookmans Park transmitter
> site. I am not entirely certain, but there seems to be some correlation
> between the noise and the BBC R5 909kHz transmission audio, the antenna of
> which is about 500m from here. This was also the case before, but the QRM
> level has risen by about 20dB in the last day or so.
>
> As an experiment, I have lashed up an EWE-like antenna, and with suitable
> tweaking this gives about 20dB of unidirectional null, which has brought 
> me
> back to more or less where I was before, at least for signals coming from 
> a
> westerly direction. It is too big to be a permanent fixture, and also
> interacts with the TX antenna. But I think similar or better results will 
> be
> achievable by phasing a vertical antenna against the existing loops here.
>
> Cheers, Jim Moritz
> 73 de M0BMU
>
>
> ----- Original Message ----- 
> From: "Andy Talbot" <andy.g4jnt@googlemail.com>
> To: <rsgb_lf_group@blacksheep.org>
> Sent: Sunday, February 01, 2009 5:26 PM
> Subject: LF: 'JNT WSPR
>
>
>> Why are you reporting such a low SNR, Jim ?
>
>
>



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