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Message-ID: <003901c79a4a$735ed280$0300a8c0@lark>
From: "Alan Melia" <alan.melia@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
References: <005101c799f0$c5e68c50$0b01a8c0@acer5gi5q0ubzj>
Date: Sat, 19 May 2007 20:06:28 +0100
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Subject: LF: Re: RE: Re: Rugby - Anthorn
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Status: O

Their measurements show the field strength is above the spec. but I suspect
this does not help if you were relying on a much stronger signal that NPL
requested from from Rugby to overcome screening or local noises. I am quite
surprised in a way how well it does work. I suppose 60kHz is very close to 4
times 15.625kHz for a simple receiver.
The other poblem is a lot of modern wide screen TVs have SMPSUs that run in
the 30kHz range and emit quite a big signal from the aerial coax braid.

Cheers de Alan G3NYK

----- Original Message -----
From: John W Gould <jwgould@iee.org.uk>
To: <rsgb_lf_group@blacksheep.org>
Sent: 19 May 2007 09:36
Subject: LF: RE: Re: Rugby - Anthorn


I didn't take much interest in this thread until I realised that my MSF
clock was free-wheeling.  I've had to find a new position and orientation
for it in order for it to lock onto the Anthorn signal.  This seems to be
rather difficult and intermittent.  So much for the claim of a good coverage
across the UK.

My QTH is about 30 miles south of Rugby (so no trouble there) but I guess
180 - 200 miles from Anthorn.  I can see a "dissaffected from Newport
Pagnell" letter being drafted before too long to the operator.

73 John, G3WKL

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Alberto di Bene
Sent: 17 May 2007 18:03
To: LF Mailing List
Cc: Alan Melia
Subject: LF: Re: Rugby - Anthorn


Hi Alan,

  I have measured the response of the S-meter of my R-75 at 60 kHz, using a
W&G level generator and a Hatfield
attenuator I had bought on eBay some time ago.

At 60 kHz, you need a signal of -67 dBm to have an indication of S9 on the
receiver. To bring it down to S3, I had to
insert using the Hatfield attenuator 17 dB of attenuation. So much for the
linearity of S-meters...

So, for what this test is worth, apparently at my location Anthorn seems to
be about 17 dB weaker than Rugby. The test
is not much scientific, as I didn't take note in the past of the time of the
day when I took the S9 reading, nor of its
repeatability, but as a ballpark indication maybe it can say something.

73  Alberto  I2PHD