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From: "Lee Hudson" <hudsonville@btinternet.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Wed, 5 Sep 2012 18:48:54 +0100
Message-ID: <A093CA519A434279B8D64D7CC614B154@inspiron>
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Subject: RE: LF: MF acty
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Hi Stefan,

Setup here is fairly straight forward.
MiniWhip @ 5m height, 12m away from the house. RX is a Perseus.

QTH is on the southern edge of Harrogates residential area.=20

Noise level here is actually quite high. Most of which is radiated from =
the
house wiring. I've experimented with various ways of reducing this noise
over the last 4 years and the best seems to be isolating the main feeder =
at
both ends. The Miniwhip is powered via a solar charged battery and a =
good
earth at its base. The difference with and without the above is 20dB! =
This
makes the difference between hearing nothing, and almost everything HI!

Isolation transformers are 7 bifilar turns on a BN-73-202 core.

Since you are plotting consistent data, please ignore any reports from =
last
night as one of the isolators was in use on another project. Those =
received
during the daytime today and forward are OK.

I shall leave everything running so you can gather as much data as you =
need.

73,
Lee M0LMH.


-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Stefan =
Sch=E4fer
Sent: 05 September 2012 16:38
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: MF acty


Am 05.09.2012 17:19, schrieb Stefan Sch=E4fer:
> [...]but as soon as the sunrise comes, no signals are detected in the=20
> UK while the levels are 25 dB above the decode limit in the night.
Ehm, no, i've concentrated to much on the plot of G0KTN while writing=20
that. M0LMH even get's daytime decodes on the lower limit, maybe having=20
a somehow better RX-system+location(?)...

73, Stefan