Date: Sun, 23 Sep 2012 22:14:14 +0200
From: uwe-jannsen@kabelmail.de
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Weak 'nighttime' carrier on 472.5 kHz ?
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Yes, Wolf,

 it is visible, 3dB max above noise level=2E fading down to nill=2E

 GL
 Uwe/dj8wx=20

  Von: rsgb_lf_group@blacksheep=2Eorg
 Gesendet: 23=2E09=2E2012 21:32
 An: rsgb_lf_group@blacksheep=2Eorg;rsgb_lf_group@yahoogroups=2Eco=2Euk
 Betreff: LF: Weak 'nighttime' carrier on 472=2E5 kHz ?

 Dear group,
 Do others hear (or see) a continous carrier on 472=2E5 kHz as well ?
 I first thought it was 'local' but since it's only there in the=20
 nighttime, and even suffers from QSB like the 'wanted' signals it must=
=20
 be from a distant transmitter=2E Don't think it's an intermod product =
in=20
 the receiver, because the signal is audible with an SDR-IQ and a Perse=
us=20
 as well - not just with the old IC706 which I use at DF0WD for recepti=
on=20
 on MF=2E

 If this frequency is audible / visible in other parts of Europe as wel=
l,=20
 we may have to move the de-facto CW 'calling frequency' a bit=2E=2E=2E=
 maybe=20
 by 50 Hz or so which makes it easy to tell an answering call from this=
=20
 carrier signal (which sometimes sounds like Morse but in a spectrogram=
=20
 one can see that it never disappears 'completely')=2E

 73,
 Wolf DL4YHF / DF0WD
 JO42FD =2E
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<div style=3D"margin: 5px;padding:0;font-family: Arial; font-size: 13px=
;">Yes, Wolf,<br />
<br />
it is visible, 3dB max above noise level=2E fading down to nill=2E<br /=
>
<br />
GL<br />
Uwe/dj8wx <br />
<hr />
<br />
<hr />
Von: rsgb_lf_group@blacksheep=2Eorg<br />
Gesendet: 23=2E09=2E2012 21:32<br />
An: rsgb_lf_group@blacksheep=2Eorg;rsgb_lf_group@yahoogroups=2Eco=2Euk<=
br />
Betreff: LF: Weak 'nighttime' carrier on 472=2E5 kHz ?<br />
<hr />
<br />
Dear group,<br />
Do others hear (or see) a continous carrier on 472=2E5 kHz as well ?<br=
 />
I first thought it was 'local' but since it's only there in the <br />
nighttime, and even suffers from QSB like the 'wanted' signals it must =
<br />
be from a distant transmitter=2E Don't think it's an intermod product i=
n <br />
the receiver, because the signal is audible with an SDR-IQ and a Perseu=
s <br />
as well - not just with the old IC706 which I use at DF0WD for receptio=
n <br />
on MF=2E<br />
<br />
If this frequency is audible / visible in other parts of Europe as well=
, <br />
we may have to move the de-facto CW 'calling frequency' a bit=2E=2E=2E =
maybe <br />
by 50 Hz or so which makes it easy to tell an answering call from this =
<br />
carrier signal (which sometimes sounds like Morse but in a spectrogram =
<br />
one can see that it never disappears 'completely')=2E<br />
<br />
73,<br />
Wolf DL4YHF / DF0WD<br />
JO42FD =2E<br />
<br /></div>
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