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From: Lubos OK2BVG <bvgbob@hotmail.com>
To: _RSGB_LF <rsgb_lf_group@blacksheep.org>
Date: Mon, 24 Sep 2012 06:58:34 +0200
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Subject: RE: LF: Weak 'nighttime' carrier on 472.5 kHz ?
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Hello Wolf=2C group!Yes=2C I can see the signal as well. Similar signals ar=
e on 472=2C000 and 471=2C692kHz. I think=2C the are from distant TXs=2C but=
 I don=B4t know their ID. I can see the signals on both my receiving statio=
ns=2C they are 2km distant  each to other. If the conditions are very well=
=2C I can see and listen to a second harm from NDB "SA" on 472=2C460kHz (47=
4=2C500-(2x1=2C020)). But it don=B4t disturbe me=2C becouse it is only a po=
or signal=2C of course.   73!
Lubos=2C OK2BVG

*******************************************
> Date: Sun=2C 23 Sep 2012 21:32:47 +0200
> From: dl4yhf@freenet.de
> To: rsgb_lf_group@blacksheep.org=3B rsgb_lf_group@yahoogroups.co.uk
> Subject: LF: Weak 'nighttime' carrier on 472.5 kHz ?
>=20
> Dear group=2C
> Do others hear (or see) a continous carrier on 472.5 kHz as well ?
> I first thought it was 'local' but since it's only there in the=20
> nighttime=2C and even suffers from QSB like the 'wanted' signals it must=
=20
> be from a distant transmitter. Don't think it's an intermod product in=20
> the receiver=2C because the signal is audible with an SDR-IQ and a Perseu=
s=20
> as well - not just with the old IC706 which I use at DF0WD for reception=
=20
> on MF.
>=20
> If this frequency is audible / visible in other parts of Europe as well=
=2C=20
> we may have to move the de-facto CW 'calling frequency' a bit... 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').
>=20
> 73=2C
>    Wolf DL4YHF / DF0WD
>    JO42FD .
>=20
>=20
 		 	   		  =

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Hello Wolf=2C group!<div>Yes=2C I can see the signal as well. Similar signa=
ls are on 472=2C000 and 471=2C692kHz. I think=2C the are from distant TXs=
=2C but I don=B4t know their ID. I can see the signals on both my receiving=
 stations=2C they are 2km distant &nbsp=3Beach to other.&nbsp=3B</div><div>=
If the conditions are very well=2C I can see and listen to a second harm fr=
om NDB "SA" on 472=2C460kHz (474=2C500-(2x1=2C020)). But it don=B4t disturb=
e me=2C becouse it is only a poor signal=2C of course. &nbsp=3B&nbsp=3B</di=
v><div>73!</div><div><br></div><div>Lubos=2C OK2BVG<br><br>****************=
***************************</div><div><br><div><div id=3D"SkyDrivePlacehold=
er"></div>&gt=3B Date: Sun=2C 23 Sep 2012 21:32:47 +0200<br>&gt=3B From: dl=
4yhf@freenet.de<br>&gt=3B To: rsgb_lf_group@blacksheep.org=3B rsgb_lf_group=
@yahoogroups.co.uk<br>&gt=3B Subject: LF: Weak 'nighttime' carrier on 472.5=
 kHz ?<br>&gt=3B <br>&gt=3B Dear group=2C<br>&gt=3B Do others hear (or see)=
 a continous carrier on 472.5 kHz as well ?<br>&gt=3B I first thought it wa=
s 'local' but since it's only there in the <br>&gt=3B nighttime=2C and even=
 suffers from QSB like the 'wanted' signals it must <br>&gt=3B be from a di=
stant transmitter. Don't think it's an intermod product in <br>&gt=3B the r=
eceiver=2C because the signal is audible with an SDR-IQ and a Perseus <br>&=
gt=3B as well - not just with the old IC706 which I use at DF0WD for recept=
ion <br>&gt=3B on MF.<br>&gt=3B <br>&gt=3B If this frequency is audible / v=
isible in other parts of Europe as well=2C <br>&gt=3B we may have to move t=
he de-facto CW 'calling frequency' a bit... maybe <br>&gt=3B by 50 Hz or so=
 which makes it easy to tell an answering call from this <br>&gt=3B carrier=
 signal (which sometimes sounds like Morse but in a spectrogram <br>&gt=3B =
one can see that it never disappears 'completely').<br>&gt=3B <br>&gt=3B 73=
=2C<br>&gt=3B    Wolf DL4YHF / DF0WD<br>&gt=3B    JO42FD .<br>&gt=3B <br>&g=
t=3B <br></div></div> 		 	   		  </div></body>
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