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Date: Mon, 24 Sep 2012 19:16:42 +0200
From: wolf_dl4yhf <dl4yhf@freenet.de>
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Subject: Re: LF: Weak 'nighttime' carrier on 472.5 kHz ?
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Hi Lubos and all,

Thanks for checking - so we can be sure this is not a receiver problem 
on any side.
Your signal is much stronger than this QRM most of the evening, but in 
some occasions it's irritating to hear a tone at the QSO partner's 
frequency - especially when there was QSB and one cannot be sure if the 
over is really 'over'.

I will check 472.000 and 471.692 kHz too, but at the moment the WX is 
not good (in fact, it's "lousy") for any activities at the club station. 
We had temperatures just above 0°C here last weekend, and +17°C with 
lots of rain now.

Oh btw, Finbar EI0CF seems to be back on MF, listening on 472.x kHz in 
late evenings. IIRC, he usually transmitted around 501 kHz during our 
last QSOs so it may be worth listening for a reply around that 
frequency, and announce this in own CQ calls.

All the best,
    Wolf .

Am 24.09.2012 06:58, schrieb Lubos OK2BVG:
> Hello Wolf, group!
> Yes, I can see the signal as well. Similar signals are on 472,000 and 
> 471,692kHz. I think, the are from distant TXs, but I don´t know their 
> ID. I can see the signals on both my receiving stations, they are 2km 
> distant  each to other.
> If the conditions are very well, I can see and listen to a second harm 
> from NDB "SA" on 472,460kHz (474,500-(2x1,020)). But it don´t disturbe 
> me, becouse it is only a poor signal, of course.
> 73!
>
> Lubos, OK2BVG
>
> *******************************************
>
> > Date: Sun, 23 Sep 2012 21:32:47 +0200
> > From: dl4yhf@freenet.de
> > To: rsgb_lf_group@blacksheep.org; rsgb_lf_group@yahoogroups.co.uk
> > Subject: LF: Weak 'nighttime' carrier on 472.5 kHz ?
> >
> > Dear group,
> > 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
> > nighttime, and even suffers from QSB like the 'wanted' signals it must
> > be from a distant transmitter. Don't think it's an intermod product in
> > the receiver, because the signal is audible with an SDR-IQ and a 
> Perseus
> > as well - not just with the old IC706 which I use at DF0WD for 
> reception
> > on MF.
> >
> > If this frequency is audible / visible in other parts of Europe as 
> well,
> > we may have to move the de-facto CW 'calling frequency' a bit... maybe
> > by 50 Hz or so which makes it easy to tell an answering call from this
> > carrier signal (which sometimes sounds like Morse but in a spectrogram
> > one can see that it never disappears 'completely').
> >
> > 73,
> > Wolf DL4YHF / DF0WD
> > JO42FD .
> >
> >


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    <div class="moz-cite-prefix">Hi Lubos and all,<br>
      <br>
      Thanks for checking - so we can be sure this is not a receiver
      problem on any side.<br>
      Your signal is much stronger than this QRM most of the evening,
      but in some occasions it's irritating to hear a tone at the QSO
      partner's frequency - especially when there was QSB and one cannot
      be sure if the over is really 'over'.<br>
      <br>
      I will check 472.000 and 471.692 kHz too, but at the moment the WX
      is not good (in fact, it's "lousy") for any activities at the club
      station. We had temperatures just above 0°C here last weekend, and
      +17°C with lots of rain now.<br>
      <br>
      Oh btw, Finbar EI0CF seems to be back on MF, listening on 472.x
      kHz in late evenings. IIRC, he usually transmitted around 501 kHz
      during our last QSOs so it may be worth listening for a reply
      around that frequency, and announce this in own CQ calls.<br>
      <br>
      All the best,<br>
         Wolf .<br>
      <br>
      Am 24.09.2012 06:58, schrieb Lubos OK2BVG:<br>
    </div>
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      <div dir="ltr">
        Hello Wolf, group!
        <div>Yes, I can see the signal as well. Similar signals are on
          472,000 and 471,692kHz. I think, the are from distant TXs, but
          I don´t know their ID. I can see the signals on both my
          receiving stations, they are 2km distant  each to other. </div>
        <div>If the conditions are very well, I can see and listen to a
          second harm from NDB "SA" on 472,460kHz (474,500-(2x1,020)).
          But it don´t disturbe me, becouse it is only a poor signal, of
          course.   </div>
        <div>73!</div>
        <div><br>
        </div>
        <div>Lubos, OK2BVG<br>
          <br>
          *******************************************</div>
        <div><br>
          <div>&gt; Date: Sun, 23 Sep 2012 21:32:47 +0200<br>
            &gt; From: <a class="moz-txt-link-abbreviated" href="mailto:dl4yhf@freenet.de">dl4yhf@freenet.de</a><br>
            &gt; To: <a class="moz-txt-link-abbreviated" href="mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</a>;
            <a class="moz-txt-link-abbreviated" href="mailto:rsgb_lf_group@yahoogroups.co.uk">rsgb_lf_group@yahoogroups.co.uk</a><br>
            &gt; Subject: LF: Weak 'nighttime' carrier on 472.5 kHz ?<br>
            &gt; <br>
            &gt; Dear group,<br>
            &gt; Do others hear (or see) a continous carrier on 472.5
            kHz as well ?<br>
            &gt; I first thought it was 'local' but since it's only
            there in the <br>
            &gt; nighttime, and even suffers from QSB like the 'wanted'
            signals it must <br>
            &gt; be from a distant transmitter. Don't think it's an
            intermod product in <br>
            &gt; the receiver, because the signal is audible with an
            SDR-IQ and a Perseus <br>
            &gt; as well - not just with the old IC706 which I use at
            DF0WD for reception <br>
            &gt; on MF.<br>
            &gt; <br>
            &gt; If this frequency is audible / visible in other parts
            of Europe as well, <br>
            &gt; we may have to move the de-facto CW 'calling frequency'
            a bit... maybe <br>
            &gt; by 50 Hz or so which makes it easy to tell an answering
            call from this <br>
            &gt; carrier signal (which sometimes sounds like Morse but
            in a spectrogram <br>
            &gt; one can see that it never disappears 'completely').<br>
            &gt; <br>
            &gt; 73,<br>
            &gt; Wolf DL4YHF / DF0WD<br>
            &gt; JO42FD .<br>
            &gt; <br>
            &gt; <br>
          </div>
        </div>
      </div>
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