> Date: Sun, 23 Sep 2012 21:32:47 +0200
> From:
[email protected]> To:
[email protected];
[email protected]> 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 .
>
>
