Yes Alberto, it sounds like the Luxembourg effect.
I have a heard a similar effect many times on DCF39's carrier. The high
tones of the modulation are attenuated, probably because of some
"thermal inertia" in the electron stuff up there.
73
Johan SM6LKM
----
Alberto di Bene wrote:
> LF group,
>
> tuning at 128.930 kHz, the frequency of the German power utility
> station, in USB mode,
> I can hear what is possible to listen to in this 30 sec. MP3 file :
>
> http://www.sdradio.eu/audio/luxmbrg.mp3
>
> Is this what is called the Luxembourg effect ? I hear a mix of various
> broadcasting stations
> in the intervals between the data streams. I used the mini-whip and
> Perseus, and strongly doubt
> that one of these components can be the cause of what otherwise could be
> attributed to intermodulation.
> Or, saying it better, it *is* intermodulation, but the responsible is
> the ionosphere.
>
> Am I right ? Is that the (in)famous Luxembourg effect ? Or there is
> another reason for that ?
>
> TNX
>
> 73 Alberto I2PHD
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