Hello Eberhard,
RR. And who is 'we'?
Once you found the source you may also find someone living close to it.
If the source makes QRM on other frequencies too, affecting broadcast
reception, then he could tell it the BNetzA. Probably they will ignore
it if you say that it's disturbing the 630m band.
It must be something that is able to radiate a decent power at MF. It
is barely audible here. So it can't be a compact structure.
Good luck.
73, Stefan
Am 15.02.2019 08:47, schrieb eberhardvwedelstaedt:
Hallo Stefan
The drifting signal whith center at 474,4kHz whith sidebands 50Hz
ist since 4 or 5 Years permanent 365/7/24.
I
think it is a advertising plant or a neon sign in the geographical
triangle hamburg kiel cuxhaven. we want
to make it more accurate in the spring.
73
Eberhard DL3ZID
Am 14.02.19 um 19:48 schrieb DK7FC:
Hello Eberhad,
Interesting. BTW there is a QRM source that is there since years,
almost every night, a drifting signal arround 474.3...474.5 kHz. I saw
it on your grabber as well, so i cannot be local!
You can see it right now, e.g. at http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_remote_RDF_Grabber.html
It is only visible at night, at least here. So it seems to be > 300
km distant. If my colours are more or less accurate then it comes from
the north.
Do you know what it is?
73, Stefan
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