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-   -   Unknow 4770 kHz (http://www.drmrx.org/forum/showthread.php?t=2812)

f1tay 25-08-2018 18:40

Unknow 4770 kHz
 
Fort signal DRM sur 4770 kHz à 18h15.
Indication :
DRM SERVICE A

Pas d'audio juste du data.

AF4MP 25-08-2018 20:20

1 Attachment(s)
KiwiSDR direction finding via TDoA puts the transmitter somewhere in the Alps of SE Switzerland near the border of NW Italy at approximately 46.35 deg N, 9.70 deg E.

MARCEL 25-08-2018 21:02

Yes I receive signal of S/meter S9+20 db no audio, SODIRA audio codec CELT !!! :

https://nsa39.casimages.com/img/2018...5001555890.jpg

https://nsa39.casimages.com/img/2018...5034388289.jpg

Owdjim 26-08-2018 00:37

2 Attachment(s)
Noted, via a KiwiSDR near Wilhelmshaven, running some sort of data service using half the channel at 00:05 UTC, 2018/08/26.

Cheers, Chris

AF4MP 26-08-2018 02:00

Quote:

Originally Posted by Owdjim
Noted, via a KiwiSDR near Wilhelmshaven, running some sort of data service using half the channel at 00:05 UTC


Interesting, 'cos at the time I was trying to DF the signal the spectrum looked like normal 10 kHz DRM.

Marcel's SODIRA scan also shows a normal type DRM signal but perhaps 9 kHz or a little less wide.

AF4MP 26-08-2018 02:10

1 Attachment(s)
In fact Marcel's screen ID does show B/10 kHz as the Mode/Bandwidth (see attachment).

Owdjim 26-08-2018 02:15

2 Attachment(s)
They were 10 kHz bw until 00:00 UTC, then 5 kHz.

Also noted on KiwiSDRs in Sardinia & Ireland.

Cheers, Chris

AF4MP 26-08-2018 02:27

Although the KiwiSDR TDoA shows the transmitter location as Switzerland, the Principality of Liechtenstein is only 30 or so kilometers to the north and close enough to the DF circles, to make that country host to the transmitter site!

Vaduz, the capital of Liechtenstein, is known as a big financial center is only 80 km from the DF'd location.

f1tay 26-08-2018 14:44

Quote:

Originally Posted by AF4MP
KiwiSDR direction finding via TDoA puts the transmitter somewhere in the Alps of SE Switzerland near the border of NW Italy at approximately 46.35 deg N, 9.70 deg E.


Peut être Berne Radio à Prangins 46°24'24" N 6°15'4" E ?

Daniel

f1tay 26-08-2018 14:56

D'après ce site : http://www.utilityradio.com/stations...sui/sui-63.htm
Bern Radio utilisait en télétype la fréquence de 4764,7 kHz soit à -5 kHz de 4770 kHz..

mitajohn 26-08-2018 20:01

Aug_26
 
1 Attachment(s)
I got a label on 4770kHz from Kuwait.

MARCEL 27-08-2018 16:41

16H10 UTC I have DRM signal of 4770 Khz.

DRM Hdn 27-08-2018 18:55

Unknow 4770 kHz
 
1 Attachment(s)
Signal also visible here but no chance to decode it. Very interesting is only 5 kHz is sending out...

DRM Hdn 27-08-2018 19:08

Unknow 4770 kHz
 
2 Attachment(s)
see the attachments

MARCEL 27-08-2018 19:26

Hallo Hdn,

Alles wie bei mir.

https://nsa39.casimages.com/img/2018...1510381188.jpg


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