[Fwd: Commercial stations in LF]

[Andre' Kesteloot]

Hi,

André sent a big long email to tacos that bounced because it was too
big. I put the image at

        http://www.amrad.org/projects/lf/Dbf39.jpg

-Maitland

Original message text follows...

M. Bruno wrote:

> Hello Andre',
>
> here is a list of commercial LF stations heard here, with relative
> powers and emission mode. Hope may help.
>
> In particular, the carrier frequency of DBF39 (this seems to be the real
> call) is 138.835 kHz. They modulate in FSK, with about 330 Hz shift.
> Every few seconds they send a packet of ASCII characters at (I presume)
> 100 Bd.
>
> Powers are derived from a message from Gamal Soegiono, who lives
> near DBF39.
>
> 111.250 rtty shift 170 (Warsaw meteo, POL) 40 kW
> 122.500 PSK USB + pilot tone (DCF42, Mainflingen) power? - service is
> differential GPS
> 129.100 rtty shift 300 (DCF49, Mainflingen, same mod as 139.000,) 100 kW -
> mark frq 128.930
> 129.525 rtty 50 bd shift 150 (SOA212, Warszawa Meteo, POL) power?
> 135.750 rtty Greek Navy (Marathon, Sparta) 5/10 kW
> 139.000 rtty shift 300 (DBF39, Burg) 100 kW - mark frq 138.822
> 140.220 carrier (DCF60, Mainflingen ?) 20 kW ?
> 147.300 rtty 50 bd shift 85 (DDH47, Hamburg meteo, D) 50 kW
>
> I enclose a spectrogram of DBF39. The simmetrical bands are the Luxembourg
> effect !
>
> 73 - Marco
>
> p.s.: I'm changing four fets, two drivers and some logic on my TX. This
> afternoon
> I tried unattended operations :-(((
>
>                                                   ------------------------------------------------------------
>
>                    Name: Dbf39.jpg
>    Dbf39.jpg       Type: JPEG Image (image/jpeg)
>                Encoding: base64
>
>                                                   ------------------------------------------------------------
>
> Marco Bruno - IK1ODO
> spin@inrete.it
>
> SPIN Electronics - www.spin-it.com