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Re: AW: LF: DBF39 off-air

To: [email protected]
Subject: Re: AW: LF: DBF39 off-air
From: Väinö Lehtoranta <[email protected]>
Date: Mon, 12 Apr 1999 11:08:32 +0300
In-reply-to: <[email protected]>
Reply-to: [email protected]
Sender: <[email protected]>
Mille grazie caro Gamal per informazione!

That is very very useful for me as I intend to
analyze the field strength measuring data produced
at the Jokela Measuring station.
I'm retired propagation researcher and pilot and
dont' have DL QTC available at the moment but
I'm a member of RSGB and send monthly propagation
info for PSC (Propagation studies Committee)
Have been measuring LF stations for 35 years and
we monitor Aeronautical and Maritime beacons etc.
Can you hear Datatrak stations around 132 & 145 kHz?

All the best, Ciao                   de Vaino







At 09:46 12.4.1999 +0100, you wrote:
Hello Vaino, OH2LX

        OH2LX> Hello folks, I'm a newcomer to this mailing list,

        Welcome here.

OH2LX> Incidentally measured frequencies of DCF39/49 OH2LX> yesterday. DCF77 (77.5) and DCF39 (138.83/139.17) OH2LX> are continuously Fs recorded here at our Monitoring OH2LX> Station (qth: Jokela, 60N34 25E00), that's for LF OH2LX> propagation studies.

        Good idea ! Have done this in Nov-Jan and observed some
        interesting pattern, loosely related with geomagnetic
        index. Should you be interested please let me know.

        OH2LX> Qth of the latter is Burg, perhaps that is why somebody
OH2LX> may call it DBF39. The perhaps first usage of "DBF39" I found in an article from Walter Staubach, DJ2LF in german magazine CQ-DL May 1998 page 372.


        OH2LX>  Qth of DCF49 probably Mainflingen?
Some collected data for mentioned stations:

        ==========================================
        Station DCF39
        ==========================================
        nominal frequency               139.000 kHz
        modulation: ASCII (8E1) 200 baud FSK 340Hz shift
        mark_frequency                  138.830 kHz
        space_frequency                 139.170 kHz
        -------------------------------------------
        latitude                        52N55   *)
        longitude                       10E18   *)
        locator                         JO52XH  *)
        located at Burg near Magdeburg
        *) = accurate to 10km
        -------------------------------------------
        user (remote control service):
        EFR - Europaeische Funk-Rundsteuerung GmbH
        Wilhelm von Siemens Strasse 2-10
        D-12277 Berlin
        Germany
        phone   +49-30-2671-7055
        fax     +49-30-2671-7832

        operator:
        Deutsche Telekom AG




        There are 6 antennas on this site:


        (1) 210m vertical monopole
        This is a guyed isolated tubular mast
        used for transmissions of DCF39/DBF39
powered by Telsa Transmitter which is designed for nominal 200kW
        but presently operated with 50kW HFout

        (2) 210m vertical monopole
        This is a guyed isolated tubular mast
        presently unused
        formerly used for MW transmissions

        (3) 324m vertical biconical antenna
        This is a hexafilar wire antenna
        supported by fabric mast
        used for BC transmissions of
        "Radioropa Info" on 261kHz
powered by Telefunken Transmitter which is a MOSFET amp providing
        50kW HFout

(4) triple, 70m octofilar horizontal dipole presently unused
        formerly used for MW transmissions
        (1575kHz Radio Berlin Intenational)

(5) 55m trideco antenna presently unused
        formerly used for MW transmissions as backup antenna

(6) 55m trideco antenna presently unused
        formerly used for MW transmissions as backup antenna
        ==========================================


        ==========================================
        Station DCF49
        ==========================================
        nominal frequency               129.100 kHz
        modulation: ASCII (8E1) 200 baud FSK 340Hz shift
        mark_frequency                  128.930 kHz
        space_frequency                 129.270 kHz
        -------------------------------------------
        latitude                        50N00
        longitude                       08E49
        locator                         JO40VA
        located at Mainflingen near Frankfurt

        user (remote control service):
        EFR - Europaeische Funk-Rundsteuerung GmbH
        Wilhelm von Siemens Strasse 2-10
        D-12277 Berlin
        Germany
        phone   +49-30-2671-7055
        fax     +49-30-2671-7832

        operator:
        Deutsche Telekom AG

        ==========================================
        Station DCF42
        ==========================================
        carrier frequency               122.50 kHz
        start of modulation             122.50 kHz
        maximum of modulation           123.70 kHz
        end of modulation               124.90 kHz
        ---------------------------------------------------------
        latitude                        50N00
        longitude                       08E49
        locator                         JO40VA
        located at Mainflingen near Frankfurt

        Broadcast of Differential GPS Data
        ALF=Accurate positioning by Low Frequency
        modulation: Single Sideband PSK

        operator:
        Deutsche Telekom AG
        ==========================================

        ==========================================
        Station DCF77
        ==========================================
        carrier frequency               77.50 kHz
        --------------------------------------------
        latitude                        50N00
        longitude                       08E49
        locator                         JO40VA
        located at Mainflingen near Frankfurt

        Broadcast of standard time and frequency

        user:
        Physikalisch-Technische Bundesanstalt
        Labor fuer Zeiteinheit
        Bundesallee 100
        D-38116 Braunschweig
        Germany

        operator:
        Deutsche Telekom AG
        ==========================================


Best 73
        Gamal Soegiono (SWL)

        50N01 / 08E27 / JO 40 fa
        [email protected]
        [email protected]


----------------------------------------------------------
V.K.Lehtoranta, OH2LX, POBox 50, FIN-05401 Jokela, Finland
------ Tel: +358-9-4173965 ---- Fax: +358-9-4173961 ------
E-mail: [email protected] - alias: [email protected] & [email protected]

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