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  • Re: Long wave again.

    From charles@21:1/5 to All on Tue Jun 6 08:00:02 2023
    In article <u5mnsb$m5ab$1@dont-email.me>, Brian Gaff <brian1gaff@gmail.com> wrote:
    So the long wave band is seemingly full of blank carriers, and has been
    going that way for some years. What are all these stations? They must be quite powerful, and if you beat a bfo with them you can hear on many low
    bit rate frequency shift keying going on. So this must still be used by somebody. Seems a big wast of a transmitter. Brian

    Possibly Russia, because of the size of the country

    --
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  • From Brian Gaff@21:1/5 to All on Tue Jun 6 08:39:53 2023
    So the long wave band is seemingly full of blank carriers, and has been
    going that way for some years. What are all these stations? They must be
    quite powerful, and if you beat a bfo with them you can hear on many low bit rate frequency shift keying going on. So this must still be used by
    somebody. Seems a big wast of a transmitter.
    Brian

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    Blind user, so no pictures please
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  • From Brian Gaff@21:1/5 to charles on Tue Jun 6 15:17:14 2023
    I wondered if it was a cheap way to move data one way. Have you listened, it sounds a bit like RTTY.
    I have no way of decoding the frequency shifts as they are small and lower than the ear can hear and only notice if you beat a signal with them and
    narrow the bandwidth. These are very strong, and they are not, I think, from Russia.
    Brian

    --

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    "charles" <charles@candehope.me.uk> wrote in message news:5ab02bcfb3charles@candehope.me.uk...
    In article <u5mnsb$m5ab$1@dont-email.me>, Brian Gaff
    <brian1gaff@gmail.com>
    wrote:
    So the long wave band is seemingly full of blank carriers, and has been
    going that way for some years. What are all these stations? They must be
    quite powerful, and if you beat a bfo with them you can hear on many low
    bit rate frequency shift keying going on. So this must still be used by
    somebody. Seems a big wast of a transmitter. Brian

    Possibly Russia, because of the size of the country

    --
    from KT24 in Surrey, England - sent from my RISC OS 4té
    "I'd rather die of exhaustion than die of boredom" Thomas Carlyle

    --- SoupGate-Win32 v1.05
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  • From Rink@21:1/5 to All on Wed Jun 7 14:22:53 2023
    Op 6-6-2023 om 9:39 schreef Brian Gaff:
    So the long wave band is seemingly full of blank carriers, and has
    been going that way for some years. What are all these stations? They
    must be quite powerful, and if you beat a bfo with them you can hear
    on many low bit rate frequency shift keying going on. So this must
    still be used by somebody. Seems a big wast of a transmitter. Brian



    I only know 162 kHz Allouis (France).
    It's for clocks, as far as I know.
    It is 800 kW (!).
    But they will reduce it to 300 kW.
    Still a lot of energy.....

    Do you hear more blank carriers?

    Rink

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  • From Woody@21:1/5 to Rink on Wed Jun 7 18:09:19 2023
    On Wed 07/06/2023 13:22, Rink wrote:
    Op 6-6-2023 om 9:39 schreef Brian Gaff:
    So the long wave band is seemingly full of blank carriers, and has
    been going that way for some years. What are all these stations? They
    must be quite powerful, and if you beat a bfo with them you can hear
    on many low bit rate frequency shift keying going on. So this must
    still be used by somebody. Seems a big wast of a transmitter. Brian



    I only know 162 kHz Allouis (France).
    It's for clocks, as far as I know.
    It is 800 kW (!).
    But they will reduce it to 300 kW.
    Still a lot of energy.....

    Do you hear more blank carriers?


    I think Allouis is now only a frequency standard. I did carry the TDF
    time data (don't know if it still does) but its interesting that
    anything commonly available - such as digital clocks - only ever seem to
    use MSF on 60khz or DCF on 77.5khz? Maybe TDF is only used in France?

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  • From Scott@21:1/5 to All on Wed Jun 7 18:53:33 2023
    On Wed, 7 Jun 2023 18:09:19 +0100, Woody <harrogate3@ntlworld.com>
    wrote:
    [snip]

    Do you hear more blank carriers?

    I think Allouis is now only a frequency standard. I did carry the TDF
    time data (don't know if it still does) but its interesting that
    anything commonly available - such as digital clocks - only ever seem to
    use MSF on 60khz or DCF on 77.5khz? Maybe TDF is only used in France?

    I believe Kalundborg is or was news and shipping forecasts only: https://en.wikipedia.org/wiki/Kalundborg_Transmitter

    Would this mean a blank carrier for the rest of the time?

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  • From Rink@21:1/5 to All on Mon Jul 17 18:11:16 2023
    Op 7-6-2023 om 19:53 schreef Scott:
    On Wed, 7 Jun 2023 18:09:19 +0100, Woody <harrogate3@ntlworld.com>
    wrote:
    [snip]

    Do you hear more blank carriers?

    I think Allouis is now only a frequency standard. I did carry the TDF
    time data (don't know if it still does) but its interesting that
    anything commonly available - such as digital clocks - only ever seem to
    use MSF on 60khz or DCF on 77.5khz? Maybe TDF is only used in France?

    I believe Kalundborg is or was news and shipping forecasts only: https://en.wikipedia.org/wiki/Kalundborg_Transmitter

    Would this mean a blank carrier for the rest of the time?



    50kW a few hours per day
    And the rest of the day a carrier, but only 100 mW....

    http://www.mwlist.org/mwlist_quick_and_easy.php?area=1&kHz=243

    Rink

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  • From Rink@21:1/5 to All on Mon Jul 17 17:59:12 2023
    Op 7-6-2023 om 19:09 schreef Woody:
    On Wed 07/06/2023 13:22, Rink wrote:
    Op 6-6-2023 om 9:39 schreef Brian Gaff:
    So the long wave band is seemingly full of blank carriers, and has
    been going that way for some years. What are all these stations? They
    must be quite powerful, and if you beat a bfo with them you can hear
    on many low bit rate frequency shift keying going on. So this must
    still be used by somebody. Seems a big wast of a transmitter. Brian



    I only know 162 kHz Allouis (France).
    It's for clocks, as far as I know.
    It is 800 kW (!).
    But they will reduce it to 300 kW.
    Still a lot of energy.....

    Do you hear more blank carriers?


    I think Allouis is now only a frequency standard. I did carry the TDF
    time data (don't know if it still does) but its interesting that
    anything commonly available - such as digital clocks - only ever seem to
    use MSF on 60khz or DCF on 77.5khz? Maybe TDF is only used in France?


    TDF is only used in France.
    Maybe the French speaking parts of Belgium and Switserland?

    I thought I read somewhere that thousends of clocks
    on railway stations in France use the 162 kHz.
    So it's really a thing to switch Allouis off.....

    UK use 60 kHz.
    Germany and Netherlands use DCF 77,5 kHz.
    Both using not so much power as Allouis....

    Rink

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