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Low Frequency Radio Transmission

AncientMariner
The annual Christmas Eve message will be transmitted in Morse code on December 24th at 08:00 utc (UK Time) on 17.2 kHz. Tuning up commences at about 07:30 utc.

If interested and you do not have a suitable receiver in the conventional sense, you can use the sound card in your pc and this software https://sites.google.com/site/sm6lkm/saqrx/ together with a decent length of wire.

The transmission will be screened live at  YouTube Channel.

Clive

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    For this transmission you do not need the diode - it is not AM on a supersonic frequency like the home service would have been.


    As a historical aside.

    During the war the many regional transmitters were given common central programme content, and all retuned to transmit on one of two frequencies (to confuse any enemy use of radio direction finding) 668kHz (South chain) and 767 kHz (North chain), later augmented by fill in transmitters ("Group H") 1.474 MHz.

    1967, the BBC split the Light Programme into a pop music and entertainment network. The Light Programme became BBC Radio 1 and BBC Radio 2 long wave. The BBC Third Programme became BBC Radio 3,  Home Service was renamed BBC Radio 4.

    In 1978  radio 4 moved to a longwave channel  on 198khz, and radio 2 moved back to medium wave.

    The easiest to receive on a crystal set would be longwave and the longer end of the medium wave.

    This transmission is  quite different,  being at a frequency so low 17kHz, that it can be fed directly into the microphone input to a soundcard, after all, it is generated by a rotating genset, not a valve in sight..

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  • 0
    For this transmission you do not need the diode - it is not AM on a supersonic frequency like the home service would have been.


    As a historical aside.

    During the war the many regional transmitters were given common central programme content, and all retuned to transmit on one of two frequencies (to confuse any enemy use of radio direction finding) 668kHz (South chain) and 767 kHz (North chain), later augmented by fill in transmitters ("Group H") 1.474 MHz.

    1967, the BBC split the Light Programme into a pop music and entertainment network. The Light Programme became BBC Radio 1 and BBC Radio 2 long wave. The BBC Third Programme became BBC Radio 3,  Home Service was renamed BBC Radio 4.

    In 1978  radio 4 moved to a longwave channel  on 198khz, and radio 2 moved back to medium wave.

    The easiest to receive on a crystal set would be longwave and the longer end of the medium wave.

    This transmission is  quite different,  being at a frequency so low 17kHz, that it can be fed directly into the microphone input to a soundcard, after all, it is generated by a rotating genset, not a valve in sight..

Children
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