October 26th, 2014

Some shortwave static, then a weird 'melody' made out of sine wave tones. No idea what it is. Picked up with the Twente University online radio reciever, on shortwave (http://websdr.ewi.utwente.nl:8901/). Recorded on the website.

The 14077 project is a freesound quest by kwahmah_02 to crack a mysterious station on shortwave with encrypted content, based at 14077.23kHz. Its broadcasts are musical-sounding tones, it could be a 'numbers station' without voices but this question presently remains unanswered.


  • avatar
    kb7clx 1 year, 4 months ago

    It's just an amateur radio weak signal digital mode called jt65 or something like it. Several stations can be heard packed into a small frequency range. The bit-rate is very slow and it uses more than just 2 alternating tones. It can be received when the human ear can't even hear the tones, that's why these digital modes are popular these days. Lots of people with small antennas inside apartments and home owner's association dominated neighborhoods that don't allow outside antennas can still play on the ham radio hf bands. Hams can use the output of their computer's sound card to generate any odd digital mode they can dream up with as many varying tones they care to use.

  • avatar
    levelclearer 1 year, 9 months ago

    super ! thanx for puting it here.

    2 commentss

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