60 Meters interesting utility signal?

edited July 2018 in Signals Received
Not spotted this before, centred around 5.412 MHz.

The audio clip is here, with a CW ident I think.

It later turned into a FSK signal, same freq no pause.

The TDoA showed an interesting thing...

Any suggestions..




  • jksjks
    edited July 2018
    Sounds like the marine SITOR station channel markers, e.g. TAH:

  • Hi Dave,

    It's a fairly popular frequency, particularly with the Russians, and it could be that you are hearing (and trying to TDoA) a mix of transmissions emanating from more than one source at the same time.

    I'd suggest you join the utility monitors on UDXF@groups.io and take a look at the monthly logs in their files section.


    Martin - G8JNJ
  • Forgot to add.

    This was previously mentioned in the TDoA success thread.

    I found a FSK signal with 500Hz shift on 12183KHz USB which I think comes from Istra near Moscow 55.884167, 36.953611

    So this is pretty close to your TDoA plot too.


    Martin - G8JNJ
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