What signal is on 22.7khz

I have a camper on that frequency that even reconnects after a reboot. I don't mind that much. Just wondering.

SWLcn83 (no ham call just an SWL in grid square cn83).

Gordon

Comments

  • If you switch to the "community" DX label database (hit the backslash key '\' a couple of times) it's listed as the HFGCS PAC FSK frequency (https://en.wikipedia.org/wiki/High_Frequency_Global_Communications_System)

    So it's one of those people that like to monitor those things for, I dunno, early warning of the end of the world or something.

  • Thanks! I also sometimes have someone on 11175 US Air Force HFGCS.

    G

  • Yes; 22.7 kHz is used by E6s over the CONUS Pacific Coast to relay EAMs to subs as FSK data.

    I think I do use your SDR to monitor 11175 kHz sometimes (I rotate through many SDRs to avoid burdening any one individually) but I don't think I've used yours for FSK. Most public SDRs don't seem to be set up to get good reception of the VLF frequencies.

    It seems a bit of a waste to have people camping on SDRs that can't pick the traffic up so I reckon you'd be in your rights...

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