HFU HF Underground

Loggings => ID and Translation Requests => Topic started by: DeepBlue on November 09, 2022, 0400 UTC

Title: 502 KHz UNID?
Post by: DeepBlue on November 09, 2022, 0400 UTC

Seems to be constantly repeating the same 2 tone type signal approx 10 sec duration over and over. I can't seem to find much if anything on 502KHz stations.  This is not CW. Maybe some new format for beacons I am not familiar with?

Hearing it at S7 in central Ohio, SRRPlay RSP2pro and RF Systems DX10 active antenna, 0358 Nov 9, 2022

Anyone?

Thanks.

Title: Re: 502 KHz UNID?
Post by: ~SIGINT~ on November 10, 2022, 0132 UTC

Have you tried 518 kHz? That is an international NAVTEX frequency (shore to ship). It's narrow, only about 40 kHz wide, but if you are using a wide filter on the receiver you might be picking it up.