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HF Mystery Signals / Re: 6775 Serdolik or VARA
« on: May 08, 2022, 1924 UTC »
That looks & sounds like a 500 Hz VARA transmission, plus 6775.0 USB is a known frequency carrying HF VARA. In addition to 6775.0, you can find HF VARA on 3391.0, 4560.0, 4906.0, 7860,0, 9217.0 & 10267.0, all USB.