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HF Mystery Signals / Re: 325 hz Tone, 7310 kHz AM, 12/14/2020 0930z (+)
« on: December 15, 2020, 1536 UTC »
Sounds like the lower sideband of a DRM signal running in its 5khz usb mode. I believe 7315 is a WINB frequency, and WINB uses that DRM mode...The screenshot sure looks like that, too.