HFU HF Underground

Loggings => HF Mystery Signals => Topic started by: Rizla on December 14, 2020, 1018 UTC

Title: 325 hz Tone, 7310 kHz AM, 12/14/2020 0930z (+)
Post by: Rizla on December 14, 2020, 1018 UTC

Not sure if I'm missing something. This tone was strong at my QTH and Kiwi SDR's in Nevada, Alberta CA, and Missouri. Seems to be gone as of 1000z.

Hopefully these links work...

Audio:
https://www.dropbox.com/s/r4tm8jdcj8qw2qp/12.29.214.134_2020-12-14T09_26_46Z_7310.00_am.wav?dl=0
Screenshot:
https://www.dropbox.com/s/joq6sg1uyo4mcyq/Screenshot%20from%202020-12-14%2002-29-01.png?dl=0

Title: Re: 325 hz Tone, 7310 kHz AM, 12/14/2020 0930z (+)
Post by: PresentedIn4D 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.