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Author Topic: Amateur mode 7040kHz PSK variant?  (Read 1608 times)

Offline alleycat

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Amateur mode 7040kHz PSK variant?
« on: March 30, 2021, 0143 UTC »
I'm seeing 2-minute long narrowband (roughly 75 Hz wide?) digital QSOs on 7040 kHz that I can't identify (apparently nothing similar at SigIdWiki). I think it might be some variant of PSK based on the resources at http://www.w1hkj.com/modes/index.htm, but I ran through all these modes in MultiPSK to no avail. Audio at https://www.lutins.org/temp/radio/7040_digi.mp3 waterfall as shown below. Thanks for any assistance!
allen lutins - KC2KLC
Binghamton, NY
Rigs: Yaesu FT-897D, Elecraft KX3, RTL-SDR Blog V3 & SDRPlay RSP1A
Antennas: G5RV Jr dipole, Alpha Antenna EZMilitary portable vertical & Grove Omni-II discone
eQSLs welcome: kc2klc@lutins.net

Offline W3KEV

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Re: Amateur mode 7040kHz PSK variant?
« Reply #1 on: November 01, 2024, 0318 UTC »
I hear it too.  All day long.  Tunkhannock, PA.  Haven't been able to identify it. I thought maybe it was something local, like noise from an appliance or a charger or something,  but I'm picking it up on webSDR all over the country.

 

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