We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Author Topic: Amateur mode 7040kHz PSK variant?  (Read 1565 times)

Offline alleycat

  • Sr. Member
  • ****
  • Posts: 255
  • Binghamton, NY
    • View Profile
    • KC2KLC ham radio page
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

  • Newbie
  • *
  • Posts: 1
    • View Profile
    • Email
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.

 

HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns