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: 7040 kHz - 5 second bursts, 150 kHz bandwidth  (Read 1401 times)

Offline alleycat

  • Full Member
  • ***
  • Posts: 245
  • Binghamton, NY
    • View Profile
    • KC2KLC ham radio page
7040 kHz - 5 second bursts, 150 kHz bandwidth
« on: March 14, 2021, 0207 UTC »
I'm familiar with most common amateur digital modes, but tonight I'm hearing (a new?) one on 40m from several stations that doesn't appear to be represented at SigIdWiki. Audio at https://www.lutins.org/temp/7042.mp3; waterfall thus:
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 refmo

  • Marconi Class DXer
  • ********
  • Posts: 7880
  • Northeast Kentucky
    • View Profile
Re: 7040 kHz - 5 second bursts, 150 kHz bandwidth
« Reply #1 on: March 14, 2021, 1703 UTC »
That is the fairly normal PSK-63 digital mode (maybe slightly over-driven).  7040 khz is the standard 40m frequency for these in IARU Region 1.

Here is the decoded text from your audio recording....
CQ EA TEST EA6SX EA6SX EA6SX
-
CQ EA TEST EA6SX EA6SX EA6SX
-
CQ EA TEST EA6SX EA6SX EA6SX
Northeast Kentucky
Please eQSL to refmo[at]outlook[dot]com
Radios: Afedri AFE822x, Airspy HF+, RX-888, RSPdx, Tecsun PL880
Antennas: 700' Loop Skywire, Wellbrook ALA1530LN Loop, 400' Beverage, 34' Vertical, low dipoles on upper bands.

Offline alleycat

  • Full Member
  • ***
  • Posts: 245
  • Binghamton, NY
    • View Profile
    • KC2KLC ham radio page
Re: 7040 kHz - 5 second bursts, 150 kHz bandwidth
« Reply #2 on: March 14, 2021, 2058 UTC »
Excellent! Not sure how that one got by me, as it's not all that new. I've used several applications that support that mode, so I'll have to give it a try. Thanks!
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

 

HFUnderground T-Shirt
HFUnderground House Flag
by MitchellTimeDesigns