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: unid whistle on 13.554 Mhz 3/25/14 14:00utc  (Read 1022 times)

Offline N8OOU

  • Newbie
  • *
  • Posts: 7
    • View Profile
    • Email
unid whistle on 13.554 Mhz 3/25/14 14:00utc
« on: March 26, 2014, 0115 UTC »
Hello my name is Mike, and while I have been a reader here for a while, this is my first post. I have been a SWL since the 60's, so have heard many different things over the years. However this is a new type of transmission for me.

While having the radio set to capture “hi-Fer” beacons using Argo running on the pc I heard sounds of what I would describe as human whistles. There is a variation in the whistles, but seem to be repeated in patterns, suggesting some type on information is being passed. I have heard this off and on over the past couple months. The signals are weak, generally not budging the s-meter, and had been received in the daylight hours only.

I have searched the forums here, as well as google and other internet places without finding additional information. I hope the group can provide some additional insite.

You can listen to a recording of 13.554 USB,  made on 03/25/2014 at 14:00 utc here


Thanks for reading.   73  de N8OOU Mike
de N8OOU Mike
Kenwood TS-480HX - OCF dipole/5 band trap vertical
Part 15 WM beacon operator


HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns