ARRL

Emitters

Transmitters and Intentional RF Emitters

The files in this section are recordings of RF noise from known transmitters and RF emitters. If you can match noise at your location to one of these files then you can be confident that you know where your noise is coming from. Now all you have to do is find it and fix it!

  • 458 kHz USB, in the longwave band

    Contributor: Ken, VE3HLS
    Noise Source: Unidentified
    Where Found: 458 kHz USB, in the longwave band
    Notes: Not particularly bothersome, and it might even be a legitimate transmission of some kind. E-mail me at ve3hls@rac.ca if you know!  You can also E-mail this author at bearscorner@aol.com.

    Click this link to listen:  www.arrl.org/files/file/RFI Sounds/unid-458khz.mp3

    unid_458khz.gif

     

  • CODAR

    >> NEW - April 24, 2005 <<
    Contributor:Ken, WB0OCV
    Noise Source: CODAR
    Where Found: 60m band
    Notes: CODAR is a type of HF radar, commonly used for mapping the ocean's surface and currents. A Google search on CODAR will turn up many useful references.

    Note: There are three separate groups of "sweeps" in the recording. I believe the first group was recorded in LSB, the next group in AM and the final group in USB...Ken

    Click this link to listen:  www.arrl.org/files/file/RFI Sounds/wb0ocv-codar.mp3

    wb0ocv_codar.gif

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