Northern Utah WebSDR
Welcome to the landing page for the Northern Utah WebSDR

There are three WebSDR systems available via the links below - Please remember to update your bookmarks!
  • WebSDR1 (the "Yellow" server) - This WebSDR server covers the 160, 80/75, 60 and 40 meter amateur bands as well as the AM broadcast band, the 120, 69 and 49 meter shortwave broadcast bands.
  • WebSDR2 (the "Green" server) - This WebSDR server covers the 30, 20, 17, 15, 12, 10 and the 6 meter (bottom 1 MHz) amateur bands and the 31 and 13 meter shortwave broadcast bands.
  • WebSDR3 (the "Blue" server) - This WebSDR server covers the 2200, 630 and 2 meter amateur bands.  It also covers the 90, 41, 25 and 19 meter shortwave broadcast bands and provides redundancy for WebSDR1's coverage of the very popular 80/75 and 40 meter amateur bands.
We believe that we have fixed two earlier issues:
  • The above links should now work with the Microsoft Edge browser.
  • You can now apply the frequency and mode to the URL, as in:
Possible issue:
  • We have been getting occasional reports that the "memory" channels on the WebSDRs - which use cookies placed on your computer - aren't working.  We have been unable to replicate this issue using configurations typical to most users (e.g. Windows or IOS and using the Chrome, Firefox, Safari and Edge browsers):  As far as we can tell, it may be specific to certain browsers on some Linux distributions.
If you get a "blank" page from the above three links:
  • Try a different browser:  Recommended browsers include Chrome, Firefox and PaleMoon.
  • If that doesn't help, try a different computer on the same Internet connection - and if that works, check the Firewall settings on the first computer:  You may have to put "" and the WebSDR servers themselves in a "trusted" zone and/or put on the "allowed" list..
  • If you get a blank screen on both computers on the same Internet connection there may be a firewall/router setting that prohibits redirects, requiring that "" be put into the "trusted" zone and/or put on the "allowed" list.
If you discover other issues related to browser compatibility, please let us know via the contact information on the "About this WebSDR and contact info" page.

Why the recent change in the WebSDR's pages/domain?  Read here.
Other WebSDR systems

For different geographical coverage, here are a few selected WebSDRs available for use:

Western U.S.:

  • KFS, Half-Moon Bay, CA  - 160, 80, 40 and 20 meter coverage.  This is the best alternative to the Northern Utah SDR for "local" (e.g. Western U.S.) coverage.
Eastern U.S.: For a complete list of WebSDR systems worldwide, go to the page.
Other things going on at the Northern Utah WebSDR

In addition to the WebSDR receivers, there are a few other things going on at the Northern Utah WebSDR, including:
  • KiwiSDR receivers.  These are stand-alone HF receivers capable of tuning from near DC to 30 MHz, continuously, and are capable not only decoding normal "voice" modes (USB, LSB, AM, FM) but they also have the capability of decoding other types of signals - including RTTY, FAX, SSTV (Slow-Scan TV), and decode CW.  These receivers are also part of a TDOA (Time Direction of Arrival) network that allow the approximate locations of received signals to be determined.  
    • Please note that these receivers can only support a few users at a time so please refrain from using them when receiving on a frequency/mode that is already supported by the main WebSDR system!
    • For more information about the KiwiSDRs, read HERE (link).
  • "All band" WSPRNET monitoring.  Using the KiwiSDRs in conjunction with scripts running on another local machine there are virtual receivers monitoring the WSPR bands on LF, MF and HF amateur bands all (e.g. 2200, 630, 160, 80, 60, 40, 30, 20, 17, 15, 12 and 10 meters) using the callsign "KA7OEI-1".  These receivers are using the excellent antenna system on site to receive, decode and contribute WSPR spots and forward that information to the WSPRNET (link) web site where the results are aggregated and made publically available.
  • HF Noise monitoring.  Also using the KiwiSDRs - and related to the WSPRNET monitoring - the HF noise floor is also being monitored at this site.  The results of this may be analyzed to discern band openings, the influences of the sun's activity, lightning static - and perhaps a few other things related to HF propagation and the Earth's geomagnetic field.  Results of this monitoring may be seen at the following links:
    • Grafana Noise Dashboard - This link automatically selects the Northern Utah WebSDR system and all bands - use the drop-down menus to select specific bands and/or receivers of interest.
    • WSPRdaemon - This site provides at-a-glance graphs of noise plots on the participating bands and receive sites.
Northern Utah WebSDR Logo - A skep with a Yagi
About this WebSDR and contact info
Technical Information
Latest News and known issues
Northern Utah WebSDR FAQ
Audio problems with Chrome/Safari?

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Featured Project:
Automatic computer audio muting for your HF transceiver.

Stop being driven crazy by the echo and eliminate the need to manually mute the WebSDR audio when you transmit!

Find out more!

Lightning cloud
Ever wonder where those static crashes are coming from?

Go to the web page and find out!

The Northern Utah WebSDR
is operated by a group of volunteers in conjunction with a non-profit organization set up specifically for the support of the WebSDR.  Many of these volunteers are members of other local amateur radio clubs, but the Northern Utah WebSDR itself is not associated with any of these clubs.  See the about page for more information.

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