Northern Utah WebSDR landing page
The Northern Utah WebSDR's three servers available via the links below:

Survey results:   Many thanks to those who took the time to participate - Results may be found here.

Possible issues related to the WebSDR system(s):

  • No audio on some Apple devices: There have been reports that certain devices running Apple iOS 13 - and possibly other versions - may have "broken" audio:  Changes have been made to this WebSDRs to fix an issue that had prevented the "iOS Audio Start" button from appearing, but it may not work in all cases -  READ HERE and HERE for more information about this issue.
  • White screen when you try to listen to a WebSDR with the above links - Some possible causes:
    • HTTPS versus HTTP:  Your browser may be trying to automatically load this or another WebSDR as a "secure" page - Try closing and re-opening the browser - but if this doesn't work, the only sure-fire "fix" for this problem is to clear the cache on your browser.   For more information read the 30 October, 2019 entry on "Latest News and known issues" page.
    • WebSDR may be offline:  If, for some reason, there is a network outage of a WebSDR servers you will get only a white screen if you try to go a specific WebSDR.  You can tell if the servers themselves are down by going to the main site:  If the Northern Utah WebSDR servers are listed, they are up.
    • Not in "trusted" zone:  If you are running a very strict firewall and the above two possibilities aren't true, you may need to put the WebSDR page(s) in your "trusted zone" or its equivalent.
  • "Memory" buttons not working:  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.

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: to tune to 7272.0 kHz, LSB.
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:

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.:
  • K3FEF & W3TKP, Milford, PA - 7 bands that include amateur and broadcast on the MW/160, 90/80, 60/49/41/40, 31/30, 25/22, 20/19 and 17 meter bands.
  • NA5B near Washington DC - 2 Servers:
    • NA5B HF/SWBC:  - 8 bands that include amateur and broadcast on the MW/160, 90/80, 60/49/41/40, 31/30, 25/22, 20/19, 15/13 and 11/10 meter bands
    • NA5B VHF:  4 bands that include:  6 Meters (50-52 MHz), Air band (119-121 MHz), 2 meters (approx. 145.35-147.40) and NOAA Weather Radio (approx. 162.1-163.9 MHz).
  • N4BBQ, Dalhonega, GA - 2 bands that include amateur and broadcast coverage on the 90/80 and 41/40 meter bands..
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).
    • To visit a KiwiSDR at the Northern Utah WebSDR, click here.  Again, please refrain from using a KiwiSDR to listen to a frequency/mode already supported by the main WebSDR system.
  • "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 all LF, MF and HF amateur bands (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
Potential WebSDR system outages:

Because of ongoing work by the power utility, there may be occasional, extended outages of the WebSDR servers.  We will try to minimizes these outages as much as practical (e.g. generator power) but continuous, unterrupted service may not be practical during this period.

Additionally, it is possible that with the service interruptions, some gear (network, computer) may not always recover gracefully after power restoration.  

For more information, please read this entry on the "Latest News" page.
About this WebSDR and contact info
Donating to/suppporting the Northern Utah WebSDR
Technical Information
Latest News and known issues
Northern Utah WebSDR FAQ
Audio problems on Apple devices and/or with Chrome/Safari?

Help support this WebSDR system:

Find out how to donate!

You may donate via PayPal - or via cash/check/etc. if you don't wish to use PayPal

PayPal Logo - Support the Northern Utah WebSDR

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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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