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

ISP bandwidth restrictions limited - but continue to expect occasional slow-downs due to heavy Internet usage:

Our Internet Service Provider (ISP) has informed us that the bandwidth restrictions placed on them by their backhaul provider have been lifted and accordingly, we have changed the Northern Utah WebSDR's configurations (maximum number of users, waterfall speed, timeout limit, audio compression, etc.) to their previous settings.

All users are reminded that with the increased use by industry and education for remote access, Internet usage everywhere has increased dramatically, straining the networks.  Such heavy usage will likely cause occasional disruptions of connectivity to this WebSDR and other web sites that you may visit.  Because the WebSDR is essentially "real time", it cannot be heavily buffered like other streaming services and slow-downs anywhere along the Internet between you and the WebSDR will be more noticeable.  


New features at the Northern Utah WebSDR

Several new features have been added to the WebSDR systems at the Northern Utah WebSDR:
  • DSP Noise Reduction:  This is the same type of noise reduction as found on modern HF receivers that can reduce the background noise/hiss to some extent.
  • Notch2:  This works like the old "Autonotch" feature (now labeled as "Notch1") - but is a bit more functional in that it can handle multiple tones of similar amplitude.  Use "Notch1" for very strong carriers that cause S-meter deflection.
  • High Boost:  This boost higher-frequency speech signals (above about 1500 Hz) by 6 dB.  This may be used to compensate for some high-frequency loss caused by the use of the DSP Noise Reduction and it may be used to improve speech intelligibility for those that may suffer from higher-frequency hearing loss.
The controls for both of these features may be found just above the volume control - try them out!  For more information about these new features, read here.

Survey results:
Many thanks to those who took the time to participate - Results may be found here.
Having trouble getting WebSDR audio on some Apple devices?

There have been reports that users running Apple iOS 13 have have trouble getting audio on WebSDRs and KiwiSDRs.  While 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.
  • Possible "no sound on iOS 13" work-around:
    • The configuration change below has been reported to work for at least some users of iOS 13 devices using the Safari.  Do this ONLY if you don't get either audio or the "iOS Audio Start" button when using your iOS 13 device.
      • Go to: Settings -> Safari -> Request Desktop Website -> All websites.
        • "All websites" is enabled by default.  Disable this setting and try your favorite WebSDR systems.
  • If the above doesn't help,  READ HERE and HERE for more information about this issue.
If you discover issues that you might think are 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.
  • W7NRA, Sedona, AZ - 160, 80 and 40 meter 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 websdr.org 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 publicly 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 the 10, 20, 40, 80 and 630 meter 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
Having trouble accessing the Northern Utah WebSDR?  
Go here for some work-arounds/suggestions.
About this WebSDR and contact info
Donating to/supporting 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

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The Northern Utah WebSDR is a non-profit 501c(3) organization
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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 blitzortung.org 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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