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Northern Utah WebSDR landing page
sdrutah.org




Notice to Firefox users:  You must now press a button to get audio on a WebSDR!

As of Firefox version 103 (late July, 2022) it is now required that the user do
something  - like click a button. - to enable audio and video on many web sites,
including WebSDRs.  The immediate result was that it "broke" audio for WebSDR
users that use the Firefox browser.  Users of the Chrome and Safari browsers
have already had to do this for some time.

The Northern Utah WebSDR servers now have a Firefox/Mozilla audio start button
that Firefox users MUST press to get audio.  If you do not wish to press that
button every time you load the WebSDR page, please follow the instructions HERE.

The Northern Utah WebSDR's servers may be found at the links below:
 * WebSDR1 ("Yellow") - Covers the 2200, 630, 160, 80/75, 60 and 40 meter
   amateur bands, AM broadcast, the 120, 60 and 49 meter shortwave broadcast
   bands and the 1750 meter LowFER band.
    * Shortcuts:  2200 Meters (136 kHz)  630 meters (474.2 kHz)  AM Broadcast
      (1160 kHz)  160 Meters (1875 kHz)   75 meters (3937 kHz)   60 meters
      (5330.5 kHz)   40 meters (7272 kHz)
    * The 2200 meter receiver's coverage also includes the FCC part 15 "1750"
      meter band and this and the 630 meter receiver collectively cover most of
      the NDB (beacon) frequencies.
    * If the above doesn't work, try this link for WebSDR #1.  This alternative
      link uses HTTP on port 80 and is available only for WebSDR #1 at this
      time.
    * For phones and tablets, there is a simplified, mobile Version of WebSDR
      #1.   (If that doesn't work, try the port 80 alternative for WebSDR #1.)

   
 * WebSDR2 ("Green") - Covers the 30, 20, 17, 15, 12, 10 and 6 meter (bottom 1
   MHz) amateur bands.
    * Shortcuts:  30 meters (10125 kHz)   20 meters (14290 kHz)   17 meters
      (18145 kHz)   15 meters (21250 kHz)   12 meters (24925 kHz)   10 meters
      (28225 kHz)   6 meters (50125 kHz)
    * For phones and tablets, there is a simplified, mobile Version of WebSDR
      #2.

   
 * WebSDR3 ("Blue") - Covers the 80/75, 40, 30 and 2 meter amateur bands and the
   90, 60, 49, 41, 31, 25 and 19 meter shortwave broadcast bands.
    * This server also serves as a back-up for WebSDR1's coverage of the very
      popular 80/75 and 40 meter amateur bands using lower-performance
      receivers.
       * The 60/49 meter receiver also covers the 60 meter amateur band.
         

    * Shortcuts:  75 Meter back-up RX (3937 kHz)  40 meter back-up RX (7272 kHz)
       2 meters - low (145.29 MHz FM)   2 meters - high (146.62 MHz FM)
       * SWBC:  60/49 meters (5000 kHz),  31 Meters (10000 kHz)  25 Meters
         (11725 kHz)  19 Meters (15000 kHz)
   
    * For phones and tablets, there is a simplified, mobile Version of WebSDR
      #3.

 * WebSDR4 ("Magenta") - Covers the 40, 30, 20, 17, 15, 12 and 10 meter amateur
   bands using an east-pointing beam antenna.
    * Shortcuts:  40 meters (7272 kHz)  30 Meters (10125 kHz)  20 meters (14290
      kHz)  17 meters (18145 kHz)  15 meters - (21250 kHz)    12 meters (24925
      kHz)   10 meters - (28225 kHz)
    * This server uses a U.S. Antenna Products (formerly Hy-Gain) LP-1002 that
      is fixed (non-rotatable) on an azimuth of 87° (true).
    * The orientation of its antenna favors the Eastern United States which
      means that the main lobe for DX is oriented toward South Africa, and
      toward Australia and New Zealand via long path.

    * For phones and tablets, there is a simplified, mobile Version of WebSDR
      #4.

 * WebSDR5 ("Teal") - Covers the 30, 20, 17, 15, 12 and 10 meter amateur bands
   using an northwest-pointing beam antenna.
    * Shortcuts:   30 Meters (10125 kHz)  20 meters (14290 kHz)  17 meters
      (18145 kHz)  15 meters - (21250 kHz)    12 meters (24925 kHz)   10 meters
      - (28225 kHz)
    * This server uses a KLM 10-30-7LPA log periodic beam that is fixed
      (non-rotatable) on an azimuth of 278° (true).
    * The orientation of this antenna is to the NorthWest, which means that the
      main lobe is pointed toward the west coast of the US, Canada and Alaska,
      and for DX it is oriented toward Asia - including China, Japan, eastern
      Russia, Australia and New Zealand.

    * For phones and tablets, there is a simplified, mobile Version of WebSDR
      #5.

 * Salt Lake Metro VHF/UHF ("Peach") - This covers the Salt Lake City, Utah area
   from a location in the foothills along the east side of the valley and has
   coverage on the 2 meter and 70 cm amateur bands, a 2 MHz swath of the
   "Aircraft" band, and the bottom 1 MHz of the 6 meter amateur band.
    * Shortcuts: 2 Meter Earth<>Space (145.900 USB)  2 meters - low (145.49 MHz
      FM, squelched)  2 meters - high (146.62 MHz FM, squelched)  70cm repeaters
      - low (446-448 MHz)  70cm repeaters - high (448-450 MHz)  Salt Lake Air
      Traffic (121.1-123.1 MHz) 
    * For phones and tables, there is a simplified, mobile version of this
      WebSDR.

 * There were 92 users on the Northern Utah WebSDR system (WebSDRs 1-5) as of
   Tue Jun 25 03:40:01 PM MDT 2024.
   WebSDR #1 had 32, WebSDR #2 had 29, WebSDR #3 had 3, WebSDR #4 had 25 and
   WebSDR #5 had 3 users.
   

The 2021/2 Survey results are now available:

Many thanks to those who took the time to participate in the 2021/2 survey: 
Your feedback helps us improve the system - An analysis of the results may be
found here.
Having trouble getting WebSDR audio on some Apple devices?


If you are running an APPLE device and/or using the CHROME browser, make sure
that you click on the START button, above and to the right of the waterfall.

Having said that, there are occasional reports that users running Apple iOS 13
have have trouble getting audio on WebSDRs and KiwiSDRs.  While changes have
been made to the Northern Utah Utah 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 if the "START" button does not
   work:
    * 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.


Other WebSDR systems


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

Western U.S.:

 * KFS, Half-Moon Bay, CA  80, 60, 40, 30, 20, 17, 15 and 10 meters.  This is
   the best alternative to the Northern Utah SDR for "local" (e.g. Western U.S.)
   coverage.
 * W7NRA, Phoenix, AZ - KiwiSDR (Limited number of users). 
   
   

Eastern U.S.:
 * K3FEF & W3TKP , Milford, PA - 2 Servers:
    * K3FEF/W3TKP HF/SWBC- 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.
    * K3FEF/W3TKP  VHF - 6 bands that include much of 10 meters, a portion of 6
      meters and 2 meters 
      

 * 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 - 80, 40, 20, 10, 2 meters along with a portion of 70cm.
 * N4BUT, Orlando, FL - 4 bands that include 160, 80, 40 and 20 meters.
   

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).
    * KiwiSDRs 1-3 are connected to the omnidirectional antennas while KiwiSDRs
      4 and 5 are connected to the east-pointing beam and Kiwi #6 is connected
      to the northwest-pointing beam..
    * To visit a KiwiSDR at the Northern Utah WebSDR:
       * Click here to connect to a KiwiSDR connected to the omni antenna
         (KiwiSDRs 1-3).  These KiwiSDRs cover from a few kHz to 30 MHz. 
         Coverage below approx. 400 kHz is via an E-field whip and above this is
         via the TCI-530 omnidirectional antenna.
         
       * Click here to connect to a KiwiSDR connected to the east-pointing beam
         antenna (KiwiSDRs 4 and 5).  These KiwiSDRs cover from about 6 MHz to
         30 MHz owing to the limitations of the beam antenna:  Coverage below 6
         MHz is possible, but sensitivity is increasingly poor with lower
         frequency.
       * Click here to connect to a KiwiSDR connected to the northwest-pointing
         beam antenna (KiwiSDR 6).  This KiwiSDR covers over from about 10 MHz
         to 30 MHz owing to the limitations of the beam antenna:  Coverage below
         10 MHz is possible, but sensitivity is increasingly poor with lower
         frequency.
   
    * 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.
    * For more information about WSPR monitoring at the Nothern Utah WebSDR site
      visit the "WSPRNET Monitoring at the Northern Utah WebSDR" web page.

 * 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.
      

The Northern Utah WebSDR now has a YouTube channel - see it here!


Help support this WebSDR system:

Find out how to donate!

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



The Northern Utah WebSDR is a non-profit 501c(3) organization About this WebSDR
and contact info Technical Information Hardware, software and related articles
Scientific Research at the Northern Utah WebSDR Latest News and known issues
Northern Utah WebSDR FAQ Are you having AUDIO PROBLEMS with a WebSDR?

Join us on
Facebook!

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!


Ever wonder where those static crashes are coming from?

Go to the live lightning map at 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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