WebSDR Outage Notice:
Due to upgrades by the power utility, there will likely be extended outages of Northern Utah WebSDR and all of its servers through at least Friday, November 22, 2019.
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.
WebSDR's three servers
available via the
- WebSDR1 ("Yellow")
- Covers the 160,
meter amateur bands, AM
broadcast, the 120,
- WebSDR2 ("Green")
- Covers the 30,
meter (bottom 1 MHz)
amateur bands and the 31
meter shortwave broadcast bands.
- WebSDR3 ("Blue")
- Covers the 2200,
and 2 meter
amateur bands, the 90,
broadcast bands, the "1750
and it provides a back-up for WebSDR1's coverage of the very popular 80/75 and 40 meter amateur
We would like to hear from you - please take a
moment to answer our 8 question survey! Click here.
it only once.) We'll keep the survey active for
several weeks and post the results after it closes.
audio on some Apple devices and/or after upgrading to iOS 13: 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 WebSDR to effect a work-around, but it may not work in all cases - READ HERE
and HERE for more information about this issue.
screen when you try to listen to a WebSDR with the above links -
versus HTTP: There
was a possible issue for those whose browsers defaulted to "https" mode
when they landed at this web page: We believe that we have
this. For more
information read the 30 October, 2019 entry on "Latest News and known
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 websdr.org
site: If the Northern Utah WebSDR servers are listed, they
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.
buttons not working: We have been getting
occasional reports that
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.
believe that we have fixed two earlier issues:
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"
- The above links should now work with the Microsoft Edge
- You can now apply the frequency and mode to the
URL, as in: sdrutah.org/websdr1.html?tune=7272lsb
to tune to 7272.0 kHz, LSB.
the recent change in the WebSDR's pages/domain? Read here.
For different geographical coverage, here are a
few selected WebSDRs:
Bay, CA - 160, 80, 40 and 20 meter coverage.
This is the
to the Northern Utah SDR for "local" (e.g. Western U.S.)
list of WebSDR systems worldwide, go to the websdr.org page.
Milford, PA - MW/160, 80, 40, 30, 25, 20 and 17
Washington DC - MW/160, 80, 40, 30, 25, 20, 15
and 10 meter coverage.
Dalhonega, GA - MW/160, 80, 40, and 20
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:
These are stand-alone HF receivers capable of tuning from
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
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
- 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.
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.
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
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
- This site provides at-a-glance graphs of noise plots on the
participating bands and receive sites.