WebSDR landing page
WebSDR's three servers
available via the
- Covers the 160,
meter amateur bands, AM
broadcast, the 120,
- Covers the 30,
meter (bottom 1 MHz)
amateur bands and the 31
meter shortwave broadcast bands.
- 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
Many thanks to those who took the time to participate - Results
may be found here.
issues related to the WebSDR system(s):
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
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.
screen when you try to listen to a WebSDR with the above links -
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
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
Bay, CA - 160, 80, 40 and 20 meter coverage.
This is the
to the Northern Utah SDR for "local" (e.g. Western U.S.)
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.
Washington DC - 2 Servers:
HF/SWBC: - 8 bands that include amateur and
broadcast on the MW/160,
90/80, 60/49/41/40, 31/30, 25/22,
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).
list of WebSDR systems worldwide, go to the websdr.org page.
Dalhonega, GA - 2 bands that include amateur and
broadcast coverage on the 90/80 and 41/40 meter bands..
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
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.
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.