This system - which is part of the Northern Utah WebSDR - system allows user monitoring of the two meter band and the top 4 MHz (repeater outputs) of the 70 centimeter amateur radio band from a location in East Mill Creek, Utah along the east benches of the Salt Lake valley at an elevation of 4800 Ft ASL (1460 M), approximately 600 Ft (180 M)) above the valley floor.
This receive system covers Salt Lake City and surrounding communities in the Salt Lake valley. It has limited visibility into Davis and Weber counties to the north, Tooele county to the west, and only marginal coverage into the western portions of Utah County to the south.
Important information predicting satellite passes:
- The "SLC ATC" receiver has been configured to receive a 2 MHz swath centered at 122.1 MHz to permit reception of some of the local air traffic control frequencies. No additional frequencies are possible at this time owing to the fixed frequency nature of the receiver, the 2 MHz maximum bandwidth and the lack of available hardware.
- Reciever and antenna upgraded on the 2 meter Earth<>Space receiver:
The 2 meter "Space-to-Earth" receiver was significantly upgraded on 25 October, 2023:
- An M2 "Egg Beater" 2 meter satellite antenna was installed and the RTL-SDR receiver was replaced with an SDRPlay RSP1a which offers vastly superior sensitivity and signal-handling capability.
- This receiver has a 300kHz front-end passband to reject signals from elsewhere on 2 meters, hence the dark edges on the waterfall.
- There is some local powerline noise just above the thermal noise floor, but the software noise blanker on the WebSDR seems to do a decent job of suppressing it.
If you calculate satellite passes and you intend to listen to the signals on THIS server, be sure to calculate the passes for Salt Lake City, Utah and NOT YOUR QTH - that is, unless you happen to be near Salt Lake City!
Additional information about this server:
For more information about this server, how its features work and how its receivers and antennas are configured, visit the Info page.
Note about reception of transmissions with subaudible tones
A number of the repeaters that may be received by this system transmit a subaudible ("PL", "CTCSS") tone. If you find this tone to be objectionable, check the NOTCH 2 box just below the volume control to remove it. If you know the frequency of the tone, you may selectively remove it using the "Vari-Notch, using the slider.
To invoke this page with a preset frequency and mode, append "/?tune=(freq
" to the URL and save it as a bookmark,
This will load the page and tune to 146.62 MHz, FM.
To pre-set the S-meter squelch, add "smsquelch=[n]" as in:
Where "n" is the S-meter reading - which is ALWAYS negative - above which the S-meter reading causes the squelch to open. This value should be 3-6 dB above the no-signal S-meter reading for that particular band/receiver combination.
If you find that CatSync does not work with this WebSDR, add "?10hz" to the URL.
Additional URL parameters are described on the "FAQ" page here.