DELL OPTIPLEX 3020 (Intel Core i3 4130 with 4GB RAM)
Linux Debian Server 64bit
Receivers & Antennas
Band 80m (2.70 - 4.70MHz): USB dongle RTL2832u with R828D
Band 40m (6.00 - 8.00MHz): USB dongle RTL2832u with R828D
Band 20m (13.00 - 15.00MHz): USB dongle RTL2832u with R828D
RA0SMS Mini-Whip antenna with NooElec Ham It Up v1.2 Upconverter and 4-way Splitter
Band 2m (144.00 - 146.00MHz): USB dongle RTL2832u with R828D
Band PMR466 (445.00 - 447.00MHz): USB dongle RTL2832u with R828D
Band Radiosonde (400.50 - 402.50MHz): USB dongle RTL2832u with R828D
DIAMOND CR8900 antenna with 3-way Splitter
Antennas are installed about 9-10m off the ground.
2016-01-01: The first attempts to start the WebSDR server. 2016-04-25: The WebSDR server has been suspended. 2017-12-20: WebSDR server reactivation with 80m and 40m bands. 2018-01-24: Added 2m band. 2018-04-21: Under the waterfall have been added tabs with frequencies presets. 2018-05-13: Added 20m band. 2018-05-10: Modified website interface. 2018-06-04: Added number stations schedule and Google Calendar events from website priyom.org 2018-06-08: Added server temperature monitor. 2018-06-24: Added new bands: 11m and 4m. 2018-07-22: The 11m band has been changed to the PMR 446MHz band. 2018-12-14: Bandwidth and drag to tune on waterfall. 2018-12-30: Launched receiver in the frequency range 400.500 - 402.500 MHz. TEST 2019-01-09: WebSDR support CAT4Web. More Informations on cat4web.r8acc.ru (RUS lang.) or cat4web manual guide (ENG and PL lang.) 2019-01-10: The NooElec Ham It Up upconverter was replaced with a 125MHz oscillator version. 2019-01-11: The frequency of received signals for the 80m, 40m and 20m bands was corrected. 2019-01-19: The first successful reception of radiosonde P2310571 which was sent from Poprad in Slovakia - click for view track. 2019-02-13: The WebSDR has been installed in a new location.
Every day between 15:00 - 15:20 CET the internet connection is restarted.
If you don't hear anything, probably Java is disabled or its version is too old (i.e., pre-1.4.2) or your browser does not support HTML5.
Since April 2018, the Chrome browser is reluctant to play audio on WebSDR sites.
If you use Chrome and have no audio on WebSDR sites, a workaround is to switch off Chrome's new autoplay policy, by typing
chrome://flags/#autoplay-policy in the navigation bar
and changing this setting from Default to No user gesture is required
(and restarting the browser). The Web Audio autoplay policy will be re-enabled in Chrome 71 (December 2018).
Remember: If you don't do something (e.g. retune, adjust bandwidth, volume) this WebSDR will time out after 120 minutes. If it does time out, refresh the browser.
It seems Java is not installed or disabled on your computer. You need to install and/or enable it for this website to work properly.
Since Java version 7u51, Java needs to be enabled separately for each website; see http://websdr.org/java.html for instructions.
Your browser does not seem to support HTML5 WebAudio; please try a recent version of Firefox, Chrome, Opera or Safari; or switch to Java.
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