VERON Amateur radio club ETGD
PI4THT		 Faculty for Electrical Engineering, Mathematics and Computer Science UT
WebSDR on eight bands

On this page you can listen to and control a short-wave receiver located at the amateur radio club ETGD at the University of Twente. In contrast to other web-controlled receivers, this receiver can be tuned by multiple users simultaneously, thanks to the use of Software-Defined Radio.

Note that the setup is rather experimental, and neither continuous service nor good performance are guaranteed.

Comments are welcome; they can be mailed to PA3FWM and/or typed into the "chatbox" at the bottom of this page.

Note: you need both Java and JavaScript enabled for this page to work properly. If you don't hear anything, probably Java is disabled in your browser's settings, is not installed at all, is a too old version, or is not functioning properly.

More WebSDRs can be found via http://www.websdr.org.

News 5 August: We replaced the two computers that were running websdr.org and websdr.ewi.utwente.nl by a single one (as was also the configuration before we changed from 3 to 7 bands). This saves energy, makes maintenance easier, and opens up possibilities for future extensions.
Unfortunately, it seems there are still some problems with the new server, leading to interruptions and/or extra noise in the reception. I'll try to fix those tomorrow. Expect occasional interruptions and outages while I'm trying to debug this problem.

Update 6 August: The problem has been solved. We had installed a rather old type of ethernet card in the new computer for its internet connection, and apparently this card needed much more CPU cycles than a newer type. Replacing the card fixed it.

8 August: The server was off-line for almost a day: the SDR board started to emit garbage data (perhaps after a power glitch?), which could only be fixed by going there and physically resetting it.

11 August: A segment of the 15 m band has been added, as an experiment. Note though that the receiver board is probably not sensitive enough on this band; a pre-amp would be needed.
12 August: the spurious signal in the middle of each band has been removed.


Frequency:


Or tune by clicking/dragging on the frequency scale.
Bandwidth:
? kHz @ -6dB; ? kHz @ -60dB.
Or drag the passband edges on the frequency scale.
Waterfall settings:
Speed:
slow
medium
fast 		Size:
small
medium
large 		View:
spectrum
waterfall
weak sigs
strong sigs
almost freeze all but one


[scale]
? dB; peak ? dB;
Logbook:
(The LOGbook is NOT a GUESTbook!)
Call of station that you hear:
Comments about what you hear:
Once again: the LOGbook is NOT a GUESTbook!
Please only enter stations that you hear via this system.

Note: time, frequency, your name/call, and DXCC information are added automatically.
To view the logbook, click here (ctrl-click for new tab/window).

This WebSDR is currently being used by ? user(s) simultaneously:

Chatbox:
This chatbox is intended to discuss the operation of the WebSDR. Please keep the discussion civil and polite. No advertisements; no political or religious statements; no name-calling or slander!
The operators of this site disclaim any responsibility for text appearing in this chatbox.



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