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.
The system is currently composed of a "Mini-Whip" antenna,
a homebuilt SDR board (pictured above; see here for background)
which samples the entire shortwave spectrum and sends all of this via
a gigabit ethernet link to a PC, where a special version of the
WebSDR server software processes it.
The Mini-Whip is based on a design from PA0RDT (google finds it); see
The active receiving element is about 5 by 10 cm large.
Such an antenna only works well with a good grounding;
ours is on top of a 20m high building, the upper part of which is all metal.
Questions and remarks about this WebSDR can be sent to the developer
and maintainer: firstname.lastname@example.org
(but please check the FAQ first).
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.
Bandwidth: ? kHz @ -6dB;
? kHz @ -60dB.
Or drag the passband edges on the frequency scale.
Or use scroll wheel and dragging on waterfall.
Your browser does not seem to support downloading the recording; please try a recent version of Firefox, Chrome or Opera.
This chatbox is intended to discuss the operation of the WebSDR.
Please keep the discussion civil and polite; that also means no swearing ("four-letter words").
The operators of this site disclaim any responsibility for text appearing in this chatbox.
Please keep in mind this chatbox is shared with often hundreds of users;
don't use it for chatter; use it ONLY for messages about the operation
and use of this WebSDR, and about the signals received with it.