Amateur radio club ETGD PI4THT Faculty for Electrical Engineering, Mathematics and Computer Science Wide-band WebSDR 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. This site, which in 2008 was the very first WebSDR site ever, was finally reactivated in July 2012 after an interruption of more than 1.5 years ; read also the old news since then . 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 processe...