start [rad1o] Welcome to the CCCamp 2015 rad1o Badge Wiki https://rad1o.badge.events.ccc.de/

The rad1o badge contains a full-featured SDR (software defined radio) half-duplex transceiver, operating in a frequency range of about 50 MHz - 4000 MHz,

RTL-SDR and GNU Radio with Realtek RTL2832U [Elonics E4000/Raphael Micro R820T] software defined radio receivers.
http://superkuh.com/rtlsdr.html

GNU Radio http://gnuradio.org/redmine/projects/gnuradio/wiki