The RTL-SDR is a ton of fun! I built a small ADS-B Antenna out of Coaxial cable and even inside my Seattle apartment, I can track planes ~150 miles away. You

The RTL-SDR is a ton of fun! I built a small ADS-B Antenna out of Coaxial cable and even inside my Seattle apartment, I can track planes ~150 miles away. You can also tap into trunking systems and decode NOAA weather satellite images.