For about the same cost as of case of PBR, you can buy a cheap software defined radio called the RTL-SDR. With this simple USB dongle, you can turn your PC into a wideband radio scanner and use it to sniff out RF signals anywhere from 25 MHz to 1700 MHz. In case you’re not familiar, an SDR receiver works a lot like a traditional radio transceiver, except that most, if not all, of the signal processing that would normally happen in hardware, is done with software instead. Essentially, an SDR receiver captures the raw radio signals (using a tuner), Continue Reading