Definitely the first step is to get a cheap USB dongle. There is a RTL-SDR compatibility list[0] that you may find useful. Once you play with a cheap one you'll

Definitely the first step is to get a cheap USB dongle. There is a RTL-SDR compatibility list[0] that you may find useful. Once you play with a cheap one you'll have a better idea of the parameters you can improve by upgrading to more sophisticated/expensive hardware. 0: https://www.reddit.com/r/RTLSDR/wiki/compatibility https://www.reddit.com/r/RTLSDR/wiki/compatibility