Getting Started With Software Defined Radio (SDR)

Not long ago, enthusiasts with an urge to listen to radio broadcasts had to make hard choices about what equipment to buy based on their interests. “Multi-band” radios provided circuitry for a selected set of frequencies, usually requiring crystals specific to each band. A basic one might receive AM, FM, shortwave, and NOAA weather radio; for more than that, you’d be looking at serious cash.