When cheap digital TV dongles enabled radio enthusiasts to set up software defined radio (SDR) systems at almost zero cost, it caused a revolution in the amateur radio world: now anyone could tune ...

Ham radio is no different ... HF radios are a different story. Thanks to software-defined radio, superpowerful computers, and FPGAs, even relatively inexpensive HF radios have features that ...

A century-old technology has been added to Petersburg's fire hall for emergency communication when all else fails. Amateur ...