Pebble HF: The $50 Open-Source QRP Transceiver That Wants to Get You on HF

Pebble HF is an open-source, single-band 20m QRP transceiver built by the Ham Radio Duo — Becky (N4BKY) and Mike (N4FFF) — in collaboration with Barb (WB2CBA), who did the hardware design, and Guido (PE1NNZ), whose uSDX firmware forms the software backbone.