Top Ten: Democratic Open Source SDR and Amateur Radio Applications That Matter Today

The talk sets out to identify the most important open source software-defined radio (SDR) and amateur radio projects without relying on the presenter's own bias. Instead, it uses GitHub star counts across several search terms, including SDR, software defined radio, amateur radio and ham radio. The presenter introduces a "velocity" measure that divides a project's stars by its age, which surfaces newer or fast-growing tools that raw totals hide. The method is also explained as a way to spot trends in any open source field.

The middle of the talk walks through the leading projects. These include a logging application forked from an earlier amateur radio logbook, a satellite telemetry toolkit built on GNU Radio, and a low-cost transmitter board designed to pair with a Raspberry Pi. Receiver software such as GQRX and SDR++ is covered, along with Universal Radio Hacker for analysing and replaying radio signals. Hardware projects include an open source handheld transceiver that connects to a phone over USB-C, a cable that adds sound and keying to inexpensive radios, and the HackRF platform with its upcoming Pro revision and portable firmware. The presenter also notes that a project's update pattern and age can mislead star-based rankings.

The closing advice is to vary search terms, avoid judging projects by stars alone, and test these tools on cheap hardware. Attendees are encouraged to meet others in the field, and the presenter points to a related hands-on workshop and an RF village demonstration at the conference.