uSDXn is an open-source, modular QRP HF transceiver project designed for experimentation, education, and practical development of digital and analog radio techniques.

The project explores a modular approach to the uSDX concept, separating the transceiver into functional building blocks that can be studied, modified, replaced, and developed independently.

The objective is not simply to build another QRP transceiver, but to create an open hardware platform where radio amateurs, students, and experimenters can understand how each section of an HF transceiver works and can easily experiment with different circuit implementations.

The architecture is intended to support interchangeable modules for functions such as frequency generation, RF amplification, filtering, mixing, audio processing, control, display, and other transceiver functions.

All hardware designs are intended to be openly available so that users can study the circuits, manufacture the PCBs, modify the designs, and develop their own versions.

uSDXn is developed as an educational and experimental platform for the amateur radio community, with an emphasis on modularity, accessibility, reproducibility, and open hardware.

License: CERN-OHL-P-2.0 (Permissive Open Hardware License).

Project Resources

The complete project documentation, hardware files, firmware, and development information are available on GitHub:

https://github.com/wj6c/uSDXn

Community discussion, experimentation, troubleshooting, and project updates are available through the uSDX Community Facebook group:

https://www.facebook.com/groups/uSDXQrp