70cm/430MHz accesspoint for HamNet and more

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This project is a 70cm (430-440 MHz) modem with an ethernet interface and two si4463 radios. The project has multiple uses:
-hamnet access point for long range links
-freedv based base station controller
-low cost satellite ground station

The board runs the NuttX RTOS.

One of the important goals of this project is the development of a fully opensource driver for the si4463 radio chip, that would not need any input from the silabs modem calculator.

The OS is BSD licensed
The schematic is open hardware under the CERN OHL
The PCB design is restricted (at least for the moment).

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