Hi
I captured the schematics from Ashar Farhans FDIM 2021 presentation "sBITX - An Open-Source SDR the YOU Can Hack!"
So I started hacking!
Attached is a rendering of my Sbitx board. The x-tals, transformers and coils are through hole components and will be mounted on the opposite side of the other components. RF-filter and tx-amplifier will be on another board. In the first setup I will use the lpf and bpf from qrplabs.
Size of the board is 50mm by 80mm.
I will mill and drill the board tomorrow and then begin mounting components.
I use an AudioInjector board that sits on top of a RPi4 and I can see a nice peak on the screen when injecting a tone. So the receive part of the software is working. The setup and compile was very easy.
I haven't tried the transmit part yet.
73 de oz9ny, Niels
