Here at Cross Country Wireless we used to make SDR receivers such as the SDR-4+ and Sentinel series. What isn't well known is that we spent years trying to come up with a design for a SDR transceiver that we could build at a sensible price. As a result we have a lot of circuit designs that never made it into production. The uSDX project uses a masterpiece of DSP processing that fits on a ATMega328P microcontroller by Guido, PE1NNZ Here we have one built on a WB2CBA PCB using a design for a Z match output coupling unit listening to Ian, G0CTO on the 160m Bolton Wireless Club Teatime net.
