A couple of constructors have been busy pushing the limits …
Digital modes µBITx in a box
Felice IK1ZVJ project stems from his passion for digital modes. He says “The union between µbitx and raspberry works well”. Felice combines a µBITx with a raspberry pi and a large pop-out screen in a single portable package for use with digital modes such as FT8.
The LCD screen is mounted on an old CD mechanism to provide automatic ejection from the enclosure.
The project includes a dual power supply with a built-in power supply and battery power for portable use. He foresees his pr ubitx, only being used with the raspberry pi on digital modes. The raspberry pi is loaded with WSTJ-x for use on the FT8 and FT4 modes, and for FL-DIGI for PSK and RTTY. His enclosure uses a 3U rack (9 cmx40cmx43cm).
Ashhar Farhan is pushing the boundaries
Ashhar Farhan VU2ESE, designer of the µBITx previewed a Raspberry Pi board for HF radios with a high end codec at the FDIM (prior to Dayton Hamfest 2019).
This is for a new radio that he is building to push the limits of what his homelab capability can produce.
The story so far is that there is a very low noise 24 bit codec on a custom board that plugs into the raspberry pi. The display is a 7 inch capacitive touch screen device.
The radio is a single conversion, very low distortion superhet without any amplification before the crystal filter and triple tuned filters for each band.
Ashhar says “Nothing is casual about this radio. Even the power supply had to be included to have low noise rating.”