Hi Group,
Have ordered NanoPi Fire 3, looking forward to its arrival in a month or so ...? Meanwhile, I have tested earlier versions of Raspbian and,? for some reason (corrupted .img-file ?), Jessie (2017-07-05-raspbian-jessie) refused to install despite a number of downloads and trials. Yesterday I succeeded in installing version Reach (2018-06-27-raspbian-stretch) which seems to work OK. Both Quisk and WSJT-X are running flawlessly, without signs of overloading the OS or the power supply. I guess the version Buster I tried at first is intended more for the RPi4 and thus requires a better processor with more RAM.
73 de Heikki (OH2LZI)?