While testing the newest QDX “Beta 1_06_005″ firmware, I hooked it up to the small/cheap inovato QUADRA  linux box and ran some WSPR on 20 meters.  This is what I got after a few hours with 4 Watts into a dipole (I’m currently in California, a bit north of San Francisco):

I’ve always wanted to visit Ellesmere and South Georgia Islands!

The QUADRA is a nice replacement for the virtually unobtainable Raspberry Pi 3: