Radio receiver with a fun cube dongle pro plus

[PaddyB]

At last! It works, a good few years ago I bought a fun cube dongle pro plus as a little present to the boat, and finally it works on the Pi. 
http://gqrx.dk/download/gqrx-sdr-for-the-raspberry-pi
Download the zip file onto the Pi then in a terminal change directory to where the downloaded file is and run >   tar xvfJ gqrx-sdr-2.11.5-linux-rpi3.tar.xz
Then go into the gqrx directory and run > 
chmod +x gqrx
Then run >  volk_profile
And wait a while, then in the same directory type ./gqrx.
And you should be up and running, with the fft display turned down to 1fps or off audio is largely stutter free. I've a hifiberry amp so can play back over the speakers, listening to the local airport tower this morning. Lots fun :
Also can save to an audio file so you can record weather faxes then open in fldigi to decode into an image. 
Should work with a RTL dongle though haven't tried it yet.