Now that I'm getting good at hauling wires up to the tops of trees I've hammered in a ground stake and raised a wire vertical high into my antenna tree. This makes an excellent broadband receive antenna.
I'm loving SDR++ and it works brilliantly with an AirSpy HF+ (I recommend the nightly builds). Recently I decided to wipe the shack Linux laptop and have switched over to Ubuntu Mate Linux. To get the AirSpy going I was pleased to see that I simply needed to do:
sudo apt install airspyhf
This is a much better experience than all the messing around with an SDRPlay device.