Hello Andrew,
Where does Gqrx say it supports "airspy"? The issue is that the Airspy hardware is usually supported via the osmocom plugin support within GnuRadio. It's also possible you might be getting support via the SoapyOsmo plugin but that's not very common from what I've observed. When I start gqrx, I see the following:
--
$ gqrx
linux; GNU C++ version 4.4.7 20120313 (Red Hat 4.4.7-4); Boost_105400; UHD_003.005.003-0-unknown
failed to get the current screen resources
gr-osmosdr v0.1.x-xxx-xunknown (0.1.5git) gnuradio 3.7.9.2
built-in source types: file fcd rtl rtl_tcp uhd rfspace
airspy redpitaya <------------------
Using Volk machine: avx_64_mmx_orc
BookmarksFile is /home/dranch/.config/gqrx/bookmarks.csv
gr-osmosdr v0.1.x-xxx-xunknown (0.1.5git) gnuradio 3.7.9.2
built-in source types: file fcd rtl rtl_tcp uhd rfspace airspy redpitaya
--
If you don't see the word "airspy" when you start gqrx from the command line, you'll have to recompile GnuRadio and the related plugins yourself. This is mentioned in my document.
--David
KI6ZHD