Gqrx 2.6 released

I am happy to announce that Gqrx 2.6 has now been released and ready for download. As promised, this release includes experimental binaries for the Raspberry Pi 2 and 3.

Thanks to everybody who contributed to making this release happen!

Gqrx with Funcube Dongle running on the Raspberry Pi 3

New features

  • 1-2-5 scaling on FFT axis.
  • Audio waterfall.
  • Remember AGC settings between sessions.
  • Right-click on FFT resets frequency zoom.
  • Separate dB ranges for pandapter and waterfall.
  • Raw I/Q mode.
  • Portaudio support.
  • Command line option to set Qt style (fusion, windows, …)
  • Binary packages for Raspberry Pi 2 and 3.

Bugs fixed

  • Stuttering audio with Pulseaudio backend.
  • Use system font on FFT plot (too small font on high res displays).
  • Broken FUNcube Dongle Pro+ support on Mac OS X 10.11.4.
  • Correct display of negative offsets between -1 and 0 kHz.
  • Reset frequency digits below the one that is being changed.
  • LNB LO could not be set from I/O configuration dialog.
  • Update squelch level when switching between demodulators.
  • Set correct filter range when loading bookmark.
  • White area on waterfall.
  • RFSpace Cloud-IQ support on Mac OS X, RPI binaries and in PPA.

Miscellaneous improvements

  • Input decimator performance.
  • SDRPlay integration through SoapySDR.
  • Only probe for devices when the program is started.
  • Allow user to enter ALSA device name.
  • Set default audio FFT range to -70…0 dB.
  • Restore audio FFT dB scaling between sessions.

The download page and the Ubuntu PPA have already been updated with the new source packages and binaries for the Raspberry Pi 2 and 3. Mac OS X users will have to wait a few more days for and App bundle.

As mentioned in the release notes, we have fixed RFSpace Cloud-IQ support in gr-osmosdr and Gqrx can now work reliably with the Cloud-IQ. The patches are integrated into the Raspberry Pi binaries but not yet in the Ubuntu PPA. I anticipate a PPA update during next week that will include both the RFSpace fixes and some Airpsy improvements.

I hope you will enjoy this new version of Gqrx and stay tuned for exciting new developments in the embedded single board computer area in the foreseeable future.

Let us know what you think!


Author: Alexandru Csete

Embedded software engineer in the satcom industry during the day. Radio amateur and SDR hacker during the night.

  • Elmer Fudd

    I downloaded and ran this version on Win-10 today. It looks pretty cool. But the Qt5 look even on a Rasberry-Pi looks better than on Windows!? I’d imagine it would the other way around.

    Another thing, it seems I get much better reception using SDR-Sharp on my RTL-SDR…

    • Gqrx should look like a native application on all platforms. If it doesn’t some theme-related stuff could be missing from the package. I really don’t get it why anyone would want to run gqrx on windows; there is already plenty of good SDR packages on windows and the whole point with gqrx was to also have a good SDR on linux and mac.

  • Apostolos Kefalas

    Hello Alex,

    after upgrading to 2.6 version wxtoimg is “complaining” about Narrow IF bandwidth (purchase upgrade key!), low S/N, or volume too high

    What has changed since 2.5 that could affect NOAA recording/decoding ???


    • Hi Apostolos,

      You can see the list of changes above and I don’t know what could cause this. If you are sure your settings are correct (filter width and deviation), feel free to open an issue an github so I can take a look at it later: . I am in the middle of moving right now and wont have time to look at it until next year, sorry.


      • Apostolos Kefalas

        I am pretty sure that everything is correct (filter 40KHz) and Max dev (APT). Although now I saw that the max deviation is 25Khz instead of 17Khz that was with Gqrx 2.5. I don’t know if that is the problem.

        • Max dev should be 17 kHz and filter at least 50 kHz wide to allow for some margin.

  • thecuriousauditor

    Hi I’ve got a classic error. Gnutls: Error in Pull function. Unable to establish SSL connection. All certificates and date o my pi are updated :(. Help