I'm one of the Linux user of TQSL, it's annoying to compile the new versions every time.
And the kamal ppa is not working any more, I called to the tqsl support team to test my appimage build script to generate the equivalent of a ".exe" file on linux.
There's no need to compile it anymore, just download it, tag it as executable and run it.
You can see more details in the tweet below I will be happy to help or sort any issues of the generation of a AppImage version of TQSL
Cheers, Pavel CO7WT