Install wsjtx by entering the following commands in the terminal:
sudo apt update sudo apt install wsjtx
Description:
weak-signal amateur radio communications
wsjtx is designed to facilitate Amateur Radio communication under extreme weak-signal conditions using modes JT9 and JT65.
Homepage: http://www.physics.princeton.edu/pulsar/K1JT/wsjtx.html
Version: 1.1.r3496-3.2ubuntu1
Section: universe/hamradio