http://forums.qrz.com/showthread.php?369216-Joe-Taylor-K1JT-has-a-new-digital-mode-called-JT9 http://www.amateurradio.com/wsjt-x-for-lf-now-i-really-will-have-to-look-at-a-top-band-antenna/#comment-36058 Download http://physics.princeton.edu/pulsar/K1JT/wsjt.html