Hi Mark,
Try resetting the QCX. You find the reset in the ?other¡° menu point. Use a 50Ohm Dummy load and go through the alignment menu points again. I had a similar problem. Make sure that when under menu point 8.10 that the volume is at 11. Then you minimize the amplitude. This did the trick for me. I could then hear morse code on the frequency.
Pier HB9IIA