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A couple years ago I had a couple months fun making several hundred JT65 contacts via HF.   It was a fun challenge and I love QRP modes anyway.  As I'm "back into HF" and other things now I revisited JT65, and found that the JT9 software has matured as well.    The last time I tried it the software was clunky and I didn't find any sigs.

Well today, it seems both are better.  I found sigs and good software, in the form of WSJT-X.


The JT9 signal is designed for HF, and boasts the ability to copy 2db deeper into the noise while being about 5 times narrower in bandwidth.  Well I'm not sure about the noise boast, but it surely is narrower as the image below shows.


I'll be on JT65 and JT9 modes off and on, between DSSTV and other fun modes.

 [Update] JT9 pulled out a signal that I couldn't see a trace of in the waterfall.  It was on the end of a qso that had already been established, and it pulled out the 73 that I couldn't see in the waterfall, let alone hear.