I have a setup that allows me to key in PSK31 on an FT-840 Yaesu HF radio. I also have a FT-726R Yaesu 2 meter all mode radio - same pinouts on the microphone. However, it doesn't work using the WSJT software on the FT-726R. So, I tried running WSJT on the Yaesu FT-840 HF radio and it worked! Does anyone have an idea what might be going on? :) Thanks! 73 Randy N0LD