After this past weekend's ARRL VHF contest, one of the top SOHP scorers, Mike, W3IP, posted a note to the PVRC reflector along with the breakdown of his score. In his comments he compared the FT8 sensitivity of WSJT-X vs JTDX. Mike is a technically sharp guy and I trust what he has reported. Here is what W3IP wrote:
*"When operating on FT8, I ran WSJT-X and JTDX in parallel. The JTDX decode capability on weak signals is significantly better - but JTDX doesn't recognize contest mode. I had several contacts that decoded only on JTDX so I had to manually advance the transmit side exchange on WSJT-X each time. I had only one occasion when I decoded a wanted signal in WSJT-X only. What a pain!"* I wonder what might explain the better performance of JTDX over WSJT-X on weak signals and if something can be done so WSJT-X can match the weak signal performance of JTDX. I used WSJT-X v2.5.0-rc5 in the VHF contest on 6M & 2M and it performed well for me on FT8. I haven't yet compared WSJT-X at my QTH with JTDX. 73, Rich - K1HTV
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