Rob,
I do not have the XPA125 so I am answering from what I have read and seen on YouTube videos. The Smoking Ape did a good one on the XPA125.
The XPA125 seems to not put out full power depending on the band. The lower bands should get to 100 w. Once you get above 20m it does not generate a full 100. Also, when going into a dummy load you can ¡°bypass¡± the tuner. That will make a difference as well.
Brian
K0FBS
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Brian
K0FBS
Brian Smith