[Elecraft] SWR Increases

[Patrick DalPorto]

I have a K2/KPA-100 and the tuner also.  I have recently tried 160 M. and noticed  that as I operate and the rig heats up from transmitting the SWR begins to increase after the fan has been on for a while.  I have not noticed this before.  Anyone else observe this?  
I made sure the tpa was set correctly.  I recently had the KPA -100 apart and installed new thermal pads.  I wonder if the finals are getting too hot?  SWR comes down as the rig cools again.

I have not retightened the screws on the finals but am going to do that after I send this note.

Any suggestions?

Pat W8FV/5H9PD