[Elecraft] KAT500 autotuner odd operation

[dave ingebright]

I have a KAT 500 Autotuner and its been acting oddly for the last few weeks. I am using it connected to three antennas and it will not tune the antenna in the #3 socket. During troubleshooting, I have hooked it to a dummy load, with new coax and it says high SWR. Tuning on the other antennas seems to be suboptimal. It has intermittant high SWR on the other antenna outputs but now #3 seems to always show high SWR. Has anyone seen this or has any ideas? I am running it with a KPA 500, but never over 250 watts. The antenna is a G5RV. The antenna matches OK using the internal FlexRadio 6400 tuner...
//dave
WB7ELY