I have a frequent incidence of Fault 6 Excess power tripping. This seems to occur only on 80m. I have the K3 and KPA500 linked with the AUX cable. I get the trip even if the K3 output is zero! If I unplug the AUX cable then the KPA500 works perfectly on all bands. Any ideas as to why this happens? 73 Bob G3PJT Sent by Ipad