I am using an early KAT500 with a K3S. When using WSPR in band-hopping mode at 5w, WSJT-X 2.0 commands a band change and transmit, the K3S starts transmitting, then stops, changes bands, then changes back to the original band, say 40 meters. I think this part is a WSJT problem, and has been reported. Now the K3 is on 40m. If I press the TUNE button in WSPR, the SWR meter shows a high SWR and relays click in the KAT500. If I press TUNE again, the swr is good. The KAT500 is configured to follow the K3 vfo, so why is the KAT500 retuning? If the K3 shows 40m, why wouldn't the KAT500 have the proper tuning solution? It is properly cabled with auxbus cables between the K3, KAT500, and KPA500 in that order (the KPA500 is off). The KAT3 is in bypass mode. I don't think this is an rf problem because I regularly use the KPA500 with no signs of rf getting into anything. This seems very odd. All firmware is current. Any ideas? 73 Eric WD6DBM
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