There is a lot of mention regarding common mode chokes, RF grounding, copper to aluminum connections, etc. Speaking only of my station, I experienced no similar automatic tuner problems with equipment other than the KAT500. I suspect other ops have similar experiences.

My typical experience using the tuner is QSY - a two second TUNE - and the KAT knows where and what to do. Everything is just fine - until in the middle of the QSO the tuner goes berserk and does a retune (a little noisy). If I talk through it - all will go back to normal in a few seconds. Disconcerting to say the least.

I do not know if this problem is damaging to the KAP500 and/or the KPA500. Hence, I am back to running 100 Watts until this is corrected - changing some coax connections and using the K3's internal tuner. Thus removing the devices from the lineup.

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