I've been wondering if anyone else has experienced this. I have a K1 with the KAT1 ATU and am using an A/B switch to swap antennas. Three times now when I swap antennas with the power on the K1, it shorts out diode D19 in the final. I can solve the problem by always powering down before the swap, but sometimes I forget to do that (has nothing do with my age. HI).

Any thoughts?

73, Jim W5LA

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