The dreaded K3 'zipper while tuning' appeared suddenly yesterday in the middle of the CQ VHF contest. I've had #1823 since 2008, and never had (heard?) it before, so I didn't pay attention to the comments and 'cures' for it. Silly me. Can someone pse point me in the direction of a fix? Nothing in Fred's book about it. Ralph, VE7XF