Can the K2 handle tuning into an open antenna? I do not know if this procedure is within the design specification. The power is automatically reduced for tuning. But my K2 as survived doing this quite a few times. It may give a high current warning. If so stop tuning and figure it out. It is probably not good for the relay contacts if nothing else. I recommend the use of a dummy load. Aloha, John KH7T