> Just wondering--is it necessary to change some settings inside the K2 when > you add the Elecraft external tuner? Or does the tuner automatically > recognise ... If you have the KIO2 or KPA100 (you must have one of these installed in your K2 to use the external KAT100), then the K2 autmatically recognizes the tuner when it is connected to the radio. 73, Lyle KK7P