The KAT100 & KPA100 work only with the K2, Doug. 73, Phil W7OX On 9/10/15 7:14 PM, Doug Hensley wrote: > I'm new to Elecraft but I thought the KAT-100 in the EC1 slim line enclosure could be used as a versatile antenna tuner for the different Elecraft transceivers and most 100 watt radios. > Am I wrong ? > > Doug W5JV