The only experience I have is with the AH-4 connected to an ICOM radio. 73 Bob, K4TAX K3S s/n 10163 On 10/19/2015 9:42 PM, johnpierce wrote: > Does anyone have information about how to use an ICOM AH4 antenna tuner with > a K3s. I have one that is in a remote location, so getting the K3s ATU will > not help me. > > > > John, AD2F