None, proceed as instructed in the manual. Make certain the KPA100 is set to use the 40 meter LPF, not the 80 meter when on 60 meters. 73, Don W3FPR On 6/27/2018 1:34 AM, Brian Denley wrote: > Any issues adding this option to a K2/100 set up in the ‘twins’ configuration? ( KPA100 and KAT100 in separate EC2) >