I use 5-10 watts without any issues. 3-4 bars on the ALC. 73! Tom - KB2SMS KX2 #01927 On 10/26/2017 07:50 AM, Barry N1EU wrote: > What is the recommended max power output setting for the KX2 and for the > KX3 for normal FT8 use without after-market heatsink? > > Thanks & 73, > Barry N1EU >