Certainly possible, the KPA500 is linear - most report 35 to 40 watts input produces 500 watts out, so on that basis, 10 watts input would produce 125 watts (or more) output. 73, Don W3FPR On 12/29/2011 6:42 PM, Paul Rodbell wrote: > What about the possibility of using the KX3 with my KPA-500? > > Paul > AK4IJ