The KPA500 here produces 13-14 dB gain on most bands. 13 dB is a factor of 20, so 10 watts from the KX3 results in about 200 watts out to the antenna system. Gus Hansen KB0YH On 12/28/2012 9:33 AM, Doug Person wrote: > Can the KX-3 drive the KPA-500 directly? I would think it might result > in 200 to 250 watts out?