On 3/23/2011 7:12 AM, Johnny Siu wrote: > When I use K3 for PACTOR III, I need > to low the power to say 30W. The K3 is rated for 100W in keydown modes for several minutes. In RTTY contests where the rules require 100W max, I run it at 100W and the temperature stays well within safe limits. 73, Jim K9YC