Posted by n4cc on Aug 25, 2019; 12:43am URL: http://elecraft.85.s1.nabble.com/KPA-1500-Power-Output-Variation-tp7654657p7654675.html
Why worry about it? No one on the other end would be able to tell one bit
of difference. I see power drop -- maybe 5 - 10 percent -- as the KPA1500
heats up...likely normal. The small bit of reflected power may also have
some minor effect on the wattmeter readings you see as well. 73, Greg-N4CC