Look at the actual voltage into the KXPA100 during transmit. This can happen if the voltage is below 13.8-14. I had to adjust my Astron 35 amp as at 13.5V I saw almost the same thing. -- View this message in context: http://elecraft.365791.n2.nabble.com/KXPA-Power-Output-tp7616454p7616455.html Sent from the Elecraft mailing list archive at Nabble.com.