With the KPA3 in NOR, I find the ATU TUNE power to be 5.0 watts. With the KPA3 in BYP, I find the ATU TUNE power to also be 5.0 watts. Now with the TUNE PWR set to NOR, I find the ATU TUNE power to be 10 watts.
See page 174 in the Fred Cady manual, TUN PWR
73
Bob, K4TAX