[Elecraft] KPA 1500 efficiency

[Howard Sherer]

Reading the display on the KPA 1500 at various RF output levels shows an
efficiency as follows on 40M into a dummyload:


300W   23%
500W   27%
1000W  42%
1300W  48%
1500W  52%
1600W  54%

Have other owners seen results like this? Do you think a firmware and menu
item could be developed to increase the amps efficiency at lower power
levels by lowering the voltage to the PA?