Yes, it's the PA kicking in; here's a small study I did earlier this year: http://w9xc.net/articles/k3-measured-power-consumption.html
Other than the bump at the PA transition, the power increase per output watt seems pretty linear. The interesting implications come when running from an energy-limited source like batteries: how much power cost (operating time penalty) do you want to pay per dB increase in signal? - Les, W9XC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html

