On Tue, 12 May 2020 at 11:51, Joe Subich, W4TV <[email protected]> wrote:
> > > So I guess the question is this: is it expected to see such a large > > variance in power consumption for the same output power based on the > > values of C and L for the KAT3A? > Is the KAT3/KAT3A *tuned correctly*? > This came up because the rig is drawing a lot more current on 20m vs 40m, when the KAT3A is tuned for the antenna (which is a better match on 20 than on 40). For the dummy load, no, the KAT3A won't be tuned correctly when I manually choose values for C and L; I just used it as a way to better characterize the nature of the behavior that I was seeing and to reduce the number of variables. However, as I mentioned, the behavior is similar when running FT8 with the tuner correctly tuned for the antenna. If memory serves, the difference in current draw was something like 6 amps between 40 and 20, though I can go measure that again if an exact value is useful. You are comparing apples and oranges here. At 12W the 100 W amplifier > is bypassed. At 13W the 100W amplifier is engaged. The differene you > see is due to the 100W amplifier. > I'm not talking about the difference in measurements in the chart vertically; I'm talking about the difference horzontally. I did the measurements twice deliberately, specifically because PA is bypassed/engaged, because I wanted to see if there was any relationship there as well. Nick -- *N6OL* Saying something doesn't make it true. Belief in something doesn't make it real. And if you have to lie to support a position, that position is not worth supporting. ______________________________________________________________ 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 Message delivered to [email protected]
