Hi Bob, The K3s, KX3, and KX2 use a similar ALC power control design.
John KN5L On 06/17/2018 07:47 AM, Bob McGraw K4TAX wrote: > I've noticed a bit of the same thing on my K3S. Not an issue but I > view as a nice safety feature preventing overshoot and over drive of my > KPA500. > > 73 > > Bob, K4TAX > > On 6/17/2018 7:07 AM, John Oppenheimer wrote: >> Hi Martin, >> >> The power ramp up is normal behavior. The K2 uses requested power >> control (Page 92, "Requested vs. Actual Power:" paragraph) >> >> With a per band set value (Page 111, "Microcontroller" paragraph, "ALC, >> which is used on CW to maintain the user-specified power level across >> all bands.") >> >> When changing bands, the output power is sampled by the microcontroller >> resulting with a change in the transmitter ALC to increase power. The >> ALC action requires a few dits or TUNE to complete. >> >> John KN5L K2 #7212 >> >> On 06/17/2018 01:43 AM, Martin Sole wrote: >>> After a band change the first dit, or two, is not at full power. >>> There seems to be an initial ramp up after which all is good and I don't >>> see any fluctuation in power. Supply is 13.5 volts when producing full >>> power, about 13.9 with just the receiver running. Full power current on >>> 28Mhz is showing on the display as 2.66A. I can see the ramp up on the >>> bar graph, it shows one bar for the first 3-4 dots then ramps up to all >>> 10 bars. I have confirmed the same with an external power meter. >>> Anything I can do about this? ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
