My K3S has a bit of a slow power rise after any power change. I wouldn't say it takes a minute, but I was told this occurs as the power management system makes adjustments. This is done in order to prevent ALC overshoot.
With the ATU bypassed I have my TUNE power set to 20 watts. That is adequate for my KAT500 and drives my KPA500 to rated output. I don't think this affects the K3S ATU tune power. 73 Bob, K4TAX Sent from my iPhone > On Nov 30, 2019, at 2:01 PM, Clark Macaulay <clark.macau...@gmail.com> wrote: > > Jim, > > Your unit is about the same age as mine (#3645) which was sent to Elecraft > a few months ago for what I thought would be installation of some upgrades > I couldn't do myself. Turns out they found (and fixed) several items > including two resistors in the LPA that appeared burned and were replaced > with "more robust components". Your problem sounds similar to what I had > seen but not as severe. > > My K3 came back acting like a new puppy. I'm not saying yours needs to be > sent in; just wanted to share what my experience with a similar s/n rig had > been. > > Cheers, > > Clark, WU4B > >> On Sat, Nov 30, 2019 at 1:26 PM Jim Kennedy <kenned...@cableone.net> wrote: >> >> Fired up my K3 the last couple of mornings and noticed this. As the >> autotuner was searching for a solution the power output was slowing rising. >> Not so unusual right . But, after the tuner made a match the K3 was reading >> about 40w of output. I went into tune mode again (key down), the antenna >> was matched 1:1 but the output was slowly coming up so I let it continue. A >> slow climb to full output after about a minute or so was achieved. I have >> eliminated the tuner as the problem by using it on another transceiver. I'm >> thinking it may be a heat related issue somewhere, my guess is it's >> possibly on the PA board and possibly a solder problem, but then again it >> could be that same issue anywhere in the drive chain. If I don't transmit >> for a period of time it will repeat but not as bad as from a cold start. No >> other abnormal behavior has been noted. Any ideas ? Thanks in advance. >> Serial # 3378 >> >> Jim >> W7OUU >> >> >> ______________________________________________________________ >> 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 clark.macau...@gmail.com >> > > > -- > 73, > > Clark, WU4B > QRPARCI #10815 > SKCC #3892 > NAQCC #5055 > CWOPS #1869 > Collins Collectors #AC90-12432 > Southeastern DX Club <http://www.sedxc.org> > North Georgia QRP Club <http://www.nogaqrp.org> > > > *"It is vain to do with more what can be done with less."* > *Attributed to *William of Occam (1288 AD - 1348 AD) > ______________________________________________________________ > 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 rmcg...@blomand.net > ______________________________________________________________ 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
