I've tried ALT, that did not improve the match on 20m and 15m. I have also very critically examined and re-flowed some solder joints without improved results. I can't identify by inspection any problems with the capacitors and inductors on the LC board.
I do have a high quality antenna analyzer, a RigExpert AA230Pro, used to obtain the antenna figures in the second chart in my original post. I've also attached that analyzer to the antenna port of the KAT2, and activating each of the inductors and capacitors noted a change in the impedance with each change, but I did not look at this in a quantitative fashion. Don, is there a regular procedure for using the antenna analyzer to analyzer the KAT2? Thanks, Chip AE5KA On Sun, Aug 21, 2011 at 7:35 PM, Don Wilhelm <w3...@embarqmail.com> wrote: > Fred, > > I do not know what the algorithm is (that is a question for Wayne), but > what I do know is that in the KAT2, there are 2 levels - the normal > algorithm which is fast to find a match, and the ALT which is slower, > but will often find a match in difficult times. > > 73, > Don W3FPR > > On 8/21/2011 7:24 PM, Fred Jensen wrote: > > I would suspect Chip has some sort of problem Don, my KAT2 has never > > failed to get a match to anything conductive :-). Actually, it won't > > load an end-fed half-wave on 40, but does with a 1.3:1 SWR on 20. Go > > figure. > > > > Just out of curiosity, is the KAT2 some sort of steepest descent > > algorithm? ... or maybe that's proprietary. At any rate, both my KX1 > > and KAT2 ATU's really do work. > > > > Fred K6DGW > > Auburn CA > > > > On 8/21/2011 4:06 PM, Don Wilhelm wrote: > >> Chip, > >> > >> The KAT2 and the KX1 use a similar tuning algorithm, it searches for the > >> lowest SWR - but the KX1 capacitor and inductor selections are much more > >> limited than those of the KAT2. I am surprised that the KX1 gives you a > >> match, but the KAT2 cannot handle the same antenna. > > ______________________________________________________________ > > 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 > > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
