An ingenious idea but I think there is a flaw in the argument, in that at the position of the K3's ATU there will be a different impedance to match than is the case at the KAT500's position further along the line. Not only will the impedance move around the Smith Chart a bit but there is also the input impedance of the KPA500 to consider. Maybe in practice all of the above may have a negligible effect, but I somehow doubt it.
73 Stephen G4SJP On 23 February 2014 12:58, Poul Erik Karlshøj (PKA) <p...@telepost.gl> wrote: > KAT 01.58 is working nicely. But still, if Your antennas are changing > impedance as the WX changes (which I can confirm is the case when antennas > are mounted in or very close to trees :-) You are going to hear these > sometimes lengthy clickety-clack. Even when making two configurations (one > for dry and one for wet WX) You have all "shades" in between, so once in a > while You are going to have the relays going crazy again. At least it > happens to me. > This made me think if it might be avoided keeping in mind that the K3 ATU > does the tuning a lot less noisy. > > I think others have suggested a firmware change making autotune of KAT500 > initiate from the K3. This may be an interesting way to get rid of the > clickety-clack of the KAT500 if done as follows when selecting TUNE on the > K3 (new mode: KAT500): > - KAT500 enter bypass (KPA enters STBY) and K3 performs the autotune > - K3 ATU config transfers to KAT500 > - K3 ATU changes to BYPASS > - KAT500 changes to MANUAL > if the cables from K3 to KPA are not so good it may be that the KAT needs > to fine tune. So a fine tune of the KAT might be a good idea. > > 73/OZ4UN > Poul-Erik > > Sendt fra min iPad > ______________________________________________________________ > 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
