Thank you for information. If I first tune 1810 kHz then 1820 kHz and so on... It tunes very well 1.0 to 1 rather wide band because impedance is near 50 ohm in 1810 kHz. But, if I tune first 1870 then 1860.... It doesn't tune very well because first trying was bad. I think that problem is in software not hardware.
juha - oh6os 2010/11/1 Poul Erik Karlshøj (PKA) <[email protected]> > > Hi > I have the same problem, but with a twist to it. I even got Elecraft to > send me a replacement KAT3, but it did not help anything. > > By chance I tried one of the older configurations (call it config B) and > then all of a sudden the ATU worked excellent (able to tune a 80m loop and a > 17m dipole on all bands from 80m thru 10m ... Yes even the dipole!... Both > antennas use 450 ohm ladder and 4:1 baluns. By the way, now the ATU works > better than ever before. It never before was able to tune the 17m dipole on > 30m, 40m or 80m - but now it is! > > BUT now with config B something weird happens when the rig is switched ON. > The TX symbol flashes like in test mode, but there is no audio and the TX > LED goes on when keyed. I have not found any other way to get out of that > mode than to make the EE Init reset. Having done the EE Init I can only make > the rig "see" the KPA3 and the KAT3 by loading a config file. > > If I try manually to use CONFIG to select ATU Auto I hear relays clicking, > when selecting KPA3 I dont hear any fans going in the fan test and leaving > the KPA3 in norm and leaving the CONFIG it seems that the rig doesn't see > either KAT3 or KPA3. As soon as I load config B all works again and the ATU > too ... Until next time I switch ON the rig. Then it needs another EE Init > and config load. > > If I load config A the ATU doesn't work, but now the rig can be switched > OFF and ON without problems. > > I can not see any difference between config A and B and I don't know why > the rig configuration should influence the functioning of the ATU. Also my > K2 works fb with its ATU. So the problem is not in the hardware or antenna, > but something else. > > Elecraft is looking into it. > > OZ4UN > Poul-Erik > > -----Oprindelig meddelelse----- > Fra: [email protected] [mailto: > [email protected]] På vegne af Juha - oh6os > Sendt: 31. oktober 2010 19:32 > Til: [email protected] > Emne: [Elecraft] KAT3 don't tune > > > Hello, > > I have worked CQWW SSB this weekend and noted that kat3 don't tune > correctly. > > Many times after tuning SWR is 1.2 or 1.3 even there is no more swr on > antenna. > > I have dipole on 160 meter and swr is under 3 to1 on band, but kat3 try and > try long time and leave it 1.8 if at all. > > My K2 with KAT100 work correctly with these same antennas. > > What is the problem? > > juha - oh6os > K2 #4781 > K3 #2100 > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KAT3-don-t-tune-tp5691912p5691912.html > Sent from the [K3] mailing list archive at Nabble.com. > ______________________________________________________________ > 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 > ______________________________________________________________ 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
