Hi, Joel! If you "train" the KAT500 with your resonant antennas, it should discover and store the "bypassed" ATU setting. Even though the MODE LED says "MAN", the ATU settings stored are the "bypassed" settings. You can see this in the KAT500 Operate page - Try "ATU TUNE" for your resonant antenna. It should discover that the best setting for this antenna is "bypassed".
On some bands (my 20 meter beam), I end up with "bypassed" at the CW end of the band, but up in the phone band the ATU provides a little help. But I don't want to have to manually choose between BYP and MAN for different band segments. The ATU training session provides matching reactances when needed, and ATU BYP when not needed. The ATU stays in mode MAN. The same concept applies if you choose an antenna that never needs help. Erase memories on that band/antenna combination, do an ATU TUNE at three point s in the band, then you'll get that same setting in intermediate frequencies. You can choose with the "BYPASS SWR THRESHOLD" what SWR the ATU should use when deciding whether to use "bypassed" or apply reactances. Some really want to see 1:1 when possible, others think that 1.2 is better bypassed than with any real or perceived ATU losses. The ATU relay settings with the ATU BYP and when in mode MAN or AUTO and the ATU discovers the "bypassed" setting in a tune are identical. It's a real bypass relay pair at either end of the ATU. 73 de Dick, K6KR -----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of Joel Hallas Sent: Sunday, July 1, 2018 14:10 To: elecraft@mailman.qth.net Subject: [Elecraft] KAT500 Antenna Memories I don't think my KAT500 (FW 01.75) is old enuf to suffer from the kind of memory problems I have, but it doesn't seem to do what I expect it to do. I was just changing my antenna lineup and I have three antennas connected to the rear: Ant 1 -- a 17/12 m coupled resonator dipole -- wants to be in bypass mode Ant 2 -- a 20/15/10 tribander with 6 m 3el coupled resonator -- wants to be in bypass mode Ant 3 -- an 80 CF-zepp -- wants to be in auto mode and used on 160, 80, 60, 40 and 30 meters Each antenna wants to be the default on the bands shown, although Ant 3 can be used on all bands, I can change manually if needed. I can cause the tuner to remember to change antennas as I change bands, but it won't seem to remember whether to be in auto or bypass mode as the band changes. This is the case whether I just set it and use it on the bands, or if I try using the config program (1.16.7.25) to force it. I don't think I'm asking it to do more than it should -- am I missing a crucial step or setting? Joel Hallas, W1ZR Westport, CT ______________________________________________________________ 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 d...@elecraft.com ______________________________________________________________ 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
