Have you replaced the coax cable between the KPA500 and the KAT500?
Sent from my iPhone > On Jun 2, 2018, at 5:04 PM, jeff griffin <[email protected]> wrote: > > Hi Jack. The swr is so different between the two that there has to be a > problem. I've had this setup for 3 years and never experienced this > behavior. > > 73 Jedff kb2m > > -----Original Message----- > From: Jack Brindle [mailto:[email protected]] > Sent: Saturday, June 2, 2018 4:47 PM > To: jeff griffin > Cc: [email protected] > Subject: Re: [Elecraft] KPA500 and K3 SWR meters disagree > > Jeff; > > Do I understand that for the first test you are driving the antenna through > the KPA500 and KAT500 (with KAT500 in bypass)? If so, it makes a lot of > sense that you will see different SWR. The KPA and KAT are providing a > completely different load for the K3. The better test is to feed the antenna > directly from the K3 without the KPA and KAT in-line. I would expect you to > see a closer match at that point, although I doubt they will ever be > identical due to the differences in the directional couplers in the K3 vs > the KAT500 (and KPA500 for that matter). > > Jack, W6FB > > >> On Jun 2, 2018, at 8:48 AM, jeff griffin <[email protected]> wrote: >> >> I recently brought my KPA/KAT500 north for the summer and hooked up to my > trapped multiband fan dipole that I use here in NJ. I leave my K3 here for > remote use and use the amp at my winter home in Florida to use with my Flex > 6500 with a Steppir Vertical antenna without the KAT500 tuner. When I got up > here I installed the KIO3B option. The install went well with no issues, all > looked good so I connected the K3, P3, KAT500, and KPA500 with the Elecraft > provided cable set like I do every year. >> >> The issue I'm having is an SWR difference between the KAT500 and the K3. > For example if I use the K3's internal tuner I can on a chosen frequency > achieve an SWR of 1/1. I the put the internal K3 tuner in bypass mode and > take the KAT500 out of bypass and set to auto. I then use the xmit button on > the K3 to create a tune signal to be sent to the KAT500. The K3 then shows a > 1/1, the KAT500 about the same but the KPA500 which is in STBY mode shows > around 3/1. What this causes to happen is the Amp will fault out if I try to > use any power output. If I check the antenna with a trusted SWR meter I see > 1.3/1 at the frequency of use. I upgraded the firmware in all the devices in > use, I also did a reset of the KAT's stored frequencies memory, and checked > both the amp and tuner with the utility programs. I'm going to call Elecraft > on Monday, anyone have any ideas in the meantime I can try? >> >> 73 Jeff kb2m >> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
