Tom, You need to leave 160 and 80 for a while. The upper bands are on fire.
73, Barry K3NDM ----- Original Message ----- From: "Tom Blahovici" <tom...@videotron.ca> To: "Dick Dievendorff" <d...@elecraft.com> Cc: "elecraft" <elecraft@mailman.qth.net>, jsdroys...@nc.rr.com Sent: Saturday, November 29, 2014 2:00:30 PM Subject: Re: [Elecraft] KAT500 question Yup it's faulting. Time to check the connections. Strange how it doesn't on 160. Thanks to all for the suggestions. 73's Tom On Nov 29, 2014 1:55 PM, Dick Dievendorff <d...@elecraft.com> wrote: > > It depends on the antenna impedance (the unmatched or SWR measured with teh > ATU in bypass). > > If the unmatched antenna SWR exceeds 10:1, at 600 watts, the ATU might be > faulting to protect itself. > > What does your KAT500 fault table say? > > The ATU is rated to match antennas with 10:1 SWR at 600 watts, 3:1 SWR at > 1000 watts. If the unmatched SWR exceeds 10:1, the ATU might disconnect the > amp at a lower power to protect itself from destructive current through its > inductors. > > It will not match a 20:1 load at 1000 watts. > > 73 de Dick, K6KR > > > > > -----Original Message----- > From: Tom Blahovici [mailto:tom...@videotron.ca] > Sent: Saturday, November 29, 2014 7:54 AM > To: Dick Dievendorff > Cc: <jsdroys...@nc.rr.com>; elecraft@mailman.qth.net > Subject: Re: [Elecraft] KAT500 question > > Hi > Yes erased the 80m and then did a bunch of tunes across the band, all OK. > However,, if I then provide a carrier for more than 3 seconds on a tuned > frequency the kat500 starts flipping relays and then goes back to steady only > to keep repeating itself. > In manual mode. That is not supposed to happen in manual mode as far as I am > aware. > > On Nov 29, 2014 10:11 AM, Dick Dievendorff <d...@elecraft.com> wrote: > > > > All full search tunes, whether started by manually pressing the TUNE button > > or an SWR-based autotune, store the tuning solution in memory. > > > > I'd suggest you erase the tuner settings for 20 meters on the affected > > antenna connector KAT500 Utility configuration tab) and "train" the tuner > > by pressing TUNE and provide a 20 watt tune signal on a few frequencies > > across the band. You don't want remnants of the erroneous settings in those > > memories, or you'll keep finding them. > > > > Then leave the ATU in mode MAN so that it selects from previously found > > tuning solutions as you QSY across the band. > > > > As for how you got there - I can speculate, but I don't know anything about > > your path from ATU to antennas. It probably matched a different impedance > > at some point in the past. I might get that result here by having an > > external antenna switch in the wrong position and use the KAT500 to match > > my 15 meter beam on 20 meters, and then change my antenna switch. > > > > You probably don't want the ATU in mode AUTO very often. After antenna > > configuration changes, erase the tuner memories on the affected bands, and > > tune at a few spots on the band. Then let the ATU choose from those > > settings by frequency, which it will do in mode MAN. > > > > 73 de Dick, K6KR > > > > > > > > > On Nov 29, 2014, at 06:17, <jsdroys...@nc.rr.com> <jsdroys...@nc.rr.com> > > > wrote: > > > > > > Our KAT500 (used with K3 and KPA500) seems to have forgotten its correct > > > memories for the 20 m band or maybe developed new erroneous memories. It > > > gives me 14 to 1 on autotune. If I set it on manual and do a tune it > > > reads 1.2 to 1. So here is the question: if I do manual tunes every so > > > many MHz across the band will those go into memory, or is the memory > > > based only on autotunes? > > > > > > Also, any idea how this happened? > > > > > > THANKS! > > > Julie KT4JR > > > > > > ______________________________________________________________ > > > 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 > > tom...@videotron.ca > ______________________________________________________________ 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 k3...@comcast.net ______________________________________________________________ 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
