I would first check all connections. If you are running 500 w then any bad connection can create your issue, not the amp.
Bill K9YEQ ________________________________ From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> on behalf of Paul Ecker <ecke...@gmail.com> Sent: Friday, January 12, 2024 3:30:16 PM To: Ken Winterling <wa2...@gmail.com> Cc: elecraft@mailman.qth.net <elecraft@mailman.qth.net> Subject: Re: [Elecraft] KAT 500 Loses Match Ken With the KAT connected to a dummy load on the 30M port, I don't see the problem re-occur. The SWR measured outside prior to entering the box with a polyphaser is low. So some type of problem is between the KAT and the connection box outside?? 73 & tnx for help Paul w2eck On Fri, Jan 12, 2024 at 5:13 PM Ken Winterling <wa2...@gmail.com> wrote: > Paul, > > Connect a dummy load in place of the antenna and repeat your testing. > This will eliminate the antenna as a possible source of RFI. > > Report the results of your tests, > > GL! > > *Ken* > *WA2LBI* > > > > > On Fri, Jan 12, 2024 at 4:47 PM Paul Ecker <ecke...@gmail.com> wrote: > >> I am experiencing a new problem for me, with my KAT 500. So far I've >> noticed this issue on 30M. I am using a dipole cut only for 30M with an >> SWR >> of 1.2 to 1.3 max SWR across the band. I “trained the tuner” at 20khz >> segments on 30M. >> >> Setup is K4D, KAT 500 & KPA 500. Win 10 pc. >> >> Running CW, I can start transmitting and all is fine- my LP100A is showing >> 1.2 SWR and am getting max power out of the radio. Then all of sudden the >> SWR jumps to >9.0. The KAT starts chattering and finds a new match. But if >> I start transmitting again – pwr out is only about 10 W at that new match, >> and eventually the tuner becomes untuned again. Sometimes, it will then >> hold the tune but still only getting abt 9-10w power out. The issue occurs >> with KPA500 both on and off. >> >> Does this sound like a KAT 500 problem or maybe an RFI problem. >> >> >> 73 Paul >> >> w2eck >> ______________________________________________________________ >> 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 wa2...@gmail.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 k9...@live.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
