Merry Christmas! Make sure it is not a transient antenna condition. A solid state amp is going to detect faults rather quickly. A lot of a log SWR/Wattmeters may not see these same faults….
> On Dec 19, 2022, at 8:51 PM, Jack Brindle via Elecraft > <elecraft@mailman.qth.net> wrote: > > What is the fault? We see a lot of issues with antenna systems not being able > to handle the higher power, either 500 or 1500 watts. This can develop over > time or show up very quickly after the amp is installed. Be sure to check the > cabling and connectors for possible arcing. > In this situation, things would work just fine at low power, but not at high > power, with the exact symptoms you describe. > > > 73, > Jack, W6FB > > >> On Dec 19, 2022, at 3:58 PM, David F. Reed <w5sv.d...@gmail.com >> <mailto:w5sv.d...@gmail.com>> wrote: >> >> Lou, >> >> I appreciate the suggestion, but it is with a K4D, properly cabled, used to >> work fine, and does it on some bands but not others... changed the delay to >> 15ms and still does it... Also seems to depend on band; for example, does it >> on 10m, not on 12m... >> >> Also, below, I said 2 SWR meters; I meant 3... >> >> 73 de Dave, W5SV >> >> On 19-12-22 21:28, Lou Laderman wrote: >>> Check the delay setting on your transmitter. You might have a hot switching >>> issue. I think (but check your manual) that unless you’re using the KPA1500 >>> with a K3 or K4 without the 15-pin Elecraft interface cable, you’ll want at >>> least 10ms of delay to avoid that. I had that issue with a K4 and a PGXL. >>> Default on the K4 is 8ms and the PGXL needed 10ms. >>> >>> 73, Lou W0FK >>> >>> Lou Laderman >>> Sent from my mobile device >>> >>> On Dec 19, 2022, at 2:59 PM, David F. Reed <w5sv.d...@gmail.com> wrote: >>> >>> My KPA1500 has started faulting inappropriately for High SWR. >>> >>> I say inappropriately because all 2 of my SWR meters (K4D, KPA1500, Palstar >>> HF-AUTO) show an SWR of between 1.1:1 and 1.2:1. with just the K$ >>> transmitting and also with the KPA1500 in fine as it faults out. >>> >>> Any ideas? >>> >> ______________________________________________________________ >> 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 jackbrin...@me.com <mailto:jackbrin...@me.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 <http://www.qsl.net/> > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to haljr.mas...@gmail.com <mailto:haljr.mas...@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 arch...@mail-archive.com
