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 <[email protected]> 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 <[email protected]> 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:[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]
