Pete, have you tried increasing the transmit delay between your exciter and the amp? If the exciter continues to transmit briefly after the amp’s relay kicks out, you could see an swr spike.
73, Lou W0FK Lou Laderman Sent from my iPad > On Jan 13, 2024, at 10:50 AM, Pete Smith N4ZR <pete.n...@gmail.com> wrote: > > I've been operating 160M FT8 recently, and am noticing some odd symptoms > from my amp that seem only to occur in FT8 mode. Even running only about > 1170 watts into a good dummy load, with the KPA-1500's ATU bypassed and a > displayed SWR of 1.0:1 during transmit, as soon as the transmission ends both > the display on the amp and the KPA-1500 utility show SWRs ON RECEIVE of > 1.6-1.9:1. > > I just tested on 80 meters, and am seeing the same anomaly on FT8. This does > not happen on CW. > > The question is, where is this spurious reading coming from, and should I be > concerned? > > 73, Pete N4ZR > ______________________________________________________________ > 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 llader...@icloud.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
