Describe your antenna system. Jim ab3cv
On Wed, Jul 15, 2020 at 11:19 AM Nr4c <n...@widomaker.com> wrote: > My first thought is “Heat”! > > > Sent from my iPhone > ...nr4c. bill > > > > On Jul 15, 2020, at 4:43 AM, Ray Spreadbury via Elecraft < > elecraft@mailman.qth.net> wrote: > > > > Hi > > > > I was a member of the UK HQ team for this 24hour IARU event last weekend > and > > was one of the two Ops on 40M SSB. > > > > We took it in turns to be the Run station every 4 hours and I was using a > > 40M 2-El yagi at 60ft. I noticed that every 30-60mins, I needed to do a > > re-tune on the KPA1500 to keep the SWR at or near to 1.1:1, as it seemed > to > > gradually creep up over time. The amp temp peaked at 70C but was mostly > at > > about 55C. The SWR never got above 1.5:1 using KPA1500 screen but I know > > that the yagi was really presenting about 1.6:1 at the run frequency. > When > > not operating as the Run station the other Op was in Partner mode > spotting > > mults & helping with call identification. > > > > We were using the WinTest logging program as this enables us to private > > network with the other UK HQ stations (one on CW & one on SSB for each > > contest band ie. a total 12 stations at any one time, plus Partners). > > Because of Covid, this year we were all single Ops working from home > rather > > than just a few multi op stations. > > > > My K3S & the KPA1500 worked faultlessly for the 24hours as did Wintest > but I > > wonder what was the cause of the SWR increasing over time & needing a > > re-tune? > > > > 73 Ray G3XLG > > > > ______________________________________________________________ > > 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 n...@widomaker.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 j...@jtmiller.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
