Send your email to Elecraft support. Can't hurt.
On Fri, Mar 15, 2019 at 12:26 PM Gary J Ferdinand <alapa...@w2cs.net> wrote: > I’m in the process of checking out my amp. I have two dipoles (40 and > 80). At resonance both show a 1.2:1 SWR with ATU totally bypassed. With > ATU on, it remains bypassed on 80, but shows only the ATU ON LED on 40. In > both cases the resultant SWR is 1.2:1. SWR measurements are from the > KPA1500 display. > > When I use the amp with my K3 and drive it up to 1500W, I am occasionally > getting an excessive PA current fault at 63A. From a cold start it’s 60A, > but as it warms up in contest usage I find the power drops off, so I have > to adjust the K3 to bring it back up to 1500W. At that point the PA > current goes over 60A. > > Interestingly, into a dummy load the 1500W point shows a PA current of > only 55A. So the 1.2:1 SWR, be it via a bypassed ATU or using the ATU, is > sufficient to raise the PA current eventually to excessive levels. > > Suggestions? I don’t want this to be flipping out during a contest. I > also don’t want to reduce power into what should be a totally acceptable > load. > > 73 > > Gary W2CS > > > ______________________________________________________________ > 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 ______________________________________________________________ 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
