Have had similar problems. Putting split ferrite cores on power supply, computer, key, cables solved the problem. Try lowering your power out to a couple of watts. If the problem goes away, you have RF getting in somewhere.
Sent from my iPad > On Mar 24, 2016, at 5:11 PM, "etks...@gmail.com" <etks...@gmail.com> wrote: > > I recently got a KX3 and KXPA100. I have a Cobra UltraLite Kid up in my loft > with a 4:1 balun and coax down into the floor below. I can tune most bands > fine (I don’t do 80/160 due to plasma TV noise next door). However, when I > try to tune the KXPA100 at 6m it often hangs in transmit. Or it stops with > two dashes displayed. If I check the antenna with my RigExpert AA-600, the > low end of the band is between 3:1 and 4:1, whereas the upper part goes as > low as 1.08 around 53 MHz. I just went to 50.100MHz and pressed tune the > display on the KX3 shows 3.1 and is stuck with the xmit light on until I > press tune again. > > Has anyone seen this? > > Thanks and 73, > Erik Tkal - W1QED > > > > ______________________________________________________________ > 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 k2cm.geo...@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