I had a similar issue earlier in the year, and there was a firmware fix for it, so I suggest you upgrade your KXPA100 to the latest firmware.
73, Matt VK2RQ > On 8 Dec 2014, at 2:07 pm, Jim Stahl via Elecraft <[email protected]> > wrote: > > I've run into several occasions where in mid-CW transmission my KXPA100 > (with internal tuner) SWR takes a momentary jump from matched to maybe 3:1. > I > see the SWR jump on both the KXPA front panel LEDs and on the KX3 VSWR > display. It lasts for maybe half a second, I hear several clicks of the > relays in the tuner, and them it's back to normal. When normal the SWR is > pretty > much 1:1 on the KX3, and the second green LED lit on the KX3. I've not > seen it happen at the start of a transmission, but rather several characters > into a CQ or exchange.. > > In the ARRL 160 contest Saturday night this was happening perhaps once > every 2-3 minutes. I'm using a fairly well matched antenna - not random > wires. > I also encountered this problem on 15 meters when operating from W1AW/8 in > WV in October. In both cases I was running a pretty high CW duty cycle > while running at a pretty good clip. The amp was warm, but the heat sink air > > flow is not blocked. > > Any thoughts? > > > 73 - Jim K8MR > > > > > ______________________________________________________________ > 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]
