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> On Jan 11, 2017, at 6:17 PM, Carl Yaffey1 <cyaf...@gmail.com> wrote: > > I posted a while back about not being able to drive my KPA500 to full power > on 6M. Trying to drive it beyond 200 watts resulted in a HI SWR fault. I > initially blamed it on the antenna, cables, connectors, etc. etc. It worked > fine on a dummy load. > But changing antennas and cables and so on resulted in the same problem. > Next, I hooked up my ICOM 706MKIIG. No problem! > Aha! something’s wrong with the K3S. But it worked on the dummy load. > Scratched my head a while and finally decided the K3S was putting out a > spurious signal of some kind. No problem with a dummy load because it didn’t > care what frequencies it was seeing. > > There was an additional problem: No transmit with mode set to USB or LSB. > Change mode to CW, tap the key, switch back to USB, output fine. > > So I sent the K3S off to Elecraft. Yep! Spurious signals being generated. > They replaced Q7 and 8 on the KPA3A, set bias, and did tx again calibration. > They also replaced the KLPA3A board. > > Just got it back today and all is well. > > Great service! > > 73 (NOT 73s), > K8NU > > > Carl Yaffey K8NU > Recording studio. > cyaffeyno_s...@gmail.com > 614 268 6353, Columbus OH > http://www.carl-yaffey.com > http://www.grassahol.com > http://www.bluesswing.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 als...@comcast.net ______________________________________________________________ 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
