Yes, I have also had similar problems with the KXPA100 (SN#0876)and have already composed and sent a letter to support. The letter is much too detailed to reproduce here but I also suspected a firmware glitch. My unit was working flawlessly until the upgrade. I'm sure the problem will soon be solved.
73, Ron K4GYD Sent from my iPad > On May 16, 2014, at 6:56 PM, Matt VK2RQ <[email protected]> wrote: > > How are people finding this new firmware? > > I've been having problems recently with my KXPA100, where it intermittently > shows high SWR for a brief moment, and then either recovers or puts itself in > bypass. At first I thought I had an issue with my antenna, but I discovered > it was happening with a dummy load too. It mostly happens on SSB, but it > happens to a lesser extent CW. It also happens with both my KX3 with > integrated cable, and with my K2 using the keying line. I pulled the amp > apart, looking for poor connections and dry joints, but no success there. By > gently blowing across the mike, I was able to get it into the failure mode, > and stay there. The SWR bridge in the amp was reading high. I had a > crossneedle SWR meter between the radio and the amp, but as I blew > progressively harder into the mike, the SWR on the meter was low. Then, once > the power applied reached a certain level, the amp would come good again. > This made me suspect whether the band auto-sensing may have been switching in > a wrong LPF? > > Then last night, I reflashed the amp with release firmware 1.28, but still > had the problem. Then I downgraded the firmware on the amp from 1.28 to 1.09, > which was the release my amp was shipped with. I haven't observed or been > able to reproduce the problem since. This is now leading me to suspect a > possible bug in the 1.28 firmware? > > I'm wondering if anyone else may have observed any strange glitches with the > 1.28 firmware? > > 73, Matt VK2RQ > >> On 3 May 2014, at 2:14 am, Eric Swartz - WA6HHQ, Elecraft >> <[email protected]> wrote: >> >> KXPA100 Production Firmware MCU 1.28 has been released to production status >> and is now shipping. >> >> Important: This version of firmware has new features that require the very >> latest KXPA100 Utility. >> >> We recommend all KXPA100 owners upgrade to the latest KXPA100 utility and to >> KXPA100 MCU 1.28. >> >> >> Some of the Key Changes in this release: >> >> - Better tolerates forward and reflected power overshoot for brief periods >> to support external antenna tuners. Use approximately 10-20 watts of KXPA100 >> output when tuning. >> >> - When the attenuator is acquired because of SWR or high reflected power, >> release attenuator immediately on next key up if SWR has been reduced to 3:1 >> or less. >> >> - Update band voltage tables for ICOM 703 and Yaesu FT-817 >> >> - Reduce power required for ATU tune. >> >> - Add per-band Antenna configuration (requires the new KXPA Utility for user >> interface) >> >> - Improved RS232 handling for 3rd party applications. (Ham Radio Deluxe >> v6.2, PigKnob, etc.) >> >> >> 73, >> Eric >> elecraft.com >> >> ______________________________________________________________ >> 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] ______________________________________________________________ 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]
