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]
