Hello Alessandro, This has happened with my amp from new, Elecraft support (Jack Brindle) have been working with myself and one or two others with this problem for a solution. I'm sure he will soon be in touch after you have contacted him.
You might find that when changing bands, this corrects this problem also. 73 Roger MW0IDX KPA500 #268 On 22/10/2012 14:14, iw0hqe wrote: > Hi, this is IW0HQE, Alessandro, from Italy, a very happy owner of the superb > K-line. > > I would like to report what I consider a minor issue/behavior of my KPA500 > power amplifier. > > The amplifier is working flawlessly, and I am definately very satisfied with > it. Only a very peculiar event happened a couple of times during the last > week : when I turned on the amplifier and put it on Oper mode, when I begun > my transmission the PTT triggered correctly (the * symbol appeared as well > in the leftmost part of the display) but there was no power output at all. > This was solved by simpli turning the amp OFF and then back online. I will > now describe the event with further details : > > 1) I have owned the amplifier since 18/09/2012 (one month) and the event > happened only two times during the last week. > > 2) The first time the event happened was right after my last K3 and P3 > firmware upgrades. After upgrading both the devices, I then turned on the > KPA500 to work a DX station and there was no power output; turning OFF and > then back ON the amp solved it. > > 3) The second time the event happened was a couple of days later : I was > listening to some DX stations and pileups for fun, then I needed the > amplifier to make a few calls, I turned ON the rear panel switch, put the > amp on OPER and then begun transmitting, but still no power output. Turning > the amp OFF and then ON solved it. > > 4) Both times the event happened, the rear panel switch was turned ON from > the OFF position. > > 5) Power drive 20 watts. CW mode. > > 6) Temperature reading at the moment of the event : 22-23 °C. > > 7) SWR of my antenna on the band (15 meters the first time and 10 meters the > second time) 1,3:1 or better. > > 8) HV : 74,3 > > 9) Both the events happened after installation of Firmware Revision 04.51 > and DSP 2.76. > > 10) I tried to turn off the amplifier after the second event without > switching the real panel button in the OFF position, and the event never > happened again. I cannot figure out if this is just a coincidence, but maybe > it could be of some use to report it. > > I have seen this event, or some that have a strong resemblance have already > been reported : > > http://elecraft.365791.n2.nabble.com/KPA-500-no-RF-until-power-cycle-td7017734.html > http://elecraft.365791.n2.nabble.com/KPA500-No-power-out-in-quot-OPER-quot-mode-td7472228.html > > I have reported mine also, as suggested by W6FB, Jack Brindle, so that > Elecraft could add this to the feedbacks already received, evaluate and (I > hope) find out and solve this minor issue. > > Thank you for your attention. My very best regards. > > IW0HQE - Alessandro Merolli > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KPA500-Peculiar-behavior-no-power-output-on-Operate-tp7564452.html > Sent from the Elecraft mailing list archive at Nabble.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 ______________________________________________________________ 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
