Does the amp show HV=80 V when switched to xmit? If not reposition the interlock switch and make sure the screw and nuts of the "plunger" to activiate it are tight and correct.
73 de Brian/K3KO On 10/22/2012 13:41, Roger Dallimore wrote: > 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:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2221 / Virus Database: 2441/5347 - Release Date: 10/22/12 > ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5347 - Release Date: 10/22/12 ______________________________________________________________ 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
