Happened to me several months ago... one LDMOS out! same symptoms. You need the power with such great band conditions...
GL Frank, W2YK -----Original Message----- >From: [email protected] >Sent: Feb 21, 2021 12:23 PM >To: 'Dana Roode K6NR' <[email protected]>, 'Elecraft Reflector' ><[email protected]> >Subject: Re: [Elecraft] Sudden KpA1500 power reduction > >Just my guess is one of the LDMOS devices let out the magic smoke? >Just a thought... > >Dave wo2x > > >-----Original Message----- >From: [email protected] <[email protected]> On >Behalf Of Dana Roode K6NR >Sent: Saturday, February 20, 2021 9:16 PM >To: Elecraft Reflector <[email protected]> >Subject: [Elecraft] Sudden KpA1500 power reduction > >I'm in the ARRL CW contest this weekend and the KPA1500 has been working >fine. However, a few minutes ago I noticed I was getting about half the >output power on 20 meters that I typically get with around 30 watts drive >(about 600w vs 1200w). PA current is less than normal, around 30a. >Similar problem on the higher bands, I can no longer get 1000w. On 40m I >can, but it requires more drive. > >Seems like something died in the amp; I'm not familiar with the design, but >perhaps an output module. No errors or ill behavior from the amp other than >the loss of power. > >I will contact Elecraft support unless there is something I'm missing here. >I just looked in the archive and see that this has happened to others.... I >use the amp remotely so I guess I'll have to take it home with me. > > Dana >______________________________________________________________ >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]
