RR The amp was totally silent for the first few weeks of its life. The clicks only started happening after a mains brown-out here (the mains went down and back up several times in rapid succession as they tried to clear a fault in the local grid, I guess). I wondered if that event might have damaged something but everything apart from the popper works well.
I tried reloading the firmware* just in case that had been corrupted, but no change. The amp only pops when its warm i.e. in use, so it does seem to be temperature-related. 73 Gary ZL2iFB * By the way, I couldn't locate the KPA500 firmware on the Elecraft website (maybe I overlooked it but I couldn't see a link), but anyway the KPA Utility found it for me. > -----Original Message----- > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > boun...@mailman.qth.net] On Behalf Of Joe Word > Sent: Friday, 9 December 2011 10:40 a.m. > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA500 Heat Expansion Pop > > Gary, > > That sounds like what I am hearing, thought it was a relay controlling the fan, > but as you said, it did not pop when the fan came on/off. > > Joe N9VX > > ---------------------------------------------------------------------------- ------------------ > --------------- > Mine pops or clicks too. > > In my case, it sounds like a relay switching. I thought at first it was something > sensing the temperature and changing the fan speed, but the pop doesn't > (often) coincide with a change in fan speed, so I think that's a red herring. > > Another ZL told me his KPA does the same thing. > > Our amps still work just fine though! > > 73 > Gary ZL2iFB > > > > On Thu, Dec 8, 2011 at 12:37 PM, Joe Word <joe.n...@gmail.com> wrote: > > My KPA500 has developed a heat expansion pop. When it heats up and > > then cools down I get a pop from inside the amp. It does this now > > every time I make a SSB transmission. > > > > Anyone else experience this? If so, any resolution? > > > > Joe N9VX > __________________________________________________________ > ____ > 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
