Apparently Elecraft is not aware of the relay and very few of us can hear it. I had my K3 for many months before hearing it. It's as if something suddenly got it started clicking. Either just a few rigs do this or most of us are nearly deaf. Elecraft, can we get an answer on this? Steve Ellington n...@carolina.rr.com ----- Original Message ----- From: "Classe Bergman" <classe.berg...@telia.com> To: <Elecraft@mailman.qth.net> Sent: Thursday, February 05, 2009 12:54 PM Subject: Re: [Elecraft] K3: Relay noise?
> > I have heard this relay noise since I put together my K3 kit s/n 1484 in > August 2008. I always use full QSK, and then it's easy to hear the clicks > if > the room is silent. > I was little surprised in the beginning, as I had read that the T/R > switching should be all electronic. I didn't think no more about that, as > I > have KPA100, KAT3 and KXV3 installed I thought that there was a small > relay > somewhere on the options modules. > > Today I did some tests, and took the top cover off and tried to listen > carefully after the clicks. I am sure that it comes from a relay located > somewhere under the KPA100 module. Not from KAT3 or the LP filter relays. > > There is no change in clicks if I put the radio in TX TEST mode or have > full > RF output, so it is not RF or high current related. > > It very hard to hear if I close PTT or a key manually or tap XMIT, but it > is > still there. > > CW mode , SSB mode or KPA100 disabled, it is still there every time T/R is > switching. > > After a quick look at the K3 LPA schematic, I can se a small relay K1, "3 > dB > attenuator". What is that relay doing ? Can that be a candidate for > causing > the noise? > > I have just done the same tests with an other K3 that was factory build. > Both radios produces exactly the same relay noise. > > I am using the lastest software in the radios now, but it have been the > same > thing with older software. > > 73 Classe SM3GSK > > > ______________________________________________________________ > 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 incoming message. Checked by AVG - www.avg.com Version: 8.0.233 / Virus Database: 270.10.18/1936 - Release Date: 02/04/09 16:35:00 ______________________________________________________________ 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
