You get this while in TX mode? Do you have the top cover on or off for this?
Guy On Fri, Jul 1, 2011 at 1:49 AM, Geoff Wolf AB3LS <[email protected]> wrote: > No go. > > Hooked the radio up to a gel cel battery and we're still getting the 12Khz > junk coming from something and the clicking between TX and RX. > > I made a longer recording of the 'junk' and posted it. Cycled between TX and > RX a few times using the manual TX button on the front. Then finished off > with a few dits and dahs. All while in TX Test mode. > > http://alien.liltechdude.com/files/index.php?dir=Recordings/&file=kpa3squealrev2.mp3 > > Anyone from Elecraft have anything on this? > > AB3LS > > On Fri, Jul 1, 2011 at 1:24 AM, Geoff Wolf AB3LS > <[email protected]>wrote: > >> This is a brand new K3 that I assembled about a month ago. The Serial >> Number is 5517. >> >> I have been using an Astron SS-25A power supply with this which is indeed a >> switcher. I have a battery that I'll be hooking up to it to see if this is >> still a problem. >> >> >> On Thu, Jun 30, 2011 at 4:41 PM, Guy Olinger K2AV >> <[email protected]>wrote: >> >>> A repeated 12 kHz would be echoed all over the room and lose a lot of >>> it's pulse nature. This continues to look suspiciously like crap from >>> a 12 volt switching power supply that is somehow finding something >>> mechanically resonant in the K3. >>> >>> Back to asking for 12 volts from a linear supply (transformer and 60 >>> Hz rectifiers) or battery. >>> >>> Is this particular K3 serial # prior to the introduction of gold >>> plated pins for the KPAIO3 connection? >>> >>> 73, Guy. >>> >>> On Thu, Jun 30, 2011 at 1:52 PM, W5UXH <[email protected]> wrote: >>> > I looked at the MP3 file using Goldwave. It appears to me that the "12 >>> KHz" >>> > component is present only during the tics, not continuously. >>> > >>> > The tic period is roughly 270 msec (I have no idea what the tic is of >>> > course). I zoomed in to a single tic (see PDF of images at the link >>> > below). It appears that each tic has a very distinct pattern seen in >>> the >>> > individual samples which I suspect is the 12 KHz energy. >>> > >>> > I have no idea what any of this means. >>> > >>> > 73, >>> > >>> > Chuck, W5UXH >>> > Las Cruces, NM >>> > >>> > >>> https://sites.google.com/site/k3lineoutrecordings/ab3ls-mp3-file-analysis >>> > Images and comments from Goldwave view of the MP3 file >>> > >>> > >>> > Guy, K2AV wrote: >>> >> >>> >> Hi Geoff, below... >>> >> >>> >> On Thu, Jun 30, 2011 at 9:24 AM, Geoff Wolf AB3LS >>> >> <[email protected]> wrote: >>> >>> And, for even more information, I analyzed the audio that I recorded >>> and >>> >>> the >>> >>> squeal is right around 12Khz. It peaks at -48dB (louder than the QSK >>> >>> relay >>> >>> clicking) >>> >>> >>> >>> http://imgur.com/V8o5t - image of the analysis >>> >>> >>> >>> AB3LS >>> >> >>> >> With your image I realize I had been making some assumptions. I need >>> >> to fill in some details... >>> >> >>> >> Are you listening to the audio in earphones or are you hearing it in >>> >> the free air. I had been assuming listening with your ears only in >>> >> free air to miscellaneous sound in the neighborhood of the K3. >>> >> >>> > >>> > >>> > -- >>> > View this message in context: >>> http://elecraft.365791.n2.nabble.com/K3-KPA100-Squeal-tp6518460p6534295.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 >>> >> >> > ______________________________________________________________ > 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
