That would be: You get this while in TX Test Mode? On Fri, Jul 1, 2011 at 12:17 PM, Guy Olinger K2AV <[email protected]> wrote: > 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]
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