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
