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
