[Elecraft] K3: KPA100 Squeal

[W5UXH]

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
> <liltechdude13 at gmail.com> 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.
> 


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