[Elecraft] K3S speaker vibration/whine

[Randy Moore]

Jerry,

I have this buzzing in my K3, and have heard it in some (not all) of the
K3s I have built for friends. I have found that most of it comes from
vibration between the case top and the vertical metal pieces that contact
the top. If that's what you're hearing, you can minimize it by putting some
vinyl tape over the tops of the metal pieces.  In each case I've seen,  the
buzzing is worst around 400 Hz, near my favored CW sidetone frequency!

73,
Randy, KS4L
On Oct 22, 2015 8:32 AM, <ae4pb at carolinaheli.com> wrote:

> I normally wear a headset but when working I like to listen to code to help
> build my proficiency and am hearing a lot of distortion/buzz/whine. I
> typically am on 40M running about 500Hz wide (my filter is the 8 pole
> 400Hz), NR is ON, APF is ON. I've tried changing the tone from 700Hz to
> down
> around 400Hz and the issue just gets worse.
>
> The speaker is tight against the mesh/top cover so I'm not sure why the
> sound is so buzzy. I don't notice it on SSB. I end up turning the volume
> WAY
> DOWN which makes it better but still some buzz in there. I plan to wire up
> some old surround sound speakers up for stereo and try that but am trying
> to
> figure out what I did wrong in the meantime.
>
> Thanks in advance.
>
>
>
>
>
>
>
> Jerry Moore
>
> CDXA, INDEXA, SKCC, Fists
>
> AE4PB, K3S - S.N. 010324
>
> http://www.qrz.com/db/AE4PB
>
> An Amateur is - Considerate, Loyal, Progressive, Friendly, Balanced, and
> Patriotic.
>
>
>
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