[Elecraft] [K3] Speaker buzz

[Randy Moore]

As far as I know, those are shipped with the 2nd rx option, which I 
don't have.

The Smiths wrote:
> Didn't you get the little foam doughnut that sticks to the back side 
> of the speaker?  This is there to do exactly what you are describing.  
> If not, you should order one from Elecraft.
>  
> > Date: Sat, 14 Aug 2010 10:44:54 -0500
> > From: wrmoore47 at gmail.com
> > To: elecraft at mailman.qth.net
> > Subject: [Elecraft] [K3] Speaker buzz
> >
> > Just completed my third K3/100 build (this one is actually mine!), and
> > like the other 2, this one had a speaker buzz (not heard through
> > headphones) at audio frequencies around 300 hz on CW, but this one
> > seemed worse. I fixed it by:
> >
> > 1. Lining the lip and inside of the speaker shield with one layer of 3M
> > electrical tape. This removed ~80% of the buzz.
> > 2. Putting a 1" long piece of same tape over the middle of the top edge
> > of both sides of the KPA3 module shield. This put tape between the top
> > edge of the shield and the top cover of the K3. This removed the
> > remainder of the buzz, and I now have clean CW tones through the 
> speaker!
> >
> > 73,
> > Randy, KS4L
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