[Elecraft] K3S speaker vibration/whine

[Vic Rosenthal 4X6GP/K2VCO]

If you do this, be sure to leave some bare metal around the screws so 
there can be good electrical contact for shielding purposes.

73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/


On 22 Oct 2015 18:56, ae4pb at carolinaheli.com wrote:
> Outstanding!! I’ll try that. I don’t listen to my rig often over the
> speaker as I have some different hearing losses in each ear.
>
> <snip>
>
> 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
>
> </snip>