[Elecraft] K3 Speaker cabinet resonances

[Nick-WA5BDU]

I tried various things recommend here on the list and I think cabinet 
buzz is no longer an issue.  But I still have a bad resonance or other 
effect in my built-in speaker itself.  In decreasing frequency, it 
starts buzzing at around 340 Hz, worse at 330 Hz, slight at 320 Hz, and 
then gone.  I pretty much can't use the built-in speaker.  At moderate 
volume levels, even band noise excites those resonances and makes a kind 
of pulsing, buzzing noise like rough CW.

For additional info - I'm not a musical "golden ear", I don't expect 
high fidelity out of the built-in speaker, and I'm pretty crazy about 
the K3 overall.  Yes, I know I should contact support, but I want to get 
my facts together and maybe even make some recordings first.

73--Nick, WA5BDU


Deni F5VJC wrote:
> Has anyone found a solution to the cabinet buzz from the K3 internal speaker?
>
> I've not used the internal speaker until recently on my K3 and now find I
> have annoying cabinet buzz around 450Hz and 600Hz, not so good for CW!
>
> I haven't tried any damping as yet and just wondered if anyone has managed
> to cure this cabinet resonance.
>
> 73,Deni
> F5VJC
> K3 325
>
>