[Elecraft] K3S speaker vibration/whine

[Mike K2MK]

Hi Jerry,

You should also try with APF off. APF on the K3 is useful for pulling out
weak signals. I don't see the benefit for general listening. 

Just as a further clarification. Generally, if your bandwidth is dialed in
as 500Hz then your 400Hz filter has been switched out and your current
roofing filter is the next wider one. I say generally because it is possible
to set wider cutoff points for the roofing filters.

73,
Mike K2MK


ae4pb 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. 





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