Re: K3 DSP AGC Question

Posted by Guy, K2AV on Feb 08, 2010; 8:04pm
URL: http://elecraft.85.s1.nabble.com/K3-in-a-cw-pileup-needs-work-tp4523884p4536719.html

OK, except a lot of people have these 400 and 600 ohm headsets by
well-known makers. People are blaming it on everything from the phases
of the moon to the neighbor's dog.  It would be good to have that
cleanly targeted.

What's the recommended workaround or is there a workaround?  Maybe a
high impedance headphone dongle kit that terminates the stereo speaker
audio in 8 ohms and has both headphone jacks?

73, Guy.

On Mon, Feb 8, 2010 at 2:00 PM, Lyle Johnson <[hidden email]> wrote:

>
>> There IS something entirely separate with the headphone audio and HI-Z
>> headsets, high volume levels, maybe a sharp saturation point, and
>> mush, just haven't nailed it yet.
>
> Note that the headphone audio path of the K3 is designed for 32-ohm and
> lower headphone impedances.  Higher impedance phones provide less audio for
> a given transducer efficiency.  Cranking up the AF gain to compensate can
> lead to clipping-related distortion.
>
> 73,
>
> Lyle KK7P
>

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