Haha glad it helped you, but it  wasn't originally my idea. Credit goes to 
whomever had suggested it to me here on the list. Turning IQ on will draw 
around 10ma more power by my reading, but it's worth it not to hear that 
godawful squeal, IMHO. 

   Nick (I am still using my 3-pole LC filter when I use headphones) 

Jessie Oberreuter <[email protected]> wrote:

>
>On Thu, 8 Aug 2013, Nicklas Johnson wrote:
>
>> I did find that turning I/Q on reduced the spike significantly, but 
>> didn't eliminate it entirely.
>
>  Holy Cow!  That did it!  Rich!  I wonder if your dev unit had the rx 
>I/Q turned on!  Nicklas, THANK YOU!  That takes it down to the point
>where 
>I can no longer hear it!  There's still general high-freq fatigue with
>the 
>ear-buds, but that's hardly unique to the KX3, and I don't generally
>use 
>ear-buds with radios anyway.
>
>      Nicklas, you just made my day!
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