[Elecraft] K3: Rough audio with amp even using voice recorder

[Don Wilhelm]

I would first suspect RF feedback.
What happens if you use only the K3?  Connect the K3 to a dummy load and 
listen with your KX3.  That will tell you more than having someone do a 
recording off the air.
If the K3 is clean, then you can conclude it is either the amplifier or 
RF Feedback.
If the bare K3 still has a problem into a dummy load, look at the TX EQ 
settings.

73,
Don W3FPR

On 9/16/2014 12:10 PM, Ignacy wrote:
> I reduce the power to one half, and no change. Also the problem varies from
> band to band.
>
> Ignacy
>
> On Tue, Sep 16, 2014 at 11:28 AM, Jim Brown-10 [via Elecraft] <
> ml-node+s365791n7593150h80 at n2.nabble.com> wrote:
>
>> On Tue,9/16/2014 7:55 AM, Ignacy wrote:
>>> Similar harshness with power limited to 500W. I suspected the amp's
>>> nonlinearity. But KX3 with the same amp (400W out) sounds smooth.
>>