[Elecraft] K3: Strong Signals in passband

[Don Wilhelm]

David,

Try reducing the Line Out level on the K3 to see if that makes a 
difference.  At one time there was a recommendation that the Line Out 
level should not exceed 10 to minimize distortion.
You may have to increase the LINE IN setting on your computer to compensate.

73,
Don W3FPR

On 8/6/2014 8:55 AM, David Cole wrote:
> Hello,
> I have a few friends who live close by.  When they operate, digital, and
> while the K3 is in DIGITAL A mode, I see what looks like random white
> noise across the audio passband of the K3 audio waterfall, (not on the
> P3 at all), when viewing with any digital program.  I have been
> attempting to characterize this a bit more prior to asking questions so
> here is what I see:
>
> 1.  Any strong digital audio signal, causes this issue.
> 2.  Looking at the P3, I see no ill affects.
> 3.  The K3 is feeding my computer's sound card.
> 4.  The same setup only using an Icom 756 PRO III did not do this.
> 5.  I am feeding the sound card from the rear audio jack.
> 6.  I have watched loud signals drift louder, and had the problem start,
> while I was looking at it.  There is an avalanche effect.
> 7.  Turning down the RF gain control, which reduces audio, reduces the
> issue.
>
>