[Elecraft] Phantom signals

[Don Wilhelm]

Pete,

Any chance you can borrow a P3 to see if those spurs are present both 
with and without the computer?
That would be a good test if you can manage it.

The other thing that may help is to bond the K3 to the other gear, 
following the paths of the IF out coax and also the audio cables. Bond 
from box to box rather than trying to "ground" everything to a single 
point (which may cause additional noise pickup.  Use the information on 
that subject from Jim Brown K9YC.
If everything else other than the K3 is plastic cased, bond to BNC 
connector shells and/or computer I/O connector jackscrews.

73,
Don W3FPR

On 11/27/2018 9:44 PM, N4ZR wrote:
>
> Trouble is, my computer supplies N1MM+, including its spectrum 
> display. Catch 22
>
>