[Elecraft] Multiple Ghost Image CW Decodes While Using CW Skimmer & a K3

[Don Wilhelm]

  Don,

It is not likely that the ghost images are coming from the K3 itself, so 
narrow roofing filters are not likely to help.

The ghost images normally are associated with something in the audio 
chain of whatever is connected to the K3.  Soundcard amplitude problems 
(overdrive), or just plain "cheap" soundcards.  The other potential 
problem is the transformers in the K3.  They can create some distortion 
if the Line Out gain is set greater than 10.

So check the K3 Line Out gain setting, and if the ghosts are still 
present, suspect clipping or overload of the computer soundcard.

I wish you luck in determining which of the many variables is causing 
your conditions.  There are no immediate and precise answers - it is 
more of a "guessing game" and you have to check out each "guess".

73,
Don W3FPR

On 2/28/2011 8:22 PM, goldtr8 at charter.net wrote:
> Interesting I get ghost images when I create an artifical filter via dsp
> that I see in DM780.  My IF is a 2.1k and I am cranking down to 500hz or
> less for some of the modes.
>
> Maybe I need an additional IF at 500 to 700 hz?
>
> Don
> KD8NNU
>
>