[Elecraft] K3: LP-Pan 2 and the Blob

[Tony Estep]

Clark, set the audio driver to ASIO.

Tony KT0NY

On May 25, 2015 3:54 PM, "engineercm" <clark.macaulay at gmail.com> wrote:
>
> Today I set about to get my new sound card/K3/LP-Pan 2/NAp3/new shack
> computer working in harmony.  Alas, it was not to be.
>
> I've got the levels set correctly (thanks to Larry) and signals are
apparent
> on the band.  What is perplexing is what I have named The Blob (see
attached
> screen shot).  It is:  on all bands; moves in Free Mode  NaP3) and is
> centered around VFO A marker with about 1/3 of the Blob lower in frequency
> and 2/3 higher than VFO A.  It makes me wonder if there is something in
the
> IF signal from the K3 to LP-Pan. The S-meter on the K3 says it is S3-4 in
> the Blob.  I've searched for a setting in the K3 that I've overlooked but
> nothing.  It is so strange to see a symmetrical shape to the Blog--like it
> is being shaped by a filter. If this is true picture of the spectrum at my
> QTH, then I've got huge problems outside.
>
> The sound card is a U5 set to 192 Khz.  Computer is a W7 64-bit.  Turning
> the LP-Pan attenuator ON does reduce the amplitude but but does not
> eliminate the Blob.
>
> I had just completed a noise audit of the QTH  and found some switching
> power supplies that have been fixed with cores. This picture, however, is
> much worse than previously so something has changed.  Just want to rule
out
> a K3/LP-Pan 2 problem.
>
> I'm going to cross post this on the Elecraft and LP-Pan reflectors.
>
> Any thoughts and suggestions would be greatly appreciated.
>
> Clark/WU4B
>
>
>
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