[Elecraft] Elecraft technology >> K2+

Mon Dec 29 18:10:59 2003

Yes - I understand that, that's why I asked if anyone had compared the ones
I mentioned.  I have no idea which approach is used in the 599zx or the
MFJ-784B, but they are clearly different, and the difference is not subtle.
As the MFJ proves, it's not impossible to notch one or more tones without
introducing artifacts that make the desired signal difficult to listen to.
Perhaps someone can offer their opinion on the distortion that the KDSP2
adds in this case.  It's not likely that I'll invest the price of the KDSP2
only to find it's worse than the MFJ!

73 and Happy New Year, Floyd - K8AC

----- Original Message ----- 
From: "Lyle Johnson" <[email protected]>
To: "Floyd Sense" <[email protected]>
Cc: "Elecraft" <[email protected]>
Sent: Monday, December 29, 2003 12:14 PM
Subject: RE: [Elecraft] Elecraft technology >> K2+

> Hello Floyd!
>
> > My question is: does the KDSP2 auto-notch function degrade voice
> > readability or does it function more like the MFJ?
>
> Any time you process signals, you alter them and add artifacts or other
> forms of distortion.  The KDSP2 autonotch uses the LMS algorithm, and it
> will sound similar to other units employing this type of algorithm.  The
> distortion is usually much less objectionable than the interference that
is
> being reduced.
>
> It turns out that people have very different reactions to various forms of
> these artifacts, so the only real way to know is to hear one yourself and
> judge.  It is very much a subjective call, not an objective, measurable
one.
>
> 73,
>
> Lyle KK7P