FW: [Elecraft] K2 Alignment

[Dan Barker]

Thanks for the suggestions. I'm kinda over it. I was gonna record some =
.wav's for folks to listen to, so I don't have to describe what "muddy" =
means, but my KAT2 kit just arrived. USB will have to wait (I used it in =
1981, I believe, another 21 years won't hurt it's feelings, do you =
think?).

Dan

-----Original Message-----
From: Don Wilhelm [mailto:w3fpr@peoplepc.com]
Sent: Thursday, January 24, 2002 4:59 PM
To: Dan Barker
Subject: Re: [Elecraft] K2 Alignment


Dan,

Since you seem to be CW oriented, I would wager that you do not have the =
SSB
module.
If that is the case, USB will sound a lot worse than LSB with the =
varible
bandwidth filter.  The reason is that the filter has a reasonably good =
slope
on the low frequency end (as viewed on Spectogram in LSB mode) while the
high frequency end can be quite 'ratty' and have a slow slope.  When you
switch to USB, the picture on Spectogram 'turns around' (that is what =
was
the low freq audio becomes the high freq end and what was the high end
becomes the low end), resulting in a lot of ripple within the lower
frequency half of the decoded audio spectrum.

One way to help this situation is to make the filter width more narrow.  =
Use
Spectogram and LSB mode to observe the shape of the high end of the
passband, and narrow the filter width to minimize the ripple consistent =
with
a usable passband.  Because of the slow slope with wide filter settings =
you
may find filter widths as low as 1500 Hz to be quite usable for SSB
reception.  It may also be necessary to do the final BFO settings for =
USB
'by ear' for the best deciphering of USB signals.

73,
Don Wilhelm  - Wake Forest, NC   W3FPR home page: =
http://www.qsl.net/w3fpr/
  QRP-L # 485   K2  SN 0020   mailto: w3fpr@arrl.net

----- Original Message -----
From: "Dan Barker" <dbarker@visioncomm.net>
To: "Elecraft" <elecraft@mailman.qth.net>
Sent: Thursday, January 24, 2002 8:24 AM
Subject: [Elecraft] K2 Alignment


Well, CW and LSB sound fine, but USB is very muddy and there may be a
firmware glitch. But except for that, yes, I've got it handled. Since I
don't have a microphone, this is not much of a show-stopper. I just was
hoping for some definitive way to configure the thing on USB, as easy as =
CW.
But them, phone has always been harder for me<g>.

Dan / WG4S / K2 #2456

-----Original Message-----
From: Ken Wagner [mailto:kewagner@ids.net]
Sent: Thursday, January 24, 2002 7:53 AM
To: Dan Barker
Subject: Re: FW: [Elecraft] K2 Alignment


At 05:27 PM 1/23/02, you wrote:
>View this in a fixed font, or it's gonna look BAD.

G'morning Dan:
You sound like you've got your arms around the problem, so I guess there =
is
nothing I can do to help.

Good Luck!!

73, Ken K3IU


_______________________________________________
Elecraft mailing list: Elecraft@mailman.qth.net
You must be a list member to post to the list.
Postings must be plain text (no HTML or attachments).
See: http://mailman.qth.net/mailman/listinfo/elecraft
Elecraft Web Page: http://www.elecraft.com