[Elecraft] FW: New CW audio recording: K3 vs. K4D

Sat Jun 27 05:58:34 EDT 2020

I finally got a chance to listen to the recordings. The K4 sounded very
bottom heavy with band noise. I did a quick analysis on the spectrum
analyzer and confirmed that the K3 envelope looks ok, but something is not
right about the K4. The K3 is centered on about 450hz and is symmetrical,
with steep skirts on both low and high end. The K4 appears to be set at the
same center but it blossoms out on the lows, accounting for the low
frequency band noise evident in the recording. The K4 filter high end is
also soft.

Spectrogram available here:

http://www.qrv.com/download/K3K4CWspectrum.png

The K3 is light blue and the K4 is green (the red and blue are unused
channels).

It looks like the DSP filter on the K4 may have a configuration problem.

Tks,

73 Ed w2rf

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
<mailto:elecraft-bounces at mailman.qth.net>  <elecraft-bounces at mailman.qth.net
<mailto:elecraft-bounces at mailman.qth.net> > On Behalf Of Charlie T
Sent: Thursday, June 25, 2020 6:21 PM
To: elecraft at mailman.qth.net <mailto:elecraft at mailman.qth.net> 
Subject: Re: [Elecraft] New CW audio recording: K3 vs. K4D

This is sorta like demonstrating a 4K TV screen using a 1080 video.

Too many detracting variables, recorder, internet, D to A, your audio
system,  etc.

Charlie k3ICH

-----Original Message-----

From:  <mailto:elecraft-bounces at mailman.qth.net>
elecraft-bounces at mailman.qth.net < <mailto:elecraft-bounces at mailman.qth.net>
elecraft-bounces at mailman.qth.net> On Behalf Of
<mailto:kt5te at watershipfarm.com> kt5te at watershipfarm.com

Sent: Thursday, June 25, 2020 8:32 AM

To:  <mailto:elecraft at mailman.qth.net> elecraft at mailman.qth.net

Subject: Re: [Elecraft] New CW audio recording: K3 vs. K4D

I would have to say both sound better then my KX3 speaker.  ;-)  And I'm
waiting for my 

K4D!   BTW, the recording doesn't sound as good and my K2.  :-)  So we'll

see if the K4 can

hold up against the K2.  :-)

--

73, William KT5TE

On Wednesday, June 24, 2020 10:32:51 PM CDT Macy monkeys wrote:

> Overall, the K3 sounded a little smoother to my ears. I do not own a

> K3 nor have I ordered a K4. But I would be happy with either one!

> 

> John K7FD

> 

> > On Jun 24, 2020, at 7:24 PM, Bob Wilson, N6TV < <mailto:n6tv at arrl.net>
n6tv at arrl.net> wrote:

> > 

> > 73,

> 

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