[Elecraft] K3 CW Text Decoding

[Barry]

Ed,
     It seems to make little to no difference what operating system you 
use. CW Skimmer will never out perform your ears for weak signals; I 
don't think it was ever designed for weak signals. But, for most every 
other CW signal that is reasonably sent, it does seem to work well. And, 
to me it seems to work better when using I&Q data vice just the audio 
out of the radio. This just may be the sound card I was using at the 
time. I just haven't done the in depth testing; I do admit it would some 
interesting testing.

     I'm presently using LP-Pan and a Steinberg UR22 running at 196KHz 
sampling rate with my receiver usually set to around 250-300 Hz while 
contesting. I do suspect that the A/D will make a difference and my 
external sound card should be superior to my internal one. What I do 
know is that Skimmer uses a statistical approach vice just sampling, and 
in a contest when I'm tired, it does better than I do. Do keep us up 
with whatever you find.

73,
Barry
K3NDM

------ Original Message ------
From: "Edward R Cole" <kl7uw at acsalaska.net>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: 10/9/2019 2:43:58 PM
Subject: Re: [Elecraft] K3 CW Text Decoding

>Barry,
>
>I had CW skimmer installed on my old winXP computer but was not impressed with CW detection of weak CW (same for the K3).  But I was using K3 line-out audio so maybe I will try it with my new i5 64-bit machine and feed IF via LP-Pan and UADC4 (brand new A/D converter which supplies 96KHz dual IQ for diversity Rx).
>
>The UADC4 is the latest toy for the digital-eme crowd (but should find use outside of eme for general digital op).  Its not cheap but has totally flat audio bandwidth which is supposed to improve IMD performance for urban users.
>
>I am just building my new i5 win-10pro so haven't used it on the air, yet.  I will add a webpage  for the UADC4, once operational.
>
>73, Ed - KL7UW
>
>Subject: Re: [Elecraft] K3 CW Text Decoding
>Message-ID: <em20cef813-a61b-4d8e-9912-a225efc24835 at office-desktop-i>
>Content-Type: text/plain; format=flowed; charset=utf-8
>
>Dave,
>      Your last comment is correct. However, CW Skimmer comes into its own
>when you feed it IF I&Q data. You can see what is happening across the
>band or a portion of it and still read the signal narrow band. You do
>this by clicking on the signal you want to pursue and and listen in
>narrow band. By clicking on the wanted signal, the radio is tuned to it.
>This does require a little set up and setting offsets, but it is really
>worth it. A little interesting point: in a little less than rigorous
>testing, I found that that Skimmer seems to work a bit better using I&Q
>data rather than just the receiver audio. But, that was not a rigorous
>test and someone who is really interested can do the follow up.
>
>73,
>Barry
>K3NDM
>
>
>73, Ed - KL7UW
>http://www.kl7uw.com
>Dubus-NA Business mail:
>dubususa at gmail.com
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