[Elecraft] DSP and CW?

[Stephen W. Kercel]

Chris:

As you can see from other posts, opinions about the DSP module vary. 
I have it and am very happy with it. I find the DSP narrow-band 
filtering to be superior to an outboard QF-1 analog filter, and very 
effective in enhancing the K2's crystal IF filtering. Set to the 
"most aggressive" position, the DSP denoiser distorts the signal 
quite noticeably, but more importantly, it enables me to copy signals 
that I could not copy otherwise. (The distortion is not much of a 
problem on CW, but I do not know how much it disrupts voice signals.)

There is one claim that I thought was an exaggeration, until I heard 
for myself. With the denoiser on and set very aggressive, the audio 
output in the absence of a signal is so quiet that you'll think that 
the radio is off. This in no exaggeration. On a quiet band with the 
denoiser on, I find myself occasionally toggling it off just to 
verify that the radio is working OK.

I most highly recommend the DSP module.

On the other hand, I have never found the noise blanker to be 
effective against the kind of noise present in my setting. Again, the 
experience of different users varies according to their circumstances.

73,

Steve Kercel
AA4AK




At 10:24 AM 3/29/2007, Chris Kantarjiev wrote:
>Does this combination make sense? I operate 100% CW. These days, I seem
>to be chasing a lot of very weak signals with questionable readability.
>My vertical isn't the quietest of antennas (they never are) and my
>neighborhood has a fair amount of QRM on 40m during "real people hours".
>
>For example, this morning I was trying to get KH2/JR4GPA. Copying his
>sign was very tough, but I finally got it and confirmed it. I called
>a couple of times but realized that I wouldn't recognize my call even
>if he returned it! Just on the egde of ESP.
>
>So ... would AF or DSP help me in this situation? The noise blanker
>doesn't seem to do much good for the noise sources my neighbors provide.
>
>Thanks!
>
>73 de chris K6DBG
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