[Elecraft] Re: sigmoidal keying mod

[Vic Rosenthal]

Brendan Minish wrote:

> I am already using t-r = 0 and prior to the sigmod I could just hear 
> between the elements at ~ 25 WPM now I can't.

This is just about the point that it starts to open between dits on my 
rig (with the keying mod).  Maybe just a bit slower.

> I had already tweaked my K2 to speed things up by changing the value of 
> R 17 on the control board.
> http://www.qsl.net/ve3mcf/elecraft_reflect/K2_QSK_Notes.txt

I did this one too.

> but when I added the DSP I didn't like the sound of the receiver muting 
> since this was now audible due to the processing delay of the DSP so I 
> did this mod, the values were 1/2 the value I had ended up with for the 
> first mode (1.5 M if memory serves me correctly)
> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-08/msg00399.html

I did this mod as well, and it improved the sound on make.  But there is 
still a noise burst on break with the DSP installed.

> But now that I have gone looking for links I came across this
> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-08/msg00399.html
> Which I haven't tried but may be worth considering

This link is the same as the one above.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco