[Elecraft] Re: sigmoidal keying mod

[Brendan Minish]

Hi Wayne & list

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.

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
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

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



At 22:24 23/03/2004, Wayne Burdick wrote:
>Brendan,
>
>I measured the difference between the old and new timing as just a few
>milliseconds. The keying timing was adjusted by this amount (nominally 2 
>ms) to
>minimize the impact of the shaping mod and ensure no keying artifacts.
>
>Please try the T-R = 0 setting, which un-mutes much faster.
>
>73,
>Wayne
>N6KR

-- 
Brendan Minish
   bminish@minish.org
PGP key available from key servers  wwwkeys.pgp.net