[Elecraft] QSK Redux

[Vic K2VCO]

Joseph Reed wrote:
> I asked a question about the audio "pop" that occurs in cw when T-R
> is set to 0 (QSK),  I discovered a 1993 thread that discussed
> lowering a resistance value.
> 
> Two questions for those who have done it.  First how effective was
> it?  Meaning at what speed could you still hear between character
> elements 

The best I could do with this and related mods was about 25 wpm.

> And did
> it have a deleterious effect on your transmit key form? 

No.

> Also after
> you did the mod did it eliminate the pop, or just reduce it.

Various K2's seem to have different degrees of pops or clicks.  I 
suggest that you look at <http://www.qslnet.de/member/la3za/K2/mod.html> 
and look for related entries.  I found that adding the DSP and the 
KPA100 complicates getting clean QSK.  I don't want to go into detail, 
because my own observations have been inconsistent and I've made and 
unmade so many changes that I'm confused about what works and what doesn't!
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco