[Elecraft] K2 Key Clicks

[Larry East]

After I built my K2 a couple of years ago, I received a report of key 
clicks. Looking at the output on a 'scope, I saw that the keyed envelope 
had a very fast rise time (<0.5 ms) which was causing the clicks. With help 
from Gary and Wayne, I finally tracked the problem to an incorrect value of 
C125 on the RF board; I had used a 2.2uF cap instead of 22uF! When I 
replaced the cap with one of the correct value, no more key click reports! 
As I recall, the envelope rise and fall times of my K2 are in the 3-5 ms 
range, which most folks consider about right. I wonder what sort of rise 
and fall times the folks who have key click problems are seeing on their rigs?

72/73,
Larry, W1HUE/7
Tucson, AZ