[Elecraft] Scope Pic - K2 Keying Envelope

[Vic Rosenthal]

Steven Gibbs wrote:
> 
> WD1V has posted a fine image of the K2 keying envelope.
> 
> The K2 is good on the leading edge (rise), but less
> than perfect on the trailing edge (fall) when there is
> an abrupt transition when the power is still high.
> For minimum bandwith (= minimum key clicks) the
> trailing edge should mirror the leading edge (I seem
> to remember that a cosine squared waveform function
> needs the minimum bandwidth).

I had the same feeling when I looked at the picture.  However, no one has
reported hearing clicks from the trailing edge.  Why is this?  

If you listen for clicks, remember that you must listen AWAY from the frequency
to hear them.  If you listen on frequency, a narrow filter will lengthen the
rise/fall times and remove the clicks.

Vic K2VCO