[Elecraft] Scope Pic - K2 Keying Envelope

[Eric Swartz WA6HHQ - Elecraft]

Hi Steve,

We actually did extensive testing on the K2's TX bandwidth versus keying wave 
shape during the design of the K2. The trailing edge as shown does not cause 
any noticeable key clicks. Wayne and I are both active CW ops and we -hate- 
key clicks :^). We control the wave shape in firmware and in hardware, so any 
user modification is likely to cause a degradation in performance.

In addition to our excellent CW wave shape we made sure the PLL is totally 
stable before enabling or disabling the transmit path. Many other rigs are 
still stabilizing when their circuitry transitions to/from TX, causing 
additional transmit artifacts. The K2 is very clean in this regard.

73, Eric   WA6HHQ
Elecraft

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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.