[Elecraft] CW keying circuit

[Carter W. Craigie]

I want to be able to do computer-generated CW on my K2, using software such as
DX4WIN and WriteLog. The circuit that works on my wife's Yaesu FT1000 MP Mark V
does not work on her Yaesu FT920, which makes me think it isn't going to work on
the K2, either, because both require a stereo plug. The circuit for the Mark V
addresses a mono plug.

Can someone send me, or point me to, a CW keying circuit for a COMM port that
will work with the K2?

I do not want to use a sound-card approach, such as the RigBlaster. 
73,
Carter
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Carter Craigie N3AO
K2/100 s/n 678
K1 s/n 159
KX1 s/n 119
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