From my own experience, KY commands work but are clumsy, and there is a l limit 
to how many characters can be sent with one command,  The simple switching 
circuit is quite easy to do and works extremely well,  

All it takes is a 2N2222 transistor with base connected to the proper pin (4 or 
7) thru a 1.2K (1k -1.5K) Ohm resistor,  The collector goes to the plug shield 
and the emitter goes to the tip of the plug.

Plug this into the standard KUSB or standard serial cable.

…bc nr4c

> On Jul 7, 2016, at 10:26 AM, K5WA <k...@comcast.net> wrote:
> 
> Fred,
> 
> One tap of the paddle stops transmission when using KY so you really don't
> need ESC.  
> 
> Bob K5WA
> 
> From: Cady, Fred [mailto:fc...@montana.edu] 
> Sent: Thursday, July 7, 2016 7:15 AM
> To: K5WA; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KX2 and N1MM F-Keys
> 
> When using KY commands in N1MM does hitting escape stop the transmission?
> If no, that would be a disadvantage to me.  A couple of transistor switches,
> actually just one because you don't need PTT usually, is pretty easy to
> build.  There are lots of examples of circuits out there.
> Cheers,
> Fred KE7X
> 
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