[Elecraft] K3 - Using Mono Phone Jack Adapter in "Key" Port

[Brian Deuby]

I'm considering attempting modify the operation of my UR5CDX CT 755 
paddle so that it acts like a cootie. I understand that this can be done 
by using a mono phone jack adapter on the end of the CT 755 cable (which 
terminates with a stereo jack) and plugging it into the "Key" port on 
the K3.

I can't find anything in any of my K3 manuals that cautions against this 
- but I do have a vague recollection of seeing some caution of this 
nature somewhere.

Is there any reason I can't safely plug a mono adapter jack into the 
"Key" port on the K3?

Thanks,

Brian K8GRR