[Elecraft] K3 Key Out Problem

[Gerry Villhauer]

I have had my K3 for a couple years now. Had a Flex 5000 prior. Love the K3 but discovered a problem.  I recently got a receiving loop antenna an connected the keyoutput from the K3 to shut the power off to the loop when transmitting.  On SSB in works fine when the mic is keyed. When operating CW it does not give an output to shutdown the power. Any help appreciated.
Gerry, W0GV