Jay,

ERR KEY indicates that the K3 thinks either the key, or paddle, or PTT (don't forget about PTT over the RS-232 input) is closed when you power on. Check your key and paddles, footswitches or mic PTT button, and if necessary, remove the RS-232 cable. There is also a PTT input on the ACC cable, so if you still have no joy, remove that cable too. If you do find it is one of the cables, rather than just a "book on the key", you will have some more investigation to do.

73,
Don W3FPR

On 1/26/2014 2:21 PM, Jay wrote:
Hi all,

Switched on my K3 this morning and noticed that the VFO B display was showing "ERR 
KEY". Will look into the manual for possible reasons, but appreciate any pointers.


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