John: If you are using the "Quadrapus cable set" that Elecraft sells for the K3/0-RRC1258 combo, I believe the answer is "Yes."  I remote to W7RN using my K3 and don't have a K3/0 but I've coached others who do get their configuration right and that's how they do it.  Pin 4 of the RJ45 I/O connector on the back of the 1258 is the key line [pin 8 is ground] and you can use it instead, however the Elecraft cable set takes care of all the interconnections for you.

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/22/2019 3:04 AM, John Huffman wrote:
I'm setting up a K3/0-Mini to control my K3 remotely.  I would like to use an external keyer (Logikeyer) since I don't like the timing of the RemoteRig keyer. I have questions.

Does the KEY jack on the back of the K3/0-Mini do anything?  If it operates like a straight key I could send my keyer output to that jack.

I've seen suggestions to modify the cable to the I/O jack on the RemoteRig box and insert the keyer output there.  Does this interfere with the other I/O functions of the K3/0-Mini?

73 de K1ESE
John

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