Some transceivers come with a TRS plug input labeled "key".
When wiring my paddle or a straight key for these TRS connector inputs, is there any current standard for which key connection goes to which portion of the TRS? (tip, ring, or sleeve; left or right paddle closure; straight key closure).
Or do I need to make custom cables or a patch board for each radio at which I might find myself operating? (bring my own key + field day guest possibilities: Icom, Yaesu, Kenwood, Elecraft, et.al.) Or do some of these radios have a (panel or software) selectable key input configuration setting?
This question only has an incomplete answer for only one model of radio.