On 27.09.2013 19:17, Darralld > I don't need an exact replacement. I'm fine with just wiring it in > using a switchcraft jack. I'm not sure how to wire it though. > The original jack is trashed. The nut & the threaded shaft pretty much > came off in my hand. I don't have the unit out of the rack and open to take a look, but maybe this helps: http://www.kylheku.com/mp1-files/mp1-schematics/ADA-MP1-011-027-midi-layout.jpg The MIDI board layout shows small circles labeled 1 2 3 next to jacks 5, 6 and 7. Might these correspond to the numbered boxes in this diagram which label the jack connections? http://www.kylheku.com/mp1-files/mp1-schematics/ADA-MP1-007-027-jacks.jpg