Actually there were three 3rd Ky Infantry company F's, two Confederates and one Federal. The original 3rd Ky CSA Company F was converted to artillary service and became Cobb's Battery. Another company was formed and became company F afterwards. I have a pretty extinsive roster for Cobb's Battery if that will help. The only picture I know of the has members of Cobb's Battery on it is on Geoff Walden's Orphan Brigade website.
http://www.rootsweb.com/~orphanhm/index.html

Todd