Hi all, Thanks to a friend's investigative skills, I have found the maker of the unusual coaxial connector block on the HP Z3815A GPSDO. See: <http://www.harting.com/en/en/en/sol/verbtech/prod/minicoax/description/03015/index.en.html> Has anyone here had any dealings with this manufacturer or have any idea whether sample or on-off quantities are available? Morris