Abstract: An electrical connector includes a substantially cylindrical conducting outer body and coaxial contact portion; the outer body having an opening for receiving an end of a cable; a ceramic annular insulator surrounding the contact portion, thereby electrically isolating the contact portion from the outer body; a connecting body connecting to the outer body and coaxial with the opening; and a ring having an exterior surface in contact with an interior surface of the clamp body and coaxial with the opening. The contact portion includes front and rear portions; the rear portion has a hole therein, substantially coaxial with the opening in the outer body, and a slot intersecting the hole for making a solderless connection to a central conductor of the cable. The ring has a slot therein, the ring thereby being closable to make a solderless connection to an outer conductor of the cable.