Abstract: A device for suppressing electromagnetic static and voltage surges induced on radio frequency transmission cables is disclosed. The device comprises a blocking capacitor connected to prevent the conduction of DC currents but to permit the transmission of radio frequency signals. An inductor coil is connected between one side of the capacitor and ground. The inductor coil is of a value that blocks conduction of radio frequency signals but allows static and low frequency DC voltage surges to be conducted to ground. A gas discharge unit is also connected from the same side of the capacitor to ground. The discharge unit is a secondary discharge device that only operates when the transient speed and magnitude of the surge is sufficient to cause a back emf to develop across the inductor coil above a predetermined limit. The gas discharge unit assures that the capacitor is not damaged by the back emf.

Abstract: A grounding block is provided for engaging at least one continuous coaxial cable. The grounding block includes an electrically conductive base member having an upper surface, a lower surface, a front surface and a rear surface. The upper surface of the base member includes a hemicylindrical trough extending between the front surface and the rear surface of the base member. The hemicylindrical trough includes a first enlarged radius portion disposed adjacent to the front surface, a second enlarged radius portion disposed adjacent to the rear surface, and reduced radius portion extending between the first and second enlarged radius portion. A corresponding electrically conductive cap member is also provided. A fastener is provided for fastening together the cap member and the base member to align the hemicylindrical troughs of the base member and the cap member to form a cylindrical bore extending between the front surfaces of the base and cap members, and the rear surfaces of the base and cap members.