The invention provides a simple solution for a broadband transmitterreceiver for which the working bandwidth is split into at least two non-contiguous sub-bands. The bearing pack, having a rotating cylindrical sleeve, bearing elements and two seal assemblies, is secured within an assembly bore of a stationary housing by a retainer plate accepting a plurality of lag bolts circumferentially spaced around a top portion of the stationary housing. The present invention can be applied to a case where, for example, an image that can look like an image displayed on a PDP is to be displayed on an LCD. The cathode structure is disposed within the shell substrate of the anode structure. Extending transversely through the interior cavity is a rod with its opposite ends that extend laterally from the sides of the receiver box and become covered with concrete.