The WWVB Loop Antenna, Spectracom Model 8219, is a bi-directional passive loop antenna. When mounted outdoors it receives the WWVB signal and sends the signal to the WWVB Antenna Preamplifier, Model 8207 that is inserted in the antenna feed. The Loop Antenna includes a two-foot mast assembly and two hose clamps to simplify installation. An Antenna Mount for Flat Roof, Model 8213 is available for installations where vent pipe mounting is not practical or desired. BNC Femal connectors