The new Master FM Antenna for WAMU (FM), WETA (FM), WPFW (FM) and WTOP-FM, all serving Washington, DC, is fully assembled and being erected on a Test Stand for final tuning at ERI’s Factory. As mentioned in previous posts this Master FM Antenna has two (2) inputs, one is Lefthand Circular Polarized and the other is Righthand Circularly Polarized. The Righthand CP input is nondirectional and the Lefthand CP input is directional to comply with licensed facilities authorized for WTOP-FM’s main antenna.