Abstract: A waveguide filter switch, including a waveguide transmission path for electromagnetic energy. At least one series resonator filter positioned in shunt with the transmission path. At least one coupling aperture in the waveguide for coupling the at least one series resonator to the waveguide. A switching positioned across the coupling aperture and having an open state wherein the coupling aperture is electrically open to provide for coupling the series resonator to the waveguide and having a closed state wherein the coupling aperture is electrically shorted to prevent coupling of the series resonator to the waveguide. The switch including a sliding member physically located to have an open retracted position wherein the coupling aperture is physically unencumbered to produce the open state for the switch and to have a closed extended position wherein the coupling aperture is physically encumbered to produce the closed state for the switch.