Sorry, Dave, The link I gave does not work directly. https://buyaircraftparts.com/part-number/cn1327trr31v_00-496-9789 Use that link but enter into their search box : CN-1327/TRR-31(V) That should return the specs for a related attenuator for the TRR-31(V) receiver. 73, ... Martin VE3OAT