The D30M89M1 from Microwave Circuits is a Diplexer with Frequency f1 30 to 57 MHz, Frequency f2 61 to 89 MHz, Power 100 W, Attenuation 20 to 40 dBc, Attenuation f1 20 to 40 dBc. Tags: Module with Connectors. More details for D30M89M1 can be seen below.