The HDF173.075M from Shoulder Electronics is a Band Pass Filter with Frequency 173.04 to 173.1 MHz, Bandwidth 0.06 to 0.333 MHz, Center Frequency 173.075 MHz, Insertion Loss 1.75 dB, Power 0.001 W. Tags: Through Hole, RF SAW Filter. More details for HDF173.075M can be seen below.