The RSF-183.600-100-3838-TR from Raltron is a Band Pass Filter with Frequency 183.55 to 183.65 MHz, Bandwidth 100 kHz, Center Frequency 183.6 MHz, Insertion Loss 2.5 to 3.5 dB, Rejection 50 to 20 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-183.600-100-3838-TR can be seen below.