The WBCDB3-819.8-835-838-853.2-50 from Wainwright Instruments is a Band Pass Filter with Frequency 835 to 838 MHz, Bandwidth 3 MHz, Center Frequency 836.5 MHz, Insertion Loss 1 to 1.25 dB, Rejection 50 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCDB3-819.8-835-838-853.2-50 can be seen below.