The 2590-2 from KR Electronics (A Division of NIC) is a Band Pass Filter with Frequency 48 to 59.8 MHz, Bandwidth 11.8 MHz, Center Frequency 53.9 MHz, Insertion Loss 3 dB, Rejection 50 dB. Tags: Module with Connectors, Lumped Component Filter. More details for 2590-2 can be seen below.
