The QBF-238-242-40 from Qualwave is a Band Pass Filter with Frequency 238 to 242 MHz, Bandwidth 4 MHz, Center Frequency 240 MHz, Insertion Loss 5 dB, Upper Rejection 40 [email protected] to 2 GHz. Tags: Module with Connectors. More details for QBF-238-242-40 can be seen below.