This filter may be used in RF environments where there are many strong interfering signals, such as locations near high power broadcasting transmitters or multi-transmitter contest stations.

This filter has 50 ohm input and output inpedances, and is designed to go in front of a receiver. It can be transmittted through at very low levels. Incident power levels must be held below 0 dBm to prevent crystal damage. The -1 dB bandwidth of this filter is 20 kHz. The -60 dB bandwidth is 45 kHz.