Download Data sheet: bpf-70-4.en-gb ArticleNo/ P/N: 200002979 BPF 70/4-10-N(f) The BPF 70/4 is a 4 resonator ¼ λ band-pass filter with inductive coupling between the resonators. This filter can be used as a preselector to protect a receiver from interference from transmitters outside the band-pass limits. Price request Download Data sheet: bpf-70-4.en-gb