Band Reject FiltersBRF 4/...-125

Band-Reject Filters for the 80 MHz

Description

  • High power base station band-reject filters for the 66 – 88 MHz range.
  • The use of large ø125 mm cavities means a high Q, resulting in a very narrow notch bandwidth.
  • The large dimensions also mean a high power rating.
  • Unloaded Q of a single cavity is approx. 4500.
  • High frequency stability on temperature and power.
  • 19” mounting brackets are available as an option.

Specifications

Electrical
Model BRF 4/1-125 BRF 4/2-125 BRF 4/3-125
Frequency 66 - 88 MHz
Max. Input Power 300 W @ 0.5 dB IL
175 W @ 1.0 dB IL
300 W @ 1.0 dB IL
175 W @ 2.0 dB IL
300 W @ 1.5 dB IL
175 W @ 3.0 dB IL
1 dB Notch Bandwidth 1 % of fc
Impedance 50 Ω
VSWR < 1.5:1
Mechanical
Connection(s) N(f)
Dimensions ø125 x 1200 mm / ø4.92 x 47.24 in. L:125 x W:250 x H:1200 mm / L:4.92 x W:9.84 x H:47.24 in. L:125 x W:375 x H:1200 mm / L:4.92 x W:14.76 x H:47.24 in.
Weight Approx. 4.3 kg / 9.46 lb. Approx. 8.9 kg / 19.58 lb. Approx. 13.5 kg / 29.7 lb.
Environmental
Operating temperature range -30 °C to +60 °C
Frequency Stability 1.5 ppm/° C (approx.)

Ordering Designations

Model Product No.
BRF 4/1-125 200001918
BRF 4/2-125 200001919
BRF 4/3-125 200001211