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BRF 2/…-250

Band-Reject Filters for the 150 MHz
Description
  • High power base station band-reject filters for the 140 – 175 MHz range.
  • The use of large ø250 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. 8000.
  • High frequency stability on temperature and power.
  • 19” mounting brackets are available as an option.
Specification
Electrical
Model
BRF 2/1-250BRF 2/2-250BRF 2/3-250
Frequency 140 – 175 MHz
Max. Input Power
350 W @ 0.5 dB IL 200 W @ 1.0 dB IL350 W @ 1.0 dB IL 200 W @ 2.0 dB IL350 W @ 1.5 dB IL 200 W @ 3.0 dB IL
1 dB Notch Bandwidth 1 % of fc
Impedance 50 Ω
Attenuation
See figure 1See figure 2See figure 3
VSWR ≤ 1.5:1
Environmental
Frequency Stability Approx. 1.5 ppm / °C
Operating temperature range -30 °C to +60 °C
Mechanical
Connection(s) N(f)
Historic Brand Amphenol Procom
Dimensions
ø250 x 600 mm / ø9.84 x 23.62 in.250 x 500 x 600 mm /
9.84 x 19.68 x 23.62 in.510 x 600 x 600 mm /
20.07 x 23.62 x 23.62 in.
Weight
Approx. 4.3 kg / 9.46 lb.Approx. 8.9 kg / 19.58 lb.Approx. 14 kg / 30.8 lb.
Ordering Codes
Model Product No. Model

BRF 2/1-250

 200001579 BRF 2/1-250

BRF 2/2-250

 200001939 BRF 2/2-250

BRF 2/3-250

 200001940 BRF 2/3-250
Additional Information
Typical Response Curves

Figure 1

Figure 2
Figure 3

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-24 Version 1