TYPICAL RESPONSE CURVES
Figure 1
BPF 4/…-125
Band-Pass Filters for the 80 MHz Band
Description
- High power base station band-pass filters for the 66 – 88 MHz range.
- The use of large ø125 mm cavities means a high Q, resulting in a very narrow passband.
- 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 included on BPF 4/2-125 and BPF 4/3-125.
Specification
| Electrical | |
| Model |
BPF 4/1-125BPF 4/2-125BPF 4/3-125
|
|---|---|
| Frequency | 66 – 88 MHz |
| Max. Input Power |
300 W @ 0.5 dB IL
125 W @ 2.0 dB IL300 W @ 1.0 dB IL 125 W @ 4.0 dB IL300 W @ 1.5 dB IL 125 W @ 6.0 dB IL |
| Insertion Loss |
Adjustable 0.4 – 2.0 dBAdjustable 0.8 – 4.0 dBAdjustable 1.2 – 6.0 dB
|
| 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) |
|---|---|
| Max. RPM | 200 (On tuning rod) |
| Historic Brand | Amphenol Procom |
| Dimensions |
ø125 x 1200 mm /
ø4.92 x 47.24 in.125 x 250 x 1200 mm / 4.92 x 9.84 x 47.24 in.125 x 375 x 1200 mm / 4.92 x 14.76 x 47.24 in. |
| Weight |
Approx. 4.3 kg / 9.48 lb.Approx. 9.3 kg / 20.50 lb.Approx. 13.7 kg / 30.20 lb.
|
Ordering Codes
| Model | Product No. | Model |
|---|---|---|
|
BPF 4/1-125 |
200000987 | BPF 4/1-125 |
|
BPF 4/2-125 |
200000988 | BPF 4/2-125 |
|
BPF 4/3-125 |
200001881 | BPF 4/3-125 |
Additional Information
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