Typical response curves
BPF 4/4
BPF 4/4-4
BPF 4/4
Band-Pass Filter for the 80 MHz Band
Description
- The BPF 4/4 is a 4-helical resonator band-pass filter with aperture-coupling between the resonators.
- This filter can be used as a preselector to protect a receiver against interference from transmissions out of the pass-band, or it can be used to reduce spurious output from a transmitter with up to 50 W of output power.
- The BPF 4/4-C-version fits directly into our receiver multicouplers PRO-AR4G-N… etc.
- The filter can be tuned within the entire 66 – 88 MHz band. It has very small dimensions owing to the use of helical resonators. Careful design and choice of materials ensure reliable operation over a wide temperature range.
- The housing is made of extruded aluminium, the chassis of steel, and teflon insulation has been used in the coaxial cables and in the connectors.
- The filter is coated with black vinyl to prevent corrosion.
Specification
| Electrical | |
| Model | BPF 4/4 |
|---|---|
| Filter Type | Band-Pass Filters |
| Frequency | 66 – 88 MHz |
| Max. Input Power | 50 W |
| Insertion Loss | ≤ 1.4 dB (typ. 1.2 dB) |
| Impedance | 50 Ω |
| Reject Attenuation | See curves |
| VSWR | < 1.5:1 |
| Bandwidth | 3 – 4 MHz |
| Environmental | |
| Operating temperature range | -30 °C to +60 °C |
|---|---|
| Mechanical | |
| Connection(s) | N(f) (BNC(f), TNC(f), UHF(f) or SMA(f) on request) |
|---|---|
| Historic Brand | Amphenol Procom |
| Dimensions | Approx. 165 x 104 x 33 mm / 6.50 x 4.10 x 1.30 in. |
| Weight | Approx. 0.5 kg / 1.10 lb. |
Ordering Codes
| Model | Product No. | Model |
|---|---|---|
|
BPF 4/4-N(f) |
200000887 | BPF 4/4-N(f) |
|
BPF 4/4-4-N(f) |
200002757 | BPF 4/4-4-N(f) |
Additional Information
Mounting Details
All dimensions are given in mm [in.]
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