Description
9.5 MHz 5-Pole Bessel Low Pass Filter 50 Ohm BNC In/Out Enclosure RF Signal
This is a passive 9.5 MHz 5-pole Bessel low pass filter in a rugged metal enclosure, with 50-ohm impedance on both the input and output. The filter uses BNC connectors on each end panel, clearly labeled IN and OUT, and is housed in a painted aluminum enclosure with mounting flanges at the base. The specifications are printed on a label affixed to the top of the enclosure: 9.5 MHz Bessel Filter, 5 Pole, 50 Ohm In/Out, Low Pass. No manufacturer name is visible on the unit.
Specifications & What's Included
- Filter type: Bessel low pass
- Cutoff frequency: 9.5 MHz
- Number of poles: 5
- Input impedance: 50 ohms
- Output impedance: 50 ohms
- Connector type: BNC (both input and output)
- Enclosure: painted metal with mounting flanges
- Label on top states: "9.5 MHz Bessel Filter, 5 Pole, 50 Ohm In/Out, Low Pass"
- Unit number marked on output end panel: 16
- No manufacturer name or part number visible on unit
- Filter unit only — no additional accessories included
Applications
Bessel low pass filters are used in RF and analog signal chains where flat group delay (linear phase response) is more important than sharp roll-off at the cutoff frequency. The Bessel design preserves the shape of pulsed and modulated signals better than Butterworth or Chebyshev topologies, making it a common choice in video signal processing, pulse transmission, data communications test setups, and laboratory signal conditioning. A 9.5 MHz cutoff with 50-ohm in/out impedance is well-suited to baseband video or intermediate-frequency (IF) filtering applications, and to benchtop test environments where BNC-terminated signal paths are standard. Five-pole Bessel filters of this type were widely used in analog instrumentation and communications test equipment from the 1970s through the 1990s. The enclosed form factor with mounting flanges allows the filter to be panel- or chassis-mounted in a rack or instrument enclosure.
This 9.5 MHz 5-pole Bessel low pass filter has been inspected and appears to be in good used condition. The blue metal enclosure shows light surface wear consistent with normal handling and storage. The BNC connectors on both the input and output ends are intact and undamaged. The label on top is present and legible, though it shows some age-related yellowing and minor soiling. The unit was pulled from a working environment. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Unbranded |
Model: |
9.5 MHz 5-Pole Bessel Low Pass Filter |
Type: |
Low Pass Filter |
Filter Type: |
Bessel |
Number of Poles: |
5 |
Cutoff Frequency: |
9.5 MHz |
Impedance: |
50 Ohms |
Connector Type: |
BNC |
Filter Topology: |
Low Pass |
Form Factor: |
Enclosed / Benchtop Module |
Enclosure Material: |
Metal |
Condition: |
Used – Pulled from Working Environment |
SKU: |
33021 |
Seller Notes: |
Unit only; no additional accessories included. |
Condition Notes: |
9.5 MHz 5-pole Bessel low pass filter in good used condition. Enclosure shows light surface wear; BNC connectors intact. Label present and legible. Pulled from working environment. |
