8.0 MHz 5-Pole Bessel Low Pass Filter 50 Ohm BNC In/Out Enclosure RF Signal

8.0 MHz 5-Pole Bessel Low Pass Filter 50 Ohm BNC In/Out Enclosure RF Signal

This is a passive 8.0 MHz Bessel low pass filter configured in a 5-pole topology with a 50-ohm input and output impedance. It is housed in a compact, teal-anodized aluminum enclosure with panel-mount BNC female connectors on opposing faces (labeled IN and OUT) and integral mounting flanges on each end. The top label, clearly legible in the photos, confirms the specifications: 8.0 MHz, 5 Pole, 50 Ohm In/Out, Low Pass.

Specifications & What's Included

• Filter Type: Bessel Low Pass
• Cutoff Frequency: 8.0 MHz
• Number of Poles: 5
• Input Impedance: 50 Ohm
• Output Impedance: 50 Ohm
• Input Connector: Panel-mount BNC female (labeled IN)
• Output Connector: Panel-mount BNC female (labeled OUT)
• Enclosure: Teal anodized aluminum housing
• Mounting: Integral flanges with mounting holes on each end
• Unit only — no additional accessories included

Applications

Bessel low pass filters are used in signal processing, RF, and instrumentation applications where preserving the shape of a time-domain waveform matters as much as attenuating unwanted high-frequency content. Unlike Butterworth or Chebyshev designs, the Bessel topology is optimized for maximally flat group delay, which minimizes phase distortion and overshoot on pulse and digital waveforms. An 8.0 MHz, 5-pole Bessel filter at 50 ohms is commonly used in oscilloscope calibration paths, video signal chains, data acquisition systems, and laboratory test setups where BNC-terminated coaxial signal paths are standard. The 50-ohm matched impedance makes it straightforward to insert inline between test instruments and signal sources without introducing reflections. These types of enclosed passive filters are standard bench and rack accessories in RF labs, broadcast engineering, and R&D environments working in the HF and low-VHF frequency range.