What are RG9 Coaxial Cables?

RG9 coaxial cables are a type of cable that is commonly used for transmitting high-frequency signals, such as those used in satellite and cable television systems. These cables are designed to transmit signals over long distances and are suitable for use in both indoor and outdoor installations.

The letters A/B/C indicate a specification modification or revision. For instance, RG 9/U is superseded by RG 9A/U.

RG-9/U

The RG-9/U is a 50-ohm double-shielded coaxial cable with an overall diameter of 0.420 inches and a voltage rating of up to 4000 Vrms. It has an inner silver-coated copper wire (carrying the electrical signal) with 7x21 stranding construction. The inner conductor is enclosed by an insulation layer made of Polyethylene (PE) and the insulation layer is then completely enclosed by two shield layers. The first shielding layer is made of silver-coated copper braid, and the outer shield is made of plain copper braid. The shields form an outer conductor which also provides protection from electromagnetic interference (EMI). Finally, the structure is covered with an outermost layer called a jacket made of Polyvinyl Chloride (PVC). The jacket protects the cable core from mechanical, moisture, and chemical issues.

The RG-9/U cable exhibits capacitance of approximately 30.2 pF/ft, signal attenuation of around 5.9 dB/100 ft at 400 MHz (signal attenuation of the cable depends on the frequency) and has a velocity propagation of 66%. It has a center conductor measuring 0.085 inches (2.16 mm) in diameter and an insulation layer measuring 0.285 inches (7.23 mm) in diameter. This cable is ideal for use in CATV systems, CCTV monitoring systems, computer network systems, and camera systems.

Key Specifications of RG-9/U Cables

RG-9A/U

The RG-9A/U is a 50-ohm double-shielded coaxial cable with an overall diameter of 0.420 inches and a voltage rating of up to 4000 Vrms. It has an inner silver-coated copper wire (carrying the electrical signal) with 7x21 stranding construction. The inner conductor is enclosed by an insulation layer typically made of Polyethylene (PE) and the insulation layer is then completely enclosed by 2 silver-covered Copper Braid Shields that form an outer conductor and also provide a shield against electromagnetic interference (EMI). Finally, the structure is covered with an outermost layer called a jacket made of Polyvinyl Chloride (PVC). The jacket protects the cable core from mechanical, moisture, and chemical issues.

The RG-9A/U cable exhibits capacitance of approximately 30.2 pF/ft, signal attenuation of around 6.1 dB/100 ft at 400 MHz (signal attenuation of the cable depends on the frequency) and has a velocity propagation of 67%. It has a center conductor measuring 0.085 inches (2.16 mm) in diameter and an insulation layer measuring 0.28 inches (7.2 mm) in diameter.

Key Specifications of RG-9A/U Cables

RG-9B/U

The RG-9B/U is a 50-ohm double-shielded coaxial cable with an outside diameter of 0.420 inches and a voltage rating of up to 5000 Vrms. It has an inner silver-coated copper wire (carrying the electrical signal) with 7x21 stranding construction. The inner conductor is enclosed by an insulation layer typically made of Polyethylene (PE). The insulation layer is then completely enclosed by 2 silver-covered Copper braid shields that form an outer conductor and also provide a shield against electromagnetic interference (EMI). Finally, the structure is covered with an outermost layer called a jacket made of Polyvinyl Chloride (PVC). The jacket protects the cable core from mechanical, moisture, and chemical issues.

The RG-9B/U cable exhibits capacitance of approximately 31 pF/ft, signal attenuation of around 6.1 dB/100 ft at 400 MHz (signal attenuation of the cable depends on the frequency) and has a velocity propagation of 67%. It has a center conductor measuring 0.089 inches (2.26 mm) in diameter and an insulation layer measuring 0.28 inches (7.2 mm) in diameter.

Key Specifications of RG-9B/U Cables

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