The Differences Between RG6 & RG11

By Amanda Gronot

Both RG6 and RG11 are designations for types of coaxial cables, or cables that house two conductors -- usually a single wire and an outer shield -- on a single "axis." These cables transmit electrical energy, and their insulation allows them to travel underground or past metallic objects without significant signal disruption. Typically, coaxial cables transmit radio and video signals. RG6 and RG11 cables are both made of bare copper and have a 75 Ohm resistance.

Conductor

Both RG6 and RG11 cables have one conductor, but the area of the RG6 cable's conductor is .95 square millimeters, and the area of the RG11's conductor is 1.63 square millimeters.

Insulator and Outer Sheath

The insulation material for both cables is made of polyethylene foam, and both have an aluminum, polyester-tape and tin copper braid as an outer conductor. However, the diameter of the insulator for the RG6 cable is 4.6 mm, while the RG11's is 7.24 mm. Additionally, both cables have a PVC outer sheath, but the outer diameter of the RG6 cable is 6.9 mm and the outer diameter of the RG11 is 10.3 mm.

Capacitance, Velocity and Weight

The capacitance of the RG6 cable, or ability of the cable to hold an electrical charge, is 67 pF, or picoFarads, and its capacitance per feet is 18.6 pF. The RG11's capacitance is 57 pF, and its capacitance per feet is 16.9 pF. The velocity of both cables is 78 percent, but the RG6 weighs 59 g per meter and the RG11 weighs 108 g per meter.

Attenuation

The attenuation of the RG6, or the measure of the loss of intensity of the electrical current in the cable, is 5.3 decibels per 100 meters at a frequency of 50 MHz. It is 10 db/100m at 200 MHz and 21 db/100m at 900 MHz. For the RG11 cable, the attenuation is 3.3 db/100m at 50MHz, 7.2 db/100m at 200 MHz and 17.1 db/100m at 900 MHz.