RG59 Series Specifications Physical Dimensions Component Standard Shield Inches    mm Tri-Shield Inches    mm Super-Shield Inches     mm Nominal Center Conductor Diameter 0.032 0.81 0.032 0.81 0.032 0.81 Nominal Diameter Over Dielectric 0.144 3.66 0.144 3.66 0.144 3.66 Nominal Diameter Over First Shield (Tape) 0.151 3.84 0.151 3.84 0.151 3.84 Nominal Diameter Over Jacket 0.240 6.10 0.244 6.20 0.265 6.73 Nominal Jacket Wall Thickness 0.032 0.81 0.030 0.76 0.034 0.86 Nominal Diameter of Steel Messenger 0.051(single) 1.30 0.051(single) 1.30 0.051(single) 1.30 0.072(dual) 1.83 0.072(dual) 1.83 0.072(dual) 1.83 Electrical Characteristics Nominal Impedance 75 Ohms Nominal Velocity of Propogation 85% Attenuation [@68°F.(20℃.)] Frequency (MHz) Maximum (dB/100 ft) Maximum (dB/100 m) 5 0.86 2.82 55 2.05 6.73 55 2.45 8.04 187 3.60 11.81 211 3.80 12.47 250 4.10 13.45 300 4.45 14.60 350 4.80 15.75 400 5.10 16.73 450 5.40 17.72 500 5.70 18.70 550 5.95 19.52 600 6.20 20.34 750 6.97 22.87 865 7.52 24.67 1000 8.12 26.64