Rg6 standard shield Rg type Construction Itemmaterialdiameter(inch/mm) Inner conductorcopper covered steel(ccs)/bare copper(cu)0.041.02 Dietectricfoam pe0.1814.60 First shieldbonded aluminum foil0.1874.75 Second shieldaluminum/bare copper/tinned copper bare0.2115.35 Jacketpvc0.2736.93 Electrical characteristics Capacitance(pf/m)52+/-2 Impedance(î75+/-3 Velocity of propagation(%)85.0 Return loss(db) 5-1000mhz22 1000-2000mhz20 Screening effectiveness(db) 5-1000mhz75 Attenuation(@20) Frequencymax attenuationmax attenuation (mhz)(db/100ft)(db/100m) 50.6 1.9 551.6 5.2 1872.8 9.3 2113.0 10.0 4004.1 13.5 5004.6 15.0 7505.6 18.5 8606.1 20.0 10006.6 21.5 15008.2 26.8 18008.8 28.9 22009.8 32.2 300011.5 37.6