Cable Assemblies
SMC carry a large stock of coaxial, RF twin Feeder and multi-core cables, including Heliax type low-loss coax and some less popular 75 Ohm cables, together with our extensive stock of plug types we can manfacture cable assemblies to your exact specifications.

UR76, 43, 67, 39, 57

Supplied with black PVC sheath, polythene dielectric and plain copper inner and outer conductors.

Cable Type UR76 RG58 UR43 UR67 RG8U UR70 UR39 UR57
Impedance (group Ohms) 50 50 50 75 75 75
Sheath diameter in mm 5 5 11 6 8 11
Characteristic Impedance (Ohms) 50 52 52 72 69 75
Velocity Ratio % 66.5 66.6 66.6 69.9 66.6 66.6
Max Volts (KV) 1.9 1.9 5 1.8 4 5
Attenuation db/100m (MHz)
1 1.7 1.4 0.63 1.48 0.79 0.56
10 5.37 4.35 1.96 4.72 2.52 1.83
100 17.38 14.2 6.6 15.25 8.39 6.19
200 25.25 22.53 9.64 22.53 12.62 9.08
300 31.5 28.5 12.13 27.8 15.77 11.38
600 50.8 45 18.1 44 26 17.15
1000 72.6 54.5 24.63 53.4 34.5 23.4
Minimum Bending Radius (cms) 2 2 12 4 7 12