| Physical Characteristics |
| Type Nr. | Inner
Conductor O.D.
in (mm)
| Dielectric
O.D.
in (mm)
| Outer
Conductor O.D.
in (mm)
| Standard
Jacket
in (mm)
| Weight
kg/m |
Low Loss 400
1/4"
RG8/U
JIS
8D type
| 109 (2.77)
Copper-clad
aluminum
1.41Ω/Mft
4.60Ω/km
| .285 (7.24)
closed-cell
PE
| .320 (8.13)
Sealed Al./
Mylar*/Al.+
Tinned copper braid,
85%
1.65Ω/Mft
5.41Ω/km
| 405 (10.3)
Black PVC
| 0.108 |
| Electrical Characteristics |
Nominal
Impedance
(ohms) | Nom.
Velocity of
propagation
| Capacitance
pF / ft (pF/m) | Nominal Attenuation |
| MHz | dB/ | dB/ |
| | 100ft | 100m |
| 50 | 85% | 24.5 (78.4) | 30 | 67 | 2.2 |
| 150 | 1.5 | 5.0 |
| 450 | 2.7 | 8.8 |
| 900 | 3.9 | 12.7 |
| 1500 | 5.1 | 18.6 |
| 2000 | 6.0 | 19.6 |
| 2500 | 6.8 | 22.2 |
| 5500 | 10.2 | 30.5 |
