Twinax Cable Specifications For Teflon Cable - IBM 3 User Manual

Twinax Cable Specifications for Teflon Cable

The following are bulk cable specifications for twinax cables with Teflon covering:
Conductor AWG wire size
Stranding
Material
Coating
Resistance
Insulation Material
Outside diameter 6.1 mm (0.24 in.) nominal
Shield Material
Type
Coverage
Resistance
Jacket Material
Color
Average
single-wall
thickness
Outside diameter 8.25 mm (0.325 in.) nominal
Rating Dielectric
strength
Capacitance
Impedance, characteristic
Attenuation @ 100 MHz
Velocity of propagation
Operating environment
20
7 x 28
Copper
Tin (1 conductor only)
11 ohms maximum per 305 m (1000 ft)
Polyethylene
Tinned copper
Braid, 34 AWG, 7 ends/24 carriers,
9.7 ± 10% picks/25.4 mm (1 in.)
95% minimum
3 ohms maximum per 305 m (1000 ft)
Vinyl
Black
0.76 mm (0.029 in.)
4500 V dc for 3 seconds at 28°C (82°F)
53.1 pF/m (16.2 pF/ft) maximum
111 ± 5% ohms at 0.5 MHz
107 ± 5% ohms at 1 MHz
105 ± 5% ohms at 2 MHz and above
4.5 dB/30.5 m (100 ft) maximum at 25 °C (77°F)
4.7 dB/30.5 m (100 ft) maximum at 80°C (176°F)
66% ± 5%
-40°C to 80°C (-40°F to 176°F)
10% to 90% relative humidity
Appendix B. Cable Specifications and Assembly of Cables
347