CT165 is a 75 ohm coaxial cable for compatible television and signal-distribution systems where cable loss is a key route-design consideration. Its 1.63 mm bare copper centre conductor is surrounded by foam PE, copper foil and bare copper braid. PVC or LSOH sheath options are listed, with a nominal overall diameter of 10.10 mm. Compare its attenuation with the equipment budget while allowing enough space for the larger cable and connectors.
Inner conductor | Bare copper | Φ1.63 mm |
Dielectric | Foam PE | Φ7.20 mm |
Outer conductor (shield 1) | Copper Foil | Φ7.39 mm |
Shield coverage 1 | 100% | |
Outer conductor (shield 2) | Bare copper braid | 96x0.10 mm |
Shield coverage 2 | 55% | |
Sheath | PVC/LSOH | Φ10.10 mm |
Impedance | 75±5 Ohm |
Nominal capacitance | 50 pF/m |
Velocity of propagation | 85% |
Insulation resistance | >5000 Mohm.Km |
Inner conductor resistance | 8.45 Ohm/Km |
Outer conductor resistance | - Ohm/Km |
Rated temperature | 70°C |
Operating voltage | 30 V |
Cable weight (approx.) | 116 kg/km |
Screening effectiveness | >75 dB (30-1000MHz) >65 dB (1000-2150MHz) |
Frequency(MHz) | Attenuation (dB/100 m) | Attenuation (dB/100 ft) |
50 | 3 | 0.91 |
100 | 4 | 1.22 |
200 | 6 | 1.83 |
460 | 9 | 2.74 |
860 | 12.5 | 3.81 |
1000 | 13.5 | 4.12 |
1750 | 19 | 5.79 |
2150 | 22 | 6.71 |
5-470 MHz | >23dB |
470-860 MHz | >20dB |
860-2150 MHz | >18dB |
1.63 mm nominal bare copper centre conductor.
Copper foil and copper braid screening around foam PE dielectric.
75±5 ohm impedance and frequency-specific loss data through 2150 MHz.
Plan connector clearances and supports around the listed 10.10 mm cable diameter. Compare CT165, CT125 and CT100 at the same operating frequency, then add the losses of connectors, joints and distribution components. Specify sheath material, environmental exposure and project documentation with the required lengths so the complete cable arrangement can be selected.
Is the listed centre conductor exactly 1.65 mm?
The construction table specifies a nominal diameter of 1.63 mm; use that value when checking connector fit.
What is the loss at 1000 MHz?
The listed attenuation is 13.5 dB per 100 m at 1000 MHz.
Does CT165 have steel wire armour?
The construction lists copper foil and copper braid screens with an outer sheath. No steel wire armour is listed.
What is the nominal finished diameter?
The table specifies 10.10 mm, which should be checked against connectors, cable entries and available route space.
What should a distribution-cable enquiry include?
Provide the frequency band, lengths, allowable signal loss, connector type, PVC or LSOH sheath requirement and the installation environment.
