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RFA 7/8″-50 L cable design
Structurally, cable (feeder) RFA-7/8″-50 consists of:
- central conductor: copper tube with a diameter of 9,0 mm
- dielectric: foamed polyethylene with a diameter of 22,2 mm
- outer conductor: corrugated copper tube with a diameter of 24,9 mm
- protective insulation: black polyethylene, halogen-free, resistant to ultraviolet radiation, diameter 27,5 mm.
Electrical characteristics of the RFA 7/8″-50 L cable
Wave resistance: 50±1 Ohm
Linear capacitance: 76 pF/m
Relative speed: 88%
Maximum frequency: 5100 MHz
Peak working HF voltage: 3,1 kV
Peak working power: 95 kW
Direct current resistance:
– Inner conductor: 2,02 Ohm/km
– Outer conductor: 1,51 ohms/km
Losses in RFA 7/8″-50 L cable
| Frequency, MHz | Attenuation, dB/100m | Power, kW |
| 25 | 0,57 | 16,3 |
| 88 | 1,09 | 8,5 |
| 144 | 1,41 | 6,6 |
| 174 | 1,55 | 6,0 |
| 400 | 2,41 | 3,9 |
| 800 | 5,84 | 1,6 |
| 900 | 3,50 | 2,63 |
| 1800 | 5,5 | 1,68 |
| 2000 | 5,8 | 1,58 |
| 2400 | 6,5 | 1,41 |
| 2800 | 7,1 | 1,29 |
| 4000 | 9 | 1,05 |
| 5100 | 10 | 0,91 |
Mechanical characteristics of the RFA 7/8″-50 L cable
Linear weight: 0,42 kg/m
Maximum tension force: 2000 N
Minimum bending radius, single: 120 mm
Minimum bending radius, repeated: 240 mm
Operating temperature range: -55...+85° C
Resistance to damage: 1,45 kg/mm
Bending moment: 13 Nm
Recommended distance between fasteners: 1 m
The RFA-7/8″-50 feeder is also available in non-flammable black (suffixed BHF). The non-flammable black version has additional UV protection.
Weight and dimensions of the drum:
| Cable type | The length of the cable on the drum | Outer diameter of the drum | Drum width | Weight of empty drum | Weight of drum with cable |
| RFA 7/8″ | 500 m | 134 сm | 74 сm | 68 kg | 342 kg |
A sample passport of a drum with individual parameters of factory testing
Photo of RFA cable marking 7/8″
Photo of RFA 7/8″ BHF cable marking
Trunk coaxial cable 7/8″ is widely used in GSM, DCS, CDMA, 3G WCDMA, MPT, TETRA, WiFi (2.4 GHz), WiMAX (up to 3.8 GHz) networks.
The maximum frequency of cable use is 5 GHz.
Analogues of the standard size with the RFA 7/8″-50 cable are: LCF 78-50″, LDF5 50A, AVA5-50, Eupen 5228A, HPL 50-7/8, HFC 22D, FlexLine 7/8″ R.
7/8″ Feeder Processing Tool
Earther for feeder 7/8″
Cable fastening (clamps) for feeder 7/8″
Connectors for feeder 7/8″
Sergei -
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