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RL478-50
4-7/8" Flanged Rigid Line

Rev : 02 | Rev date : 01 Jun 2022

RFS manufactures a range of unflanged and flanged rigid coaxial transmission lines and accessories to meet all commonly used EIA/IEC standards from 1-5/8" to 8-3/16".
4-7/8" unflanged rigid line is a 50-ohm rigid coaxial transmission line, and is ideal for outdoor or indoor connections between RF broadcasting equipment.

 

FEATURES / BENEFITS

  • Inner and outer conductors are made from the highest purity copper (99.95% for inner, 99.9% for outer) for minimum attenuation and lowest operating temperature.
  • Manufactured from hard drawn copper, milled to exact dimensions to ensure strict compliance with specifications and stable characteristic impedance.
  • All spacers/insulators are of virgin PTFE for highest physical and electrical insulation properties.
  • The outer conductor is painted for a high quality long lasting finish, which also aids in heat dissipation.
  • Swivel flange on one end for ease of assembly.
  • Suitable for pressurised systems.


4 7/8" Flanged Rigid Line

Technical features

Structure

Product LineRigid Line
Product TypeFlanged rigid line
Size4-7/8"
Feeder TypeRigid coaxial transmission line (flanged)
Outer Conductor MaterialC110000 Copper, 99.9% pure
Outer Conductor OD mm (in)123.2 (4.85)
Outer Conductor ID mm (in)120 (4.724)
Inner Conductor MaterialC102000 Copper, 99.95% pure
Inner Conductor OD mm (in)52.1 (2.051)
Inner Conductor ID mm (in)50.1 (1.972)
Dielectric MaterialAir, with PTFE spacers

Electrical Specifications

Maximum Frequency MHz862
ImpedanceΩ50 +/- 0.5
Relative Propagation Velocity%99.8
Peak Power Rating kW2160
RF Peak VoltagekV14.7

Mechanical Specifications

Weight (5.5m or 18ft length) kg (lb)39.5 (87.1)
FinishAcrylic paint
Recommended clamp spacing m (ft)2 (6.5)

Ordering Information

Standard Lengths mm (ft)2750, 5500 (9, 18) [Note 3]

Environmental Specifications

Ambient Temperature Range °C(°F)-40 to + 60 (-40 to 140)
Humidity95%, non condensing

Attenuation and Power Rating

Frequency, MHzAttenuation, dB/ 100mAttenuation, dB/ 100ftAverage Power kW
(Note 1)
Average Power kW
(Note 2)
500.140.044153205
880.190.059115154
980.200.062109146
1080.210.065104139
1500.250.07788118
1740.270.08282110
2020.290.08976102
2400.320.0977093
3000.360.1086284
4000.410.1255472
4700.440.1355067
5000.460.1404865
5200.470.1434763
6000.500.1534459
6650.530.1614256
7190.550.1684054
8000.580.1773851
8200.590.1793851
8620.600.1833749

Attenuation at 20°C (68°F)
Mean power rating at 40°C (104°F) ambient temperature
Note 1. Outer temp rise 23°C (73°F), Inner temp rise 60°C (140°F)
Note 2. Outer temp rise 30°C (86°F), Inner temp rise 80°C (176°F)
Note 3. Custom lengths are available on request

Elbows

Elbow Model NoRL478-50-EL
Elbow Type4-7/8" Flanged Elbow
Elbow Weightkg (lb)6.7 (14.8)

Accessories

Accessory Model NoRL478-50-FHSRL478-50-FLARL478-50-IJKRL478-50-SHRAD49-NRL478-50-GSB
Accessory DescriptionFlange Adaptor - hard solderFlange Adaptor - clamp typeIEC Inner Joining KitSuspension Hanger4-7/8" IEC to Type-N AdaptorGas Barrier
Accessory Weight kg (lb)1.2 (2.6)2.1 (4.6)1.3 (2.9)1.3 (2.9)2.95 (6.50)5.2 (11.46)