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RL618-50U
6-1/8" Unflanged Rigid Line

Rev : 02 | Rev date : 07 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".
6-1/8" unflanged rigid line is a 50-ohm rigid coaxial transmission line, and is ideal for indoor connections between RF broadcasting equipment.

 

FEATURES / BENEFITS

  • Inner conductor is of 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 rigid line is painted for a high quality long lasting finish, which also aids in heat dissipation.


6 -1/8" Unflanged Rigid Line

Technical features

Structure

Product LineRigid Line
Product TypeUnflanged rigid line, copper
Size6-1/8"
Feeder TypeRigid coaxial transmission line (unflanged)
Outer Conductor MaterialC110000 Copper, 99.9% pure
Outer Conductor OD mm (in)155.6 (6.125)
Outer Conductor ID mm (in)151.9 (5.98)
Inner Conductor MaterialC102000 Copper, 99.95% pure
Inner Conductor OD mm (in)66 (2.598)
Inner Conductor ID mm (in)64 (2.52)
Dielectric MaterialAir, with PTFE spacers

Electrical Specifications

Maximum Frequency MHz806
ImpedanceΩ50 +/- 0.5
Relative Propagation Velocity%99.8
Peak Power Rating kW3240
RF Peak VoltagekV18

Mechanical Specifications

Weight kg/m (lb/ft)10 (6.71)
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)
500.110.035235315
880.150.046177238
980.160.049168225
1080.170.051160215
1500.200.060136182
1740.210.065126169
2020.230.070117157
2400.250.077107144
3000.280.08696129
4000.320.09983112
4700.350.10777103
5000.360.11074100
5200.370.1137398
6000.400.1216891
6650.420.1276586
7190.430.1326283
8000.460.1405979

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
Note 4. At UHF frequencies , a minimm length of line (151mm) is required between elbows, in order to achieve broadband UHF VSWR performance

Elbows

Elbow Model NoRL618-50U-EL (Note 4)
Elbow Type6-1/8" Unflanged Elbow
Elbow Weightkg (lb)10.5 (23.1)

Accessories

Accessory Model NoRL618-50U-STRAD61U-NRL618-50-FLARL618-50-IJKRL618-50-SHRRL618-50-FHS
Accessory DescriptionStraight Coupling6-1/8" u/f to Type-N
Adaptor
Flange Adaptor - clamp typeEIA Inner Joining KitSuspension HangerFlange Adaptor - hard solder
Accessory Weight kg (lb)1.6 (3.5)5.0 (11.0)2.4 (5.3)2.1 (4.6)1.3 (2.9)1.6 (3.5)

External Document Links