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_RL318 Series
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RFS rigid line components with aluminium outers are available for unpressurized (indoor). ;
Sizes available are 1-5/8", 3-1/8", and 4-7/8".
All components are manufactured to the most exacting tolerances.
Other line sizes are available on special order.


� Line inner and outer tubing is of high conductivity aluminium, and the inner is of hard-drawn copper, milled to exact dimensions. Unflanged components have a plain matt finish.
� Captive PTFE dielectric insulators are used exclusively
� Captive PTFE dielectric insulators are used exclusively in lines and elbows to ensure precision mating and stability of components after assembly
� All inner conductor connectors are silver plated
� All components conform to the relevant EIA or IEC standards

Technical features


Product LineComponents
Product TypeAluminium Rigid Line Components 3-1/8" 50 ohm
Feeder TypeAir Dielectric, solid inner and outer PTFE spacers
Conductor MaterialOuter: High conductivity aluminium tube Inner: High conductivity copper tube
Outer Conductor OD mm (in)79.4 (3.125)
Outer Conductor ID mm (in)76.8 (3.023)
Inner Conductor OD mm (in)33.4 (1.315)
Inner Conductor ID mm (in)31.3 (1.232)

Electrical Specifications

Frequency Range MHz50 - 862
Frequency BandVHF Band I, VHF Band II, VHF Band III, UHF Band IV/V
Impedance, ohmsΩ50 +/- 0.5
Peak Power Rating kW920
RF Peak Voltage, VoltsV9600
Part number EIA Flanged RL53,555
Isolation dB32
Output Power SplitdB3 +/- 0.35 Note#2
Output Phasedegrees90 +/- 2 Note#2

Mechanical Specifications

Weight kg/m (lb/ft)1.9 (1.26)
Standard lengths m (ft)5.5 (18)
Max. indoor clamp spacing m (ft)1.5 (5)

Ordering Information

Length Unflanged RL m55
Part number Unflanged RL53,555

External Document Links