HCA78-50JFN
7/8" HELIFLEX® Air-Dielectric Coaxial Cable, flame retardant/ halogen free jacket

Rev : B | Rev date : 03 May 2023

HELIFLEX® 7/8" low loss air dielectric cable

FEATURES / BENEFITS

  • Low Attenuation
    The low attenuation of HELIFLEX® coaxial cable results in highly efficient signal transfer in your RF system.
  • Complete Shielding
    The solid outer conductor of HELIFLEX® coaxial cable creates a continuous RFI/EMI shield that minimizes system interference.
  • Low VSWR
    Special low VSWR versions of HELIFLEX® coaxial cables contribute to low system noise.
  • Outstanding Intermodulation Performance
    HELIFLEX® coaxial cable's solid inner and outer conductors virtually eliminate intermods. Intermodulation performance is also confirmed with state-of-the-art equipment at the RFS factory.
  • High Power Rating
       Due to their low attenuation, outstanding heat transfer properties and temperature stabilized dielectric
    materials, HELIFLEX® cable provides safe long term operating life at high transmit power levels.
  • Wide Range of Application
    Typical areas of application are: feedlines for broadcast and terrestrial microwave antennas, wireless cellular, PCS and ESMR base stations, cabling of antenna arrays, and radio equipment interconnects.


7/8" HELIFLEX® Air Dielectric Coaxial Cable

Technical features

Applications

ApplicationsWireless CommunicationTV & RadioHF DefenseMobile RadioCable Solutions

Structure

Cable TypeAir-Dielectric, Corrugated
Size7/8
Jacket OptionBlack
Inner Conductor Diameter mm (in)9 (0.35)
Inner Conductor MaterialCopper Tube
Dielectric Diameter mm (in)20.2 (0.79)
Dielectric MaterialHelical Polyethylene Spacer
Outer Conductor Diameter mm (in)25.5 (1)
Outer Conductor MaterialCorrugated Copper
Jacket Diameter mm (in)28 (1.103)
Jacket MaterialPolyethylene, PE, Metalhydroxite Filling

Testing and Environmental

Fire PerformanceFlame Retardant, LS0H
Flame Retardant Jacket SpecificationsThe jacketing meets the testing requirements of Underwriters Laboratories UL 1666, and qualifies for the NEC CATVR type rating code (NEC Section 820-51(b) Type CATVR- NEC 1996)as well as IEC 60332-1
Installation Temperature °C(°F)-40 to 60 (-40 to 140)
Storage Temperature °C (°F)-70 to 85 (-94 to 185)
Operation Temperature °C(°F)-50 to 85 (-58 to 185)

Electrical Specifications

Impedance Ω50 +/- 0.5
Maximum Frequency GHz3
Velocity %93
Capacitance pF/m (pF/ft)71 (21.6)
Inductance uH/m (uH/ft)0.178 (0.054)
Peak Power Rating kW73
RF Peak Voltage Volts2700
Jacket Spark Volt RMS8000
Inner Conductor dc Resistance Ω/1000 m (Ω/1000 ft)1.1 (0.34)
Outer Conductor dc Resistance Ω/1000 m (Ω/1000 ft)0.88 (0.27)
Return Loss (VSWR) PerformanceStandard
Min. Return Loss (Max. VSWR)dB (VSWR)Typical 20.8dB (1.2 VSWR) or better within the operation bands of most global frequency ranges. Premium also available. Contact factory for options in your specific frequency band.
Phase Stabilized

Phase stabilized and phase matched cables and assemblies are available upon request.

Temperature & PowerStandard

Mechanical Specifications

Cable Weight, Nominal kg/m (lb/ft)0.68 (0.46)
Minimum Bending Radius, Single Bendmm (in)100 (4)
Minimum Bending Radius, Repeated Bendsmm (in)250 (10)
Bending Moment Nm (lb-ft)27 (20)
Tensile Strength N (lb)1600 (360)
Recommended / Maximum Clamp Spacing m (ft)0.5 / 0.9 (1.8 / 3)

Attenuation @ 20°C (68°F) and Power Rating @ 40°C (104°F)

Frequency, MHzdB per 100mdB per 100ftPower, kW
0.5 0.08 0.03 73
1 0.12 0.04 73
1.5 0.14 0.04 70.90
2 0.16 0.05 61.40
10 0.37 0.11 27.30
20 0.52 0.16 19.20
30 0.64 0.19 15.70
50 0.83 0.25 12.10
88 1.10 0.34 9.11
100 1.18 0.36 8.49
108 1.23 0.37 8.15
150 1.45 0.44 6.92
174 1.57 0.48 6.39
200 1.69 0.51 5.94
300 2.08 0.63 4.84
400 2.42 0.74 4.17
450 2.57 0.79 3.93
500 2.72 0.83 3.71
512 2.76 0.84 3.66
600 3 0.91 3.37
700 3.25 0.99 3.12
800 3.49 1.07 2.91
824 3.55 1.08 2.86
894 3.71 1.13 2.74
900 3.72 1.13 2.74
925 3.78 1.15 2.69
960 3.85 1.17 2.65
1000 3.94 1.20 2.59
1250 4.45 1.36 2.30
1500 4.91 1.50 2.10
1700 5.26 1.60 1.97
1800 5.43 1.65 1.91
2000 5.75 1.75 1.81
2200 6.07 1.85 1.72
2300 6.22 1.90 1.68
3000 7.22 2.20 1.47

External Document Links

Notes