Flexible Coaxial Cables

RG-178B/U

  Specification: MIL-C-17/93  
  Continuous working voltage: 750V rms max  
  Operating temperature range: -55C ~ +200C  

Construction

Item Material Diameter Remark
Center conductor SPCW 0.31mm (0.012") Strand 7/0.102
Dielectric PTFE (Solid) 0.84mm (0.033")  
Outer shield SPC (Braid) 1.33mm (0.052") 95% Coverage
Jacket FEP 1.8mm (0.071") Light brown color

Electrical Data

Item Specification Remark
Operating frequency 3 GHz max  
Conductor resistance 24.45 Ohm/100ft max at 20C
Dielectric resistance 1000 MOhm/km min at 20C
Test voltage 2000 V rms 1 min
Velocity of propagation 69.5% nom  
Capacitance 32 pF/ft max  
Characteristic impedance 50 2 Ohm  
Approx. weight 8.4 kg/km  
Nom. attenuation 9.7 dB/100ft (0.32 dB/m) at 50 MHz
  14.0 dB/100ft (0.46 dB/m) at 100 MHz
  20.2 dB/100ft (0.66 dB/m) at 200 MHz
  29.6 dB/100ft (0.97 dB/m) at 400 MHz
  33.6 dB/100ft (1.10 dB/m) at 500 MHz
  37.2 dB/100ft (1.22 dB/m) at 600 MHz
  43.9 dB/100ft (1.44 dB/m) at 800 MHz
  47.0 dB/100ft (1.64 dB/m) at 900 MHz
  50.0 dB/100ft (1.64 dB/m) at 1 GHz


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