Impedance_Ohms
Cut_Off_Freq_GHz
Percent Speed Light
            __-----__
           /  d_inch \   Impedances inside coax
          /    ___    \
         |    / ^ \    |
         |   |  |_ |__\|  Z_ohms           = sqrt(L/C)
         \    \___/   //
          \     D_inch/
           \__     __/
              -----

  Z_ohms           = 138*log(D_inch/d_inch)/sqrt(E)
  C_pf/ft          = 7.36*E/log(D_inch/d_inch)
  L_uH/ft          = 0.14*log(D_inch/d_inch))
  Delay_ns/ft      = 1.016*sqrt(E)
  Propagation_%_c  = 100/sqrt(E)
  CutOffFreq_Ghz   = 7.5/( sqrt(E)*(D_inch+d_inch) )