gp40s.nec

zip contains tool for Antenna Modelling with examples

CM GP 40m (Slope radial)
CE
GW 1 10 0.0 0.0  20.0 0.0 0.0  30.3  .0015
GW 2 10 0.0 0.0  20.0 0.0  7.28  12.72  .0015
GW 3 10 0.0 0.0  20.0  7.28 0.0  12.72  .0015
GW 4 10 0.0 0.0  20.0 0.0 -7.28  12.72  .0015
GW 5 10 0.0 0.0  20.0 -7.28 0.0  12.72  .0015
GE 1
EX 0 1  1  0  1.0 0.0
GN 2 0 0 0 13  0.005 0.0 0.0
FR 0 1 0 0 7.01 1
RP 0  181  1  1000  90 0 -1  1 
EN