trapdip.nec

zip contains tool for Antenna Modelling with examples

CM Trap Dipole:  15-20 Meters
CM Based on www.cebik.com/amod/amod49.html
CM (Lesson 19 ARRL modeling course)
CM Use freq-loop from 13 to 22 Mhz for SWR
CE
GW 1 41 0.0 -10.76433 0.0 0.0 10.76433 0.0 0.04153
GW 2 1 0.0 -11.26268 0.0 0.0 -10.76433 0.0 0.04153
GW 3 1 0.0 10.76433 0.0 0.0 11.26268 0.0 0.04153
GW 4 8 0.0 -13.62485 0.0 0.0 -11.26268 0.0 0.04153
GW 5 8 0.0 11.26268 0.0 0.0 13.62485 0.0 0.04153
GS 0 0 .3058
GE 0
EK
LD 5 0 0 0 30769000.0 0.0 0.0 0.0	' All aluminium
LD 6 2 1 1 235.0 3.3e-6 1.7405e-11 0.0	' Trap 1
LD 6 3 1 1 235.0 3.3e-6 1.7405e-11 0.0	' Trap 2
EX 0 1 21 0 1.0 0.0 0.0 0.0
GN -1
'FR 0 1 0 0 14.05
FR 0 1 0 0 21.10
EN