This is the 4NEC2 antenna bend model for: EFHW Inverted-V
To use this model:
Below. Highlight and copy (Ctrl C) the program control codes (CM,
CE, SY, etc).
Open Windows Wordpad and copy (Ctrl V) the control codes into Wordpad.
Go to "File, Save as..." and name your new antenna model.
In Windows Explorer, right-click on your new model and "Rename" the file to end as ".nec".
Open your new model to alter the V peak height (hgh), bend ratio (R), angle of wires (lat1, lat2), tilt (lon1, lon2)
4NEC2 is an NEC2, NEC4, Windows based antenna modeler and optimizer by
Arie Voors.
It is available free of charge at: www.qsl.net/4nec2/
CM Standardized OCF vertical for 2-radial model converted to EFHW with variable bend point and angles
CM #14 AWG. Over Real ground, Element height fixed at 12.2 meters. Feedpoint height varies by angle of Lat 1
CM V-bend ratio is adjustable based on Length. 0.5= center.
CM End-fed so use short counterpoise and small inductance for hf tuning.
CM Arm longitude (Lon2) is adjustable to change the alignment of the V from straight to a tilt.
CM Arm lattitude (lat1, lat2) is adjustable to set the up and down angles of the V(or L).
CM .
CM Dick Reid,KK4OBI, 2017
CM .
CE
SY hgh=12.2 'Fixed maximum height of V at 40 ft =12.2 meters
SY L=37.44535 'Length optimized as meters of resonant straight half=-wave at 3.8 mHz
SY R=0.5 'Enter bendpoint ratio of inv-V or inv-L (0.5 = center bend)
SY cp=4.534867 'optimized counterpoise length - meters
SY rad1=L*(1-R) 'Length of V-Radial 1 - meters
SY rad2=L-rad1 'Length of V-Radial 2 with counterpoise - meter
SY lat1=60 'degrees angle of V-Radial 1.. 0=dn, 90=side
SY lat2=60 'degrees angle of V-Radial 2. with counterpoise. 0=dn, 90=side
SY lon1=0 'degrees longitude V-Radial 1. Compass setting fixed to North
SY lon2=180 'degrees longitude V-Radial 2.
Compass setting (Tilt) variable from south=180. 270=west, 90=east
GW 1 25
0 0 hgh
rad1*cos(lon1)*sin(lat1)
rad1*sin(lon1)*sin(lat1)
hgh-rad1*cos(lat1) #14 'V-Radial 2
GW 2 25
0 0 hgh
rad2*cos(lon2)*sin(lat2)
rad2*sin(lon2)*sin(lat2)
hgh-rad2*cos(lat2) #14 'V-Radial 1
with counterpoise
GW 3 2
rad2*cos(lon2)*sin(lat2)
rad2*sin(lon2)*sin(lat2)
hgh-rad2*cos(lat2)
rad2*cos(lon2)*sin(lat2)-cp
rad2*sin(lon2)*sin(lat2)
hgh-rad2*cos(lat2) #14 'counterpoise
GE 1
LD 0 2
24 24 0 0.000001
GN 2 0 0 0 4 0.003
EK
EX 0 2
25 0 1
0 0
FR 0 0 0 0 3.8 0
EN