Back 

KK4OBI Bent Dipoles


This is the 4NEC2 antenna bend model for: EFHW Straight
To use this model:
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 meters.  Variable feedpoint height.
CM OFC ratio is adjustable based on Length.
CM End-fed so use short counterpoise and small inductance for vhf tuning.
CM Arm ongitude is adjustable 360 degrees around.
CM Arm lattitude is adjustable 360 degrees up an down.
CM .
CM Dick Reid,KK4OBI, 2017
CM . 
CE
SY hgh=12.2    'Fixed maximum height of any element 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)
SY cp=4.534867    'counterpoise length - meters
SY rad1=L*(1-R)    'Length of Radial 1 - meters
SY rad2=L-rad1    'Length of Radial 2 - meter
SY lat1=90    'latitude. arm1. Angle of radials.  0=dn, 90=side, 360=up
SY lat2=270    'latitude. arm2. Angle of radials.  0=dn, 90=side, 360=up
SY lon1=0    'longitude arm1. Compass Settings from 0=north, 90=east,180=south, 270=west
SY lon2=180    'longitude arm2. Compass Settings from 0=north, 90=east,180=south, 270=west
GW    1    25    0    0    hgh    rad1*cos(lon1)*sin(lat1)    rad1*sin(lon1)*sin(lat1)    hgh-rad1*cos(lat1)    #14    'Arm 1
GW    2    25    0    0    hgh    rad2*cos(lon2)*sin(lat2)    0    hgh-rad2*cos(lat2)    #14    'Arm 2
GW    3    3    rad2*cos(lon2)*sin(lat2)    0    hgh    rad2*cos(lon2)*sin(lat2)-cp    0    hgh    #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    28.6    0
EN





Back