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KK4OBI Bent Dipoles


This is the 4NEC2 antenna bend model for: EFHW Inverted-L
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 L-bend ratio is adjustable based on Length. 0.5=center.
CM End-fed so use short counterpoise and small inductance for vhf tuning.
CM Arm longitude (lon1-lon2) is fixed to North-South
CM Arm lattitude (lat 2) is adjustable for angle of vertical wire.
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=0.3    'Enter bendpoint ratio of inv-V or inv-L (0.5 = center)
SY cp=4.534867    'optimized counterpoise length - meters
SY rad1=L*(1-R)    'Length of L-Radial 1 - meters
SY rad2=L-rad1    'Length of L-Radial 2 with counterpoise - meter
SY lat2=0    'degrees angle of vertical wire  0=dn, 90=side
SY lon1=0    'longitude L-Radial 1 fixed to North=0
SY lon2=180    'longitude L-Radial 2 fixed to South=180
GW    1    25    0    0    hgh    rad1    0    hgh    #14    'Arm 1
GW    2    25    0    0    hgh    rad2*cos(lon2)*sin(lat2)    rad2*sin(lon2)*sin(lat2)    hgh-rad2*cos(lat2)    #14    'Arm 2
GW    3    3    rad2*cos(lon2)*sin(lat2)    0    hgh-rad2*cos(lat2)    rad2*cos(lon2)*sin(lat2)-cp    0    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    28.4    0
EN


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