Back 

KK4OBI Bent Dipoles


This is the 4NEC2 antenna bend model for: EFHW Inverted-V
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 12.2 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 vhf 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



Back