Back
KK4OBI Bent Dipoles
This is the 4NEC2 antenna bend model for: Standard OCF Vertical for 8-Radials
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 the new model to optimize for various angles of bend
(Symbols, "Ang=").
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 8-radial studies
CM #14 AWG. Over Real ground, 28.4 mHz. 1/2 WL
feedpoint
CM OFC ratio is adjustable based on Length
CM OFC Feed. Must use Auto-Segment
CM Arm compass longitude is adjustable 360 degrees
CM Arm lattitude is adjustable 360 degrees
CM Dick Reid,KK4OBI, 2016
CM .
CE
SY hgh=5.282 '150/28.4 = 5.2817 = 1/2 wavelength feed
height over ground at 28.4 mHz
SY L=4.759393 'Length of resonant straight wire -
meters
SY R=0.522289 'Enter feedpoint ratio (0.5 =
center, 0.6=Tall, 0.4=Wide
SY vert=L*R 'Vertical. Ratio length of arm1 - meters
USE AUTO-SEG!
SY rad=L*(1-R) 'Radial. Ratio length of all arms -
meters
SY lat=20 'n-s latitude. Angle of radials.
0=dn, 90=side
SY lon1=0 'e-w longitude arm1. Compass Settings steps
from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
SY lon2=45 'e-w longitude arm2. Compass Settings
steps from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
SY lon3=90 'e-w longitude arm3. Compass Settings
steps from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
SY lon4=135 'e-w longitude arm4. Compass Settings
steps from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
SY lon5=180 'e-w longitude arm5. Compass Settings
steps from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
SY lon6=225 'e-w longitude arm6. Compass Settings
steps from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
SY lon7=270 'e-w longitude arm7. Compass Settings
steps from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
SY lon8=315 'e-w longitude arm8. Compass Settings
steps from 0 to 180(2), 120(3), 90(4), 60(6), 45(8)
GW 1 25
0 0 hgh
0 0 hgh+vert
#14 'Arm1 Vertical
GW 2 25
0 0 hgh
rad*cos(lon1)*sin(lat)
rad*sin(lon1)*sin(lat)
hgh-rad*cos(lat) #14 'Arm2 Radial 1
GW 3 25
0 0 hgh
rad*cos(lon2)*sin(lat)
rad*sin(lon2)*sin(lat)
hgh-rad*cos(lat) #14 'Arm3 Radial 2
GW 3 25
0 0 hgh
rad*cos(lon3)*sin(lat)
rad*sin(lon3)*sin(lat)
hgh-rad*cos(lat) #14 'Arm4 Radial 3
GW 4 25
0 0 hgh
rad*cos(lon4)*sin(lat)
rad*sin(lon4)*sin(lat)
hgh-rad*cos(lat) #14 'Arm5 Radial 5
GW 5 25
0 0 hgh
rad*cos(lon5)*sin(lat)
rad*sin(lon5)*sin(lat)
hgh-rad*cos(lat) #14 'Arm6 Radial 6
GW 6 25
0 0 hgh
rad*cos(lon6)*sin(lat)
rad*sin(lon6)*sin(lat)
hgh-rad*cos(lat) #14 'Arm7 Radial 7
GW 7 25
0 0 hgh
rad*cos(lon7)*sin(lat)
rad*sin(lon7)*sin(lat)
hgh-rad*cos(lat) #14 'Arm8 Radial 8
GW 8 25
0 0 hgh
rad*cos(lon8)*sin(lat)
rad*sin(lon8)*sin(lat)
hgh-rad*cos(lat) #14 'Arm9 Radial 9
GE -1
GN 2 0
0 0 14 6.e-3
EK
EX 0 1
1 0 1
0 0
FR 0 0
0 0 28.4 0
EN
Back