This is the 4NEC2 antenna bend model for: Standard OCF Tall L-Dipoles
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 optimize variable arm length (L=) for
various angles of bend (Symbols, "ang2=").
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 Standard OCF Tall L-Dipole
model for comparison studies
CM #14 AWG. Over Real ground, 28.4 mHz. 1/2 WL
feedpoint height
CM OFC ratio is adjustable based on Length
CM OFC Feed. Must use Auto-Segment
CM Each arm angle is adjustable 360 degrees
CM Dick Reid, KK4OBI, 2016
CM
CE
SY hgh=5.282 '150/28.4=5.282= 1/2
wavelength feed height over ground at 28.4 mHz
SY L=5.228654 'Length of resonant straight wire -
meters
SY R=0.6
'Enter feedpoint ratio (0.5 = center, 0.6=Tall, 0.4=Wide
SY arm1=L*R 'Ratio length of arm1
- meters USE AUTO-SEG!
SY arm2=L*(1-R) 'Ratio length of arm2 - meters
SY ang1=0
'Arm1 angle 0=up 45=right 90=right 180=down
SY ang2=90 'Arm2
angle 0=up 45=right 90=right 180=down
GW 1 25
arm1*sin(ang1) 0
arm1*cos(ang1)+hgh 0
0 hgh #14 'Arm1
GW 2 25
0 0 hgh
arm2*sin(ang2) 0
arm2*cos(ang2)+hgh #14 'Arm2
GE -1
GN 2 0
0 0 14 6.e-3
EK
EX 0 1
25 0 1
0 0
EX 0 2
1 0 1
0 0
FR 0 0
0 0 28.4 0
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