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New UHF Spectrum antennas?

24K views 62 replies 15 participants last post by  Yurii Pylypenko 
#1 ·
Hello,
I was hoping someone (Holl_ands? or Niklm) would post some antenna designs rescaled for the new UHF spectrum,
but I haven't seem any here.
Anyone know if Holl_ands is still active on this site?
I would really love to build a Fat Dipole antenna for the new UHF spectrum, I have lots of tubing lying around waiting to be used! :(
Schoolbus
 
#2 ·
Hi Schoolbus

Here's a design for a UHF antenna made from 1/2" copper tubing, soldered joints and a 1/4" bolt to separate the element from the reflector. Feed point is made by soldering in #10 copper screws, through holes in the copper elbow. I designed it to work well from 470mhz to 700mhz. Many of the parts are sized to make the antenna easy to build. Tubing lengths are sized so that they are cut to the nearest 1/2". Lengths in the NEC file are for the tubing and the joints, so lenghts might be effected by the brand of elbows and tees that you use. I've got a version that is made of 10 pieces of tubing cut 5" long, and 10 pieces cut to 8" that is almost as efficient. The design could be optimized a bit more, if you weren't concerned with keeping dimension easy to measure and cut. NEC file below.

Code:
CM  
CE
SY Scale=1.0
SY sc=Scale
SY Rsrc=0.14	'SOURCE Wire Radius, Adjusted for AGT=1.0:    UHF=0.262    584=0.24   Autoseg(10)   UHF=0.143   584=0.14
SY Rquad=0.3125	'BiQuad Element Radius 1/2" copper
SY Ract=0.3125	'Reflector Element Radius
SY Rbolt=0.125	'Bolt Radius
SY Rwing=0.1		'Wing Radius     #10 bolt
SY feedgap=1.0	'Wing Feedpoint Gap Size    1.0
SY fgap=3.53539	'BiQuad Gap Size
SY fg=fgap/2		'1/2 feed gap
SY qlen=6.9375
SY qdelta=qlen*.7071
SY qfdelta=qdelta-fg
SY qflen=qfdelta*1.4142
SY qh=qfdelta+qdelta
SY rdback=4.25
SY rdb=rdback
SY Rlen1=19.375	'11.375     19.375
SY Rpos1=3.34375	'2.84375      3.34375
SY Rlen2=11.25	'11.25
SY Rpos2delta=4.8125	'4.8125
SY Rpos2=Rpos1+Rpos2delta
GW	1	1	rdb*sc	-feedgap/2*sc	0*sc	rdb*sc	feedgap/2*sc	0*sc	Rsrc
GW	2	2	rdb*sc	fg*sc	0*sc	rdb*sc	qdelta*sc	qfdelta*sc	Rquad
GW	3	2	rdb*sc	-fg*sc	0*sc	rdb*sc	-qdelta*sc	qfdelta*sc	Rquad
GW	4	2	rdb*sc	fg*sc	0*sc	rdb*sc	qdelta*sc	-qfdelta*sc	Rquad
GW	5	2	rdb*sc	-fg*sc	0*sc	rdb*sc	-qdelta*sc	-qfdelta*sc	Rquad
GW	6	3	rdb*sc	qdelta*sc	qfdelta*sc	rdb*sc	0*sc	qh*sc	Rquad
GW	7	3	rdb*sc	-qdelta*sc	qfdelta*sc	rdb*sc	0*sc	qh*sc	Rquad
GW	8	3	rdb*sc	qdelta*sc	-qfdelta*sc	rdb*sc	0*sc	-qh*sc	Rquad
GW	9	3	rdb*sc	-qdelta*sc	-qfdelta*sc	rdb*sc	0*sc	-qh*sc	Rquad
GW	12	2	rdb*sc	-fg*sc	0*sc	rdb*sc	-feedgap/2*sc	0*sc	Rwing
GW	13	2	rdb*sc	fg*sc	0*sc	rdb*sc	feedgap/2*sc	0*sc	Rwing
GW	51	3	0*sc	-Rlen1/2*sc	Rpos1*sc	0*sc	0*sc	Rpos1*sc	Ract
GW	52	3	0*sc	-Rlen1/2*sc	-Rpos1*sc	0*sc	0*sc	-Rpos1*sc	Ract
GW	51	3	0*sc	0*sc	Rpos1*sc	0*sc	Rlen1/2*sc	Rpos1*sc	Ract
GW	521	3	0*sc	0*sc	-Rpos1*sc	0*sc	Rlen1/2*sc	-Rpos1*sc	Ract
GW	531	3	0*sc	-Rlen2/2*sc	Rpos2*sc	0*sc	0*sc	Rpos2*sc	Ract
GW	54	3	0*sc	-Rlen2/2*sc	-Rpos2*sc	0*sc	0*sc	-Rpos2*sc	Ract
GW	531	3	0*sc	0*sc	Rpos2*sc	0*sc	Rlen2/2*sc	Rpos2*sc	Ract
GW	541	3	0*sc	0*sc	-Rpos2*sc	0*sc	Rlen2/2*sc	-Rpos2*sc	Ract
GW	55	2	0*sc	0*sc	-Rpos2*sc	0*sc	0*sc	-Rpos1*sc	Ract
GW	56	2	0*sc	0*sc	Rpos2*sc	0*sc	0*sc	Rpos1*sc	Ract
GW	57	3	0*sc	Rlen1/2*sc	-Rpos1*sc	0*sc	Rlen1/2*sc	Rpos1*sc	Ract
GW	58	3	0*sc	-Rlen1/2*sc	-Rpos1*sc	0*sc	-Rlen1/2*sc	Rpos1*sc	Ract
GW	61	3	0*sc	0*sc	Rpos2*sc	rdb*sc	0*sc	qh*sc	Rbolt
GW	62	3	0*sc	0*sc	-Rpos2*sc	rdb*sc	0*sc	-qh*sc	Rbolt
GS	0	0	0.0254
GE	0
LD	5	0	0	0	58000000	'Copper Elements
GN	-1
EK
EX	0	1	1	0	1	0	0
FR	0	40	0	0	470	6
RP	0	1	73	1510	90	0	1	5	0	0
EN
Let me know if you need more info or pictures.

Lawrence
 
#6 · (Edited)
What type of antenna did you want to make for UHF, a yagi or something like a 4-bay panel antenna like the M4 with fat tubing elements instead of whiskers? The 4-bay would have wider bandwidth than the yagi to cover 14-36 on UHF with more constant gain across the band. It would be similar to the Winegard HD-4400, but use tubing instead of wide strips.



https://imageevent.com/holl_ands/multibaydipoles/winegardhd4400

You would need to increase the element lengths and vertical bay spacing for 14-36.

http://www.hdtvprimer.com/ANTENNAS/comparing.html

http://www.hdtvprimer.com/ANTENNAS/w4400.html
 
#4 ·
Anyone know if Holl_ands is still active on this site?
I don't have any personal information on the question, but the forum shows his "Last Activity: 2019-10-17 01:17 PM".

Holl_ands has posted some new spectrum designs on his imageevent page, but not the fat dipole. There was also a recent thread about a new spectrum GH antenna, but again, not fat dipole.

One could also use the scaling calculator at: Martin E. Meserve - K7MEM - Antenna Frequency/Diameter/Length Scaling to scale an older fat dipole design for use on the new spectrum. It would not be optimized, but it should be close enough.
 
#5 ·
The last activity by holl_ands on the other forum he uses, AVS, was on Oct 5, 2019. So, it's been almost two months since he was here on DHC, which is unusual. I wonder what happened to him? He is an expert antenna modeler.
 
#7 ·
Something like this 8-bay fat dipole is what comes to my mind. I have used it as a basis for scaling to fit the tube I have on hand and the channel I want to receive, but never got around to actually building.

Don't know what Holl_ands has been up to the last couple of months, but do remember reading that he has been teaching a grandson to run the antenna modeling software. Been wondering when/if we might hear from the grandson...
 
#8 ·
Neil, that 8 Bay Fat Dipole is what I am after, but scaled for the new UHF Spectrum.
I have a LOT of 1 inch stainsteel tubing!

Rabbit, the HD4400 antenna is in the same zone- but from what Holland modelled of those Wineguard antennas, they seem hi gain but very narrow focus. Which is why I like Hollands Fat Dipole Antennas, they are hi gain, but wider focus, which is what I need where I am located (Oshawa Ontario, trying to pick up but Toronto and Buffalo and Hamilton)

IF only Holland could redo his Fat Dipole antennas scaled for the new UHF Spectrum.
Schoolbus
 
#10 ·
@schoolbus,
Its quite simple to frequency scale any antenna from a higher freq to a lower freq.

Just increase all dimensions, including the wire radius by a frequency scale factor of old_freq/new_freq. A quick and dirty method would be to modify the existing model's scaling card (GS). For example in holl_ands 8 bay fat dipole, UHF Vert 8-Bay Dipole + 43 Pair RR - OPT
try changing this line. And see what ya come up with.

Code:
 from
GS 0 0 0.0254' CONVERT ABOVE FROM INCHES TO METERS FOR NEC.
Code:
to
GS 0 0 0.028275' CONVERT ABOVE FROM INCHES TO METERS FOR NEC.
In other words from .0254, to .0254 * 590 MHz/530 MHz (chosen rather arbitrarily looking at the existing model's freq sweep).
resulted in a very similar pattern, that rolls off much sooner and 15 dBi gain at 470 MHz, instead of 13.5 dBi gain in the original model.
The peak gain essentially unchanged, 16.75 dBi but occurred at 614 MHz, instead of 680 MHz. Without any further optimization.

Though the dipoles would be like an inch O.D., phasing lines like 1/8" O.D. and the reflectors like 3/8" O.D.
And around 67" tall...
 
#12 ·
here, in this quick hack, I multiplied all holl_ands' symbols that are used as inputs
by 590 MHz / 530 MHz.
Model
Sweep
Pattern
results
HTML:
         --- Gain ---              -- Ratios -- -- Impedance --           
   Freq    Raw    Net   SWR BeamW    F/R    F/B    Real    Imag  AGT  corr
==========================================================================
  467.0  15.16  15.14  1.15  40.9  14.77  30.22  285.09  -37.11 0.97 -0.14
  473.0  15.26  15.22  1.22  40.8  14.91  31.43  268.33  -46.14 0.97 -0.14
  479.0  15.35  15.28  1.29  40.7  15.14  32.78  251.65  -51.28 0.97 -0.14
  485.0  15.42  15.32  1.37  40.8  15.53  33.87  235.60  -52.93 0.97 -0.14
  491.0  15.49  15.35  1.44  40.8  15.82  34.63  221.04  -51.61 0.97 -0.14
  497.0  15.50  15.32  1.51  40.7  16.01  35.24  208.18  -48.12 0.98 -0.07
  503.0  15.56  15.34  1.58  40.8  16.28  35.73  197.14  -43.07 0.98 -0.07
  509.0  15.57  15.31  1.63  41.1  17.00  36.11  188.04  -36.98 0.98 -0.07
  515.0  15.61  15.31  1.70  40.7  17.38  34.24  179.06  -31.57 0.98 -0.07
  521.0  15.84  15.50  1.76  39.8  16.29  33.58  171.40  -21.92 0.98 -0.07
  527.0  15.89  15.52  1.80  39.5  16.28  33.18  166.64  -12.33 1.00 -0.01
  533.0  15.99  15.61  1.82  38.7  15.62  32.04  165.17   -2.19 1.00 -0.01
  539.0  16.07  15.64  1.88  39.7  15.86  32.93  159.48    2.64 1.00 -0.01
  545.0  16.16  15.71  1.91  40.1  16.91  32.34  157.61   15.86 1.00 -0.01
  551.0  16.17  15.72  1.91  40.9  17.67  32.50  158.99   29.00 1.00 -0.01
  557.0  16.23  15.78  1.91  39.9  18.26  30.45  160.82   38.08 1.01  0.05
  563.0  16.33  15.88  1.92  39.8  18.71  29.72  162.96   51.28 1.01  0.05
  569.0  16.57  16.17  1.85  38.7  16.89  29.14  173.72   65.19 1.01  0.05
  575.0  16.70  16.32  1.80  38.3  16.57  28.46  183.03   77.65 1.01  0.05
  581.0  16.77  16.43  1.76  39.0  17.64  27.93  196.67   92.20 1.01  0.05
  587.0  16.68  16.38  1.69  38.9  17.59  27.42  216.19  105.51 1.06  0.26
  593.0  16.77  16.52  1.61  38.7  17.59  26.72  244.14  117.00 1.06  0.26
  599.0  16.84  16.65  1.52  38.0  16.88  25.87  282.82  120.76 1.06  0.26
  605.0  16.83  16.68  1.45  38.5  17.39  25.38  332.97  112.27 1.06  0.26
  611.0  16.73  16.61  1.39  38.5  17.19  24.67  387.98   72.64 1.06  0.26
  617.0  15.95  15.83  1.40  38.6  16.87  23.88  420.89   -7.09 1.19  0.76
  623.0  15.42  15.26  1.48  39.0  16.31  23.03  395.07  -98.59 1.19  0.76
  629.0  14.51  14.27  1.61  40.0  15.49  22.08  322.90 -148.81 1.19  0.76
  635.0  13.14  12.81  1.75  44.2  14.42  21.03  252.35 -148.28 1.19  0.76
  641.0  11.25  10.86  1.84  88.7  13.01  19.88  206.25 -121.87 1.19  0.76
  647.0   9.10   8.69  1.86 102.3  11.33  18.65  182.79  -89.06 1.15  0.60
  653.0   6.70   6.33  1.80 109.8   9.59  17.55  175.35  -57.83 1.15  0.60
  659.0   4.99   4.69  1.70 110.8   8.52  17.20  179.55  -30.71 1.15  0.60
  665.0   4.74   4.53  1.56 104.1   8.75  18.12  192.90   -8.96 1.15  0.60
  671.0   5.56   5.44  1.40  93.2   9.87  19.67  214.24    5.70 1.15  0.60
  677.0   6.77   6.72  1.24  82.6  11.17  20.78  242.26    9.96 1.11  0.47
  683.0   7.73   7.72  1.10  74.3  12.28  21.20  273.30    0.04 1.11  0.47
  689.0   8.49   8.48  1.10  68.6  13.16  20.94  299.93  -27.71 1.11  0.47
  695.0   9.07   9.01  1.26  64.1  13.79  20.37  310.14  -70.52 1.11  0.47
  701.0   9.44   9.28  1.47  61.4  14.22  19.62  295.23 -115.54 1.11  0.47
 
#13 ·
Modified holl_ands' nec2 file to run thru nikiml's eval script...


HTML:
CM UHF 8-Bay Vertical Fat Dipoles, NO Sweep, 43-Pairs-RR, 4nec2 by holl_ands, 29Aug2014
CM Frequency scale to the post repack spectrum, 15Dec2019
CM 1-in O.D. Elements, 43 Reflector Rods 3/8-in O.D, Hop=1.1-in.  PYTHONSEG(6), 7 Python Variables.
CM DipoleLength=Vrbl, DipoleSpacing=Vrbl, FeedSep=Vrbl (AWG8).  Ignore Fat Wire Warnings.
CM
CM 911 Segs so can use default nec2dxs1k6 NEC-Engine, NO Errors or Warnings, UHF AGT=1.0.
'CMD--OPT -s(470,12,10) -t(16,18) --swr-target=2.7 --f2r-target=20 --f2b-target=20
'CMD--OPT --target-function=(4*max_ml+16*max_gain_diff+4*max_f2r_diff+max_f2b_diff)/25
'CMD--OPT --auto-segmentation=0 --char-impedance=300 --validate-geometry=0
CM D--EVAL --auto-segmentation=6 --char-impedance=300 --num-cores=8
CM D--EVAL  --uhf-52 --total-gain --centers --publish
CE
' Simulated SOURCE Wire Radius, Adjust for AGT=1.0: UHF=0.529
SY Freqscale=590/530
SY Rsrc=0.5520
SY Rdip=0.4375 * Freqscale
SY Rfeed=0.06425 * Freqscale
' Dipole-To-Dipole Separation:
SY DDSep=8.954643 * Freqscale' 7, 15
' Dipole Half-Length (cut down from BOUVAL's 9.75-in, may round to 1/8-inch):
SY DLen=7.859371 * Freqscale' 5, 12
SY DSwp=0
' Separation between two FEEDLINE wires:
SY FeedSep=2.165418 * Freqscale' 1, 6
' From center of Feedline Cross-Over to center of OUTER Dipoles:
SY ZCross=1.37709 * Freqscale' 1.375, 8.25
SY Hop=1 * Freqscale
SY Cond=2e+07
'
' Reflector Rod Separation behind Dipoles (may round to 1/8-in):
SY RS=4.75988 * Freqscale' 3, 25
' Reflector Rod-to-Rod Separation (may round to 1/8-in):
SY RR=1.502842 * Freqscale' 1.5, 3
' Reflector Rod Half-Lengths (may round to 1/8-in):
SY YRod=16.78125 * Freqscale' 10, 30
SY Rrod=0.1875 * Freqscale
' Gap Between each Reflector Rod Pair:
SY Rgap=0.2504655 * Freqscale' 0.25, 25
'
' Calculated from above INPUT Values:
SY ZDInr=DDSep/2' Distance from antenna center to center of INNER Dipole
SY ZDMid=DDSep/2+DDSep' Distance from antenna center to center of LOWER-MIDDLE Dipole
SY Z1=ZDMid
SY Z2=ZDMid
SY Z3=ZDMid
SY Z4=ZDMid-ZCross+0.875
SY Z5=ZDMid-ZCross
SY Z6=ZDMid-ZCross-0.875
SY Z7=ZDInr
SY Z8=ZDInr
SY Z9=ZDInr
SY Z11=DDSep+ZDMid
SY Z12=DDSep+ZDMid
SY Z13=DDSep+ZDMid
SY Z14=DDSep+ZDMid-ZCross+0.875
SY Z15=DDSep+ZDMid-ZCross
SY Z16=DDSep+ZDMid-ZCross-0.875
SY Z17=DDSep+ZDInr
SY Z18=DDSep+ZDInr
SY Z19=DDSep+ZDInr
SY Z21=2*DDSep+ZDMid
SY Z22=2*DDSep+ZDMid
SY Z23=2*DDSep+ZDMid
SY Z24=2*DDSep+ZDMid-ZCross+0.875
SY Z25=2*DDSep+ZDMid-ZCross
SY Z26=2*DDSep+ZDMid-ZCross-0.875
SY Z27=2*DDSep+ZDInr
SY Z28=2*DDSep+ZDInr
SY Z29=2*DDSep+ZDInr
SY YDInr=FeedSep/2+(DLen^2-DSwp^2)^0.5' Ymax for Inner Dipoles
SY YDOut=FeedSep/2+(DLen^2-DSwp^2)^0.5' Ymax for Outer Dipoles
'
'  #    segs    X1      Y1        Z1     X2        Y2         Z2    radius
' SIMULATED SOURCE WIRE:
GW  1     1    +RS    -FeedSep/2    0.0     +RS        FeedSep/2     0.0    Rsrc
' INNER DIPOLES:
GW  2     5   DSwp+RS     YDInr         Z7     +RS        FeedSep/2     Z8    Rdip
GW  3     5    +RS    -FeedSep/2     Z8   DSwp+RS    -YDInr     Z7    Rdip
GW  4     5   DSwp+RS     YDInr        -Z7    +RS        FeedSep/2    -Z8    Rdip
GW  5     5    +RS    -FeedSep/2    -Z8   DSwp+RS    -YDInr    -Z7    Rdip
' LOWER-MIDDLE DIPOLES:
GW  6     5   DSwp+RS     YDOut         Z1      +RS        FeedSep/2     Z2    Rdip
GW  7     5    +RS    -FeedSep/2     Z2   DSwp+RS    -YDOut     Z1    Rdip
GW  8     5   DSwp+RS     YDOut        -Z1      +RS        FeedSep/2    -Z2    Rdip
GW  9     5    +RS    -FeedSep/2    -Z2   DSwp+RS    -YDOut    -Z1    Rdip
' OUTER-MIDDLE DIPOLES:
GW 10     5   DSwp+RS     YDOut         Z11     +RS        FeedSep/2     Z12    Rdip
GW 11     5    +RS    -FeedSep/2     Z12  DSwp+RS   -YDOut     Z11    Rdip
GW 12     5   DSwp+RS     YDOut        -Z11      +RS        FeedSep/2    -Z12    Rdip
GW 13     5    +RS    -FeedSep/2    -Z12  DSwp+RS   -YDOut    -Z11    Rdip
' OUTER DIPOLES:
GW 14     5   DSwp+RS     YDOut         Z21     +RS        FeedSep/2     Z22    Rdip
GW 15     5    +RS    -FeedSep/2     Z22  DSwp+RS   -YDOut     Z21    Rdip
GW 16     5   DSwp+RS     YDOut        -Z21      +RS        FeedSep/2    -Z22    Rdip
GW 17     5    +RS    -FeedSep/2    -Z22  DSwp+RS   -YDOut    -Z21    Rdip
' CENTER FEEDLINE:
GW 18     2    +RS     FeedSep/2     Z8     +RS        FeedSep/2     0.0    Rfeed
GW 19     2    +RS    -FeedSep/2     Z8     +RS       -FeedSep/2     0.0    Rfeed
GW 20     2    +RS     FeedSep/2    -Z8     +RS        FeedSep/2     0.0    Rfeed
GW 21     2     +RS    -FeedSep/2    -Z8     +RS       -FeedSep/2     0.0    Rfeed
' INNER CROSS-OVER FEEDLINE:
GW 22     1    +RS     FeedSep/2     Z2     +RS        FeedSep/2     Z4    Rfeed
GW 23     1    +RS    -FeedSep/2     Z2     +RS       -FeedSep/2     Z4    Rfeed
GW 24     4    +RS     FeedSep/2     Z6     +RS        FeedSep/2     Z8    Rfeed
GW 25     4    +RS    -FeedSep/2     Z6     +RS       -FeedSep/2     Z8    Rfeed
GW 26     1    +RS    -FeedSep/2     Z6   Hop/2+RS   0.0     Z5    Rfeed
GW 27     1    +RS     FeedSep/2     Z4   Hop/2+RS   0.0     Z5    Rfeed
GW 28     1    +RS     FeedSep/2     Z6  -Hop/2+RS   0.0     Z5    Rfeed
GW 29     1    +RS    -FeedSep/2     Z4  -Hop/2+RS   0.0     Z5    Rfeed
GW 30     1    +RS     FeedSep/2    -Z2     +RS        FeedSep/2    -Z4    Rfeed
GW 31     1    +RS    -FeedSep/2    -Z2     +RS       -FeedSep/2    -Z4    Rfeed
GW 32     4    +RS     FeedSep/2    -Z6     +RS        FeedSep/2    -Z8    Rfeed
GW 33     4    +RS    -FeedSep/2    -Z6     +RS       -FeedSep/2    -Z8    Rfeed
GW 34     1    +RS    -FeedSep/2    -Z6  -Hop/2+RS   0.0    -Z5    Rfeed
GW 35     1    +RS     FeedSep/2    -Z4  -Hop/2+RS   0.0    -Z5    Rfeed
GW 36     1    +RS     FeedSep/2    -Z6  +Hop/2+RS   0.0    -Z5    Rfeed
GW 37     1    +RS    -FeedSep/2    -Z4  +Hop/2+RS   0.0    -Z5    Rfeed
' LOWER-MIDDLE CROSS-OVER FEEDLINE:
GW 38     1    +RS     FeedSep/2     Z12     +RS        FeedSep/2     Z14    Rfeed
GW 39     1    +RS    -FeedSep/2     Z12     +RS       -FeedSep/2     Z14    Rfeed
GW 40     1    +RS    -FeedSep/2     Z16   Hop/2+RS  0.0     Z15    Rfeed
GW 41     1    +RS     FeedSep/2     Z14   Hop/2+RS  0.0     Z15    Rfeed
GW 42     1    +RS     FeedSep/2     Z16  -Hop/2+RS  0.0     Z15    Rfeed
GW 43     1    +RS    -FeedSep/2     Z14  -Hop/2+RS  0.0     Z15    Rfeed
GW 44     4    +RS     FeedSep/2     Z16     +RS        FeedSep/2     Z18    Rfeed
GW 45     4    +RS    -FeedSep/2     Z16     +RS       -FeedSep/2     Z18    Rfeed
GW 46     1    +RS     FeedSep/2    -Z12     +RS        FeedSep/2    -Z14    Rfeed
GW 47     1    +RS    -FeedSep/2    -Z12     +RS       -FeedSep/2    -Z14    Rfeed
GW 48     1    +RS    -FeedSep/2    -Z16  -Hop/2+RS  0.0    -Z15    Rfeed
GW 49     1    +RS     FeedSep/2    -Z14  -Hop/2+RS  0.0    -Z15    Rfeed
GW 50     1    +RS     FeedSep/2    -Z16  +Hop/2+RS  0.0    -Z15    Rfeed
GW 51     1    +RS    -FeedSep/2    -Z14  +Hop/2+RS  0.0    -Z15    Rfeed
GW 52     4    +RS     FeedSep/2    -Z16     +RS        FeedSep/2    -Z18    Rfeed
GW 53     4    +RS    -FeedSep/2    -Z16     +RS       -FeedSep/2    -Z18    Rfeed
' OUTER CROSS-OVER FEEDLINE:
GW 54     1    +RS     FeedSep/2     Z22     +RS        FeedSep/2     Z24    Rfeed
GW 55     1    +RS    -FeedSep/2     Z22     +RS       -FeedSep/2     Z24    Rfeed
GW 56     1    +RS    -FeedSep/2     Z26   Hop/2+RS  0.0     Z25    Rfeed
GW 57     1    +RS     FeedSep/2     Z24   Hop/2+RS  0.0     Z25    Rfeed
GW 58     1    +RS     FeedSep/2     Z26  -Hop/2+RS  0.0     Z25    Rfeed
GW 59     1    +RS    -FeedSep/2     Z24  -Hop/2+RS  0.0     Z25    Rfeed
GW 60     4    +RS     FeedSep/2     Z26     +RS        FeedSep/2     Z28    Rfeed
GW 61     4    +RS    -FeedSep/2     Z26     +RS       -FeedSep/2     Z28    Rfeed
GW 62     1    +RS     FeedSep/2    -Z22     +RS        FeedSep/2    -Z24    Rfeed
GW 63     1    +RS    -FeedSep/2    -Z22     +RS       -FeedSep/2    -Z24    Rfeed
GW 64     1    +RS    -FeedSep/2    -Z26  -Hop/2+RS  0.0    -Z25    Rfeed
GW 65     1    +RS     FeedSep/2    -Z24  -Hop/2+RS  0.0    -Z25    Rfeed
GW 66     1    +RS     FeedSep/2    -Z26  +Hop/2+RS  0.0    -Z25    Rfeed
GW 67     1    +RS    -FeedSep/2    -Z24  +Hop/2+RS  0.0    -Z25    Rfeed
GW 68     4    +RS     FeedSep/2    -Z26     +RS        FeedSep/2    -Z28    Rfeed
GW 69     4    +RS    -FeedSep/2    -Z26     +RS       -FeedSep/2    -Z28    Rfeed
'
' UP TO 43 PAIRS OF REFLECTOR RODS:
GW 71 9 0.0 -YRod 20*RR  0.0 -Rgap/2 20*RR  Rrod
GW 72 9 0.0 -YRod 19*RR  0.0 -Rgap/2 19*RR  Rrod
GW 73 9 0.0 -YRod 18*RR  0.0 -Rgap/2 18*RR  Rrod
GW 74 9 0.0 -YRod 17*RR  0.0 -Rgap/2 17*RR  Rrod
GW 75 9 0.0 -YRod 16*RR  0.0 -Rgap/2 16*RR  Rrod
GW 76 9 0.0 -YRod 15*RR  0.0 -Rgap/2 15*RR  Rrod
GW 77 9 0.0 -YRod 14*RR  0.0 -Rgap/2 14*RR  Rrod
GW 78 9 0.0 -YRod 13*RR  0.0 -Rgap/2 13*RR  Rrod
GW 79 9 0.0 -YRod 12*RR  0.0 -Rgap/2 12*RR  Rrod
GW 80 9 0.0 -YRod 11*RR  0.0 -Rgap/2 11*RR  Rrod
GW 81 9 0.0 -YRod 10*RR  0.0 -Rgap/2 10*RR  Rrod
GW 82 9 0.0 -YRod  9*RR  0.0 -Rgap/2  9*RR  Rrod
GW 83 9 0.0 -YRod  8*RR  0.0 -Rgap/2  8*RR  Rrod
GW 84 9 0.0 -YRod  7*RR  0.0 -Rgap/2  7*RR  Rrod
GW 85 9 0.0 -YRod  6*RR  0.0 -Rgap/2  6*RR  Rrod
GW 86 9 0.0 -YRod  5*RR  0.0 -Rgap/2  5*RR  Rrod
GW 87 9 0.0 -YRod  4*RR  0.0 -Rgap/2  4*RR  Rrod
GW 88 9 0.0 -YRod  3*RR  0.0 -Rgap/2  3*RR  Rrod
GW 89 9 0.0 -YRod  2*RR  0.0 -Rgap/2  2*RR  Rrod
GW 90 9 0.0 -YRod  1*RR  0.0 -Rgap/2  1*RR  Rrod
'
GW 101 9 0.0 YRod 20*RR  0.0 Rgap/2 20*RR  Rrod
GW 102 9 0.0 YRod 19*RR  0.0 Rgap/2 19*RR  Rrod
GW 103 9 0.0 YRod 18*RR  0.0 Rgap/2 18*RR  Rrod
GW 104 9 0.0 YRod 17*RR  0.0 Rgap/2 17*RR  Rrod
GW 105 9 0.0 YRod 16*RR  0.0 Rgap/2 16*RR  Rrod
GW 106 9 0.0 YRod 15*RR  0.0 Rgap/2 15*RR  Rrod
GW 107 9 0.0 YRod 14*RR  0.0 Rgap/2 14*RR  Rrod
GW 108 9 0.0 YRod 13*RR  0.0 Rgap/2 13*RR  Rrod
GW 109 9 0.0 YRod 12*RR  0.0 Rgap/2 12*RR  Rrod
GW 100 9 0.0 YRod 11*RR  0.0 Rgap/2 11*RR  Rrod
GW 101 9 0.0 YRod 10*RR  0.0 Rgap/2 10*RR  Rrod
GW 102 9 0.0 YRod  9*RR  0.0 Rgap/2  9*RR  Rrod
GW 103 9 0.0 YRod  8*RR  0.0 Rgap/2  8*RR  Rrod
GW 104 9 0.0 YRod  7*RR  0.0 Rgap/2  7*RR  Rrod
GW 105 9 0.0 YRod  6*RR  0.0 Rgap/2  6*RR  Rrod
GW 106 9 0.0 YRod  5*RR  0.0 Rgap/2  5*RR  Rrod
GW 107 9 0.0 YRod  4*RR  0.0 Rgap/2  4*RR  Rrod
GW 108 9 0.0 YRod  3*RR  0.0 Rgap/2  3*RR  Rrod
GW 109 9 0.0 YRod  2*RR  0.0 Rgap/2  2*RR  Rrod
GW 100 9 0.0 YRod  1*RR  0.0 Rgap/2  1*RR  Rrod
'
GW 111 9 0.0 -YRod  -1*RR 0.0 -Rgap/2   -1*RR Rrod
GW 112 9 0.0 -YRod  -2*RR 0.0 -Rgap/2   -2*RR Rrod
GW 113 9 0.0 -YRod  -3*RR 0.0 -Rgap/2   -3*RR Rrod
GW 114 9 0.0 -YRod  -4*RR 0.0 -Rgap/2   -4*RR Rrod
GW 115 9 0.0 -YRod  -5*RR 0.0 -Rgap/2   -5*RR Rrod
GW 116 9 0.0 -YRod  -6*RR 0.0 -Rgap/2   -6*RR Rrod
GW 117 9 0.0 -YRod  -7*RR 0.0 -Rgap/2   -7*RR Rrod
GW 118 9 0.0 -YRod  -8*RR 0.0 -Rgap/2   -8*RR Rrod
GW 119 9 0.0 -YRod  -9*RR 0.0 -Rgap/2   -9*RR Rrod
GW 120 9 0.0 -YRod -10*RR 0.0 -Rgap/2  -10*RR Rrod
GW 121 9 0.0 -YRod -11*RR 0.0 -Rgap/2  -11*RR Rrod
GW 122 9 0.0 -YRod -12*RR 0.0 -Rgap/2  -12*RR Rrod
GW 123 9 0.0 -YRod -13*RR 0.0 -Rgap/2  -13*RR Rrod
GW 124 9 0.0 -YRod -14*RR 0.0 -Rgap/2  -14*RR Rrod
GW 125 9 0.0 -YRod -15*RR 0.0 -Rgap/2  -15*RR Rrod
GW 126 9 0.0 -YRod -16*RR 0.0 -Rgap/2  -16*RR Rrod
GW 127 9 0.0 -YRod -17*RR 0.0 -Rgap/2  -17*RR Rrod
GW 128 9 0.0 -YRod -18*RR 0.0 -Rgap/2  -18*RR Rrod
GW 129 9 0.0 -YRod -19*RR 0.0 -Rgap/2  -19*RR Rrod
GW 130 9 0.0 -YRod -20*RR 0.0 -Rgap/2  -20*RR Rrod
'
GW 131 9 0.0 YRod  -1*RR 0.0 Rgap/2  -1*RR Rrod
GW 132 9 0.0 YRod  -2*RR 0.0 Rgap/2  -2*RR Rrod
GW 133 9 0.0 YRod  -3*RR 0.0 Rgap/2  -3*RR Rrod
GW 134 9 0.0 YRod  -4*RR 0.0 Rgap/2  -4*RR Rrod
GW 135 9 0.0 YRod  -5*RR 0.0 Rgap/2  -5*RR Rrod
GW 136 9 0.0 YRod  -6*RR 0.0 Rgap/2  -6*RR Rrod
GW 137 9 0.0 YRod  -7*RR 0.0 Rgap/2  -7*RR Rrod
GW 138 9 0.0 YRod  -8*RR 0.0 Rgap/2  -8*RR Rrod
GW 139 9 0.0 YRod  -9*RR 0.0 Rgap/2  -9*RR Rrod
GW 140 9 0.0 YRod -10*RR 0.0 Rgap/2 -10*RR Rrod
GW 141 9 0.0 YRod -11*RR 0.0 Rgap/2 -11*RR Rrod
GW 142 9 0.0 YRod -12*RR 0.0 Rgap/2 -12*RR Rrod
GW 143 9 0.0 YRod -13*RR 0.0 Rgap/2 -13*RR Rrod
GW 144 9 0.0 YRod -14*RR 0.0 Rgap/2 -14*RR Rrod
GW 145 9 0.0 YRod -15*RR 0.0 Rgap/2 -15*RR Rrod
GW 146 9 0.0 YRod -16*RR 0.0 Rgap/2 -16*RR Rrod
GW 147 9 0.0 YRod -17*RR 0.0 Rgap/2 -17*RR Rrod
GW 148 9 0.0 YRod -18*RR 0.0 Rgap/2 -18*RR Rrod
GW 149 9 0.0 YRod -19*RR 0.0 Rgap/2 -19*RR Rrod
GW 150 9 0.0 YRod -20*RR 0.0 Rgap/2 -20*RR Rrod
'
GW 151 9 0.0 -YRod    0.0   0.0 -Rgap/2  0.0   Rrod    ' CENTER RR
GW 152 9 0.0  Rgap/2  0.0   0.0  YRod    0.0   Rrod    ' CENTER RR
'
GS 0 0 0.0254            ' CONVERT ABOVE FROM INCHES TO METERS FOR NEC.
GE 0                ' No Ground Plane
GN -1                ' Free Space
EK 0                ' Enable Extended Kernel
LD 5 0 0 0 Cond 0        ' Conductivity
EX 0 1 1 0 1 0        ' SOURCE on GW1, seg 1
'
' FR Freq Sweep choices in order of increasing calculation time (fm holl_ands):
FR 0 29 0 0 470 12      ' Freq Sweep 470-806 every 12 MHz - OLD UHF BAND
' FR 0 39 0 0 470 6        ' Freq Sweep 470-698 every 6 MHz - PREFERRED FOR UHF
' FR 0 77 0 0 470 3        ' Freq Sweep 470-698 every 3 MHz
' FR 0 153 0 0 470 1.5    ' Freq Sweep 470-698 every 1.5 MHz
' FR 0 71 0 0 300 10    ' Freq Sweep 300-1000 every 10 MHz - WIDEBAND SWEEP
' FR Hi-VHF choices:
' FR 0 15 0 0 174 3        ' Freq Sweep 174-216 every 3 MHz
' FR 0 29 0 0 174 1.5    ' Freq Sweep 174-216 every 1.5 MHz - PREFERRED
' FR 0 43 0 0 174 1        ' Freq Sweep 174-216 every 1 MHz - Hi-Rez
' FR 0 26 0 0 150 6        ' Freq Sweep 150-300 every 6 MHz - WIDEBAND SWEEP
' FR Lo-VHF choices:
' FR 0 19 0 0 54 3        ' Frequency Sweep every 3 MHz for Ch2-6 + FM
' FR 0 35 0 0 54 1        ' Frequency Sweep every 1 MHz for Ch2-6
' FR 0 36 0 0 75 1        ' Frequency Sweep every 1 MHz for Ch5 + Ch6 + FM
' RP choices in order of increasing calculation time:
' RP 0 1 1 1510 90 0 1 1 0 0    ' 1D Gain toward 90-deg Azimuth
' RP 0 1 37 1510 90 0 1 5 0 0     ' 2D (Left only) Azimuthal Gain Slice
RP 0 1 73 1510 90 0 1 5 0 0      ' 2D Azimuthal Gain Slice - PREFERRED
' RP 0 73 1 1510 90 0 5 1 0 0     ' 2D Elevation Gain Slice
' RP 0 73 73 1510 90 0 5 5 0 0     ' 3D Lower Hemisphere reveals antenna
' RP 0 285 73 1510 90 0 5 5 0 0    ' 3D Full Coverage obscures antenna
EN
 
#14 ·
Lawrence, Very good antenna info, thanks for the NEC file!!

The design modified to work of 470mhz to 614mhz made of 1" tubing.
The Lengths in the file of MmanaGal are in meter

HTML:
Freq(MHz) R(Ohm)  jX(Ohm)  SWR(300.0Ohm) Ga(dBi)  F/B(dB)
470.0     396.3   152.41   1.68          9.6      18.57
518.0     442.99  44.01    1.5           9.77     16.16
566.0     403.23  -13.17   1.35          10.06    13.94
614.0     370.11  6.49     1.23          10.31    10.76
MMANA-GAL basic is freeware an antenna-analyzing tool based on the moment method (MmanaGal-Basic Wires max. 512)
http://hamsoft.ca/pages/mmana-gal.php

Copy and paste in an editor of text and save as...( biQuad_feed.maa )

.maa file below.

Code:
BiQuad_Feed_Antenna_UHF
*
470.0
***Wires***
25
0.0,	-0.0143,	0.0,	0.0,	0.0143,	0.0,	0.0016,	-1
0.0,	0.0143,	0.0,	0.0,	0.04939,	0.0,	0.00254,	-1
0.0,	0.04939,	0.0,	0.0,	0.1403,	0.0898,	0.0127,	-1
0.0,	0.1403,	0.0898,	0.0,	0.0,	0.2301,	0.0127,	-1
0.0,	0.0,	0.2301,	0.0,	-0.1403,	0.0898,	0.0127,	-1
0.0,	-0.1403,	0.0898,	0.0,	-0.04939,	0.0,	0.0127,	-1
0.0,	-0.04939,	0.0,	0.0,	-0.0143,	0.0,	0.00254,	-1
0.0,	0.04939,	0.0,	0.0,	0.1403,	-0.0898,	0.0127,	-1
0.0,	0.1403,	-0.0898,	0.0,	0.0,	-0.2301,	0.0127,	-1
0.0,	0.0,	-0.2301,	0.0,	-0.1403,	-0.0898,	0.0127,	-1
0.0,	-0.1403,	-0.0898,	0.0,	-0.04939,	0.0,	0.0127,	-1
-0.1207,	0.0,	-0.0953,	-0.1207,	0.2762,	-0.0953,	0.0127,	-1
-0.1207,	0.0,	-0.0953,	-0.1207,	-0.2762,	-0.0953,	0.0127,	-1
-0.1207,	0.0,	0.0953,	-0.1207,	0.2762,	0.0953,	0.0127,	-1
-0.1207,	0.0,	0.0953,	-0.1207,	-0.2762,	0.0953,	0.0127,	-1
-0.1207,	-0.2762,	0.0953,	-0.1207,	-0.2762,	-0.0953,	0.0127,	-1
-0.1207,	0.2762,	0.0953,	-0.1207,	0.2762,	-0.0953,	0.0127,	-1
-0.1207,	0.0,	-0.0953,	-0.1207,	0.0,	-0.2334,	0.0127,	-1
-0.1207,	0.0,	-0.2334,	-0.1207,	-0.1587,	-0.2334,	0.0127,	-1
-0.1207,	0.0,	-0.2334,	-0.1207,	0.1587,	-0.2334,	0.0127,	-1
-0.1207,	0.0,	0.0953,	-0.1207,	0.0,	0.2334,	0.0127,	-1
-0.1207,	0.0,	0.2334,	-0.1207,	-0.1587,	0.2334,	0.0127,	-1
-0.1207,	0.0,	0.2334,	-0.1207,	0.1587,	0.2334,	0.0127,	-1
0.0,	0.0,	0.2301,	-0.1207,	0.0,	0.2334,	0.003175,	-1
0.0,	0.0,	-0.2301,	-0.1207,	0.0,	-0.2334,	0.003175,	-1
***Source***
1,	0
w1c,	0.0,	1.0
***Load***
0,	0
***Segmentation***
800,	80,	2.0,	2
***G/H/M/R/AzEl/X***
0,	15.0,	4,	300.0,	120,	60,	0.0


Draw dimension in inch.
 
#15 ·
Schoolbus

Fat tubing elements in antenna 4-bay to cover 470mhz to 614mhz
Simulate in Mmanagal antenna-analyzing tool
I haven't done the testing

HTML:
Freq(MHz) R(Ohm)  jX(Ohm)  SWR(300.0Ohm)  Ga(dBi)  F/B(dB)
470	  261.25  66.62	   1.32	          12.86	   17.93
518	  243.91  106.88   1.56	          13.54	   16.93
566	  323.64  167.68   1.71	          14.28	   16.17
614	  525.53  125.64   1.9	          14.5	   17.4
.maa file below.
Code:
Fat_Dipole_4bay_antenna_uhf
*
470.0
***Wires***
55
0.0,	0.0159,	0.381,	0.0,	0.2413,	0.381,	0.0127,	-1
0.0,	-0.0159,	0.381,	0.0,	-0.2413,	0.381,	0.0127,	-1
0.0,	0.0159,	0.127,	0.0,	0.2413,	0.127,	0.0127,	-1
0.0,	-0.0159,	0.127,	0.0,	-0.2413,	0.127,	0.0127,	-1
0.0,	0.0159,	-0.127,	0.0,	0.2413,	-0.127,	0.0127,	-1
0.0,	-0.0159,	-0.127,	0.0,	-0.2413,	-0.127,	0.0127,	-1
0.0,	0.0159,	-0.381,	0.0,	0.2413,	-0.381,	0.0127,	-1
0.0,	-0.0159,	-0.381,	0.0,	-0.2413,	-0.381,	0.0127,	-1
0.0,	0.0159,	0.0,	0.0,	0.0159,	0.127,	0.00162,	-1
0.0,	0.0159,	0.127,	0.0,	0.0159,	0.3016,	0.00162,	-1
0.0,	0.0159,	0.3016,	0.0064,	0.0,	0.3175,	0.00162,	-1
0.0064,	0.0,	0.3175,	0.0,	-0.0159,	0.3334,	0.00162,	-1
0.0,	-0.0159,	0.3334,	0.0,	-0.0159,	0.381,	0.00162,	-1
0.0,	0.0159,	0.0,	0.0,	0.0159,	-0.127,	0.00162,	-1
0.0,	0.0159,	-0.127,	0.0,	0.0159,	-0.3016,	0.00162,	-1
0.0,	0.0159,	-0.3016,	0.0064,	0.0,	-0.3175,	0.00162,	-1
0.0064,	0.0,	-0.3175,	0.0,	-0.0159,	-0.3334,	0.00162,	-1
0.0,	-0.0159,	-0.3334,	0.0,	-0.0159,	-0.381,	0.00162,	-1
0.0,	-0.0159,	0.0,	0.0,	-0.0159,	0.127,	0.00162,	-1
0.0,	-0.0159,	0.127,	0.0,	-0.0159,	0.3016,	0.00162,	-1
0.0,	-0.0159,	0.3016,	-0.0064,	0.0,	0.3175,	0.00162,	-1
-0.0064,	0.0,	0.3175,	0.0,	0.0159,	0.3334,	0.00162,	-1
0.0,	0.0159,	0.3334,	0.0,	0.0159,	0.381,	0.00162,	-1
0.0,	-0.0159,	0.0,	0.0,	-0.0159,	-0.127,	0.00162,	-1
0.0,	-0.0159,	-0.127,	0.0,	-0.0159,	-0.3016,	0.00162,	-1
0.0,	-0.0159,	-0.3016,	-0.0064,	0.0,	-0.3175,	0.00162,	-1
-0.0064,	0.0,	-0.3175,	0.0,	0.0159,	-0.3334,	0.00162,	-1
0.0,	0.0159,	-0.3334,	0.0,	0.0159,	-0.381,	0.00162,	-1
0.0,	-0.0159,	0.0,	0.0,	0.0159,	0.0,	0.00162,	-1
-0.1524,	0.0,	0.508,	-0.1524,	0.3683,	0.508,	0.0127,	-1
-0.1524,	0.0,	0.508,	-0.1524,	-0.3683,	0.508,	0.0127,	-1
-0.1524,	0.0,	0.381,	-0.1524,	0.3683,	0.381,	0.0127,	-1
-0.1524,	0.0,	0.381,	-0.1524,	-0.3683,	0.381,	0.0127,	-1
-0.1524,	0.0,	0.254,	-0.1524,	0.3683,	0.254,	0.0127,	-1
-0.1524,	0.0,	0.254,	-0.1524,	-0.3683,	0.254,	0.0127,	-1
-0.1524,	0.0,	0.127,	-0.1524,	0.3683,	0.127,	0.0127,	-1
-0.1524,	0.0,	0.127,	-0.1524,	-0.3683,	0.127,	0.0127,	-1
-0.1524,	0.0,	0.0,	-0.1524,	0.3683,	0.0,	0.0127,	-1
-0.1524,	0.0,	0.0,	-0.1524,	-0.3683,	0.0,	0.0127,	-1
-0.1524,	0.0,	-0.127,	-0.1524,	0.3683,	-0.127,	0.0127,	-1
-0.1524,	0.0,	-0.127,	-0.1524,	-0.3683,	-0.127,	0.0127,	-1
-0.1524,	0.0,	-0.254,	-0.1524,	0.3683,	-0.254,	0.0127,	-1
-0.1524,	0.0,	-0.254,	-0.1524,	-0.3683,	-0.254,	0.0127,	-1
-0.1524,	0.0,	-0.381,	-0.1524,	0.3683,	-0.381,	0.0127,	-1
-0.1524,	0.0,	-0.381,	-0.1524,	-0.3683,	-0.381,	0.0127,	-1
-0.1524,	0.0,	-0.508,	-0.1524,	0.3683,	-0.508,	0.0127,	-1
-0.1524,	0.0,	-0.508,	-0.1524,	-0.3683,	-0.508,	0.0127,	-1
-0.129,	0.0,	0.3175,	-0.129,	0.0,	0.5271,	0.0127,	-1
-0.0286,	0.0,	0.3175,	-0.0286,	0.0,	0.4,	0.0127,	-1
-0.129,	0.0,	-0.5271,	-0.129,	0.0,	-0.3175,	0.0127,	-1
-0.129,	0.0,	-0.3175,	-0.129,	0.0,	0.3175,	0.0127,	-1
-0.0286,	0.0,	-0.4,	-0.0286,	0.0,	-0.3175,	0.0127,	-1
-0.0286,	0.0,	-0.3175,	-0.0286,	0.0,	0.3175,	0.0127,	-1
-0.0286,	0.0,	0.3175,	-0.129,	0.0,	0.3175,	0.0031,	-1
-0.0286,	0.0,	-0.3175,	-0.129,	0.0,	-0.3175,	0.0031,	-1
***Source***
1,	0
w29c,	0.0,	1.0
***Load***
0,	0
***Segmentation***
800,	80,	2.0,	2
***G/H/M/R/AzEl/X***
0,	15.0,	4,	300.0,	120,	60,	0.0


Draw dimension in inch
 
#16 · (Edited)
Fat tubing elements in antenna 4-bay to cover 470mhz to 614mhz
Simulate in Mmanagal antenna-analyzing tool
I haven't done the testing

HTML:
Freq(MHz) R(Ohm)  jX(Ohm)  SWR(300.0Ohm)  Ga(dBi)  F/B(dB)
470	  261.25  66.62	   1.32	          12.86	   17.93
518	  243.91  106.88   1.56	          13.54	   16.93
566	  323.64  167.68   1.71	          14.28	   16.17
614	  525.53  125.64   1.9	          14.5	   17.4
Nice design, jop. That's just what I had in mind in post #6, but scaled for the new UHF band.



Do I have your permission to show your antenna design with your credit line in a post?
 
#20 · (Edited)
Major Tom,
Thank-you! Looks like the rescaled 8 bay fat dipole has an extra .5 to 1 full DB improvement,
(across the new UHF Spectrum) over Hollands original 8 Bay Fat dipole.

I think I will build it!
2 questions:

1. How and where do I paste in the NEC program script in my computer files/4NEc2 App?, so I can pull up all the dimensions and spacing?
2. Does it matter if I use those rods or can I just use fencing as a reflector? Does it change the results.

Thanks!
Schoolbus
 
#21 ·
In post #12, did you click on the Model Link?
To get dimensions you do it right from the web using nikiml's Model Viewer.
If you search this forum and probably nikiml's site, you'll find instructions on how to
navigate the model viewer such that you could actually build it.
 
#22 ·
Hi,
I input those numbers for MajorTom's modified Fat Dipole Antenna.
It sets up nicely in the NEC2 viewer.

But,
Is it possible to reduce the number of reflectors, with perhaps only a minor loss of performance?

It does have a LOT of reflectors.

Schoolbus
 
#24 ·
Quote:
Originally Posted by Schoolbus

Wouldnt it have a better average GAin, across the new spectrum (ie- a higher gain at the low UHF end)
to have GAin peak at mid-spectrum?
An attempt and variation + - estimation 1dBi
mid-spectrum 539 MHz
arrive to 551 MHz =14.63 dBi SWR 1.81 with loss in 608 MHz SWR 2.15

antenna-analyzing tool MMANA-GAL basic

Drawing

.maa file below.
Code:
Code:
Fat_Dipole_4bay_antenna_uhf_vE1
*
470.0
***Wires***
59
0.0,	0.0254,	0.381,	0.0,	0.2794,	0.381,	0.0127,	-1
0.0,	-0.0254,	0.381,	0.0,	-0.2794,	0.381,	0.0127,	-1
0.0,	0.0254,	0.127,	0.0,	0.2794,	0.127,	0.0127,	-1
0.0,	-0.0254,	0.127,	0.0,	-0.2794,	0.127,	0.0127,	-1
0.0,	0.0254,	-0.127,	0.0,	0.2794,	-0.127,	0.0127,	-1
0.0,	-0.0254,	-0.127,	0.0,	-0.2794,	-0.127,	0.0127,	-1
0.0,	0.0254,	-0.381,	0.0,	0.2794,	-0.381,	0.0127,	-1
0.0,	-0.0254,	-0.381,	0.0,	-0.2794,	-0.381,	0.0127,	-1
0.0,	0.0254,	0.0,	0.0,	0.0254,	0.127,	0.00162,	-1
0.0,	0.0254,	0.127,	0.0,	0.0254,	0.2492,	0.00162,	-1
0.0,	0.0254,	0.2492,	0.0064,	0.0,	0.2746,	0.00162,	-1
0.0064,	0.0,	0.2746,	0.0,	-0.0254,	0.3,	0.00162,	-1
0.0,	-0.0254,	0.3,	0.0,	-0.0254,	0.381,	0.00162,	-1
0.0,	0.0254,	0.0,	0.0,	0.0254,	-0.127,	0.00162,	-1
0.0,	0.0254,	-0.127,	0.0,	0.0254,	-0.2492,	0.00162,	-1
0.0,	0.0254,	-0.2492,	0.0064,	0.0,	-0.2746,	0.00162,	-1
0.0064,	0.0,	-0.2746,	0.0,	-0.0254,	-0.3,	0.00162,	-1
0.0,	-0.0254,	-0.3,	0.0,	-0.0254,	-0.381,	0.00162,	-1
0.0,	-0.0254,	0.0,	0.0,	-0.0254,	0.127,	0.00162,	-1
0.0,	-0.0254,	0.127,	0.0,	-0.0254,	0.2492,	0.00162,	-1
0.0,	-0.0254,	0.2492,	-0.0064,	0.0,	0.2746,	0.00162,	-1
-0.0064,	0.0,	0.2746,	0.0,	0.0254,	0.3,	0.00162,	-1
0.0,	0.0254,	0.3,	0.0,	0.0254,	0.381,	0.00162,	-1
0.0,	-0.0254,	0.0,	0.0,	-0.0254,	-0.127,	0.00162,	-1
0.0,	-0.0254,	-0.127,	0.0,	-0.0254,	-0.2492,	0.00162,	-1
0.0,	-0.0254,	-0.2492,	-0.0064,	0.0,	-0.2746,	0.00162,	-1
-0.0064,	0.0,	-0.2746,	0.0,	0.0254,	-0.3,	0.00162,	-1
0.0,	0.0254,	-0.3,	0.0,	0.0254,	-0.381,	0.00162,	-1
0.0,	-0.0254,	0.0,	0.0,	0.0254,	0.0,	0.00162,	-1
-0.1524,	0.0,	0.508,	-0.1524,	0.381,	0.508,	0.0127,	-1
-0.1524,	0.0,	0.508,	-0.1524,	-0.381,	0.508,	0.0127,	-1
-0.1524,	0.0,	0.3048,	-0.1524,	0.381,	0.3048,	0.0127,	-1
-0.1524,	0.0,	0.3048,	-0.1524,	-0.381,	0.3048,	0.0127,	-1
-0.1524,	0.0,	0.2032,	-0.1524,	0.381,	0.2032,	0.0127,	-1
-0.1524,	0.0,	0.2032,	-0.1524,	-0.381,	0.2032,	0.0127,	-1
-0.1524,	0.0,	0.1016,	-0.1524,	0.381,	0.1016,	0.0127,	-1
-0.1524,	0.0,	0.1016,	-0.1524,	-0.381,	0.1016,	0.0127,	-1
-0.1524,	0.0,	0.0,	-0.1524,	0.381,	0.0,	0.0127,	-1
-0.1524,	0.0,	0.0,	-0.1524,	-0.381,	0.0,	0.0127,	-1
-0.1524,	0.0,	-0.1016,	-0.1524,	0.381,	-0.1016,	0.0127,	-1
-0.1524,	0.0,	-0.1016,	-0.1524,	-0.381,	-0.1016,	0.0127,	-1
-0.1524,	0.0,	-0.2032,	-0.1524,	0.381,	-0.2032,	0.0127,	-1
-0.1524,	0.0,	-0.2032,	-0.1524,	-0.381,	-0.2032,	0.0127,	-1
-0.1524,	0.0,	-0.3048,	-0.1524,	0.381,	-0.3048,	0.0127,	-1
-0.1524,	0.0,	-0.3048,	-0.1524,	-0.381,	-0.3048,	0.0127,	-1
-0.1524,	0.0,	-0.508,	-0.1524,	0.381,	-0.508,	0.0127,	-1
-0.1524,	0.0,	-0.508,	-0.1524,	-0.381,	-0.508,	0.0127,	-1
-0.129,	0.0,	0.254,	-0.129,	0.0,	0.5271,	0.0127,	-1
-0.0286,	0.0,	0.254,	-0.0286,	0.0,	0.4,	0.0127,	-1
-0.129,	0.0,	-0.5271,	-0.129,	0.0,	-0.254,	0.0127,	-1
-0.129,	0.0,	-0.254,	-0.129,	0.0,	0.254,	0.0127,	-1
-0.0286,	0.0,	-0.4,	-0.0286,	0.0,	-0.254,	0.0127,	-1
-0.0286,	0.0,	-0.254,	-0.0286,	0.0,	0.254,	0.0127,	-1
-0.0286,	0.0,	0.254,	-0.129,	0.0,	0.254,	0.0031,	-1
-0.0286,	0.0,	-0.254,	-0.129,	0.0,	-0.254,	0.0031,	-1
-0.1524,	0.0,	0.4064,	-0.1524,	0.381,	0.4064,	0.0127,	-1
-0.1524,	0.0,	0.4064,	-0.1524,	-0.381,	0.4064,	0.0127,	-1
-0.1524,	0.0,	-0.4064,	-0.1524,	0.381,	-0.4064,	0.0127,	-1
-0.1524,	0.0,	-0.4064,	-0.1524,	-0.381,	-0.4064,	0.0127,	-1
***Source***
1,	0
w29c,	0.0,	1.0
***Load***
0,	0
***Segmentation***
800,	80,	2.0,	2
***G/H/M/R/AzEl/X***
0,	15.0,	4,	300.0,	120,	60,	0.0
 
#25 ·
An attempt and variation + - estimation 1dBi
mid-spectrum 539 MHz
arrive to 551 MHz =14.63 dBi SWR 1.81 with loss in 608 MHz SWR 2.15

antenna-analyzing tool MMANA-GAL basic

Drawing
Thank you for rescaling your design to 10" length x 10" vertical spacing for 1" tubing; that looks good for 14-36.
 
#26 ·
correction to 608 Mhz

Quote:
Originally Posted by Schoolbus

Wondering, your antenna peaks at 612, which is actually out of the new spectrum, which ends at 608.

Also, a couple more reflector elements would help reflect some of that lost signal (some signal is being lost as indicated by the beam plot, with lobes behind)
correction of antenna 608 MHz. peak gain 14.57 dBi @ 607 MHz
yes help + 2 reflector

antenna-analyzing tool MMANA-GAL basic

Drawing

.maa file below.
Code:
Code:
Fat_Dipole_4bay_antenna_uhf_v2
*
470.0
***Wires***
59
0.0,	0.0159,	0.381,	0.0,	0.2477,	0.381,	0.0127,	-1
0.0,	-0.0159,	0.381,	0.0,	-0.2477,	0.381,	0.0127,	-1
0.0,	0.0159,	0.127,	0.0,	0.2477,	0.127,	0.0127,	-1
0.0,	-0.0159,	0.127,	0.0,	-0.2477,	0.127,	0.0127,	-1
0.0,	0.0159,	-0.128,	0.0,	0.2477,	-0.127,	0.0127,	-1
0.0,	-0.0159,	-0.127,	0.0,	-0.2477,	-0.127,	0.0127,	-1
0.0,	0.0159,	-0.381,	0.0,	0.2477,	-0.381,	0.0127,	-1
0.0,	-0.0159,	-0.381,	0.0,	-0.2477,	-0.381,	0.0127,	-1
0.0,	0.0159,	0.0,	0.0,	0.0159,	0.127,	0.00162,	-1
0.0,	0.0159,	0.127,	0.0,	0.0159,	0.2858,	0.00162,	-1
0.0,	0.0159,	0.2858,	0.0064,	0.0,	0.3016,	0.00162,	-1
0.0064,	0.0,	0.3016,	0.0,	-0.0159,	0.3175,	0.00162,	-1
0.0,	-0.0159,	0.3175,	0.0,	-0.0159,	0.381,	0.00162,	-1
0.0,	0.0159,	0.0,	0.0,	0.0159,	-0.128,	0.00162,	-1
0.0,	0.0159,	-0.128,	0.0,	0.0159,	-0.2858,	0.00162,	-1
0.0,	0.0159,	-0.2858,	0.0064,	0.0,	-0.3016,	0.00162,	-1
0.0064,	0.0,	-0.3016,	0.0,	-0.0159,	-0.3175,	0.00162,	-1
0.0,	-0.0159,	-0.3175,	0.0,	-0.0159,	-0.381,	0.00162,	-1
0.0,	-0.0159,	0.0,	0.0,	-0.0159,	0.127,	0.00162,	-1
0.0,	-0.0159,	0.127,	0.0,	-0.0159,	0.2858,	0.00162,	-1
0.0,	-0.0159,	0.2858,	-0.0064,	0.0,	0.3016,	0.00162,	-1
-0.0064,	0.0,	0.3016,	0.0,	0.0159,	0.3175,	0.00162,	-1
0.0,	0.0159,	0.3175,	0.0,	0.0159,	0.381,	0.00162,	-1
0.0,	-0.0159,	0.0,	0.0,	-0.0159,	-0.127,	0.00162,	-1
0.0,	-0.0159,	-0.127,	0.0,	-0.0159,	-0.2858,	0.00162,	-1
0.0,	-0.0159,	-0.2858,	-0.0064,	0.0,	-0.3016,	0.00162,	-1
-0.0064,	0.0,	-0.3016,	0.0,	0.0159,	-0.3175,	0.00162,	-1
0.0,	0.0159,	-0.3175,	0.0,	0.0159,	-0.381,	0.00162,	-1
0.0,	-0.0159,	0.0,	0.0,	0.0159,	0.0,	0.00162,	-1
-0.1524,	0.0,	0.508,	-0.1524,	0.3778,	0.508,	0.0127,	-1
-0.1524,	0.0,	0.508,	-0.1524,	-0.3778,	0.508,	0.0127,	-1
-0.1524,	0.0,	0.3048,	-0.1524,	0.3778,	0.3048,	0.0127,	-1
-0.1524,	0.0,	0.3048,	-0.1524,	-0.3778,	0.3048,	0.0127,	-1
-0.1524,	0.0,	0.2032,	-0.1524,	0.3778,	0.2032,	0.0127,	-1
-0.1524,	0.0,	0.2032,	-0.1524,	-0.3778,	0.2032,	0.0127,	-1
-0.1524,	0.0,	0.1016,	-0.1524,	0.3778,	0.1016,	0.0127,	-1
-0.1524,	0.0,	0.1016,	-0.1524,	-0.3778,	0.1016,	0.0127,	-1
-0.1524,	0.0,	0.0,	-0.1524,	0.3778,	0.0,	0.0127,	-1
-0.1524,	0.0,	0.0,	-0.1524,	-0.3778,	0.0,	0.0127,	-1
-0.1524,	0.0,	-0.1016,	-0.1524,	0.3778,	-0.1016,	0.0127,	-1
-0.1524,	0.0,	-0.1016,	-0.1524,	-0.3778,	-0.1016,	0.0127,	-1
-0.1524,	0.0,	-0.2032,	-0.1524,	0.3778,	-0.2032,	0.0127,	-1
-0.1524,	0.0,	-0.2032,	-0.1524,	-0.3778,	-0.2032,	0.0127,	-1
-0.1524,	0.0,	-0.3048,	-0.1524,	0.3778,	-0.3048,	0.0127,	-1
-0.1524,	0.0,	-0.3048,	-0.1524,	-0.3778,	-0.3048,	0.0127,	-1
-0.1524,	0.0,	-0.508,	-0.1524,	0.3778,	-0.508,	0.0127,	-1
-0.1524,	0.0,	-0.508,	-0.1524,	-0.3778,	-0.508,	0.0127,	-1
-0.129,	0.0,	0.254,	-0.129,	0.0,	0.5271,	0.0127,	-1
-0.0286,	0.0,	0.254,	-0.0286,	0.0,	0.4,	0.0127,	-1
-0.129,	0.0,	-0.5271,	-0.129,	0.0,	-0.254,	0.0127,	-1
-0.129,	0.0,	-0.254,	-0.129,	0.0,	0.254,	0.0127,	-1
-0.0286,	0.0,	-0.4,	-0.0286,	0.0,	-0.254,	0.0127,	-1
-0.0286,	0.0,	-0.254,	-0.0286,	0.0,	0.254,	0.0127,	-1
-0.0286,	0.0,	0.254,	-0.129,	0.0,	0.254,	0.0031,	-1
-0.0286,	0.0,	-0.254,	-0.129,	0.0,	-0.254,	0.0031,	-1
-0.1524,	0.0,	0.4064,	-0.1524,	0.3778,	0.4064,	0.0127,	-1
-0.1524,	0.0,	0.4064,	-0.1524,	-0.3778,	0.4064,	0.0127,	-1
-0.1524,	0.0,	-0.4064,	-0.1524,	0.3778,	-0.4064,	0.0127,	-1
-0.1524,	0.0,	-0.4064,	-0.1524,	-0.3778,	-0.4064,	0.0127,	-1
***Source***
1,	0
w29c,	0.0,	1.0
***Load***
0,	0
***Segmentation***
800,	80,	2.0,	2
***G/H/M/R/AzEl/X***
0,	15.0,	4,	300.0,	120,	60,	0.0
 
#28 ·
Hello,
When I tried opening the code instructions for this 4 Bay antenna with NEC2, (saved as a text file, also tried it as a Word doc and also as an RTF doc):
I get a lot a lot of error messages ("Parsen syntax error" etc etc) and the antenna does not come up on the viewer, only 3 lines showing X Y Z axis are showing.

Any ideas?
Schoolbus


correction to 608 Mhz

Quote:
Originally Posted by Schoolbus



correction of antenna 608 MHz. peak gain 14.57 dBi @ 607 MHz
yes help + 2 reflector

antenna-analyzing tool MMANA-GAL basic

Drawing

.maa file below.
Code:
Code:
Fat_Dipole_4bay_antenna_uhf_v2
*
470.0
***Wires***
59
0.0,    0.0159,    0.381,    0.0,    0.2477,    0.381,    0.0127,    -1
0.0,    -0.0159,    0.381,    0.0,    -0.2477,    0.381,    0.0127,    -1
0.0,    0.0159,    0.127,    0.0,    0.2477,    0.127,    0.0127,    -1
0.0,    -0.0159,    0.127,    0.0,    -0.2477,    0.127,    0.0127,    -1
0.0,    0.0159,    -0.128,    0.0,    0.2477,    -0.127,    0.0127,    -1
0.0,    -0.0159,    -0.127,    0.0,    -0.2477,    -0.127,    0.0127,    -1
0.0,    0.0159,    -0.381,    0.0,    0.2477,    -0.381,    0.0127,    -1
0.0,    -0.0159,    -0.381,    0.0,    -0.2477,    -0.381,    0.0127,    -1
0.0,    0.0159,    0.0,    0.0,    0.0159,    0.127,    0.00162,    -1
0.0,    0.0159,    0.127,    0.0,    0.0159,    0.2858,    0.00162,    -1
0.0,    0.0159,    0.2858,    0.0064,    0.0,    0.3016,    0.00162,    -1
0.0064,    0.0,    0.3016,    0.0,    -0.0159,    0.3175,    0.00162,    -1
0.0,    -0.0159,    0.3175,    0.0,    -0.0159,    0.381,    0.00162,    -1
0.0,    0.0159,    0.0,    0.0,    0.0159,    -0.128,    0.00162,    -1
0.0,    0.0159,    -0.128,    0.0,    0.0159,    -0.2858,    0.00162,    -1
0.0,    0.0159,    -0.2858,    0.0064,    0.0,    -0.3016,    0.00162,    -1
0.0064,    0.0,    -0.3016,    0.0,    -0.0159,    -0.3175,    0.00162,    -1
0.0,    -0.0159,    -0.3175,    0.0,    -0.0159,    -0.381,    0.00162,    -1
0.0,    -0.0159,    0.0,    0.0,    -0.0159,    0.127,    0.00162,    -1
0.0,    -0.0159,    0.127,    0.0,    -0.0159,    0.2858,    0.00162,    -1
0.0,    -0.0159,    0.2858,    -0.0064,    0.0,    0.3016,    0.00162,    -1
-0.0064,    0.0,    0.3016,    0.0,    0.0159,    0.3175,    0.00162,    -1
0.0,    0.0159,    0.3175,    0.0,    0.0159,    0.381,    0.00162,    -1
0.0,    -0.0159,    0.0,    0.0,    -0.0159,    -0.127,    0.00162,    -1
0.0,    -0.0159,    -0.127,    0.0,    -0.0159,    -0.2858,    0.00162,    -1
0.0,    -0.0159,    -0.2858,    -0.0064,    0.0,    -0.3016,    0.00162,    -1
-0.0064,    0.0,    -0.3016,    0.0,    0.0159,    -0.3175,    0.00162,    -1
0.0,    0.0159,    -0.3175,    0.0,    0.0159,    -0.381,    0.00162,    -1
0.0,    -0.0159,    0.0,    0.0,    0.0159,    0.0,    0.00162,    -1
-0.1524,    0.0,    0.508,    -0.1524,    0.3778,    0.508,    0.0127,    -1
-0.1524,    0.0,    0.508,    -0.1524,    -0.3778,    0.508,    0.0127,    -1
-0.1524,    0.0,    0.3048,    -0.1524,    0.3778,    0.3048,    0.0127,    -1
-0.1524,    0.0,    0.3048,    -0.1524,    -0.3778,    0.3048,    0.0127,    -1
-0.1524,    0.0,    0.2032,    -0.1524,    0.3778,    0.2032,    0.0127,    -1
-0.1524,    0.0,    0.2032,    -0.1524,    -0.3778,    0.2032,    0.0127,    -1
-0.1524,    0.0,    0.1016,    -0.1524,    0.3778,    0.1016,    0.0127,    -1
-0.1524,    0.0,    0.1016,    -0.1524,    -0.3778,    0.1016,    0.0127,    -1
-0.1524,    0.0,    0.0,    -0.1524,    0.3778,    0.0,    0.0127,    -1
-0.1524,    0.0,    0.0,    -0.1524,    -0.3778,    0.0,    0.0127,    -1
-0.1524,    0.0,    -0.1016,    -0.1524,    0.3778,    -0.1016,    0.0127,    -1
-0.1524,    0.0,    -0.1016,    -0.1524,    -0.3778,    -0.1016,    0.0127,    -1
-0.1524,    0.0,    -0.2032,    -0.1524,    0.3778,    -0.2032,    0.0127,    -1
-0.1524,    0.0,    -0.2032,    -0.1524,    -0.3778,    -0.2032,    0.0127,    -1
-0.1524,    0.0,    -0.3048,    -0.1524,    0.3778,    -0.3048,    0.0127,    -1
-0.1524,    0.0,    -0.3048,    -0.1524,    -0.3778,    -0.3048,    0.0127,    -1
-0.1524,    0.0,    -0.508,    -0.1524,    0.3778,    -0.508,    0.0127,    -1
-0.1524,    0.0,    -0.508,    -0.1524,    -0.3778,    -0.508,    0.0127,    -1
-0.129,    0.0,    0.254,    -0.129,    0.0,    0.5271,    0.0127,    -1
-0.0286,    0.0,    0.254,    -0.0286,    0.0,    0.4,    0.0127,    -1
-0.129,    0.0,    -0.5271,    -0.129,    0.0,    -0.254,    0.0127,    -1
-0.129,    0.0,    -0.254,    -0.129,    0.0,    0.254,    0.0127,    -1
-0.0286,    0.0,    -0.4,    -0.0286,    0.0,    -0.254,    0.0127,    -1
-0.0286,    0.0,    -0.254,    -0.0286,    0.0,    0.254,    0.0127,    -1
-0.0286,    0.0,    0.254,    -0.129,    0.0,    0.254,    0.0031,    -1
-0.0286,    0.0,    -0.254,    -0.129,    0.0,    -0.254,    0.0031,    -1
-0.1524,    0.0,    0.4064,    -0.1524,    0.3778,    0.4064,    0.0127,    -1
-0.1524,    0.0,    0.4064,    -0.1524,    -0.3778,    0.4064,    0.0127,    -1
-0.1524,    0.0,    -0.4064,    -0.1524,    0.3778,    -0.4064,    0.0127,    -1
-0.1524,    0.0,    -0.4064,    -0.1524,    -0.3778,    -0.4064,    0.0127,    -1
***Source***
1,    0
w29c,    0.0,    1.0
***Load***
0,    0
***Segmentation***
800,    80,    2.0,    2
***G/H/M/R/AzEl/X***
0,    15.0,    4,    300.0,    120,    60,    0.0
 
#27 ·
?

Quote:
Originally Posted by rabbit73
Do I have your permission to show your antenna design with your credit line in a post?
Yes all my publications are free to share

Quote:
Originally Posted by BOUVAL
And the elements length for the 470~608 MHz will be 11 inches and 10 inches bay spacing.
Is possible but in this graphic uses 0.43 lambda

post#17813
https://www.avsforum.com/forum/25-h...-related-hardware-topic-594.html#post58441182

Quote:
Originally Posted by Schoolbus

What can be done?
Use the alone tube like reflector and change design of the dipole would be similar to the Winegard HD-4400

example 8bay
Consider subtract lost of splinter conbiner, the weight and dimension
Look for another form to combine antenna without use of splinter

Azimuth Beam Width = 20 deg. a 470 MHz
Azimuth Beam Width = 16 deg. a 608 MHz

antenna-analyzing tool MMANA-GAL basic

.maa file below.
Code:
Code:
Fat_Dipole_8bay_antenna_uhf_v3
*
470.0
***Wires***
118
0.0,	0.3937,	0.381,	0.0,	0.6255,	0.381,	0.0127,	-1
0.0,	0.3619,	0.381,	0.0,	0.1301,	0.381,	0.0127,	-1
0.0,	0.3937,	0.127,	0.0,	0.6255,	0.127,	0.0127,	-1
0.0,	0.3619,	0.127,	0.0,	0.1301,	0.127,	0.0127,	-1
0.0,	0.3937,	-0.128,	0.0,	0.6255,	-0.127,	0.0127,	-1
0.0,	0.3619,	-0.127,	0.0,	0.1301,	-0.127,	0.0127,	-1
0.0,	0.3937,	-0.381,	0.0,	0.6255,	-0.381,	0.0127,	-1
0.0,	0.3619,	-0.381,	0.0,	0.1301,	-0.381,	0.0127,	-1
0.0,	0.3937,	0.0,	0.0,	0.3937,	0.127,	0.00162,	-1
0.0,	0.3937,	0.127,	0.0,	0.3937,	0.2858,	0.00162,	-1
0.0,	0.3937,	0.2858,	0.0064,	0.3778,	0.3016,	0.00162,	-1
0.0064,	0.3778,	0.3016,	0.0,	0.3619,	0.3175,	0.00162,	-1
0.0,	0.3619,	0.3175,	0.0,	0.3619,	0.381,	0.00162,	-1
0.0,	0.3937,	0.0,	0.0,	0.3937,	-0.128,	0.00162,	-1
0.0,	0.3937,	-0.128,	0.0,	0.3937,	-0.2858,	0.00162,	-1
0.0,	0.3937,	-0.2858,	0.0064,	0.3778,	-0.3016,	0.00162,	-1
0.0064,	0.3778,	-0.3016,	0.0,	0.3619,	-0.3175,	0.00162,	-1
0.0,	0.3619,	-0.3175,	0.0,	0.3619,	-0.381,	0.00162,	-1
0.0,	0.3619,	0.0,	0.0,	0.3619,	0.127,	0.00162,	-1
0.0,	0.3619,	0.127,	0.0,	0.3619,	0.2858,	0.00162,	-1
0.0,	0.3619,	0.2858,	-0.0064,	0.3778,	0.3016,	0.00162,	-1
-0.0064,	0.3778,	0.3016,	0.0,	0.3937,	0.3175,	0.00162,	-1
0.0,	0.3937,	0.3175,	0.0,	0.3937,	0.381,	0.00162,	-1
0.0,	0.3619,	0.0,	0.0,	0.3619,	-0.127,	0.00162,	-1
0.0,	0.3619,	-0.127,	0.0,	0.3619,	-0.2858,	0.00162,	-1
0.0,	0.3619,	-0.2858,	-0.0064,	0.3778,	-0.3016,	0.00162,	-1
-0.0064,	0.3778,	-0.3016,	0.0,	0.3937,	-0.3175,	0.00162,	-1
0.0,	0.3937,	-0.3175,	0.0,	0.3937,	-0.381,	0.00162,	-1
0.0,	0.3619,	0.0,	0.0,	0.3937,	0.0,	0.00162,	-1
-0.1524,	0.3778,	0.508,	-0.1524,	0.7556,	0.508,	0.0127,	-1
-0.1524,	0.3778,	0.508,	-0.1524,	0.0,	0.508,	0.0127,	-1
-0.1524,	0.3778,	0.3048,	-0.1524,	0.7556,	0.3048,	0.0127,	-1
-0.1524,	0.3778,	0.3048,	-0.1524,	0.0,	0.3048,	0.0127,	-1
-0.1524,	0.3778,	0.2032,	-0.1524,	0.7556,	0.2032,	0.0127,	-1
-0.1524,	0.3778,	0.2032,	-0.1524,	0.0,	0.2032,	0.0127,	-1
-0.1524,	0.3778,	0.1016,	-0.1524,	0.7556,	0.1016,	0.0127,	-1
-0.1524,	0.3778,	0.1016,	-0.1524,	0.0,	0.1016,	0.0127,	-1
-0.1524,	0.3778,	0.0,	-0.1524,	0.7556,	0.0,	0.0127,	-1
-0.1524,	0.3778,	0.0,	-0.1524,	0.0,	0.0,	0.0127,	-1
-0.1524,	0.3778,	-0.1016,	-0.1524,	0.7556,	-0.1016,	0.0127,	-1
-0.1524,	0.3778,	-0.1016,	-0.1524,	0.0,	-0.1016,	0.0127,	-1
-0.1524,	0.3778,	-0.2032,	-0.1524,	0.7556,	-0.2032,	0.0127,	-1
-0.1524,	0.3778,	-0.2032,	-0.1524,	0.0,	-0.2032,	0.0127,	-1
-0.1524,	0.3778,	-0.3048,	-0.1524,	0.7556,	-0.3048,	0.0127,	-1
-0.1524,	0.3778,	-0.3048,	-0.1524,	0.0,	-0.3048,	0.0127,	-1
-0.1524,	0.3778,	-0.508,	-0.1524,	0.7556,	-0.508,	0.0127,	-1
-0.1524,	0.3778,	-0.508,	-0.1524,	0.0,	-0.508,	0.0127,	-1
-0.129,	0.3778,	0.254,	-0.129,	0.3778,	0.5271,	0.0127,	-1
-0.0286,	0.3778,	0.254,	-0.0286,	0.3778,	0.4,	0.0127,	-1
-0.129,	0.3778,	-0.5271,	-0.129,	0.3778,	-0.254,	0.0127,	-1
-0.129,	0.3778,	-0.254,	-0.129,	0.3778,	0.254,	0.0127,	-1
-0.0286,	0.3778,	-0.4,	-0.0286,	0.3778,	-0.254,	0.0127,	-1
-0.0286,	0.3778,	-0.254,	-0.0286,	0.3778,	0.254,	0.0127,	-1
-0.0286,	0.3778,	0.254,	-0.129,	0.3778,	0.254,	0.0031,	-1
-0.0286,	0.3778,	-0.254,	-0.129,	0.3778,	-0.254,	0.0031,	-1
-0.1524,	0.3778,	0.4064,	-0.1524,	0.7556,	0.4064,	0.0127,	-1
-0.1524,	0.3778,	0.4064,	-0.1524,	0.0,	0.4064,	0.0127,	-1
-0.1524,	0.3778,	-0.4064,	-0.1524,	0.7556,	-0.4064,	0.0127,	-1
-0.1524,	0.3778,	-0.4064,	-0.1524,	0.0,	-0.4064,	0.0127,	-1
0.0,	-0.3619,	0.381,	0.0,	-0.1301,	0.381,	0.0127,	-1
0.0,	-0.3937,	0.381,	0.0,	-0.6255,	0.381,	0.0127,	-1
0.0,	-0.3619,	0.127,	0.0,	-0.1301,	0.127,	0.0127,	-1
0.0,	-0.3937,	0.127,	0.0,	-0.6255,	0.127,	0.0127,	-1
0.0,	-0.3619,	-0.128,	0.0,	-0.1301,	-0.127,	0.0127,	-1
0.0,	-0.3937,	-0.127,	0.0,	-0.6255,	-0.127,	0.0127,	-1
0.0,	-0.3619,	-0.381,	0.0,	-0.1301,	-0.381,	0.0127,	-1
0.0,	-0.3937,	-0.381,	0.0,	-0.6255,	-0.381,	0.0127,	-1
0.0,	-0.3619,	0.0,	0.0,	-0.3619,	0.127,	0.00162,	-1
0.0,	-0.3619,	0.127,	0.0,	-0.3619,	0.2858,	0.00162,	-1
0.0,	-0.3619,	0.2858,	0.0064,	-0.3778,	0.3016,	0.00162,	-1
0.0064,	-0.3778,	0.3016,	0.0,	-0.3937,	0.3175,	0.00162,	-1
0.0,	-0.3937,	0.3175,	0.0,	-0.3937,	0.381,	0.00162,	-1
0.0,	-0.3619,	0.0,	0.0,	-0.3619,	-0.128,	0.00162,	-1
0.0,	-0.3619,	-0.128,	0.0,	-0.3619,	-0.2858,	0.00162,	-1
0.0,	-0.3619,	-0.2858,	0.0064,	-0.3778,	-0.3016,	0.00162,	-1
0.0064,	-0.3778,	-0.3016,	0.0,	-0.3937,	-0.3175,	0.00162,	-1
0.0,	-0.3937,	-0.3175,	0.0,	-0.3937,	-0.381,	0.00162,	-1
0.0,	-0.3937,	0.0,	0.0,	-0.3937,	0.127,	0.00162,	-1
0.0,	-0.3937,	0.127,	0.0,	-0.3937,	0.2858,	0.00162,	-1
0.0,	-0.3937,	0.2858,	-0.0064,	-0.3778,	0.3016,	0.00162,	-1
-0.0064,	-0.3778,	0.3016,	0.0,	-0.3619,	0.3175,	0.00162,	-1
0.0,	-0.3619,	0.3175,	0.0,	-0.3619,	0.381,	0.00162,	-1
0.0,	-0.3937,	0.0,	0.0,	-0.3937,	-0.127,	0.00162,	-1
0.0,	-0.3937,	-0.127,	0.0,	-0.3937,	-0.2858,	0.00162,	-1
0.0,	-0.3937,	-0.2858,	-0.0064,	-0.3778,	-0.3016,	0.00162,	-1
-0.0064,	-0.3778,	-0.3016,	0.0,	-0.3619,	-0.3175,	0.00162,	-1
0.0,	-0.3619,	-0.3175,	0.0,	-0.3619,	-0.381,	0.00162,	-1
0.0,	-0.3937,	0.0,	0.0,	-0.3619,	0.0,	0.00162,	-1
-0.1524,	-0.3778,	0.508,	-0.1524,	0.0,	0.508,	0.0127,	-1
-0.1524,	-0.3778,	0.508,	-0.1524,	-0.7556,	0.508,	0.0127,	-1
-0.1524,	-0.3778,	0.3048,	-0.1524,	0.0,	0.3048,	0.0127,	-1
-0.1524,	-0.3778,	0.3048,	-0.1524,	-0.7556,	0.3048,	0.0127,	-1
-0.1524,	-0.3778,	0.2032,	-0.1524,	0.0,	0.2032,	0.0127,	-1
-0.1524,	-0.3778,	0.2032,	-0.1524,	-0.7556,	0.2032,	0.0127,	-1
-0.1524,	-0.3778,	0.1016,	-0.1524,	0.0,	0.1016,	0.0127,	-1
-0.1524,	-0.3778,	0.1016,	-0.1524,	-0.7556,	0.1016,	0.0127,	-1
-0.1524,	-0.3778,	0.0,	-0.1524,	0.0,	0.0,	0.0127,	-1
-0.1524,	-0.3778,	0.0,	-0.1524,	-0.7556,	0.0,	0.0127,	-1
-0.1524,	-0.3778,	-0.1016,	-0.1524,	0.0,	-0.1016,	0.0127,	-1
-0.1524,	-0.3778,	-0.1016,	-0.1524,	-0.7556,	-0.1016,	0.0127,	-1
-0.1524,	-0.3778,	-0.2032,	-0.1524,	0.0,	-0.2032,	0.0127,	-1
-0.1524,	-0.3778,	-0.2032,	-0.1524,	-0.7556,	-0.2032,	0.0127,	-1
-0.1524,	-0.3778,	-0.3048,	-0.1524,	0.0,	-0.3048,	0.0127,	-1
-0.1524,	-0.3778,	-0.3048,	-0.1524,	-0.7556,	-0.3048,	0.0127,	-1
-0.1524,	-0.3778,	-0.508,	-0.1524,	0.0,	-0.508,	0.0127,	-1
-0.1524,	-0.3778,	-0.508,	-0.1524,	-0.7556,	-0.508,	0.0127,	-1
-0.129,	-0.3778,	0.254,	-0.129,	-0.3778,	0.5271,	0.0127,	-1
-0.0286,	-0.3778,	0.254,	-0.0286,	-0.3778,	0.4,	0.0127,	-1
-0.129,	-0.3778,	-0.5271,	-0.129,	-0.3778,	-0.254,	0.0127,	-1
-0.129,	-0.3778,	-0.254,	-0.129,	-0.3778,	0.254,	0.0127,	-1
-0.0286,	-0.3778,	-0.4,	-0.0286,	-0.3778,	-0.254,	0.0127,	-1
-0.0286,	-0.3778,	-0.254,	-0.0286,	-0.3778,	0.254,	0.0127,	-1
-0.0286,	-0.3778,	0.254,	-0.129,	-0.3778,	0.254,	0.0031,	-1
-0.0286,	-0.3778,	-0.254,	-0.129,	-0.3778,	-0.254,	0.0031,	-1
-0.1524,	-0.3778,	0.4064,	-0.1524,	0.0,	0.4064,	0.0127,	-1
-0.1524,	-0.3778,	0.4064,	-0.1524,	-0.7556,	0.4064,	0.0127,	-1
-0.1524,	-0.3778,	-0.4064,	-0.1524,	0.0,	-0.4064,	0.0127,	-1
-0.1524,	-0.3778,	-0.4064,	-0.1524,	-0.7556,	-0.4064,	0.0127,	-1
***Source***
2,	0
w29c,	0.0,	1.0
w88c,	0.0,	1.0
***Load***
0,	0
***Segmentation***
800,	80,	2.0,	2
***G/H/M/R/AzEl/X***
0,	15.0,	4,	300.0,	120,	60,	0.0
 
#30 · (Edited)
I hope I haven't changed this too much. Hoping it would be easier to build and lighter.
Rescaled then re-optimized holl_ands' 8 bay fat dipoles. Reduced refl pairs to 26 total, and reduced the elements to 1/4" copper tubing.
nikiml's nec_opt optimizer is still running with 8 variables, but here is where it's at currently...
peak net gain is ~ 18.2 dBi at ch 32
467.0-611.0 net gain - ave 17.29dBi
As with any vertically stacked antenna, the vertical beam is quite narrow.
12 degrees vbw at ch 32 for example, so you'd wanna make sure your vertical
beam is aimed at the horizon towards distant xmtrs. eg if your in relatively flat terrain nearby, make sure your mast is plumb.

Code:
         --- Gain ---              -- Ratios -- -- Impedance --   
   Freq    Raw    Net   SWR BeamW    F/R    F/B    Real    Imag  AGT  corr
==========================================================================
  467.0  16.12  16.00  1.40  44.7  17.33  19.94  411.55   43.74 1.00 -0.00
  473.0  16.39  16.31  1.32  44.0  17.43  20.66  393.07  -27.10 1.00 -0.00
  479.0  16.61  16.53  1.32  43.4  17.52  21.37  351.55  -74.59 1.00 -0.00
  485.0  16.78  16.67  1.37  42.9  17.59  22.07  305.28  -95.35 1.00 -0.00
  491.0  16.94  16.80  1.44  42.3  17.66  22.76  265.89  -97.46 1.00 -0.00
  497.0  17.07  16.88  1.52  41.8  17.72  23.39  234.30  -90.13 1.00 -0.00
  503.0  17.18  16.94  1.61  41.3  17.78  24.00  209.35  -78.54 1.00 -0.00
  509.0  17.30  17.01  1.69  40.8  17.78  24.52  191.08  -64.21 1.00 -0.00
  515.0  17.41  17.08  1.75  40.3  17.77  24.92  178.46  -47.61 1.00 -0.00
  521.0  17.52  17.15  1.80  39.9  17.76  25.22  169.48  -31.04 1.00 -0.00
  527.0  17.63  17.24  1.84  39.3  17.77  25.41  163.78  -14.27 1.00 -0.00
  533.0  17.74  17.33  1.85  38.6  17.77  25.44  161.88    3.78 1.00 -0.00
  539.0  17.86  17.45  1.87  38.0  17.78  25.38  161.85   22.00 1.00 -0.01
  545.0  17.98  17.57  1.86  37.4  17.81  25.21  165.58   40.62 1.00 -0.01
  551.0  18.10  17.71  1.83  36.9  17.83  24.98  174.24   61.16 1.00 -0.01
  557.0  18.20  17.84  1.80  36.4  17.77  24.68  185.67   80.92 1.00 -0.01
  563.0  18.31  17.98  1.75  35.8  17.72  24.36  204.78  103.43 1.00 -0.01
  569.0  18.40  18.09  1.71  35.3  17.68  24.03  231.20  125.31 1.00 -0.01
  575.0  18.46  18.19  1.66  34.8  17.62  23.69  276.88  146.12 1.00 -0.01
  581.0  18.50  18.23  1.66  34.3  17.60  23.35  334.17  158.07 1.00 -0.01
  587.0  18.47  18.18  1.69  33.8  17.55  23.01  427.82  139.33 1.00 -0.01
  593.0  18.37  18.02  1.78  33.2  17.51  22.66  523.52   61.04 1.00 -0.01
  599.0  18.14  17.67  1.95  32.7  17.38  22.29  561.55  -97.39 1.00 -0.01
  605.0  17.79  17.15  2.18  32.2  17.09  21.88  482.85 -243.48 1.00 -0.01
  611.0  17.11  16.23  2.51  31.6  16.53  21.31  328.25 -297.46 1.00 -0.01
Code:
CM UHF 8-Bay Vertical Fat Dipoles, NO Sweep, 26-Pairs-RR, 4nec2 by holl_ands, 29Aug2014
CM 1/4-in O.D. Elements, 26 Reflector Rods, Hop=1.0-in.  PYTHONSEG(7), 7 Python Variables.
CM DipoleLength=Vrbl, DipoleSpacing=Vrbl, FeedSep=Vrbl (AWG8).  Ignore Fat Wire Warnings.
CM reduce reflector pairs from 43 to 26 pairs - majortom
CM changed elements to 1/4" copper tubing -majortom
CM freq scaled and re-optimized, with nikiml's nec_opt, for 470-611 MHz by majortom 16 Aug 2020
CM
CM 911 Segs so can use default nec2dxs1k6 NEC-Engine, NO Errors or Warnings, UHF AGT=1.0.
CMD--OPT -s(470,14,10) -t(16,18) --swr-target=1.5 --f2r-target=20 --f2b-target=20 --de-np=80 -r restart.log
CMD--OPT --seed-with-input --target-function=(4*max_ml+16*max_gain_diff+4*max_f2r_diff+max_f2b_diff)/25
CMD--OPT --auto-segmentation=7 --char-impedance=300 --validate-geometry=0 --num-cores=8
CM D--EVAL --auto-segmentation=0 --char-impedance=300 --num-cores=2
CM D--EVAL -s(470,6,24) --total-gain --centers --publish
CE
' Simulated SOURCE Wire Radius, Adjust for AGT=1.0: UHF=0.529
SY Freqscale=1
SY Rsrc=0.112 * (Freqscale) / (Freqscale)
SY Rdip=0.125
SY Rfeed=0.06425
' Dipole-To-Dipole Separation:
SY DDSep=10.4541534' 7, 15
' Dipole Half-Length (cut down from BOUVAL's 9.75-in, may round to 1/8-inch):
SY DLen=10.3646524' 5, 12
SY DSwp=0
' Separation between two FEEDLINE wires:
SY FeedSep=1.0141217' 1, 6
' From center of Feedline Cross-Over to center of OUTER Dipoles:
SY ZCross=1.9326030' 1.375, 8.25
SY Hop=1
SY Cond=2e+07
'
' Reflector Rod Separation behind Dipoles (may round to 1/8-in):
SY RS=5.0711547' 3, 25
' Reflector Rod-to-Rod Separation (may round to 1/8-in):
SY RR=2.9984182' 1.5, 3
' Reflector Rod Half-Lengths (may round to 1/8-in):
SY YRod=15.4357051' 10, 30
SY Rrod=0.1875
' Gap Between each Reflector Rod Pair:
SY Rgap=0.2522895' 0.25, 25
'
' Calculated from above INPUT Values:
SY ZDInr=DDSep/2' Distance from antenna center to center of INNER Dipole
SY ZDMid=DDSep/2+DDSep' Distance from antenna center to center of LOWER-MIDDLE Dipole
SY Z1=ZDMid
SY Z2=ZDMid
SY Z3=ZDMid
SY Z4=ZDMid-ZCross+0.875
SY Z5=ZDMid-ZCross
SY Z6=ZDMid-ZCross-0.875
SY Z7=ZDInr
SY Z8=ZDInr
SY Z9=ZDInr
SY Z11=DDSep+ZDMid
SY Z12=DDSep+ZDMid
SY Z13=DDSep+ZDMid
SY Z14=DDSep+ZDMid-ZCross+0.875
SY Z15=DDSep+ZDMid-ZCross
SY Z16=DDSep+ZDMid-ZCross-0.875
SY Z17=DDSep+ZDInr
SY Z18=DDSep+ZDInr
SY Z19=DDSep+ZDInr
SY Z21=2*DDSep+ZDMid
SY Z22=2*DDSep+ZDMid
SY Z23=2*DDSep+ZDMid
SY Z24=2*DDSep+ZDMid-ZCross+0.875
SY Z25=2*DDSep+ZDMid-ZCross
SY Z26=2*DDSep+ZDMid-ZCross-0.875
SY Z27=2*DDSep+ZDInr
SY Z28=2*DDSep+ZDInr
SY Z29=2*DDSep+ZDInr
SY YDInr=FeedSep/2+(DLen^2-DSwp^2)^0.5' Ymax for Inner Dipoles
SY YDOut=FeedSep/2+(DLen^2-DSwp^2)^0.5' Ymax for Outer Dipoles
'
'  #    segs    X1      Y1        Z1     X2        Y2         Z2    radius
' SIMULATED SOURCE WIRE:
GW  1     3    +RS    -FeedSep/2    0.0     +RS        FeedSep/2     0.0    Rsrc' #ff0
' INNER DIPOLES:
GW  2     9   DSwp+RS     YDInr         Z7     +RS        FeedSep/2     Z8    Rdip' #00f
GW  3     9    +RS    -FeedSep/2     Z8   DSwp+RS    -YDInr     Z7    Rdip
GW  4     9   DSwp+RS     YDInr        -Z7    +RS        FeedSep/2    -Z8    Rdip
GW  5     9    +RS    -FeedSep/2    -Z8   DSwp+RS    -YDInr    -Z7    Rdip
' LOWER-MIDDLE DIPOLES:
GW  6     9   DSwp+RS     YDOut         Z1      +RS        FeedSep/2     Z2    Rdip
GW  7     9    +RS    -FeedSep/2     Z2   DSwp+RS    -YDOut     Z1    Rdip
GW  8     9   DSwp+RS     YDOut        -Z1      +RS        FeedSep/2    -Z2    Rdip
GW  9     9    +RS    -FeedSep/2    -Z2   DSwp+RS    -YDOut    -Z1    Rdip
' OUTER-MIDDLE DIPOLES:
GW 10     9   DSwp+RS     YDOut         Z11     +RS        FeedSep/2     Z12    Rdip
GW 11     9    +RS    -FeedSep/2     Z12  DSwp+RS   -YDOut     Z11    Rdip
GW 12     9   DSwp+RS     YDOut        -Z11      +RS        FeedSep/2    -Z12    Rdip
GW 13     9    +RS    -FeedSep/2    -Z12  DSwp+RS   -YDOut    -Z11    Rdip
' OUTER DIPOLES:
GW 14     9   DSwp+RS     YDOut         Z21     +RS        FeedSep/2     Z22    Rdip
GW 15     9    +RS    -FeedSep/2     Z22  DSwp+RS   -YDOut     Z21    Rdip
GW 16     9   DSwp+RS     YDOut        -Z21      +RS        FeedSep/2    -Z22    Rdip
GW 17     9    +RS    -FeedSep/2    -Z22  DSwp+RS   -YDOut    -Z21    Rdip
' CENTER FEEDLINE:
GW 18     5    +RS     FeedSep/2     Z8     +RS        FeedSep/2     0.0    Rfeed' #0f0
GW 19     5    +RS    -FeedSep/2     Z8     +RS       -FeedSep/2     0.0    Rfeed
GW 20     5    +RS     FeedSep/2    -Z8     +RS        FeedSep/2     0.0    Rfeed
GW 21     5     +RS    -FeedSep/2    -Z8     +RS       -FeedSep/2     0.0    Rfeed
' INNER CROSS-OVER FEEDLINE:
GW 22     1    +RS     FeedSep/2     Z2     +RS        FeedSep/2     Z4    Rfeed
GW 23     1    +RS    -FeedSep/2     Z2     +RS       -FeedSep/2     Z4    Rfeed
GW 24     9    +RS     FeedSep/2     Z6     +RS        FeedSep/2     Z8    Rfeed
GW 25     9    +RS    -FeedSep/2     Z6     +RS       -FeedSep/2     Z8    Rfeed
GW 26     3    +RS    -FeedSep/2     Z6   Hop/2+RS   0.0     Z5    Rfeed
GW 27     3    +RS     FeedSep/2     Z4   Hop/2+RS   0.0     Z5    Rfeed
GW 28     3    +RS     FeedSep/2     Z6  -Hop/2+RS   0.0     Z5    Rfeed
GW 29     3    +RS    -FeedSep/2     Z4  -Hop/2+RS   0.0     Z5    Rfeed
GW 30     1    +RS     FeedSep/2    -Z2     +RS        FeedSep/2    -Z4    Rfeed
GW 31     1    +RS    -FeedSep/2    -Z2     +RS       -FeedSep/2    -Z4    Rfeed
GW 32     9    +RS     FeedSep/2    -Z6     +RS        FeedSep/2    -Z8    Rfeed
GW 33     9    +RS    -FeedSep/2    -Z6     +RS       -FeedSep/2    -Z8    Rfeed
GW 34     3    +RS    -FeedSep/2    -Z6  -Hop/2+RS   0.0    -Z5    Rfeed
GW 35     3    +RS     FeedSep/2    -Z4  -Hop/2+RS   0.0    -Z5    Rfeed
GW 36     3    +RS     FeedSep/2    -Z6  +Hop/2+RS   0.0    -Z5    Rfeed
GW 37     3    +RS    -FeedSep/2    -Z4  +Hop/2+RS   0.0    -Z5    Rfeed
' LOWER-MIDDLE CROSS-OVER FEEDLINE:
GW 38     1    +RS     FeedSep/2     Z12     +RS        FeedSep/2     Z14    Rfeed
GW 39     1    +RS    -FeedSep/2     Z12     +RS       -FeedSep/2     Z14    Rfeed
GW 40     3    +RS    -FeedSep/2     Z16   Hop/2+RS  0.0     Z15    Rfeed
GW 41     3    +RS     FeedSep/2     Z14   Hop/2+RS  0.0     Z15    Rfeed
GW 42     3    +RS     FeedSep/2     Z16  -Hop/2+RS  0.0     Z15    Rfeed
GW 43     3    +RS    -FeedSep/2     Z14  -Hop/2+RS  0.0     Z15    Rfeed
GW 44     9    +RS     FeedSep/2     Z16     +RS        FeedSep/2     Z18    Rfeed
GW 45     9    +RS    -FeedSep/2     Z16     +RS       -FeedSep/2     Z18    Rfeed
GW 46     1    +RS     FeedSep/2    -Z12     +RS        FeedSep/2    -Z14    Rfeed
GW 47     1    +RS    -FeedSep/2    -Z12     +RS       -FeedSep/2    -Z14    Rfeed
GW 48     3    +RS    -FeedSep/2    -Z16  -Hop/2+RS  0.0    -Z15    Rfeed
GW 49     3    +RS     FeedSep/2    -Z14  -Hop/2+RS  0.0    -Z15    Rfeed
GW 50     3    +RS     FeedSep/2    -Z16  +Hop/2+RS  0.0    -Z15    Rfeed
GW 51     3    +RS    -FeedSep/2    -Z14  +Hop/2+RS  0.0    -Z15    Rfeed
GW 52     9    +RS     FeedSep/2    -Z16     +RS        FeedSep/2    -Z18    Rfeed
GW 53     9    +RS    -FeedSep/2    -Z16     +RS       -FeedSep/2    -Z18    Rfeed
' OUTER CROSS-OVER FEEDLINE:
GW 54     1    +RS     FeedSep/2     Z22     +RS        FeedSep/2     Z24    Rfeed
GW 55     1    +RS    -FeedSep/2     Z22     +RS       -FeedSep/2     Z24    Rfeed
GW 56     3    +RS    -FeedSep/2     Z26   Hop/2+RS  0.0     Z25    Rfeed
GW 57     3    +RS     FeedSep/2     Z24   Hop/2+RS  0.0     Z25    Rfeed
GW 58     3    +RS     FeedSep/2     Z26  -Hop/2+RS  0.0     Z25    Rfeed
GW 59     3    +RS    -FeedSep/2     Z24  -Hop/2+RS  0.0     Z25    Rfeed
GW 60     9    +RS     FeedSep/2     Z26     +RS        FeedSep/2     Z28    Rfeed
GW 61     9    +RS    -FeedSep/2     Z26     +RS       -FeedSep/2     Z28    Rfeed
GW 62     1    +RS     FeedSep/2    -Z22     +RS        FeedSep/2    -Z24    Rfeed
GW 63     1    +RS    -FeedSep/2    -Z22     +RS       -FeedSep/2    -Z24    Rfeed
GW 64     3    +RS    -FeedSep/2    -Z26  -Hop/2+RS  0.0    -Z25    Rfeed
GW 65     3    +RS     FeedSep/2    -Z24  -Hop/2+RS  0.0    -Z25    Rfeed
GW 66     3    +RS     FeedSep/2    -Z26  +Hop/2+RS  0.0    -Z25    Rfeed
GW 67     3    +RS    -FeedSep/2    -Z24  +Hop/2+RS  0.0    -Z25    Rfeed
GW 68     9    +RS     FeedSep/2    -Z26     +RS        FeedSep/2    -Z28    Rfeed
GW 69     9    +RS    -FeedSep/2    -Z26     +RS       -FeedSep/2    -Z28    Rfeed
'
' UP TO 43 PAIRS OF REFLECTOR RODS:
GW 78 9 0.0 -YRod 13*RR  0.0 -Rgap/2 13*RR  Rrod' #000
GW 79 9 0.0 -YRod 12*RR  0.0 -Rgap/2 12*RR  Rrod' #000
GW 80 9 0.0 -YRod 11*RR  0.0 -Rgap/2 11*RR  Rrod'
GW 81 9 0.0 -YRod 10*RR  0.0 -Rgap/2 10*RR  Rrod
GW 82 9 0.0 -YRod  9*RR  0.0 -Rgap/2  9*RR  Rrod
GW 83 9 0.0 -YRod  8*RR  0.0 -Rgap/2  8*RR  Rrod
GW 84 9 0.0 -YRod  7*RR  0.0 -Rgap/2  7*RR  Rrod
GW 85 9 0.0 -YRod  6*RR  0.0 -Rgap/2  6*RR  Rrod
GW 86 9 0.0 -YRod  5*RR  0.0 -Rgap/2  5*RR  Rrod
GW 87 9 0.0 -YRod  4*RR  0.0 -Rgap/2  4*RR  Rrod
GW 88 9 0.0 -YRod  3*RR  0.0 -Rgap/2  3*RR  Rrod
GW 89 9 0.0 -YRod  2*RR  0.0 -Rgap/2  2*RR  Rrod
GW 90 9 0.0 -YRod  1*RR  0.0 -Rgap/2  1*RR  Rrod
'
GW 98  9 0.0 YRod 13*RR  0.0 Rgap/2 13*RR  Rrod
GW 99  9 0.0 YRod 12*RR  0.0 Rgap/2 12*RR  Rrod
GW 100 9 0.0 YRod 11*RR  0.0 Rgap/2 11*RR  Rrod
GW 101 9 0.0 YRod 10*RR  0.0 Rgap/2 10*RR  Rrod
GW 102 9 0.0 YRod  9*RR  0.0 Rgap/2  9*RR  Rrod
GW 103 9 0.0 YRod  8*RR  0.0 Rgap/2  8*RR  Rrod
GW 104 9 0.0 YRod  7*RR  0.0 Rgap/2  7*RR  Rrod
GW 105 9 0.0 YRod  6*RR  0.0 Rgap/2  6*RR  Rrod
GW 106 9 0.0 YRod  5*RR  0.0 Rgap/2  5*RR  Rrod
GW 107 9 0.0 YRod  4*RR  0.0 Rgap/2  4*RR  Rrod
GW 108 9 0.0 YRod  3*RR  0.0 Rgap/2  3*RR  Rrod
GW 109 9 0.0 YRod  2*RR  0.0 Rgap/2  2*RR  Rrod
GW 110 9 0.0 YRod  1*RR  0.0 Rgap/2  1*RR  Rrod
'
GW 111 9 0.0 -YRod  -1*RR 0.0 -Rgap/2   -1*RR Rrod
GW 112 9 0.0 -YRod  -2*RR 0.0 -Rgap/2   -2*RR Rrod
GW 113 9 0.0 -YRod  -3*RR 0.0 -Rgap/2   -3*RR Rrod
GW 114 9 0.0 -YRod  -4*RR 0.0 -Rgap/2   -4*RR Rrod
GW 115 9 0.0 -YRod  -5*RR 0.0 -Rgap/2   -5*RR Rrod
GW 116 9 0.0 -YRod  -6*RR 0.0 -Rgap/2   -6*RR Rrod
GW 117 9 0.0 -YRod  -7*RR 0.0 -Rgap/2   -7*RR Rrod
GW 118 9 0.0 -YRod  -8*RR 0.0 -Rgap/2   -8*RR Rrod
GW 119 9 0.0 -YRod  -9*RR 0.0 -Rgap/2   -9*RR Rrod
GW 120 9 0.0 -YRod -10*RR 0.0 -Rgap/2  -10*RR Rrod
GW 121 9 0.0 -YRod -11*RR 0.0 -Rgap/2  -11*RR Rrod
GW 122 9 0.0 -YRod -12*RR 0.0 -Rgap/2  -12*RR Rrod
GW 123 9 0.0 -YRod -13*RR 0.0 -Rgap/2  -13*RR Rrod
'
GW 131 9 0.0 YRod  -1*RR 0.0 Rgap/2  -1*RR Rrod
GW 132 9 0.0 YRod  -2*RR 0.0 Rgap/2  -2*RR Rrod
GW 133 9 0.0 YRod  -3*RR 0.0 Rgap/2  -3*RR Rrod
GW 134 9 0.0 YRod  -4*RR 0.0 Rgap/2  -4*RR Rrod
GW 135 9 0.0 YRod  -5*RR 0.0 Rgap/2  -5*RR Rrod
GW 136 9 0.0 YRod  -6*RR 0.0 Rgap/2  -6*RR Rrod
GW 137 9 0.0 YRod  -7*RR 0.0 Rgap/2  -7*RR Rrod
GW 138 9 0.0 YRod  -8*RR 0.0 Rgap/2  -8*RR Rrod
GW 139 9 0.0 YRod  -9*RR 0.0 Rgap/2  -9*RR Rrod
GW 140 9 0.0 YRod -10*RR 0.0 Rgap/2 -10*RR Rrod
GW 141 9 0.0 YRod -11*RR 0.0 Rgap/2 -11*RR Rrod
GW 142 9 0.0 YRod -12*RR 0.0 Rgap/2 -12*RR Rrod
GW 143 9 0.0 YRod -13*RR 0.0 Rgap/2 -13*RR Rrod
'
'GW 151 9 0.0 -YRod    0.0   0.0 -Rgap/2  0.0   Rrod    ' CENTER RR
'GW 152 9 0.0  Rgap/2  0.0   0.0  YRod    0.0   Rrod    ' CENTER RR
'
GS 0 0 0.0254*Freqscale            ' CONVERT ABOVE FROM INCHES TO METERS FOR NEC.
GE 0                ' No Ground Plane
GN -1                ' Free Space
EK 0                ' Enable Extended Kernel
LD 5 0 0 0 Cond 0        ' Conductivity
EX 0 1 1 0 1 0        ' SOURCE on GW1, seg 1
'
' FR Freq Sweep choices in order of increasing calculation time (fm holl_ands):
' FR 0 29 0 0 470 12      ' Freq Sweep 470-806 every 12 MHz - OLD UHF BAND
FR 0 39 0 0 470 6        ' Freq Sweep 470-698 every 6 MHz - PREFERRED FOR UHF
' FR 0 77 0 0 470 3        ' Freq Sweep 470-698 every 3 MHz
' FR 0 153 0 0 470 1.5    ' Freq Sweep 470-698 every 1.5 MHz
' FR 0 71 0 0 300 10    ' Freq Sweep 300-1000 every 10 MHz - WIDEBAND SWEEP
' FR Hi-VHF choices:
' FR 0 15 0 0 174 3        ' Freq Sweep 174-216 every 3 MHz
' FR 0 29 0 0 174 1.5    ' Freq Sweep 174-216 every 1.5 MHz - PREFERRED
' FR 0 43 0 0 174 1        ' Freq Sweep 174-216 every 1 MHz - Hi-Rez
' FR 0 26 0 0 150 6        ' Freq Sweep 150-300 every 6 MHz - WIDEBAND SWEEP
' FR Lo-VHF choices:
' FR 0 19 0 0 54 3        ' Frequency Sweep every 3 MHz for Ch2-6 + FM
' FR 0 35 0 0 54 1        ' Frequency Sweep every 1 MHz for Ch2-6
' FR 0 36 0 0 75 1        ' Frequency Sweep every 1 MHz for Ch5 + Ch6 + FM
' RP choices in order of increasing calculation time:
' RP 0 1 1 1510 90 0 1 1 0 0    ' 1D Gain toward 90-deg Azimuth
' RP 0 1 37 1510 90 0 1 5 0 0     ' 2D (Left only) Azimuthal Gain Slice
RP 0 1 73 1510 90 0 1 5 0 0      ' 2D Azimuthal Gain Slice - PREFERRED
' RP 0 73 1 1510 90 0 5 1 0 0     ' 2D Elevation Gain Slice
' RP 0 73 73 1510 90 0 5 5 0 0     ' 3D Lower Hemisphere reveals antenna
' RP 0 285 73 1510 90 0 5 5 0 0    ' 3D Full Coverage obscures antenna
EN
 
#34 · (Edited)
I hope I haven't changed this too much. Hoping it would be easier to build and lighter.
Rescaled then re-optimized holl_ands' 8 bay fat dipoles. Reduced refl pairs to 26 total, and reduced the elements to 1/4" copper tubing.
nikiml's nec_opt optimizer is still running with 8 variables, but here is where it's at currently...
peak net gain is ~ 18.2 dBi at ch 32
467.0-611.0 net gain - ave 17.29dBi
Bill - I've run this model in 4nec2 and it's fantastic; I think I would like to build this antenna to replace my PR8800 attic antenna. Are you still running the optimizer?

I've read the entire Bouval thread on fat dipole construction, and like his idea of using PVC Tees. If you were to build this antenna with 1/4" copper tubing, any thoughts as to how you would support the structure?

And you can go down to 17 reflector pairs (similar to the vertical reflectors spacing used in the PR4400) with very little loss in gain, to further reduce complexity and wind loading. I think if you lengthen the reflectors a smidge, you may improve gain on the lower UHF channels

17 reflector pairs on nikimi's viewer

CM UHF 8-Bay Vertical Fat Dipoles, NO Sweep, 17 reflector pairs by holl_ands, optimized by MajorTom for ch14-38
CM 1/4-in O.D. Elements, 26 Reflector Rods, Hop=1.0-in. PYTHONSEG(7), 7 Python Variables.
CM DipoleLength=Vrbl, DipoleSpacing=Vrbl, FeedSep=Vrbl (AWG8). Ignore Fat Wire Warnings.
CM reduce reflector pairs from 26 to 17 pairs (va3rr)
CM changed elements to 1/4" copper tubing -majortom
CM freq scaled and re-optimized, with nikiml
CM 911 Segs so can use default nec2dxs1k6 NEC-Engine, NO Errors or Warnings, UHF AGT=1.0.
CM D--OPT -s(470,14,10) -t(16,18) --swr-target=1.5 --f2r-target=20 --f2b-target=20 --de-np=80 -r restart.log
CM D--OPT --seed-with-input --target-function=(4*max_ml+16*max_gain_diff+4*max_f2r_diff+max_f2b_diff)/25
CM D--OPT --auto-segmentation=7 --char-impedance=300 --validate-geometry=0 --num-cores=8
CM D--EVAL --auto-segmentation=0 --char-impedance=300 --num-cores=2
CM D--EVAL -s(470,6,24) --total-gain --centers --publish
CE
GW 1 3 0.12880733 -0.0128793 0 0.12880733 0.01287935 0 2.8448e-3
GW 2 9 0.1288073 0.2761415 0.1327677 0.1288073 0.0128793 0.1327677 3.175e-3
GW 3 9 0.1288073 -0.012879 0.1327677 0.1288073 -0.276141 0.1327677 3.175e-3
GW 4 18 0.1288073 0.2761415 -0.1328 0.1288073 0.0128793 -0.132768 3.175e-3
GW 5 9 0.1288073 -0.012879 -0.132768 0.1288073 -0.276141 -0.132768 3.175e-3
GW 6 9 0.1288073 0.2761415 0.3983032 0.1288073 0.0128793 0.3983032 3.175e-3
GW 7 9 0.1288073 -0.012879 0.3983032 0.1288073 -0.276141 0.3983032 3.175e-3
GW 8 9 0.1288073 0.2761415 -0.398303 0.1288073 0.0128793 -0.398303 3.175e-3
GW 9 9 0.1288073 -0.012879 -0.398303 0.1288073 -0.276141 -0.398303 3.175e-3
GW 10 9 0.1288073 0.2761415 0.6638388 0.1288073 0.0128793 0.6638388 3.175e-3
GW 11 9 0.1288073 -0.012879 0.6638388 0.1288073 -0.276141 0.6638388 3.175e-3
GW 12 9 0.1288073 0.2761415 -0.663839 0.1288073 0.0128793 -0.663839 3.175e-3
GW 13 9 0.1288073 -0.012879 -0.663839 0.1288073 -0.276141 -0.663839 3.175e-3
GW 14 9 0.1288073 0.2761415 0.9293742 0.1288073 0.0128793 0.9293742 3.175e-3
GW 15 9 0.1288073 -0.012879 0.9293742 0.1288073 -0.276141 0.9293742 3.175e-3
GW 16 9 0.1288073 0.2761415 -0.929374 0.1288073 0.0128793 -0.929374 3.175e-3
GW 17 9 0.1288073 -0.012879 -0.929374 0.1288073 -0.276141 -0.929374 3.175e-3
GW 18 5 0.12880733 0.01287935 0.13276775 0.12880733 0.01287935 0 1.63195e-3
GW 19 5 0.12880733 -0.0128793 0.13276775 0.12880733 -0.0128793 0 1.63195e-3
GW 20 5 0.12880733 0.01287935 -0.1327678 0.12880733 0.01287935 0 1.63195e-3
GW 21 5 0.12880733 -0.0128793 -0.1327678 0.12880733 -0.0128793 0 1.63195e-3
GW 22 1 0.1288073 0.0128793 0.3983032 0.1288073 0.0128793 0.3714401 1.632e-3
GW 23 1 0.1288073 -0.012879 0.3983032 0.1288073 -0.012879 0.3714401 1.632e-3
GW 24 9 0.1288073 0.0128793 0.3269901 0.1288073 0.0128793 0.1327677 1.632e-3
GW 25 9 0.1288073 -0.012879 0.3269901 0.1288073 -0.012879 0.1327677 1.632e-3
GW 26 3 0.12880733 -0.0128793 0.32699013 0.14150733 0 0.34921513 1.63195e-3
GW 27 3 0.12880733 0.01287935 0.37144013 0.14150733 0 0.34921513 1.63195e-3
GW 28 3 0.12880733 0.01287935 0.32699013 0.11610733 0 0.34921513 1.63195e-3
GW 29 3 0.12880733 -0.0128793 0.37144013 0.11610733 0 0.34921513 1.63195e-3
GW 30 1 0.1288073 0.0128793 -0.398303 0.1288073 0.0128793 -0.37144 1.632e-3
GW 31 1 0.1288073 -0.012879 -0.398303 0.1288073 -0.012879 -0.37144 1.632e-3
GW 32 9 0.1288073 0.0128793 -0.32699 0.1288073 0.0128793 -0.132768 1.632e-3
GW 33 9 0.1288073 -0.012879 -0.32699 0.1288073 -0.012879 -0.132768 1.632e-3
GW 34 3 0.12880733 -0.0128793 -0.3269902 0.11610733 0 -0.3492152 1.63195e-3
GW 35 3 0.12880733 0.01287935 -0.3714402 0.11610733 0 -0.3492152 1.63195e-3
GW 36 3 0.12880733 0.01287935 -0.3269902 0.14150733 0 -0.3492152 1.63195e-3
GW 37 3 0.12880733 -0.0128793 -0.3714402 0.14150733 0 -0.3492152 1.63195e-3
GW 38 1 0.1288073 0.0128793 0.6638388 0.1288073 0.0128793 0.6369756 1.632e-3
GW 39 1 0.1288073 -0.012879 0.6638388 0.1288073 -0.012879 0.6369756 1.632e-3
GW 40 3 0.12880733 -0.0128793 0.59252564 0.14150733 0 0.61475064 1.63195e-3
GW 41 3 0.12880733 0.01287935 0.63697564 0.14150733 0 0.61475064 1.63195e-3
GW 42 3 0.12880733 0.01287935 0.59252564 0.11610733 0 0.61475064 1.63195e-3
GW 43 3 0.12880733 -0.0128793 0.63697564 0.11610733 0 0.61475064 1.63195e-3
GW 44 9 0.1288073 0.0128793 0.5925256 0.1288073 0.0128793 0.3983032 1.632e-3
GW 45 9 0.1288073 -0.012879 0.5925256 0.1288073 -0.012879 0.3983032 1.632e-3
GW 46 1 0.1288073 0.0128793 -0.663839 0.1288073 0.0128793 -0.636976 1.632e-3
GW 47 1 0.1288073 -0.012879 -0.663839 0.1288073 -0.012879 -0.636976 1.632e-3
GW 48 3 0.12880733 -0.0128793 -0.5925256 0.11610733 0 -0.6147506 1.63195e-3
GW 49 3 0.12880733 0.01287935 -0.6369756 0.11610733 0 -0.6147506 1.63195e-3
GW 50 3 0.12880733 0.01287935 -0.5925256 0.14150733 0 -0.6147506 1.63195e-3
GW 51 3 0.12880733 -0.0128793 -0.6369756 0.14150733 0 -0.6147506 1.63195e-3
GW 52 9 0.1288073 0.0128793 -0.592526 0.1288073 0.0128793 -0.398303 1.632e-3
GW 53 9 0.1288073 -0.012879 -0.592526 0.1288073 -0.012879 -0.398303 1.632e-3
GW 54 1 0.1288073 0.0128793 0.9293742 0.1288073 0.0128793 0.9025111 1.632e-3
GW 55 1 0.1288073 -0.012879 0.9293742 0.1288073 -0.012879 0.9025111 1.632e-3
GW 56 3 0.12880733 -0.0128793 0.85806112 0.14150733 0 0.88028612 1.63195e-3
GW 57 3 0.12880733 0.01287935 0.90251112 0.14150733 0 0.88028612 1.63195e-3
GW 58 3 0.12880733 0.01287935 0.85806112 0.11610733 0 0.88028612 1.63195e-3
GW 59 3 0.12880733 -0.0128793 0.90251112 0.11610733 0 0.88028612 1.63195e-3
GW 60 9 0.1288073 0.0128793 0.8580611 0.1288073 0.0128793 0.6638388 1.632e-3
GW 61 9 0.1288073 -0.012879 0.8580611 0.1288073 -0.012879 0.6638388 1.632e-3
GW 62 1 0.1288073 0.0128793 -0.929374 0.1288073 0.0128793 -0.902511 1.632e-3
GW 63 1 0.1288073 -0.012879 -0.929374 0.1288073 -0.012879 -0.902511 1.632e-3
GW 64 3 0.12880733 -0.0128793 -0.858061 0.11610733 0 -0.880286 1.63195e-3
GW 65 3 0.12880733 0.01287935 -0.902511 0.11610733 0 -0.880286 1.63195e-3
GW 66 3 0.12880733 0.01287935 -0.858061 0.14150733 0 -0.880286 1.63195e-3
GW 67 3 0.12880733 -0.0128793 -0.902511 0.14150733 0 -0.880286 1.63195e-3
GW 68 9 0.1288073 0.0128793 -0.858061 0.1288073 0.0128793 -0.663839 1.632e-3
GW 69 9 0.1288073 -0.012879 -0.858061 0.1288073 -0.012879 -0.663839 1.632e-3
GW 79 25 0 -0.4 0.9293 0 -.01 0.9293 4.7625e-3
GW 81 25 0 -0.4 0.8 0 -.01 0.8 4.7625e-3
GW 82 25 0 -0.4 0.6638 0 -.01 0.6638 4.7625e-3
GW 85 25 0 -0.4 0.525 0 -.01 0.525 4.7625e-3
GW 86 25 0 -0.4 0.3983 0 -.01 0.3983 4.7625e-3
GW 88 25 0 -0.4 0.275 0 -.01 0.275 4.7625e-3
GW 89 25 0 -0.4 0.1327 0 -.01 0.1327 4.7625e-3
GW 99 25 0 0.4 0.9293 0 .01 0.9293 4.7625e-3
GW 101 25 0 0.4 0.8 0 .01 0.8 4.7625e-3
GW 102 25 0 0.4 0.6638 0 .01 0.6638 4.7625e-3
GW 105 25 0 0.4 0.525 0 .01 0.525 4.7625e-3
GW 106 25 0 0.4 0.3983 0 .01 0.3983 4.7625e-3
GW 108 25 0 0.4 0.275 0 .01 0.275 4.7625e-3
GW 109 25 0 0.4 0.1327 0 .01 0.1327 4.7625e-3
GW 111 25 0 -0.4 0 0 -.01 0 4.7625e-3
GW 112 25 0 -0.4 -0.1328 0 -.01 -0.1328 4.7625e-3
GW 114 25 0 -0.4 -0.275 0 -.01 -0.275 4.7625e-3
GW 115 25 0 -0.4 -0.3983 0 -.01 -0.3983 4.7625e-3
GW 118 25 0 -0.4 -0.525 0 -.01 -0.525 4.7625e-3
GW 119 25 0 -0.4 -0.6638 0 -.01 -0.6638 4.7625e-3
GW 121 25 0 -0.4 -0.8 0 -.01 -0.8 4.7625e-3
GW 122 25 0 -0.4 -0.9294 0 -.01 -0.9294 4.7625e-3
GW 131 25 0 0.4 0 0 .01 0 4.7625e-3
GW 132 25 0 0.4 -0.1328 0 .01 -0.1328 4.7625e-3
GW 134 25 0 0.4 -0.275 0 .01 -0.275 4.7625e-3
GW 135 25 0 0.4 -0.3983 0 .01 -0.3983 4.7625e-3
GW 138 25 0 0.4 -0.525 0 .01 -0.525 4.7625e-3
GW 139 25 0 0.4 -0.6638 0 .01 -0.6638 4.7625e-3
GW 141 25 0 0.4 -0.8 0 .01 -0.8 4.7625e-3
GW 142 25 0 0.4 -0.9294 0 .01 -0.9294 4.7625e-3
GW 143 25 0 0.4 1.05 0 0.01 1.05 4.7625e-3
GW 144 25 0 -0.4 1.05 0 -.01 1.05 4.7625e-3
GW 145 25 0 -0.4 -1.05 0 -.01 -1.05 4.7625e-3
GW 146 25 0 0.4 -1.05 0 0.01 -1.05 4.7625e-3
GE 0
LD 5 0 0 0 2.e7
GN -1
EK
EX 0 1 1 0 1 0 0 0
FR 0 0 0 0 500 0
RP 0 1 73 1510 90 0 1 5 0 0
EN
 
#31 · (Edited)
Schoolbus

The code is for MMANA-GAL, is an antenna-analyzing tool.

Open MMANA-GAL
File->New-->Edit--->Antenna definition edit---->eraser text and paste code
->ok saved file
WEB

Download Basic version MMANA-GAL (free).

Dipole tubing ⌀ 1" and Reflector tubing ⌀ 1" conflict in 4nec2
Warn.:radius (0.5) above wlen/100 (0.219)
By this reason the antenna was modeler in Mmana-gal
NEC file:
Code:
CM Fat_Dipole_4bay_v2
CM Errors radius (0.5) above wlen/100 (0.219)
CE
GW    1    5    0    0.625    15    0    9.75    15    0.5
GW    2    5    0    -0.625    15    0    -9.75    15    0.5
GW    3    5    0    0.625    5    0    9.75    5    0.5
GW    4    5    0    -0.625    5    0    -9.75    5    0.5
GW    5    5    0    0.625    -5    0    9.75    -5    0.5
GW    6    5    0    -0.625    -5    0    -9.75    -5    0.5
GW    7    5    0    0.625    -15    0    9.75    -15    0.5
GW    8    5    0    -0.625    -15    0    -9.75    -15    0.5
GW    9    3    0    0.625    0    0    0.625    5    0.06377953
GW    10    3    0    0.625    5    0    0.625    11.25    0.06377953
GW    11    1    0    0.625    11.25    0.2519685    0    11.8740157    0.06377953
GW    12    1    0.2519685    0    11.8740157    0    -0.625    12.5    0.06377953
GW    13    1    0    -0.625    12.5    0    -0.625    15    0.06377953
GW    14    3    0    0.625    0    0    0.625    -5    0.06377953
GW    15    3    0    0.625    -5    0    0.625    -11.25    0.06377953
GW    16    1    0    0.625    -11.25    0.2519685    0    -11.874016    0.06377953
GW    17    1    0.2519685    0    -11.874016    0    -0.625    -12.5    0.06377953
GW    18    1    0    -0.625    -12.5    0    -0.625    -15    0.06377953
GW    19    3    0    -0.625    0    0    -0.625    5    0.06377953
GW    20    3    0    -0.625    5    0    -0.625    11.25    0.06377953
GW    21    1    0    -0.625    11.25    -0.2519685    0    11.8740157    0.06377953
GW    22    1    -0.2519685    0    11.8740157    0    0.625    12.5    0.06377953
GW    23    1    0    0.625    12.5    0    0.625    15    0.06377953
GW    24    3    0    -0.625    0    0    -0.625    -5    0.06377953
GW    25    3    0    -0.625    -5    0    -0.625    -11.25    0.06377953
GW    26    1    0    -0.625    -11.25    -0.2519685    0    -11.874016    0.06377953
GW    27    1    -0.2519685    0    -11.874016    0    0.625    -12.5    0.06377953
GW    28    1    0    0.625    -12.5    0    0.625    -15    0.06377953
GW    29    1    0    -0.625    0    0    0.625    0    0.47007874
GW    30    7    -6    0    20    -6    14.875    20    0.5
GW    31    7    -6    0    20    -6    -14.875    20    0.5
GW    32    7    -6    0    12    -6    14.875    12    0.5
GW    33    7    -6    0    12    -6    -14.875    12    0.5
GW    34    7    -6    0    8    -6    14.875    8    0.5
GW    35    7    -6    0    8    -6    -14.875    8    0.5
GW    36    7    -6    0    4    -6    14.875    4    0.5
GW    37    7    -6    0    4    -6    -14.875    4    0.5
GW    38    7    -6    0    0    -6    14.875    0    0.5
GW    39    7    -6    0    0    -6    -14.875    0    0.5
GW    40    7    -6    0    -4    -6    14.875    -4    0.5
GW    41    7    -6    0    -4    -6    -14.875    -4    0.5
GW    42    7    -6    0    -8    -6    14.875    -8    0.5
GW    43    7    -6    0    -8    -6    -14.875    -8    0.5
GW    44    7    -6    0    -12    -6    14.875    -12    0.5
GW    45    7    -6    0    -12    -6    -14.875    -12    0.5
GW    46    7    -6    0    -20    -6    14.875    -20    0.5
GW    47    7    -6    0    -20    -6    -14.875    -20    0.5
GW    48    5    -5    0    10    -5    0    20.75    0.5
GW    49    3    -1.125    0    10    -1.125    0    15.75    0.5
GW    50    5    -5    0    -20.75    -5    0    -10    0.5
GW    51    9    -5    0    -10    -5    0    10    0.5
GW    52    3    -1.125    0    -15.75    -1.125    0    -10    0.5
GW    53    9    -1.125    0    -10    -1.125    0    10    0.5
GW    54    3    -1.125    0    10    -5    0    10    0.12204724
GW    55    3    -1.125    0    -10    -5    0    -10    0.12204724
GW    56    7    -6    0    16    -6    14.875    16    0.5
GW    57    7    -6    0    16    -6    -14.875    16    0.5
GW    58    7    -6    0    -16    -6    14.875    -16    0.5
GW    59    7    -6    0    -16    -6    -14.875    -16    0.5
GS    0    0    0.0254        ' All in in.
GE    0
EX    0    29    1    0    1    0
GN    -1
FR    0    1    0    0    539    0
RP 0 1 360 1000 70 0 0 1 0 0
EN
File Add : Mmanagal and NEC + Simple Screen of managal paste code.
Fat_Dipole_4bay_vE1.maa
Fat_Dipole_4bay_v2.maa
Fat_Dipole_4bay_v2.nec
Fat_Dipole_4bay_vE1.nec
All the archives this here: Fat_Dipole_4bay
 
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