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Discussion Starter #1
I have been playing with 4nec2 trying to get a indoor antenna with good vhf.

I used the Kosmic SuperQuad (no reflector) nec, and added a loop to it and re-scaled it 1 to 2 % larger.


UHF 9 db to 11.85 db
VHF-HI channel 7.2 db to 6.3 db



Would someone double check my nec model, to make sure that are no mistakes in it.



Code:
CM Kosmic SuperQuad 4-Bay, NO Reflector, 4nec2 by holl_ands, 1Mar2010
CM Simple SOURCE Wire. Autosegment(21).  Several "Too Sharp" Warnings.
CE
GW	1	3	0	-0.76125	0	0	0.76125	0	0.041615
GW	4	13	0	10.3266486	7.35875	0	0.76125	4.82125	0.0634375
GW	5	13	0	10.3266486	2.28375	0	0.76125	4.82125	0.0634375
GW	6	13	0	-0.76125	4.82125	0	-10.326651	7.35875	0.0634375
GW	7	13	0	-0.76125	4.82125	0	-10.326651	2.28375	0.0634375
GW	8	13	0	10.3266486	-7.35875	0	0.76125	-4.82125	0.0634375
GW	9	13	0	10.3266486	-2.28375	0	0.76125	-4.82125	0.0634375
GW	10	13	0	-0.76125	-4.82125	0	-10.326651	-7.35875	0.0634375
GW	11	13	0	-0.76125	-4.82125	0	-10.326651	-2.28375	0.0634375
GW	12	13	0	10.3266486	17.00125	0	0.76125	14.46375	0.0634375
GW	13	13	0	10.3266486	11.92625	0	0.76125	14.46375	0.0634375
GW	14	13	0	-0.76125	14.46375	0	-10.326651	17.00125	0.0634375
GW	15	13	0	-0.76125	14.46375	0	-10.326651	11.92625	0.0634375
GW	16	13	0	10.3266486	-17.00125	0	0.76125	-14.46375	0.0634375
GW	17	13	0	10.3266486	-11.92625	0	0.76125	-14.46375	0.0634375
GW	18	13	0	-0.76125	-14.46375	0	-10.326651	-17.00125	0.0634375
GW	19	13	0	-0.76125	-14.46375	0	-10.326651	-11.92625	0.0634375
GW	20	1	0	0.76125	14.46375	0	0.76125	13.575625	0.0634375
GW	21	1	0	-0.76125	14.46375	0	-0.76125	13.575625	0.0634375
GW	22	1	0	0.76125	5.455625	0	0.76125	4.82125	0.0634375
GW	23	1	0	-0.76125	5.455625	0	-0.76125	4.82125	0.0634375
GW	24	5	0	-0.76125	5.455625	0.634375	0	9.515625	0.0634375
GW	25	5	0	0.76125	13.575625	0.634375	0	9.515625	0.0634375
GW	26	5	0	0.76125	5.455625	-0.634375	0	9.515625	0.0634375
GW	27	5	0	-0.76125	13.575625	-0.634375	0	9.515625	0.0634375
GW	28	1	0	0.76125	-14.46375	0	0.76125	-13.575625	0.0634375
GW	29	1	0	-0.76125	-14.46375	0	-0.76125	-13.575625	0.0634375
GW	30	1	0	0.76125	-5.455625	0	0.76125	-4.82125	0.0634375
GW	31	1	0	-0.76125	-5.455625	0	-0.76125	-4.82125	0.0634375
GW	32	5	0	-0.76125	-5.455625	-0.634375	0	-9.515625	0.0634375
GW	33	5	0	0.76125	-13.575625	-0.634375	0	-9.515625	0.0634375
GW	34	5	0	0.76125	-5.455625	0.634375	0	-9.515625	0.0634375
GW	35	5	0	-0.76125	-13.575625	0.634375	0	-9.515625	0.0634375
GW	36	7	0	0.76125	4.82125	0	0.76125	0	0.0634375
GW	37	7	0	-0.76125	4.82125	0	-0.76125	0	0.0634375
GW	38	7	0	0.76125	-4.82125	0	0.76125	0	0.0634375
GW	39	7	0	-0.76125	-4.82125	0	-0.76125	0	0.0634375
GW	40	27	0	-11.165	17.7625	0	11.165	17.7625	1.09111882
GW	41	27	0	-11.165	-17.7625	0	11.165	-17.7625	1.09111882
GW	42	43	0	-11.165	17.7625	0	-11.165	-17.7625	1.09111882
GW	43	43	0	11.165	17.7625	0	11.165	-17.7625	1.09111882
GS	0	0	0.0254		' All in in.
GE	0
EK
LD	5	0	0	0	1.67e7	0
EX	0	1	2	0	1	0
GN	-1
FR	0	1	0	0	470	0
RP 0 1 73 1510 90 0 1 5 0 0

Just imagine VHF-HI 6.5 DB.

Just might make a good indoor antenna.

Imagine how many DB's, it would get if it had a reflector on it!
 

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Lassar
I tried modeling your .nec file with 4nec2. It looks like your .nec file has a loop made of 2" tubing. They are intersecting with the wiskers, and won't work. I took the "1" off of the loop element size, making them 0.09111882, and was able to model the antenna. Was this the dimension that you meant to use? Consider changing the parameters on the Freq./Ground tab, in the editor, to Freq.-Start = 174, Nr Step to 40, and Stepsize to 12 and check box "Sweep". This will graph a sweep that includes Hi-VHF and UHF bands. This creates a FR card/line in the .nec file that looks like this "FR 0 40 0 0 174 12". When I did this, it looks like the antenna reception is right at 5db across most of the Hi-VHF band. Let me know what diameter you had intended, for the loop elements, and then we can look at the results.
 

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Discussion Starter #3 (Edited)
I am new at this 4nec2 antenna modeling.

I simply drew a rectangle around the Kosmic SuperQuad.

A good diameter is 10 guage wire.

That VHF-High DB number sounds more right.

VHF-HIGH 5db is still pretty good for a 4 bay bow tie antenna.

That loop added 1.5 DB VHF-HI to the SuperQuad.

A loop usually adds 1 DB to a antenna.

Not bad.
 

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Lassar
I was intrigued with your idea of putting the the Kosmic Superquad inside of a frame. I redid the .nec file, so that I could test different parameters. This is what I came up with. Once you learn how to use symbols/parameters, it makes it easy to scale the antenna, by changing symbol "Scale", and changing almost any other element by changing it's value on the symbol page, in the editor.

Code:
CM Kosmic SuperQuad 4-Bay, NO Reflector, 4nec2 by holl_ands, 1Mar2010
CM Simple SOURCE Wire. Autosegment(21).  Several "Too Sharp" Warnings.
CM  Calculated from above INPUT Values:
CM   #	segs	X1	  Y1	Z1	X2	  Y2		Z2	radius
CM  SIMULATED BALUN SOURCE ON GW1:
CM  GW2 Not used
CM  GW3 Not used
CM  INNER BOWTIES:
CM  OUTER BOWTIES:
CM  CROSS-OVER FEEDLINE:
CM  FR Freq Sweep choices in order of increasing calculation time (fm holl_ands):
CM  FR 0 0 0 0 470 0		
CM  FR 0 34 0 0 410 12		
CM  FR 0 39 0 0 470 6		
CM  FR 0 77 0 0 470 3		
CM  FR 0 153 0 0 470 1.5		
CM  FR 0 71 0 0 300 10		
CM  FR Hi-VHF choices:
CM  FR 0 15 0 0 174 3		
CM  FR 0 29 0 0 174 1.5		
CM  FR 0 43 0 0 174 1		
CM  FR 0 26 0 0 150 6		
CM  FR Lo-VHF choices:
CM  FR 0 35 0 0 54 1		
CM  FR 0 36 0 0 75 1		
CM  FR 0 28 0 0 54 6		
CM  FR 0 64 0 0 54 12		
CM  RP choices in order of increasing calculation time:
CM  RP 0 1 1 1510 90 90 1 1 0 0	
CM  RP 0 1 1 1510 90 0 1 1 0 0		
CM  RP 0 1 1 1510 90 180 1 1 0 0	
CM  RP 0 1 37 1510 90 0 1 5 0 0 	
CM  RP 0 73 1 1510 90 0 5 1 0 0 	
CM  RP 0 73 73 1510 90 0 5 5 0 0 	
CM  RP 0 285 73 1510 90 0 5 5 0 0	
CE
SY Scale=1.15
SY sc=Scale
SY Rsrc=0.024	'SOURCE wire Radius. Adjust for AGT=1.0: UHF(533)=0.019 & HiVHF(198)=0.029
SY Rbow=0.0625	'Radius (in inches) of BOWTIE elements    0.0625
SY Rfeed=0.0625	'FEEDLINE wire Radius (in case they're different)
SY Rloop=0.3125	'0.3125
SY ZBowII=9.5	'Distance between the Centers of the two INNER bowties
SY ZBowOI=9.5	'From Center of INNER bowtie to Center of OUTER bowtie
SY BowLen=10.28784	'Bow Half-Length - Assume all SAME (Reality +/- 0.25+ in)
SY BowSep=2.970535	'Bow Tine Separation - Assume all SAME (Reality +/- 0.25 in)
SY FedSep=1.5	'Separation (in inches) between two FEEDLINE wires
SY Hop=1.25	'Separation between Feedlines at Crossover   1.25
SY ZCross=4.875	'From Center of Feedline Crossover to Center of OUTER bowtie
SY ZClen=4.0	'From Center of Feedline Crossover to Inflection point
SY Cond=3.0e7	'Conductivity (Copper=3.0e7, Alum=2.0e7, StainlessSteel=1.67e7)
SY LoophighDelta=5.0	'6.0    5.0
SY LoopwideDelta=0.57
SY ZBowInr=ZBowII/2	'Distance from antenna center to center of INNER bowtie
SY ZBowOut=ZBowII/2+ZBowOI	'Distance from antenna center to center of OUTER bowtie
SY Z1=ZBowOut+BowSep/2
SY Z2=ZBowOut
SY Z3=ZBowOut-BowSep/2
SY Z4=ZBowOut-ZCross+ZClen	'Very long crossover region
SY Z5=ZBowOut-ZCross
SY Z6=ZBowOut-ZCross-ZClen	'Very long crossover region
SY Z7=ZBowInr+BowSep/2
SY Z8=ZBowInr
SY Z9=ZBowInr-BowSep/2
SY YBowN=-FedSep/2
SY YBowP=FedSep/2
SY YBow=(BowLen^2-(BowSep/2)^2)^0.5
SY Ymax=YBow+FedSep/2
SY Loophigh=Z1+LoophighDelta
SY Lh=Loophigh
SY Loopwide=Ymax+Loopwidedelta
SY Lw=Loopwide
GW	1	3	0	YBowN*sc	0	0	YBowP*sc	0	Rsrc
GW	4	21	0	Ymax*sc	Z7*sc	0	YBowP*sc	Z8*sc	Rbow
GW	5	21	0	Ymax*sc	Z9*sc	0	YBowP*sc	Z8*sc	Rbow
GW	6	21	0	YBowN*sc	Z8*sc	0	-Ymax*sc	Z7*sc	Rbow
GW	7	21	0	YBowN*sc	Z8*sc	0	-Ymax*sc	Z9*sc	Rbow
GW	8	21	0	Ymax*sc	-Z7*sc	0	YBowP*sc	-Z8*sc	Rbow
GW	9	21	0	Ymax*sc	-Z9*sc	0	YBowP*sc	-Z8*sc	Rbow
GW	10	21	0	YBowN*sc	-Z8*sc	0	-Ymax*sc	-Z7*sc	Rbow
GW	11	21	0	YBowN*sc	-Z8*sc	0	-Ymax*sc	-Z9*sc	Rbow
GW	12	21	0	Ymax*sc	Z1*sc	0	YBowP*sc	Z2*sc	Rbow
GW	13	21	0	Ymax*sc	Z3*sc	0	YBowP*sc	Z2*sc	Rbow
GW	14	21	0	YBowN*sc	Z2*sc	0	-Ymax*sc	Z1*sc	Rbow
GW	15	21	0	YBowN*sc	Z2*sc	0	-Ymax*sc	Z3*sc	Rbow
GW	16	21	0	Ymax*sc	-Z1*sc	0	YBowP*sc	-Z2*sc	Rbow
GW	17	21	0	Ymax*sc	-Z3*sc	0	YBowP*sc	-Z2*sc	Rbow
GW	18	21	0	YBowN*sc	-Z2*sc	0	-Ymax*sc	-Z1*sc	Rbow
GW	19	21	0	YBowN*sc	-Z2*sc	0	-Ymax*sc	-Z3*sc	Rbow
GW	20	3	0	YBowP*sc	Z2*sc	0	YBowP*sc	Z4*sc	Rfeed
GW	21	3	0	YBowN*sc	Z2*sc	0	YBowN*sc	Z4*sc	Rfeed
GW	22	1	0	YBowP*sc	Z6*sc	0	YBowP*sc	Z8*sc	Rfeed
GW	23	1	0	YBowN*sc	Z6*sc	0	YBowN*sc	Z8*sc	Rfeed
GW	24	9	0	YBowN*sc	Z6*sc	(Hop/2)*sc	0	Z5*sc	Rfeed
GW	25	9	0	YBowP*sc	Z4*sc	(Hop/2)*sc	0	Z5*sc	Rfeed
GW	26	9	0	YBowP*sc	Z6*sc	(-Hop/2)*sc	0	Z5*sc	Rfeed
GW	27	9	0	YBowN*sc	Z4*sc	(-Hop/2)*sc	0	Z5*sc	Rfeed
GW	28	3	0	YBowP*sc	-Z2*sc	0	YBowP*sc	-Z4*sc	Rfeed
GW	29	3	0	YBowN*sc	-Z2*sc	0	YBowN*sc	-Z4*sc	Rfeed
GW	30	1	0	YBowP*sc	-Z6*sc	0	YBowP*sc	-Z8*sc	Rfeed
GW	31	1	0	YBowN*sc	-Z6*sc	0	YBowN*sc	-Z8*sc	Rfeed
GW	32	9	0	YBowN*sc	-Z6*sc	(-Hop/2)*sc	0	-Z5*sc	Rfeed
GW	33	9	0	YBowP*sc	-Z4*sc	(-Hop/2)*sc	0	-Z5*sc	Rfeed
GW	34	9	0	YBowP*sc	-Z6*sc	(Hop/2)*sc	0	-Z5*sc	Rfeed
GW	35	9	0	YBowN*sc	-Z4*sc	(Hop/2)*sc	0	-Z5*sc	Rfeed
GW	36	11	0	YBowP*sc	Z8*sc	0	YBowP*sc	0	Rfeed
GW	37	11	0	YBowN*sc	Z8*sc	0	YBowN*sc	0	Rfeed
GW	38	11	0	YBowP*sc	-Z8*sc	0	YBowP*sc	0	Rfeed
GW	39	11	0	YBowN*sc	-Z8*sc	0	YBowN*sc	0	Rfeed
GW	40	27	0	-Lw*sc	Lh*sc	0	Lw*sc	Lh*sc	Rloop
GW	41	27	0	-Lw*sc	-Lh*sc	0	Lw*sc	-Lh*sc	Rloop
GW	42	43	0	-Lw*sc	Lh*sc	0	-Lw*sc	-Lh*sc	Rloop
GW	43	43	0	Lw*sc	Lh*sc	0	Lw*sc	-Lh*sc	Rloop
GS	0	0	0.0254
GE	0
LD	5	0	0	0	Cond	'Conductivity
GN	-1
EK
EX	0	1	2	0	1	0	0	'GW1 is SOURCE wire
FR	0	38	0	0	174	12
RP	0	1	73	1510	90	0	1	5	0	0
EN
I modeled it using 1/2" copper tubing, to make the frame, and it modeled better than with smaller diameter wire, for the frame. I think that the copper tubing would make a great framework, to support the inner elements, possibly with pvc tubing. I scaled it up, by a factor of 1.15, from the original. SWR is within reason for UHF and Hi-vhf. Impedance is a bit high on the UHF and a bit low on the Hi-VHF, but this seem typical for combo antennas. Look at it and see what you think. Lets also see what others think.
 

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Lasser
If you make the SuperQuid with solid triangles, you can get extra uhf gain of 1 db.
Thanks for the suggestion. I tried modeling some different triangles, such as solid triangles, wiskers, and wire loop triangles. Yurrii also did some models of these options. https://ypylypenko.livejournal.com/80984.html. Depending on the model you use, in 4nec2, you sometimes give you between 1/2 and 1db gain for solid and loop triangles, but sometimes, depending on the segmentation, the gain seems to go away. I tried using solid and loop triangles, but in "SuperQuad with loop" design, and they interact poorly with the loop around the antenna. They caused a lot of problems with SWR and made it hard to adjust AGT. I went back to standard wiskers, and had more luck.
This is as far as I've been able to go, with the design so far. It's producing pretty good results. Hi-VHF from 8.75db to 8.99db and UHF above 14.0db across the new repack band. SWR and Impedance are very good. Remove the reflectors and you still have Hi-VHF from 5.4DB to 5.88db and UHF from 10.89db to 12.49db to 12.19db. SWR is a bit high at 470mhz, but quickly drops below 2.0.

Pretty good numbers from a fairly easy to build antenna.



Code:
CM Based on Kosmic SuperQuad 4-Bay, NO Reflector, 4nec2 by holl_ands, 1Mar2010
CM Added Loop around antenna to improve Hi-VHF performance.
CM Modeled the Loop from 1/2" copper plumbing pipe with four 90degree elbows. 
CM Added 9 equal reflectors spaced to improve Hi-VHF performance.
CM Simple SOURCE Wire. Modeled without Autoseg.   Autosegment(15) can be used.
CM Source wire sized to be half way between Hi-VHF and UHF
CM Antenna can be built without reflectors.  Remove wire 42-50(Tag 51-59) and 
CM set Rsrc to 0.0499    AGT=1.0  UHF(540)=0.589   &   HiVHF(198)=0.0409 - No Reflectors
CE
SY Scale=1.0
SY sc=Scale
SY Rsrc=0.0478	'SOURCE wire Radius. Adjust for AGT=1.0:           UHF(540)=0.533   &   HiVHF(198)=0.0423
SY Rbow=0.0625	'Radius (in inches) of BOWTIE elements    0.0625
SY Rfeed=0.0625	'FEEDLINE wire Radius (in case they're different)
SY Rloop=0.3125	'0.3125       1/2" copper tubing (5/8"od)
SY Rrefl=0.125	'0.125         1/4" rods    SWR slightly better with 1/2" tubing
SY ZBowII=12.0	'Distance between the Centers of the two INNER bowties    12.0
SY ZBowOI=12.0	'From Center of INNER bowtie to Center of OUTER bowtie    12.0
SY BowLen=10.625	'Bow Half-Length - Assume all SAME (Reality +/- 0.25+ in)    10.625
SY BowSep=3.25	'Bow Tine Separation - Assume all SAME (Reality +/- 0.25 in)         3.25
SY FedSep=1.556	'Separation (in inches) between two FEEDLINE wires           2.25    1.556
SY Hop=FedSep	'Separation between Feedlines at Crossover                       Same as FedSep to work with PVC center support.
SY ZCross=5.3125	'From Center of Feedline Crossover to Center of OUTER bowtie        5.3125
SY ZClen=4.375	'From Center of Feedline Crossover to Inflection point       4.375
SY Cond=3.0e7	'Conductivity (Copper=3.0e7, Alum=2.0e7, StainlessSteel=1.67e7)
SY LoophighDelta=5.5	'5.5     7.875 better for UHF
SY LoopwideDelta=0.5625	'.4375  1/8" gap              0.5625 for 1/4" gap
SY Reflector0=50.25	'Length of center reflectors       46.3125      51.125
SY Reflector1=Reflector0	'Length of first reflectors
SY Reflector2=Reflector0	'Length of second reflectors
SY Reflector3=Reflector0	'Length of third reflectors
SY Reflector4=Reflector0	'Length of fourth reflectors
SY Rdback=15.25	'15.8125
SY ZBowInr=ZBowII/2	'Distance from antenna center to center of INNER bowtie
SY ZBowOut=ZBowII/2+ZBowOI	'Distance from antenna center to center of OUTER bowtie
SY Z1=ZBowOut+BowSep/2
SY Z2=ZBowOut
SY Z3=ZBowOut-BowSep/2
SY Z4=ZBowOut-ZCross+ZClen	'Very long crossover region
SY Z5=ZBowOut-ZCross
SY Z6=ZBowOut-ZCross-ZClen	'Very long crossover region
SY Z7=ZBowInr+BowSep/2
SY Z8=ZBowInr
SY Z9=ZBowInr-BowSep/2
SY Z10=(Z2+Z8)/2
SY Z11=Z8*4
SY YBowN=-FedSep/2
SY YBowP=FedSep/2
SY YBow=(BowLen^2-(BowSep/2)^2)^0.5
SY Ymax=YBow+FedSep/2
SY Loophigh=Z1+LoophighDelta
SY Lh=Loophigh
SY Loopwide=Ymax+Loopwidedelta
SY Lw=Loopwide
SY R0Ypos=Reflector0/2
SY R1Ypos=Reflector1/2
SY R2Ypos=Reflector2/2
SY R3Ypos=Reflector3/2
SY R4Ypos=Reflector4/2
GW	1	3	0	YBowN*sc	0	0	YBowP*sc	0	Rsrc
GW	4	7	0	Ymax*sc	Z7*sc	0	YBowP*sc	Z8*sc	Rbow
GW	5	7	0	Ymax*sc	Z9*sc	0	YBowP*sc	Z8*sc	Rbow
GW	6	7	0	YBowN*sc	Z8*sc	0	-Ymax*sc	Z7*sc	Rbow
GW	7	7	0	YBowN*sc	Z8*sc	0	-Ymax*sc	Z9*sc	Rbow
GW	8	7	0	Ymax*sc	-Z7*sc	0	YBowP*sc	-Z8*sc	Rbow
GW	9	7	0	Ymax*sc	-Z9*sc	0	YBowP*sc	-Z8*sc	Rbow
GW	10	7	0	YBowN*sc	-Z8*sc	0	-Ymax*sc	-Z7*sc	Rbow
GW	11	7	0	YBowN*sc	-Z8*sc	0	-Ymax*sc	-Z9*sc	Rbow
GW	12	7	0	Ymax*sc	Z1*sc	0	YBowP*sc	Z2*sc	Rbow
GW	13	7	0	Ymax*sc	Z3*sc	0	YBowP*sc	Z2*sc	Rbow
GW	14	7	0	YBowN*sc	Z2*sc	0	-Ymax*sc	Z1*sc	Rbow
GW	15	7	0	YBowN*sc	Z2*sc	0	-Ymax*sc	Z3*sc	Rbow
GW	16	7	0	Ymax*sc	-Z1*sc	0	YBowP*sc	-Z2*sc	Rbow
GW	17	7	0	Ymax*sc	-Z3*sc	0	YBowP*sc	-Z2*sc	Rbow
GW	18	7	0	YBowN*sc	-Z2*sc	0	-Ymax*sc	-Z1*sc	Rbow
GW	19	7	0	YBowN*sc	-Z2*sc	0	-Ymax*sc	-Z3*sc	Rbow
GW	20	1	0	YBowP*sc	Z2*sc	0	YBowP*sc	Z4*sc	Rfeed
GW	21	1	0	YBowN*sc	Z2*sc	0	YBowN*sc	Z4*sc	Rfeed
GW	22	1	0	YBowP*sc	Z6*sc	0	YBowP*sc	Z8*sc	Rfeed
GW	23	1	0	YBowN*sc	Z6*sc	0	YBowN*sc	Z8*sc	Rfeed
GW	24	3	0	YBowN*sc	Z6*sc	(Hop/2)*sc	0	Z5*sc	Rfeed
GW	25	3	0	YBowP*sc	Z4*sc	(Hop/2)*sc	0	Z5*sc	Rfeed
GW	26	3	0	YBowP*sc	Z6*sc	(-Hop/2)*sc	0	Z5*sc	Rfeed
GW	27	3	0	YBowN*sc	Z4*sc	(-Hop/2)*sc	0	Z5*sc	Rfeed
GW	28	1	0	YBowP*sc	-Z2*sc	0	YBowP*sc	-Z4*sc	Rfeed
GW	29	1	0	YBowN*sc	-Z2*sc	0	YBowN*sc	-Z4*sc	Rfeed
GW	30	1	0	YBowP*sc	-Z6*sc	0	YBowP*sc	-Z8*sc	Rfeed
GW	31	1	0	YBowN*sc	-Z6*sc	0	YBowN*sc	-Z8*sc	Rfeed
GW	32	3	0	YBowN*sc	-Z6*sc	(-Hop/2)*sc	0	-Z5*sc	Rfeed
GW	33	3	0	YBowP*sc	-Z4*sc	(-Hop/2)*sc	0	-Z5*sc	Rfeed
GW	34	3	0	YBowP*sc	-Z6*sc	(Hop/2)*sc	0	-Z5*sc	Rfeed
GW	35	3	0	YBowN*sc	-Z4*sc	(Hop/2)*sc	0	-Z5*sc	Rfeed
GW	36	3	0	YBowP*sc	Z8*sc	0	YBowP*sc	0	Rfeed
GW	37	3	0	YBowN*sc	Z8*sc	0	YBowN*sc	0	Rfeed
GW	38	3	0	YBowP*sc	-Z8*sc	0	YBowP*sc	0	Rfeed
GW	39	3	0	YBowN*sc	-Z8*sc	0	YBowN*sc	0	Rfeed
GW	40	11	0	-Lw*sc	Lh*sc	0	Lw*sc	Lh*sc	Rloop
GW	41	11	0	-Lw*sc	-Lh*sc	0	Lw*sc	-Lh*sc	Rloop
GW	42	23	0	-Lw*sc	Lh*sc	0	-Lw*sc	-Lh*sc	Rloop
GW	43	23	0	Lw*sc	Lh*sc	0	Lw*sc	-Lh*sc	Rloop
GW	51	19	-Rdback*sc	-R0Ypos*sc	0	-Rdback*sc	R0Ypos*sc	0	Rrefl
GW	52	19	-Rdback*sc	-R1Ypos*sc	Z8*sc	-Rdback*sc	R1Ypos*sc	Z8*sc	Rrefl
GW	53	19	-Rdback*sc	-R1Ypos*sc	-Z8*sc	-Rdback*sc	R1Ypos*sc	-Z8*sc	Rrefl
GW	54	19	-Rdback*sc	-R2Ypos*sc	Z10*sc	-Rdback*sc	R2Ypos*sc	Z10*sc	Rrefl
GW	55	19	-Rdback*sc	-R2Ypos*sc	-Z10*sc	-Rdback*sc	R2Ypos*sc	-Z10*sc	Rrefl
GW	56	19	-Rdback*sc	-R3Ypos*sc	Z2*sc	-Rdback*sc	R3Ypos*sc	Z2*sc	Rrefl
GW	57	19	-Rdback*sc	-R3Ypos*sc	-Z2*sc	-Rdback*sc	R3Ypos*sc	-Z2*sc	Rrefl
GW	58	19	-Rdback*sc	-R4Ypos*sc	Z11*sc	-Rdback*sc	R4Ypos*sc	Z11*sc	Rrefl
GW	59	19	-Rdback*sc	-R4Ypos*sc	-Z11*sc	-Rdback*sc	R4Ypos*sc	-Z11*sc	Rrefl
GS	0	0	0.0254
GE	0
LD	5	0	0	0	Cond	'Conductivity
GN	-1
EK
EX	0	1	2	0	1	0	0	'GW1 is SOURCE wire
FR	0	38	0	0	174	12
RP	0	1	73	1510	90	0	1	5	0	0
EN
I designed an easy PVC frame, that will fit inside the copper tubing frame, and support the wiskers and feed lines, creating a bombproof design. Yellow is the PVC frame. White is the copper loop and the element. Wiskers ends fit inside the PVC, in holes drilled at the appropriate location, but are insulated from the loop. by the other side of the PVC tube. Feed fits alongside the center PVC tube, and the crossover wraps around the tube.



I did a little work with different length reflectors, but never got enough improvement, to make it worth the increase in simplicity, of the equal length reflectors. Maybe someone with some Covid-19 time on their hands, could improve the design with un-equal length reflectors. I did have some luck, at certain frequencies with very long(85") reflector elements. Element lengths are designed as variables, so it's easy to just change the numbers, on the symbols page, in the editor. Just replace "Reflector0", with your length, on line 20 thru 23.

Let me know what you think, and if you have any questions.
 

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Discussion Starter #7
I had liked my ff4 with nadrods.

But when I rescaled yours for channel 36, (605 mhz, My weakest and last local channel), I changed my mind.

UHF db gain on channel 36 was 12.8 db.
VHF gain on channel 11 was 6db.

Your design is way better then "ff4 with nadors"

Every thing on my rescaled version looks pretty good, except the vhf impedance is off.

I have looked at other good antenna nec examples, such as bowtie whiskers, and it seems that their impedance's are often way off.

How did you get your vhf impedance and gain so flat.

I assumed I could use electrical conduit instead of copper pipe for the loop.

Here is my re-scaled nec.(The only thing I did was remove the reflector, and re scaled it for 605 MHz.


Code:
CM Simple SOURCE Wire. Modeled without Autoseg.   Autosegment(15) can be used.
CM Source wire sized to be half way between Hi-VHF and UHF
CM Antenna can be built without reflectors.  Remove wire 42-50(Tag 51-59) and 
CM set Rsrc to 0.0499    AGT=1.0  UHF(540)=0.589   &   HiVHF(198)=0.0409 - No Reflectors
CE
GW	1	1	0	-0.7541787	0	0	0.75417865	0	0.04633643
GW	4	7	0	10.9326823	7.39153243	0	0.75417865	5.81628781	0.06058634
GW	5	7	0	10.9326823	4.2410432	0	0.75417865	5.81628781	0.06058634
GW	6	7	0	-0.7541787	5.81628781	0	-10.932683	7.39153243	0.06058634
GW	7	7	0	-0.7541787	5.81628781	0	-10.932683	4.2410432	0.06058634
GW	8	7	0	10.9326823	-7.3915325	0	0.75417865	-5.8162878	0.06058634
GW	9	7	0	10.9326823	-4.2410433	0	0.75417865	-5.8162878	0.06058634
GW	10	7	0	-0.7541787	-5.8162878	0	-10.932683	-7.3915325	0.06058634
GW	11	7	0	-0.7541787	-5.8162878	0	-10.932683	-4.2410433	0.06058634
GW	12	7	0	10.9326823	19.0241082	0	0.75417865	17.4488634	0.06058634
GW	13	7	0	10.9326823	15.8736189	0	0.75417865	17.4488634	0.06058634
GW	14	7	0	-0.7541787	17.4488634	0	-10.932683	19.0241082	0.06058634
GW	15	7	0	-0.7541787	17.4488634	0	-10.932683	15.8736189	0.06058634
GW	16	7	0	10.9326823	-19.024108	0	0.75417865	-17.448863	0.06058634
GW	17	7	0	10.9326823	-15.873619	0	0.75417865	-17.448863	0.06058634
GW	18	7	0	-0.7541787	-17.448863	0	-10.932683	-19.024108	0.06058634
GW	19	7	0	-0.7541787	-17.448863	0	-10.932683	-15.873619	0.06058634
GW	20	1	0	0.75417865	17.4488634	0	0.75417865	16.5400685	0.06058634
GW	21	1	0	-0.7541787	17.4488634	0	-0.7541787	16.5400685	0.06058634
GW	22	1	0	0.75417865	8.05798209	0	0.75417865	5.81628781	0.06058634
GW	23	1	0	-0.7541787	8.05798209	0	-0.7541787	5.81628781	0.06058634
GW	24	3	0	-0.7541787	8.05798209	0.75417865	0	12.2990252	0.06058634
GW	25	3	0	0.75417865	16.5400685	0.75417865	0	12.2990252	0.06058634
GW	26	3	0	0.75417865	8.05798209	-0.7541787	0	12.2990252	0.06058634
GW	27	3	0	-0.7541787	16.5400685	-0.7541787	0	12.2990252	0.06058634
GW	28	1	0	0.75417865	-17.448863	0	0.75417865	-16.540069	0.06058634
GW	29	1	0	-0.7541787	-17.448863	0	-0.7541787	-16.540069	0.06058634
GW	30	1	0	0.75417865	-8.0579821	0	0.75417865	-5.8162878	0.06058634
GW	31	1	0	-0.7541787	-8.0579821	0	-0.7541787	-5.8162878	0.06058634
GW	32	3	0	-0.7541787	-8.0579821	-0.7541787	0	-12.299025	0.06058634
GW	33	3	0	0.75417865	-16.540069	-0.7541787	0	-12.299025	0.06058634
GW	34	3	0	0.75417865	-8.0579821	0.75417865	0	-12.299025	0.06058634
GW	35	3	0	-0.7541787	-16.540069	0.75417865	0	-12.299025	0.06058634
GW	36	3	0	0.75417865	5.81628781	0	0.75417865	0	0.06058634
GW	37	3	0	-0.7541787	5.81628781	0	-0.7541787	0	0.06058634
GW	38	3	0	0.75417865	-5.8162878	0	0.75417865	0	0.06058634
GW	39	3	0	-0.7541787	-5.8162878	0	-0.7541787	0	0.06058634
GW	40	13	0	-11.47796	24.3557053	0	11.4779594	24.3557053	0.30293167
GW	41	13	0	-11.47796	-24.355706	0	11.4779594	-24.355706	0.30293167
GW	42	29	0	-11.47796	24.3557053	0	-11.47796	-24.355706	0.30293167
GW	43	29	0	11.4779594	24.3557053	0	11.4779594	-24.355706	0.30293167
GS	0	0	0.0254		' All in in.
GE	0
EK
LD	5	0	0	0	3.e7	0
EX	0	1	1	0	1	0
GN	-1
FR	0	1	0	0	174	0
RP 0 1 73 1510 90 0 1 5 0 0
 

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Lassar
Your model looks pretty good. You will need to adjust the radius of the source wire to get AGT=1.0, to get more accurate gain numbers. I normally check AGT at 198mhz and 540mhz. These numbers are approximately the center of the Hi-VHF and UHF(repack) bands. Since it looks like channel 11(201mhz) and channel 36(605mhz) are your problem channels, I'd go ahead and use these numbers for testing. It looks like, if you adjust for these numbers, I get 12.78db gain at 605mhz and closer to 5.5db at 201mhz. Those are still pretty good numbers.

Every thing on my rescaled version looks pretty good, except the vhf impedance is off.
If you model my antenna without the reflectors, before you scale it, you would see that my antenna, without the reflectors, also has much lower impedance numbers, in the Hi-VHF range. Adding the reflectors, and carefully sizing them helped this somewhat, but I never could get it above 250mhz. As you said, this seems to be a problem with antennas that try to cover the Hi=VHF and UHF bands. Adjusting SWR, Gain, and Impedance, just requires making small changes, to different dimensions and seeing what factors it improves and what gets worse. Using the symbols/variables, in the editor, allows me to quickly make changes, and seeing how it affects SWR. gain, and impedance. Just change one number in the symbol page, and all affected points are changed, and I can quickly recheck the model. to see if I improved the antenna or made it worse.

Getting the AGT number as close to 1.0 is important to get correct gain numbers from 4nec2. I don't check it after every small change, but i check it every few changes. Getting SWR as close to 1.0 helps your gain figures. Keeping it below 2.7 is just a guideline. Anything above 1.0 causes a reduction in actual gain, and you can actually calculate these numbers. As a beginner, I'd just try to reduce SWR and don't worry as long as it's below 2.7(2.0 is a better target). The importance of impedance matching will depend somewhat on your actual antenna setup. The wire that takes the signal from your antenna to the tuner will have some built in loss. All wires and connectors have an ideal impedance. The closer the Impedance of your antenna matches the ideal impedance of the wire and connector, the less loss you will have. If your setup has very few connectors, and a very short wire run, then impedance mismatch will have less impact on your reception. It becomes more important, to match impedance, if you have a long cable run, or if you have a lot of connectors. The only important antenna design factor, that we haven't looked at is reception pattern. This is what you see displayed in the pattern window. A long thin pointed pattern usually has high gain, but becomes harder to aim. A nice round pattern usually has less gain, but is easier to aim. Designs without a reflector usually have equal patterns on both sides of the center. This means that you are getting reception from both sides of the antenna. If the pattern is long/large on one side, but small/thin on the other side, then the reflector is blocking the signal from the back side. This is sometimes valuable if you are trying to get a signal from one direction, that is being interfered with by a signal coming from the rear, that is on the same frequency.

All that being said, I think that this design is good enough, to try a build. All of the modeling, in the world, has to eventually be built and tested. Once you build it, then you can begin experimenting with location, angle, and other factors to see if it's going to work.
 

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Discussion Starter #9
Was doing some research on LTE.

Found out, that after the repack auctions in the US, the channels changed, and turns out
channel 36 is usually the highest channel one can get in the US.

There might be some rare locations, where there is another other channel that is higher.


Do you know anything about 1/4 wavelength filters?

Need to make 1/4 wavelength filter (RG6 coaxial) for 635 Mhz. (T-mobile's LTE).

Just don't know how wide a bandwidth, this notch filter would cover.
 

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Lassar

I assumed I could use electrical conduit instead of copper pipe for the loop.
I got to wondering how you were going to create the corners, using the electrical conduit. It will only make a difference, if you don't maintain an electrical continuity around the corner. Just to check how much difference it will make, I modeled the antenna with the loop elements almost, but not touching, at the corners. It creates some unique results. The gain, in the upper Hi-VHF band actually increased, but there was a drop, in the gain, in the upper UHF band. Electrical conduit shouldn't make a difference, as long as you have electrical continuity around the corners.

Lawrence
 

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Discussion Starter #11 (Edited)
What is the difference between your antenna model with the reflectors, and model without the
reflectors.

Looks like you used different radius wires.

Are you using 14 AWG wire for the bowties?

Did the reflectors make that big a difference so that you need to change the radius
to adjust the agt?

Can I simply take the reflectors out of your second version, and would it work properly?
 

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Discussion Starter #12
10 gauge copper wire, sounds like it's the best wire for the bowties.

I assume you can use a higher gauge copper wire for the feed line.

With my Mclapp M4 I have trouble with the connections on it , so I think I will
soldier the feed-line to the bowties.

Where do you get your wire for the bow ties, and feed line.

Looking at the expense, I am thinking, recycling scrap yard for the copper wire.

Any ideas?
 

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What is the difference between your antenna model with the reflectors, and model without the reflectors.
I tried to design the antenna, so that it would work well, with or without the reflector. Adding the reflector provided additional gain, in the Hi-VHF and UHF bands, as well as improving the SWR and impedance matching. It does create a more directional antenna, and that may not work for you. I posted the antenna design, with the reflectors, so that you could see it's potential. To see it without the reflector, just remove wire tag 51-59. If you use 4nec2's built in editor, select the Geometry page, and cut lines 42-50.

Looks like you used different radius wires.
Did the reflectors make that big a difference so that you need to change the radius
to adjust the agt?
Removing the reflector does affect the AGT. Adjust the radius of the source wire to 0.0499, is a compromise between the required radius of 0.0409 for Hi-VHF and 0.0589 for UHF. AGT adjustments are only exact for one frequency, but you can pick a value, in the middle of the range, and usually get adequate modeling. It's always a good idea to run your model with the AGT exact at 198Mhz and 540Mhz to confirm the design is working at these frequencies. When you run an AGT test, you get an AGT number, as well as a positive or negative db number following it. This db number it telling you how many decibels gain, your antenna results are off from being correct. You will notice that when you get the AGT number to 1.00, the db number will be 0.0 or close to it. This is telling you that your results, at least at the specified frequency are as accurate as possible.

Are you using 14 AWG wire for the bowties?
I originally used the radius from Holl_ands original file for the Superquad. It looks like it was designed around #8 wire, for the bowties. At some point, I must have simplified the number to 0.0625". Remember, these numbers are for the RADIUS of the element. 0.0625" radius equals diameter of 0.125" or 1/8" diameter. This is closer to #8 guage wire. I've got a bunch of 1/4" copper tubing, so I modeled it using radius 0.125" for the bowties(1/4" tubing), and 0.051" for the feed elements(#10 wire), and it still works well. It should still give pretty good results with #14 wire, for the bowties, but I think you will get better results with #10 wire, and the bowties won't be as apt to get bent, over time. I've used 0.3125" for the radius of the loop, since I'm planning on using 1/2" copper plumbing pipe(actual diameter is 5/8").

Can I simply take the reflectors out of your second version, and would it work properly?
Changes in the diameter, of the different parts of the antenna, does have some effect on the results, but probably no more than 1/2db. Some changes have more affects on the UHF and some have more affect on the Hi-VHF band. I'd see what material you have access to, and adjust the radius's of the wires in your model to these dimensions. Adjust the AGT for 198(midpoint of the Hi-VHF band) and for 540(midpoint of the UHF repack band) and see what results you get. Compare these results to models using other size materials, and you will see if your materials are better of worse. Then you have to decide if you are willing to accept the antenna with your material, or if it's better to find other materials. I wouldn't spend a lot of money or time, trying to gain 1/2db or so.

I noticed that you have been converting your models to numerical numbers, and not using symbols. It is a lot easier to test different materials, if you learn to use symbols. I can change all of the radius's, of all of the bowties by just going to the symbols page, in the editor and changing the number for "Rbow", and I can change the radius of all of the loop elements by changing the number for "Rloop". I can change dimensions of things, like the length of the bowties, by just changing the number for "BowLen". The model is designed so that any other dimensions, that are affected by one change, are automatically changed. Some people seem to understand this system, but I understand that it seems foreign to other people. Once you understand it, it really makes changing your model much easier.

Lawrence
 

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Discussion Starter #14
What size PVC pipe did you use?

And where did you get the copper tubing?


How is your Kosmic SuperQuard, with copper loop reception?

And how is the VHF on it? And how is the UHF on it?
 

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How is your Kosmic SuperQuard, with copper loop reception?
So far, I've not had a chance to build the Superquad. Colorado is starting to loosen travel restrictions, but I haven't had a chance to make a trip to Home Depot. I live in rural Colorado, and our closest Home Depot is 60 miles away.

What size PVC pipe did you use?
I modeled it with 1 1/4" PVC. PVC is just a framework to support the antenna elements, so you could use other sizes, if that's what you have available.

And where did you get the copper tubing?
I've got access to a local plumbers scrap pile, so short pieces of copper come from his pile. Anything I can't find in his scrap has to come from Home depot. I design many of my antennas with 1/2" copper(actually 5/8" in diameter), because that's what is most common in the scrap pile, and is also the cheapest size pipe and fittings at Home depot.
 

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Discussion Starter #16
Local plumbers scrap pile, that's a good idea!

Maybe I can locate one here.

How do you connect the short pieces of copper together?


You mentioned that discontinuities at the corners of the loop increase the VHF gain.

Is 4nec2 giving a error in the VHF gain?

What reduction in the uhf gain, did you get?

I did 4nec on the Kosmic Super Quard (1/4 outer diameter copper) with discontinuities at the corners of the loop.

It gave VHF gain minus the AGT of 6.67 db.
And on UHF minus the AGT, it gives 10.25 to 12.1 db

Sounds pretty good to me, if 4nec2 is giving accurate results on the VHF.

It looked line
 

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Hi Lassar
It's getting harder and harder to get scrap from the plumbers. The cost of copper is making it worth selling the scraps. Being related to the plumber helps. I usually end up getting my longer pieces at Home Depot. My designs rely on standard solder joints. I design the joints to be 45, 90 degree elbows or 'T' joints. Joints are then soldered together. Silver solder is more expensive, but I think it works better. Plumbing flux makes solid joints, but over time, the joint may loose electrical contact. Rosin flux isn't as easy to find, but it makes a joint that has better electrical contact and doesn't corrode over time. As long as you eliminate any error messages, and eliminate as many warnings, you will get pretty accurate results from 4nec2. You have to keep in mind that 4nec2 doesn't always provide perfect results. It seems to be the best software available to the average person, so it's what most amateurs use, to design and test antenna designs. Sometimes you just have to build the antenna and see if it works the way you want.
 

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Discussion Starter #18
Hmm.

Think I might try the 1/4 O.D. copper pipe without quite jointing the corners.

4nec2 says I can get 6.5 db vhf that way. And at most lose about .5 db.

If worst comes to worst, I can use wire to join the corners.
 

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Discussion Starter #20
6 whiskers bowties

Been experimenting with Six-Whisker Tri-Conn Bowtie in 4nec2.

Does not seem to mess with the VHF.

The SWR on VHF is 4.25

And the AGT is on the high side.

The two channels I want to get is channel 12 (channel 11: 201 Mhz) , and channel 6 (channel 19: 503 mhz).

In this Six-Whisker Tri-Conn Bowtie antenna, 503 Mhz comes in about .5db stronger.

It looks like it might be okay for vhf, and uhf.

Check it out and let me know what you think of it.

Is there any way to fix the high AGT.

It's giving me a bunch of warnings: "Warn.: too sharp angle or too short/thick segment(s) for Wires"





Code:
CM Simple SOURCE Wire. Modeled without Autoseg.   Autosegment(15) can be used.
CM Source wire sized to be half way between Hi-VHF and UHF
CM Antenna can be built without reflectors.  Remove wire 42-50(Tag 51-59) and 
CM set Rsrc to 0.0499    AGT=1.0  UHF(540)=0.589   &   HiVHF(198)=0.0409 - No Reflectors
CE
SY w1seg=1, w1x1=0, w1y1=0.754179, w1rad=0.046336
GW	1	w1seg	w1x1	-w1y1	w1x1	w1x1	w1y1	w1x1	w1rad
SY w2seg=5, w2y1=10.93268, w2z1=7.391532, w2z2=5.816288, w2rad=0.064245
GW	4	w2seg	w1x1	w2y1	w2z1	w1x1	w1y1	w2z2	w2rad
SY w3z1=4.241043
GW	5	w2seg	w1x1	w2y1	w3z1	w1x1	w1y1	w2z2	w2rad
GW	6	w2seg	w1x1	-w1y1	w2z2	w1x1	-w2y1	w2z1	w2rad
GW	7	w2seg	w1x1	-w1y1	w2z2	w1x1	-w2y1	w3z1	w2rad
SY w6z1=7.391533
GW	8	w2seg	w1x1	w2y1	-w6z1	w1x1	w1y1	-w2z2	w2rad
GW	9	w2seg	w1x1	w2y1	-w3z1	w1x1	w1y1	-w2z2	w2rad
GW	10	w2seg	w1x1	-w1y1	-w2z2	w1x1	-w2y1	-w6z1	w2rad
GW	11	w2seg	w1x1	-w1y1	-w2z2	w1x1	-w2y1	-w3z1	w2rad
SY w10z1=19.02411, w10z2=17.44886
GW	12	w2seg	w1x1	w2y1	w10z1	w1x1	w1y1	w10z2	w2rad
SY w11z1=15.87362
GW	13	w2seg	w1x1	w2y1	w11z1	w1x1	w1y1	w10z2	w2rad
GW	14	w2seg	w1x1	-w1y1	w10z2	w1x1	-w2y1	w10z1	w2rad
GW	15	w2seg	w1x1	-w1y1	w10z2	w1x1	-w2y1	w11z1	w2rad
GW	16	w2seg	w1x1	w2y1	-w10z1	w1x1	w1y1	-w10z2	w2rad
GW	17	w2seg	w1x1	w2y1	-w11z1	w1x1	w1y1	-w10z2	w2rad
GW	18	w2seg	w1x1	-w1y1	-w10z2	w1x1	-w2y1	-w10z1	w2rad
GW	19	w2seg	w1x1	-w1y1	-w10z2	w1x1	-w2y1	-w11z1	w2rad
SY w18z2=16.54007, w18rad=0.02541
GW	20	w1seg	w1x1	w1y1	w10z2	w1x1	w1y1	w18z2	w18rad
GW	21	w1seg	w1x1	-w1y1	w10z2	w1x1	-w1y1	w18z2	w18rad
SY w20z1=8.057982
GW	22	w1seg	w1x1	w1y1	w20z1	w1x1	w1y1	w2z2	w18rad
GW	23	w1seg	w1x1	-w1y1	w20z1	w1x1	-w1y1	w2z2	w18rad
SY w22seg=3, w22z2=12.29903
GW	24	w22seg	w1x1	-w1y1	w20z1	w1y1	w1x1	w22z2	w18rad
GW	25	w22seg	w1x1	w1y1	w18z2	w1y1	w1x1	w22z2	w18rad
GW	26	w22seg	w1x1	w1y1	w20z1	-w1y1	w1x1	w22z2	w18rad
GW	27	w22seg	w1x1	-w1y1	w18z2	-w1y1	w1x1	w22z2	w18rad
GW	28	w1seg	w1x1	w1y1	-w10z2	w1x1	w1y1	-w18z2	w18rad
GW	29	w1seg	w1x1	-w1y1	-w10z2	w1x1	-w1y1	-w18z2	w18rad
GW	30	w1seg	w1x1	w1y1	-w20z1	w1x1	w1y1	-w2z2	w18rad
GW	31	w1seg	w1x1	-w1y1	-w20z1	w1x1	-w1y1	-w2z2	w18rad
GW	32	w22seg	w1x1	-w1y1	-w20z1	-w1y1	w1x1	-w22z2	w18rad
GW	33	w22seg	w1x1	w1y1	-w18z2	-w1y1	w1x1	-w22z2	w18rad
GW	34	w22seg	w1x1	w1y1	-w20z1	w1y1	w1x1	-w22z2	w18rad
GW	35	w22seg	w1x1	-w1y1	-w18z2	w1y1	w1x1	-w22z2	w18rad
GW	36	w22seg	w1x1	w1y1	w2z2	w1x1	w1y1	w1x1	w18rad
GW	37	w22seg	w1x1	-w1y1	w2z2	w1x1	-w1y1	w1x1	w18rad
GW	38	w22seg	w1x1	w1y1	-w2z2	w1x1	w1y1	w1x1	w18rad
GW	39	w22seg	w1x1	-w1y1	-w2z2	w1x1	-w1y1	w1x1	w18rad
SY w38seg=13, w38y1=11.47796, w38z1=24.35571, w38rad=0.25
GW	40	w38seg	w1x1	-w38y1	w38z1	w1x1	w38y1	w38z1	w38rad
GW	41	w38seg	w1x1	-w38y1	-w38z1	w1x1	w38y1	-w38z1	w38rad
SY w40seg=25
GW	42	w40seg	w1x1	-w38y1	w38z1	w1x1	-w38y1	-w38z1	w38rad
GW	43	w40seg	w1x1	w38y1	w38z1	w1x1	w38y1	-w38z1	w38rad
SY w42y2=10.91288, w42z2=17.45349
GW	44	w2seg	w1x1	w1y1	w10z2	w1x1	w42y2	w42z2	w2rad
SY w43z2=5.820916
GW	45	w2seg	w1x1	w1y1	w2z2	w1x1	w42y2	w43z2	w2rad
SY w44z2=5.81166
GW	46	w2seg	w1x1	w1y1	-w2z2	w1x1	w42y2	-w44z2	w2rad
SY w45z2=17.44423
GW	47	w2seg	w1x1	w1y1	-w10z2	w1x1	w42y2	-w45z2	w2rad
SY w46y1=10.88399, w46z1=17.47093
GW	48	w2seg	w1x1	-w46y1	w46z1	w1x1	-w1y1	w10z2	w2rad
SY w47y1=10.95, w47z1=5.8
GW	49	w2seg	w1x1	-w47y1	w47z1	w1x1	-w1y1	w2z2	w2rad
SY w48y1=10.9
GW	50	w2seg	w1x1	-w48y1	-w47z1	w1x1	-w1y1	-w2z2	w2rad
SY w49y1=10.93342, w49z1=17.46745
GW	51	w2seg	w1x1	-w49y1	-w49z1	w1x1	-w1y1	-w10z2	w2rad
GS	0	0	0.0254		' All in in.
GE	0
EK
SY G1=30000000
LD	5	0	0	0	G1		
EX	0	1	1	0	1	0
GN	-1
SY Freq=174
FR	0	1	0	0	Freq
RP 0 1 73 1510 90 0 1 5 0 0
 
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