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Channel Master 3617 remodel?

6K views 16 replies 6 participants last post by  Sev 
#1 ·
I have the original specifications for the 3617 and was planning on building a clone.

However since some of the bandwidth it was designed to pick up is no longer utilized for TV transmissions.

I was wondering.

Would it be possible to remodel that antenna so that it is optimized for the repack?
 
#4 · (Edited)
Le's try this again. CM3671 "Crossfire" is old Ch2-69 COMBO Antenna, where the smallest elements are for UHF and would be the only ones that MIGHT be changed to improve performance on upcoming Ch14-46 UHF Band:
https://pimages.solidsignal.com/CN3671_zoom.gif

No longer on-line, "cmg2.gif" file provided Gain info for CM3671 [in dBd], ranging from only 9.7 dbi on Ch14 [YUCK!!!] up to 14.7 dBi on Ch52 [after converting to dBi]:
https://photos.imageevent.com/holl_ands/files/hidden//CM367X Crossfire Gain - cmg2.jpg
https://photos.imageevent.com/holl_ands/files/hidden//CM367X Crossfire BW_FB - cmg2a.jpg

IF (say) nikiml's Python Optimization Scripts was used to re-Optimize both Element Lengths (Most Longer) AND ALSO Placement on the Beam, then I would Guesstimate that Gain MIGHT be improved by up to about 0.5 to 1.0 dB, based on my results for higher Gain NU-FF6 vs FF6. And if ONLY the Length was re-Optimized on some/most Elements, the improvement would be significantly Less:
https://imageevent.com/holl_ands/multibay/uhf6baybowtievdar
https://imageevent.com/holl_ands/multibay/newuhffreeform6bayvdaropt

Note that CM3671 has about a 5 dB lower Gain on Ch14 than Gain on the Higher Channels....which is very typical for Wide-Band Yagi Antennas [incl 91XG]. I doubt that a re-Optimized UHF section would improve on this very much, anticipating that Ch14 MIGHT be 4 dB lower Gain than on Ch36. Compare this to the Frequency response of my NU-FF6 which shows only 2.6 dB lower Gain on Ch14 than Ch36. [Will post "soonish": NU-FF4 shows only 1.0 dB lower Gain.]

So there is only minimal improvement possible in CM3671.....IF the re-Optimization were Accurate....which I DOUBT would be the case using Low-Rez NEC2 Engine, which I predict would have problems with those three much longer "arrow" type Directors [primarily for Hi-VHF, but can NOT be ignored for UHF].....the NEC2 Engine likes all of the Element lengths to be in the SAME frequency band. [Which is one reason why Ken Nist and I usually use somewhat different 4nec models in Hi-VHF and UHF Bands.] So, NO, I am NOT interested in attempting this WHAT-IF exercise.....

If you think that you need higher UHF Gain, I would suggest adding a higher Gain UHF Antenna [perhaps re-Optimized for the New UHF Band] and continue using CM3671 for Ch2-13:
 
#5 ·
Thanks Hollands for the input on the 3671.
It Appears largest improvement in gain to that antenna is when the UHF and VHF ends are separated and individual baluns are installed.
If that information is accurate.
I have been planning on doing the same mod on an 8200U I have.


http://hdtvprimer.com/antennas/CM3671mod.gif


I however got my wires crossed on the 3617B Crossfire. It was actually the antenna I was talking about. Just had a brain fart about it being VHF.
What I did get correct is the fact that I have the full specifications for the 3617 from Channel Master.
Let me know if you would like to have them for modeling purposes.
I would be interested in see the antenna's performance is for DX'ing purposes.

I am still searching for the specifications of the quantum 1110 as well.
I believe is was Stampeder, 300 ohm and another gentleman that had very good success in improving gain on that antenna by extending the nose by 2-4 elements and adding floating directors to every set of elements except the rear most.
 
#6 ·
Due to anticipated modeling problems using NEC2 Engine, I have no interest in knowing dimensions of CM-3617B....

But I remain interested in modeling Winegard Hi-VHF/UHF Combo Antennas [HD7694, HD7697, HD7698, HD8200] if someone were to provide detailed dimensions....and photos with ruler shown in the photo....
 
#10 ·
I will see what I can do on the 8200U for you Hol_lands.

I switched it out with my VHF Archer and a HDB91x. It is just laying on the backside of the roof at the movement.

Also just recently picked up a Quantum 1112 in pretty good shape. Only 1 bad element that would have been fine if the previous owners didnt trip over it after taking it down.
You dont happen to know if the main body of the 1111 and 1112 are the same length per chance?
 
#8 ·
I got lucky not too long ago when I came across a never used CM-3617, still new in the an unopened box! I got it from a local guy on Kijiji that was cleaning out his garage and found it in the back.. it had a date on it of 1998. Best thing was I paid only $100 for it !!!

I did the Hepburn mods to it, separating the VHF and the UHF and placing a 19dB amp only on the UHF feed at the antenna as seen here: Antenna Project
As William reported " Awesome results. UHF gain much better. VHF improved too, lower noise floor "

And here is my install: http://ads-b.ca/ADS-B_CM3671/

I've had some great DX results with low VHF skip.
First was KNOP RF channel 2 Nebraska at 1742 Km.
That was soon outdone by KHME RF channel 2 Rapid City, South Dakota a new record for me of 1885 Km !

As for Buffalo I can now pick up some of the low power guys too like WBBZ RF7 and WBXZ RF 17.
 
#16 ·
Take a closer look, it is being used. There is a vertical antenna mounted on top of that mast... it's a 1090 MHz 5 element co-linear ADS-B Flight Radar antenna.

Originally I had it side mounted to the tower but it always had reduced range the direction of the towers shadow. I always wanted it at the top and that was part of my plan when the 3671 went up. I also replaced the AR-40 rotor that had been up there for over 10 years. Water had got into it and the barrings were shot. The new rotor is a classic Channel Master made in 1975. I got it unused and still in a sealed box on eBay for only $100. It worked right out of the box but I did re-grease the motor as the original grease was very dry. The old classic CM rotors worked really well... they were designed to last... not like the cheap Chinese unit they now sell.


Radar antenna at top.



Radar Terminal Display with new Antenna. Range over 650 Km !
 
#12 · (Edited)
Analyze ofCM-3617B Antenna VHF low-band (54-88 MHz) VHF high-band (174-216 MHz)
reference of document CA781010A.pdf
Capacitor 2.7pF (optional min=1.5pF max=4pF)
MMANA-GAL basic --> Loads 2.7pF in C/jX/BO = 0.27
4nec2--Loads 2.5pF and --> C(Farad)=2.5e-12
Capacitor optional min=1.2pF max=4pF)
This image shows the antenna geometry.

graphic VHF low-band (54-88 MHz)

graphic VHF high-band (174-193 MHz)

graphic VHF high-band (199-216 MHz)


Modeling Results in 4nec2

This is the file with all the documentation of the antenna in .pdf
 

Attachments

#13 · (Edited)
Sample nec file to optimize cm3617 antenna with nikiml's Python scripts.
4nec2 File:
Code:
CM Antenna CM3617B
CM 3/8" element diameter round tubing
CM 1/8" Harness wire
CM Capacitor 2.7pF (optional min=1.2pF max=4pF)
CMD--OPT -s(57,6,3) -t(6.75,7.95,7.75) --swr-target=2 -s(79,6,6) -t(9.15,8.55,8.75,9.75,10.35,9.5) --swr-target=2 -s(177,6,7) -t(12.75,13.35,13.95,14.45,14.75,14.95,14.35) --swr-target=2
CMD--OPT -F .5*max_gain_diff+.5*ave_gain_diff
CMD--OPT --de-np=50 -r restart.log
CMD--OPT --auto-segmentation=36 --char-impedance=300 --num-cores=4
CMD--EVAL --auto-segmentation=36 --char-impedance=300 --num-cores=4
CMD--EVAL -s(57,6,3) -s(79,6,6) -s(177,6,7)
CE
SY Rsrc=0.216    '0.107, 0.265
SY radHa=0.0625
SY radDr=0.125
SY LowY0=1.75    '1.375, 2
SY LowY1=54.9    '51.48, 55
SY LowY2=48.6    '46.8, 50
SY LowY3=46.3    '43.524, 46.5
SY LowY4=42.2    '40.131, 42.875
SY LowY5=38.5    '36.738, 39.25
SY LowY6=35.53    '33.228, 36.125
SY LowY7=32.18    '30.186, 32.75
SY LowY8=29.38    '28.314, 30.25
SY LowY9=26.53    '24.336, 26.6
SY HighY1=17.125    '15.21, 17.25
SY HighY2=15.7125    '14.742, 15.75
SY HighY3=14.83    '13.806, 15.3125
SY HighY4=14.372    '13.338, 14.75
SY HighY5=14.18    '12.87, 14.25
SY HighY6=13.27    '12.402, 13.75
SY HighY7=12.8125    '12.168, 13.0625
SY HighY8=12.314    '11.934, 12.75
SY HighY9=11.96    '11.466, 12.25
SY HighZ0=0.5    '0.5, 0.7125
SY DirY1=0.875    '0.6875, 1.875
SY DirY2=25.74    '25.74, 28.75
SY DirY3=29.016    '29.016, 33.5625
SY DirZ1=0.625
SY Angle=28    '21, 30.625
SY Angle1=90-Angle
SY AngleDir=Angle1
SY DirLeg=18.625 '17.784, 19
SY Y1dr=DirY2
SY Y2dr=Y1dr-(DirLeg*sin(AngleDir))
SY Z1dr=DirZ1
SY Z2dr=Z1dr+(DirLeg*sin(Angle))
SY HY=0.28125
SY HarY1=LowY0-HY
SY HarZ2a=1.58    '1.5, 2.75
SY HS=0.5
SY HarZ1=HarZ2a+(HS/2)
SY HarZ2b=HarZ2a+HS
SY CpF=2.5E-12
GW    1    23    0    LowY0    0    0    LowY1    0    0.1875
GW    2    23    0    -LowY0    0    0    -LowY1    0    0.1875
GW    4    21    12    LowY0    0    12    LowY2    0    0.1875
GW    5    21    12    -LowY0    0    12    -LowY2    0    0.1875
GW    7    19    24    LowY0    0    24    LowY3    0    0.1875
GW    8    19    24    -LowY0    0    24    -LowY3    0    0.1875
GW    10    17    36    LowY0    0    36    LowY4    0    0.1875
GW    11    17    36    -LowY0    0    36    -LowY4    0    0.1875
GW    13    15    48    LowY0    0    48    LowY5    0    0.1875
GW    14    15    48    -LowY0    0    48    -LowY5    0    0.1875
GW    16    15    60    LowY0    0    60    LowY6    0    0.1875
GW    17    15    60    -LowY0    0    60    -LowY6    0    0.1875
GW    19    13    72    LowY0    0    72    LowY7    0    0.1875
GW    20    13    72    -LowY0    0    72    -LowY7    0    0.1875
GW    22    11    84    LowY0    0    84    LowY8    0    0.1875
GW    23    11    84    -LowY0    0    84    -LowY8    0    0.1875
GW    25    11    96    LowY0    0    96    LowY9    0    0.1875
GW    26    11    96    -LowY0    0    96    -LowY9    0    0.1875
GW    3    15    4    -HighY1    HighZ0    4    HighY1    HighZ0    0.1875
GW    6    13    16    -HighY2    HighZ0    16    HighY2    HighZ0    0.1875
GW    9    13    28    -HighY3    HighZ0    28    HighY3    HighZ0    0.1875
GW    12    13    39.5    -HighY4    HighZ0    39.5    HighY4    HighZ0    0.1875
GW    15    13    51.5    -HighY5    HighZ0    51.5    HighY5    HighZ0    0.1875
GW    18    11    63.5    -HighY6    HighZ0    63.5    HighY6    HighZ0    0.1875
GW    21    11    75    -HighY7    HighZ0    75    HighY7    HighZ0    0.1875
GW    24    11    87    -HighY8    HighZ0    87    HighY8    HighZ0    0.1875
GW    27    5    99    0    HighZ0    99    HighY9    HighZ0    0.1875
GW    28    5    99    0    HighZ0    99    -HighY9    HighZ0    0.1875
GW    29    3    96    -LowY0    0    96    LowY0    0    Rsrc
GW    30    1    0    LowY0    0    0    LowY0    -0.875    radHa
GW    32    1    0    LowY0    -0.875    0.96181102    HarY1    -HarZ1    radHa
GW    33    2    0.96181102    HarY1    -HarZ1    6    0    -HarZ2a    radHa
GW    34    2    6    0    -HarZ2a    11.038189    -HarY1    -HarZ1    radHa
GW    35    1    11.038189    -HarY1    -HarZ1    12    -LowY0    -0.875    radHa
GW    37    1    12    -LowY0    -0.875    12    -LowY0    0    radHa
GW    38    1    0    -LowY0    0    0    -LowY0    -0.875    radHa
GW    40    1    0    -LowY0    -0.875    0.96181102    -HarY1    -HarZ1    radHa
GW    41    2    0.96181102    -HarY1    -HarZ1    6    0    -HarZ2b    radHa
GW    42    2    6    0    -HarZ2b    11.038189    HarY1    -HarZ1    radHa
GW    43    1    11.038189    HarY1    -HarZ1    12    LowY0    -0.875    radHa
GW    45    1    12    LowY0    -0.875    12    LowY0    0    radHa
GW    47    1    12    LowY0    -0.875    12.961811    HarY1    -HarZ1    radHa
GW    48    2    12.961811    HarY1    -HarZ1    18    0    -HarZ2a    radHa
GW    49    2    18    0    -HarZ2a    23.038189    -HarY1    -HarZ1    radHa
GW    50    1    23.038189    -HarY1    -HarZ1    24    -LowY0    -0.875    radHa
GW    52    1    24    -LowY0    -0.875    24    -LowY0    0    radHa
GW    54    1    12    -LowY0    -0.875    12.961811    -HarY1    -HarZ1    radHa
GW    55    2    12.961811    -HarY1    -HarZ1    18    0    -HarZ2b    radHa
GW    56    2    18    0    -HarZ2b    23.038189    HarY1    -HarZ1    radHa
GW    57    1    23.038189    HarY1    -HarZ1    24    LowY0    -0.875    radHa
GW    59    1    24    LowY0    -0.875    24    LowY0    0    radHa
GW    61    1    24    LowY0    -0.875    24.961811    HarY1    -HarZ1    radHa
GW    62    2    24.961811    HarY1    -HarZ1    30    0    -HarZ2a    radHa
GW    63    2    30    0    -HarZ2a    35.038189    -HarY1    -HarZ1    radHa
GW    64    1    35.038189    -HarY1    -HarZ1    36    -LowY0    -0.875    radHa
GW    66    1    36    -LowY0    -0.875    36    -LowY0    0    radHa
GW    68    1    24    -LowY0    -0.875    24.961811    -HarY1    -HarZ1    radHa
GW    69    2    24.961811    -HarY1    -HarZ1    30    0    -HarZ2b    radHa
GW    70    2    30    0    -HarZ2b    35.038189    HarY1    -HarZ1    radHa
GW    71    1    35.038189    HarY1    -HarZ1    36    LowY0    -0.875    radHa
GW    73    1    36    LowY0    -0.875    36    LowY0    0    radHa
GW    75    1    36    LowY0    -0.875    36.961811    HarY1    -HarZ1    radHa
GW    76    2    36.961811    HarY1    -HarZ1    42    0    -HarZ2a    radHa
GW    77    2    42    0    -HarZ2a    47.038189    -HarY1    -HarZ1    radHa
GW    78    1    47.038189    -HarY1    -HarZ1    48    -LowY0    -0.875    radHa
GW    80    1    48    -LowY0    -0.875    48    -LowY0    0    radHa
GW    82    1    36    -LowY0    -0.875    36.961811    -HarY1    -HarZ1    radHa
GW    83    2    36.961811    -HarY1    -HarZ1    42    0    -HarZ2b    radHa
GW    84    2    42    0    -HarZ2b    47.038189    HarY1    -HarZ1    radHa
GW    85    1    47.038189    HarY1    -HarZ1    48    LowY0    -0.875    radHa
GW    87    1    48    LowY0    -0.875    48    LowY0    0    radHa
GW    89    1    48    LowY0    -0.875    48.961811    HarY1    -HarZ1    radHa
GW    90    2    48.961811    HarY1    -HarZ1    54    0    -HarZ2a    radHa
GW    91    2    54    0    -HarZ2a    59.038189    -HarY1    -HarZ1    radHa
GW    92    1    59.038189    -HarY1    -HarZ1    60    -LowY0    -0.875    radHa
GW    94    1    60    -LowY0    -0.875    60    -LowY0    0    radHa
GW    96    1    48    -LowY0    -0.875    48.961811    -HarY1    -HarZ1    radHa
GW    97    2    48.961811    -HarY1    -HarZ1    54    0    -HarZ2b    radHa
GW    98    2    54    0    -HarZ2b    59.038189    HarY1    -HarZ1    radHa
GW    99    1    59.038189    HarY1    -HarZ1    60    LowY0    -0.875    radHa
GW    101    1    60    LowY0    -0.875    60    LowY0    0    radHa
GW    103    1    60    LowY0    -0.875    60.961811    HarY1    -HarZ1    radHa
GW    104    2    60.961811    HarY1    -HarZ1    66    0    -HarZ2a    radHa
GW    105    2    66    0    -HarZ2a    71.038189    -HarY1    -HarZ1    radHa
GW    106    1    71.038189    -HarY1    -HarZ1    72    -LowY0    -0.875    radHa
GW    108    1    72    -LowY0    -0.875    72    -LowY0    0    radHa
GW    110    1    60    -LowY0    -0.875    60.961811    -HarY1    -HarZ1    radHa
GW    111    2    60.961811    -HarY1    -HarZ1    66    0    -HarZ2b    radHa
GW    112    2    66    0    -HarZ2b    71.038189    HarY1    -HarZ1    radHa
GW    113    1    71.038189    HarY1    -HarZ1    72    LowY0    -0.875    radHa
GW    115    1    72    LowY0    -0.875    72    LowY0    0    radHa
GW    117    1    72    LowY0    -0.875    72.961811    HarY1    -HarZ1    radHa
GW    118    2    72.961811    HarY1    -HarZ1    78    0    -HarZ2a    radHa
GW    119    2    78    0    -HarZ2a    83.038189    -HarY1    -HarZ1    radHa
GW    120    1    83.038189    -HarY1    -HarZ1    84    -LowY0    -0.875    radHa
GW    122    1    84    -LowY0    -0.875    84    -LowY0    0    radHa
GW    124    1    72    -LowY0    -0.875    72.961811    -HarY1    -HarZ1    radHa
GW    125    2    72.961811    -HarY1    -HarZ1    78    0    -HarZ2b    radHa
GW    126    2    78    0    -HarZ2b    83.038189    HarY1    -HarZ1    radHa
GW    127    1    83.038189    HarY1    -HarZ1    84    LowY0    -0.875    radHa
GW    129    1    84    LowY0    -0.875    84    LowY0    0    radHa
GW    131    1    84    LowY0    -0.875    84.961811    HarY1    -HarZ1    radHa
GW    132    2    84.961811    HarY1    -HarZ1    90    0    -HarZ2a    radHa
GW    133    2    90    0    -HarZ2a    95.038189    -HarY1    -HarZ1    radHa
GW    134    1    95.038189    -HarY1    -HarZ1    96    -LowY0    -0.875    radHa
GW    136    1    96    -LowY0    -0.875    96    -LowY0    0    radHa
GW    138    1    84    -LowY0    -0.875    84.961811    -HarY1    -HarZ1    radHa
GW    139    2    84.961811    -HarY1    -HarZ1    90    0    -HarZ2b    radHa
GW    140    2    90    0    -HarZ2b    95.038189    HarY1    -HarZ1    radHa
GW    141    1    95.038189    HarY1    -HarZ1    96    LowY0    -0.875    radHa
GW    143    1    96    LowY0    -0.875    96    LowY0    0    radHa
GW    144    11    108    DirY1    0    108    DirY2    0    0.1875
GW    145    1    108    DirY2    0    108    DirY3    0    0.1875
GW    146    11    108    -DirY1    0    108    -DirY2    0    0.1875
GW    147    1    108    -DirY2    0    108    -DirY3    0    0.1875
GW    148    1    108    DirY2    0    108    DirY2    DirZ1    0.0748
GW    148    8    108    DirY2    DirZ1    108    Y2dr    Z2dr    0.1875
GW    150    1    108    DirY2    0    108    DirY2    -DirZ1    0.0748
GW    151    8    108    DirY2    -DirZ1    108    Y2dr    -Z2dr    0.1875
GW    152    1    108    -DirY2    0    108    -DirY2    DirZ1    0.0748
GW    153    8    108    -DirY2    DirZ1    108    -Y2dr    Z2dr    0.1875
GW    154    1    108    -DirY2    0    108    -DirY2    -DirZ1    0.0748
GW    155    8    108    -DirY2    -DirZ1    108    -Y2dr    -Z2dr    0.1875
GW    156    11    120    DirY1    0    120    DirY2    0    0.1875
GW    157    1    120    DirY2    0    120    DirY3    0    0.1875
GW    158    11    120    -DirY1    0    120    -DirY2    0    0.1875
GW    159    1    120    -DirY2    0    120    -DirY3    0    0.1875
GW    160    1    120    DirY2    0    120    DirY2    DirZ1    0.0748
GW    161    8    120    DirY2    DirZ1    120    Y2dr    Z2dr    0.1875
GW    162    1    120    DirY2    0    120    DirY2    -DirZ1    0.0748
GW    163    8    120    DirY2    -DirZ1    120    Y2dr    -Z2dr    0.1875
GW    164    1    120    -DirY2    0    120    -DirY2    DirZ1    0.0748
GW    165    8    120    -DirY2    DirZ1    120    -Y2dr    Z2dr    0.1875
GW    166    1    120    -DirY2    0    120    -DirY2    -DirZ1    0.0748
GW    167    8    120    -DirY2    -DirZ1    120    -Y2dr    -Z2dr    0.1875
GW    168    11    132    DirY1    0    132    DirY2    0    0.1875
GW    169    1    132    DirY2    0    132    DirY3    0    0.1875
GW    170    11    132    -DirY1    0    132    -DirY2    0    0.1875
GW    171    1    132    -DirY2    0    132    -DirY3    0    0.1875
GW    172    1    132    DirY2    0    132    DirY2    DirZ1    0.0748
GW    173    8    132    DirY2    DirZ1    132    Y2dr    Z2dr    0.1875
GW    174    1    132    DirY2    0    132    DirY2    -DirZ1    0.0748
GW    175    8    132    DirY2    -DirZ1    132    Y2dr    -Z2dr    0.1875
GW    176    1    132    -DirY2    0    132    -DirY2    DirZ1    0.0748
GW    177    8    132    -DirY2    DirZ1    132    -Y2dr    Z2dr    0.1875
GW    178    1    132    -DirY2    0    132    -DirY2    -DirZ1    0.0748
GW    179    8    132    -DirY2    -DirZ1    132    -Y2dr    -Z2dr    0.1875
GW    180    11    144    DirY1    0    144    DirY2    0    0.1875
GW    181    1    144    DirY2    0    144    DirY3    0    0.1875
GW    182    11    144    -DirY1    0    144    -DirY2    0    0.1875
GW    183    1    144    -DirY2    0    144    -DirY3    0    0.1875
GW    184    1    144    DirY2    0    144    DirY2    DirZ1    0.0748
GW    185    8    144    DirY2    DirZ1    144    Y2dr    Z2dr    0.1875
GW    186    1    144    DirY2    0    144    DirY2    -DirZ1    0.0748
GW    187    8    144    DirY2    -DirZ1    144    Y2dr    -Z2dr    0.1875
GW    188    1    144    -DirY2    0    144    -DirY2    DirZ1    0.0748
GW    189    8    144    -DirY2    DirZ1    144    -Y2dr    Z2dr    0.1875
GW    190    1    144    -DirY2    0    144    -DirY2    -DirZ1    0.0748
GW    191    8    144    -DirY2    -DirZ1    144    -Y2dr    -Z2dr    0.1875
GW    192    11    156    DirY1    0    156    DirY2    0    0.1875
GW    193    1    156    DirY2    0    156    DirY3    0    0.1875
GW    194    11    156    -DirY1    0    156    -DirY2    0    0.1875
GW    195    1    156    -DirY2    0    156    -DirY3    0    0.1875
GW    196    1    156    DirY2    0    156    DirY2    DirZ1    0.0748
GW    197    8    156    DirY2    DirZ1    156    Y2dr    Z2dr    0.1875
GW    198    1    156    DirY2    0    156    DirY2    -DirZ1    0.0748
GW    199    8    156    DirY2    -DirZ1    156    Y2dr    -Z2dr    0.1875
GW    200    1    156    -DirY2    0    156    -DirY2    DirZ1    0.0748
GW    201    8    156    -DirY2    DirZ1    156    -Y2dr    Z2dr    0.1875
GW    202    1    156    -DirY2    0    156    -DirY2    -DirZ1    0.0748
GW    203    8    156    -DirY2    -DirZ1    156    -Y2dr    -Z2dr    0.1875
GW    204    11    168    DirY1    0    168    DirY2    0    0.1875
GW    205    1    168    DirY2    0    168    DirY3    0    0.1875
GW    206    11    168    -DirY1    0    168    -DirY2    0    0.1875
GW    207    1    168    -DirY2    0    168    -DirY3    0    0.1875
GW    208    1    168    DirY2    0    168    DirY2    DirZ1    0.0748
GW    209    8    168    DirY2    DirZ1    168    Y2dr    Z2dr    0.1875
GW    210    1    168    DirY2    0    168    DirY2    -DirZ1    0.0748
GW    211    8    168    DirY2    -DirZ1    168    Y2dr    -Z2dr    0.1875
GW    212    1    168    -DirY2    0    168    -DirY2    DirZ1    0.0748
GW    213    8    168    -DirY2    DirZ1    168    -Y2dr    Z2dr    0.1875
GW    214    1    168    -DirY2    0    168    -DirY2    -DirZ1    0.0748
GW    215    8    168    -DirY2    -DirZ1    168    -Y2dr    -Z2dr    0.1875
GW    216    11    180    DirY1    0    180    DirY2    0    0.1875
GW    217    1    180    DirY2    0    180    DirY3    0    0.1875
GW    218    11    180    -DirY1    0    180    -DirY2    0    0.1875
GW    219    1    180    -DirY2    0    180    -DirY3    0    0.1875
GW    220    1    180    DirY2    0    180    DirY2    DirZ1    0.0748
GW    221    8    180    DirY2    DirZ1    180    Y2dr    Z2dr    0.1875
GW    222    1    180    DirY2    0    180    DirY2    -DirZ1    0.0748
GW    223    8    180    DirY2    -DirZ1    180    Y2dr    -Z2dr    0.1875
GW    224    1    180    -DirY2    0    180    -DirY2    DirZ1    0.0748
GW    225    8    180    -DirY2    DirZ1    180    -Y2dr    Z2dr    0.1875
GW    226    1    180    -DirY2    0    180    -DirY2    -DirZ1    0.0748
GW    227    8    180    -DirY2    -DirZ1    180    -Y2dr    -Z2dr    0.1875
GW    228    11    192    DirY1    0    192    DirY2    0    0.1875
GW    229    1    192    DirY2    0    192    DirY3    0    0.1875
GW    230    11    192    -DirY1    0    192    -DirY2    0    0.1875
GW    231    1    192    -DirY2    0    192    -DirY3    0    0.1875
GW    232    1    192    DirY2    0    192    DirY2    DirZ1    0.0748
GW    233    8    192    DirY2    DirZ1    192    Y2dr    Z2dr    0.1875
GW    234    1    192    DirY2    0    192    DirY2    -DirZ1    0.0748
GW    235    8    192    DirY2    -DirZ1    192    Y2dr    -Z2dr    0.1875
GW    236    1    192    -DirY2    0    192    -DirY2    DirZ1    0.0748
GW    237    8    192    -DirY2    DirZ1    192    -Y2dr    Z2dr    0.1875
GW    238    1    192    -DirY2    0    192    -DirY2    -DirZ1    0.0748
GW    239    8    192    -DirY2    -DirZ1    192    -Y2dr    -Z2dr    0.1875
GW    240    3    108    -DirY1    0    108    DirY1    0    radDr
GW    241    3    120    -DirY1    0    120    DirY1    0    radDr
GW    242    3    132    -DirY1    0    132    DirY1    0    radDr
GW    243    3    144    -DirY1    0    144    DirY1    0    radDr
GW    244    3    156    -DirY1    0    156    DirY1    0    radDr
GW    245    3    168    -DirY1    0    168    DirY1    0    radDr
GW    246    3    180    -DirY1    0    180    DirY1    0    radDr
GW    247    3    192    -DirY1    0    192    DirY1    0    radDr
GS    0    0    0.0254
GE    0
LD    1    240    1    3    0    0    CpF
LD    1    241    1    3    0    0    CpF
LD    1    242    1    3    0    0    CpF
LD    1    243    1    3    0    0    CpF
LD    1    244    1    3    0    0    CpF
LD    1    245    1    3    0    0    CpF
LD    1    246    1    3    0    0    CpF
LD    1    247    1    3    0    0    CpF
GN    -1
EK
EX    0    29    2    0    1    0    0
FR    0    0    0    0    195    0
EN
Eval Results:
Code:
Input file : cm3617_opt.nec
Freq sweeps: [(57, 6, 3), (79, 6, 6), (177, 6, 7)]
Autosegmentation: 36 per 0.769231

         --- Gain ---              -- Ratios -- -- Impedance --
   Freq    Raw    Net   SWR BeamW    F/R    F/B    Real    Imag  AGT  corr
==========================================================================
   57.0   8.19   7.88  1.71  63.0  18.99  18.99  198.69  -85.17 0.95 -0.22
   63.0   8.75   8.58  1.49  61.1  26.29  29.73  210.33  -45.94 0.95 -0.22
   69.0   8.67   8.01  2.21  63.7  23.55  30.26  137.75  -30.00 0.95 -0.22
   79.0   9.40   8.98  1.87  57.4  28.03  28.03  182.36  -91.32 1.01  0.02
   85.0   9.59   8.49  2.78  56.9  26.53  30.20  113.48  -64.24 1.01  0.02
   91.0  10.01   8.28  3.68  54.7  25.93  30.49   84.47  -54.89 1.01  0.02
   97.0  10.80   7.49  6.41  50.2  17.59  17.59   46.87  -13.21 1.01  0.02
  103.0  10.95   9.18  3.74  43.1  14.79  14.79   80.36   -8.52 1.01  0.02
  109.0   6.46  -1.66 23.87  69.8  10.02  10.66   12.86   46.08 1.01  0.02
  177.0  12.15  12.02  1.41  25.1  24.00  24.00  336.14 -103.58 0.97 -0.14
  183.0  13.98  13.84  1.44  28.6  26.39  26.39  238.71  -76.16 0.97 -0.14
  189.0  14.15  14.03  1.39  31.2  26.63  26.63  220.90  -31.25 0.97 -0.14
  195.0  14.00  13.95  1.25  30.8  26.35  27.38  246.34  -30.15 0.98 -0.10
  201.0  14.13  13.91  1.57  29.6  23.83  23.83  214.32  -77.82 0.98 -0.10
  207.0  14.12  13.61  2.00  28.2  21.47  21.47  153.60  -38.99 0.98 -0.10
  213.0  13.80  13.62  1.51  27.2  19.35  19.35  198.74    7.75 0.98 -0.10
 
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