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Discussion Starter #1 (Edited by Moderator)
Made with a lot of cutting and pasting from wildwilly and 300ohm for vhf low and high, fm and uhf. Don't know how to check if its any good so any comments are welcome. Nec below, hope this works,both the antenna and the post.

Code:
CM 
CE
GW    1    15    0    1.73228346    -31    0    6.73228346    -26    0.05094856
GW    2    15    0    1.73228346    -21    0    6.73228346    -26    0.05094856
GW    3    15    0    1.73228346    -21    0    6.73228346    -16    0.05094856
GW    4    15    0    1.73228346    -31    0    6.73228346    -36    0.05094856
GW    5    15    0    1.73228346    -41    0    6.73228346    -36    0.05094856
GW    6    15    0    1.73228346    -41    0    6.73228346    -46    0.05094856
GW    7    13    0    6.73228346    -46    0    12.3228346    -46    0.05094856
GW    8    13    0    6.73228346    -16    0    12.3228346    -16    0.05094856
GW    9    15    0    -1.73228346    -31    0    -6.73228346    -26    0.05094856
GW    10    15    0    -1.73228346    -21    0    -6.73228346    -26    0.05094856
GW    11    15    0    -1.73228346    -21    0    -6.73228346    -16    0.05094856
GW    12    15    0    -1.73228346    -31    0    -6.73228346    -36    0.05094856
GW    13    15    0    -1.73228346    -41    0    -6.73228346    -36    0.05094856
GW    14    15    0    -1.73228346    -41    0    -6.73228346    -46    0.05094856
GW    15    13    0    -6.73228346    -46    0    -12.3228346    -46    0.05094856
GW    16    13    0    -6.73228346    -16    0    -12.3228346    -16    0.05094856
GW    17    15    0    1.73228346    31    0    6.73228346    26    0.05094856
GW    18    15    0    1.73228346    21    0    6.73228346    26    0.05094856
GW    19    15    0    1.73228346    21    0    6.73228346    16    0.05094856
GW    20    15    0    1.73228346    31    0    6.73228346    36    0.05094856
GW    21    15    0    1.73228346    41    0    6.73228346    36    0.05094856
GW    22    15    0    1.73228346    41    0    6.73228346    46    0.05094856
GW    23    13    0    6.73228346    46    0    12.3228346    46    0.05094856
GW    24    13    0    6.73228346    16    0    12.3228346    16    0.05094856
GW    25    15    0    -1.73228346    31    0    -6.73228346    26    0.05094856
GW    26    15    0    -1.73228346    21    0    -6.73228346    26    0.05094856
GW    27    15    0    -1.73228346    21    0    -6.73228346    16    0.05094856
GW    28    15    0    -1.73228346    31    0    -6.73228346    36    0.05094856
GW    29    15    0    -1.73228346    41    0    -6.73228346    36    0.05094856
GW    30    15    0    -1.73228346    41    0    -6.73228346    46    0.05094856
GW    31    13    0    -6.73228346    46    0    -12.3228346    46    0.05094856
GW    32    13    0    -6.73228346    16    0    -12.3228346    16    0.05094856
GW    79    25    -4.1338583    -0.3937008    -16    -4.1338583    -12.440945    -16    0.1875
GW    80    25    -4.1338583    0.39370079    -16    -4.1338583    12.4409449    -16    0.1875
GW    81    25    -4.1338583    0.39370079    -46    -4.1338583    12.4409449    -46    0.1875
GW    82    25    -4.1338583    -0.3937008    -46    -4.1338583    -12.440945    -46    0.1875
GW    84    25    -4.1338583    0.39370079    -28.5    -4.1338583    12.007874    -28.5    0.1875
GW    85    25    -4.1338583    -0.3937008    -28.5    -4.1338583    -12.007874    -28.5    0.1875
GW    86    25    -4.1338583    0.39370079    -23.5    -4.1338583    12.4409449    -23.5    0.1875
GW    87    25    -4.1338583    -0.3937008    -23.5    -4.1338583    -12.440945    -23.5    0.1875
GW    88    25    -4.1338583    0.39370079    -33.5    -4.1338583    12.007874    -33.5    0.1875
GW    89    25    -4.1338583    -0.3937008    -33.5    -4.1338583    -12.007874    -33.5    0.1875
GW    90    25    -4.1338583    0.39370079    -38.5    -4.1338583    12.4409449    -38.5    0.1875
GW    91    25    -4.1338583    -0.3937008    -38.5    -4.1338583    -12.440945    -38.5    0.1875
GW    79    25    -4.1338583    -0.3937008    16    -4.1338583    -12.440945    16    0.1875
GW    80    25    -4.1338583    0.39370079    16    -4.1338583    12.4409449    16    0.1875
GW    81    25    -4.1338583    0.39370079    46    -4.1338583    12.4409449    46    0.1875
GW    82    25    -4.1338583    -0.3937008    46    -4.1338583    -12.440945    46    0.1875
GW    84    25    -4.1338583    0.39370079    28.5    -4.1338583    12.007874    28.5    0.1875
GW    85    25    -4.1338583    -0.3937008    28.5    -4.1338583    -12.007874    28.5    0.1875
GW    86    25    -4.1338583    0.39370079    23.5    -4.1338583    12.4409449    23.5    0.1875
GW    87    25    -4.1338583    -0.3937008    23.5    -4.1338583    -12.440945    23.5    0.1875
GW    88    25    -4.1338583    0.39370079    33.5    -4.1338583    12.007874    33.5    0.1875
GW    89    25    -4.1338583    -0.3937008    33.5    -4.1338583    -12.007874    33.5    0.1875
GW    90    25    -4.1338583    0.39370079    38.5    -4.1338583    12.4409449    38.5    0.1875
GW    91    25    -4.1338583    -0.3937008    38.5    -4.1338583    -12.440945    38.5    0.1875
GW    10    11    0    -15.75    46.5    0    -15.75    31    0.05094856
GW    11    11    0    -15.75    31    0    -15.75    15.5    0.05094856
GW    37    1    0    -15.75    31    0    -17.25    31    0.05094856
GW    217    11    0    -17.25    46.5    0    -17.25    31    0.05094856
GW    218    11    0    -17.25    31    0    -17.25    15.5    0.05094856
GW    219    23    0    -48.25    46.5    0    -17.25    46.5    0.05094856
GW    220    23    0    -48.25    15.5    0    -17.25    15.5    0.05094856
GW    239    11    0    15.75    15.5    0    15.75    31    0.05094856
GW    240    11    0    15.75    31    0    15.75    46.5    0.05094856
GW    252    1    0    15.75    31    0    17.25    31    0.05094856
GW    254    11    0    17.25    15.5    0    17.25    31    0.05094856
GW    255    11    0    17.25    31    0    17.25    46.5    0.05094856
GW    256    23    0    48.25    15.5    0    17.25    15.5    0.05094856
GW    257    23    0    48.25    46.5    0    17.25    46.5    0.05094856
GW    1    11    0    .5    46.5    0    15.75    46.5    0.05094856
GW    2    11    0    -15.75    46.5    0    -.5    46.5    0.05094856
GW    3    11    0    .5    15.5    0    15.75    15.5    0.05094856
GW    4    11    0    -15.75    15.5    0    -.5    15.5    0.05094856
GW    10    11    0    -15.75    -46.5    0    -15.75    -31    0.05094856
GW    11    11    0    -15.75    -31    0    -15.75    -15.5    0.05094856
GW    37    1    0    -15.75    -31    0    -17.25    -31    0.05094856
GW    217    11    0    -17.25    -46.5    0    -17.25    -31    0.05094856
GW    218    11    0    -17.25    -31    0    -17.25    -15.5    0.05094856
GW    219    23    0    -48.25    -46.5    0    -17.25    -46.5    0.05094856
GW    220    23    0    -48.25    -15.5    0    -17.25    -15.5    0.05094856
GW    239    11    0    15.75    -15.5    0    15.75    -31    0.05094856
GW    240    11    0    15.75    -31    0    15.75    -46.5    0.05094856
GW    252    1    0    15.75    -31    0    17.25    -31    0.05094856
GW    254    11    0    17.25    -15.5    0    17.25    -31    0.05094856
GW    255    11    0    17.25    -31    0    17.25    -46.5    0.05094856
GW    256    23    0    48.25    -15.5    0    17.25    -15.5    0.05094856
GW    257    23    0    48.25    -46.5    0    17.25    -46.5    0.05094856
GW    1    11    0    .5    -46.5    0    15.75    -46.5    0.05094856
GW    2    11    0    -15.75    -46.5    0    -.5    -46.5    0.05094856
GW    3    11    0    .5    -15.5    0    15.75    -15.5    0.05094856
GW    4    11    0    -15.75    -15.5    0    -.5    -15.5    0.05094856
GW    339    27    -15.5    55    17.5    -15.5    0    17.5    0.18644094
GW    339    27    -15.5    -55    17.5    -15.5    0    17.5    0.18644094
GW    339    27    -15.5    55    48.5    -15.5    0    48.5    0.18644094
GW    339    27    -15.5    -55    48.5    -15.5    0    48.5    0.18644094
GW    339    27    -15.5    55    -17.5    -15.5    0    -17.5    0.18644094
GW    339    27    -15.5    -55    -17.5    -15.5    0    -17.5    0.18644094
GW    339    27    -15.5    55    -44.5    -15.5    0    -44.5    0.18644094
GW    339    27    -15.5    -55    -44.5    -15.5    0    -44.5    0.18644094
GW    339    27    -15.5    55    13.5    -15.5    0    13.5    0.18644094
GW    339    27    -15.5    -55    13.5    -15.5    0    13.5    0.18644094
GW    339    27    -15.5    55    44.5    -15.5    0    44.5    0.18644094
GW    339    27    -15.5    -55    44.5    -15.5    0    44.5    0.18644094
GW    339    27    -15.5    55    -13.5    -15.5    0    -13.5    0.18644094
GW    339    27    -15.5    -55    -13.5    -15.5    0    -13.5    0.18644094
GW    339    27    -15.5    55    -48.5    -15.5    0    -48.5    0.18644094
GW    339    27    -15.5    -55    -48.5    -15.5    0    -48.5    0.18644094
GW    176    15    1    -1    0    1    -1    -31    0.05094856
GW    177    15    1    1    0    1    1    -31    0.05094856
GW    178    1    0    -1.7322835    -31    1    -1    -31    0.05094856
GW    179    1    0    1.73228346    -31    1    1    -31    0.05094856
GW    181    15    1    -1    0    1    -1    31    0.05094856
GW    182    15    1    1    0    1    1    31    0.05094856
GW    183    1    0    -1.7322835    31    1    -1    31    0.05094856
GW    184    1    0    1.73228346    31    1    1    31    0.05094856
GW    185    3    1    -1    0    1    1    0    0.05094856
GS    0    0    0.0254
GE    0
GN    -1
EK
EX    0    185    2    0    1    0    0
FR    0    38    0    0    473    6
RP    0    1    10    1510    90.    0.    0.    20.    0.    0.
EN
http://www.freeimagehosting.net/uploads/479f202dd1.png
 

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For one thing, you need to change your Char-impedance in 4nec2 settings to 300 ohms instead of the default 50 ohms.

It takes a while to calculate, but the SWR looks to be pretty high on vhf so it needs more tweaking.

A quick way to look at the SWR figures to subtract from Raw Gain :
Code:
SWR     Mismatch Loss dBi
-----   -----------------
1.0     0
1.5     .18
2.0     .51
2.5     .88
3.0     1.25
3.5     1.60
4.0     1.94
4.5     2.25
5.0     2.55 
6.0     3.08
 

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452 Posts
nice idea love the gain and with the single GH finco a few changes to the connection pionts i have a single with a good swr 2 and AGT of 0.99 :cool:
with a gain of 9.50 dbi and no reflectors nice building block.

Code:
CM Idea from PoppaDigital's Expanded DBGH with Finco 400-a derived Narods
CM wildwillie march9 2011 finco 200 with GH 
CM swr at 2.09 and AGT at 0.99 at 190 mhz 
CM go ahead and build your double now sir 
CM No reflectors or NARODS
CE
GW	1	7	0	2.5	12.5	0	7.5	17.5	0.05094856
GW	2	7	0	2.5	22.5	0	7.5	17.5	0.05094856
GW	3	7	0	2.5	22.5	0	7.5	27.5	0.05094856
GW	4	7	0	2.5	12.5	0	7.5	7.5	0.05094856
GW	5	7	0	2.5	2.5	0	7.5	7.5	0.05094856
GW	6	7	0	2.5	2.5	0	7.5	-2.5	0.05094856
GW	9	7	0	-0.9645665	12.5	0	-5.964567	17.5	0.05094856
GW	10	7	0	-0.9645665	22.5	0	-5.964567	17.5	0.05094856
GW	11	7	0	-0.9645665	22.5	0	-5.964567	27.5	0.05094856
GW	12	7	0	-0.9645665	12.5	0	-5.964567	7.5	0.05094856
GW	13	7	0	-0.9645665	2.5	0	-5.964567	7.5	0.05094856
GW	14	7	0	-0.9645665	2.5	0	-5.964567	-2.5	0.05094856
GW	10	13	0	-14.982283	-3	0	-14.982283	12.5	0.05094856
GW	11	13	0	-14.982283	12.5	0	-14.982283	28	0.05094856
GW	37	1	0	-14.982283	12.5	0	-16.5	12.5	0.05094856
GW	217	13	0	-16.5	-3	0	-16.5	12.5	0.05094856
GW	218	13	0	-16.5	12.5	0	-16.5	28	0.05094856
GW	219	25	0	-47.5	-3	0	-16.5	-3	0.05094856
GW	220	25	0	-47.5	28	0	-16.5	28	0.05094856
GW	239	13	0	16.5177165	28	0	16.5177165	12.5	0.05094856
GW	240	13	0	16.5177165	12.5	0	16.5177165	-3	0.05094856
GW	252	1	0	16.5177165	12.5	0	18	12.5	0.05094856
GW	254	13	0	18	28	0	18	12.5	0.05094856
GW	255	13	0	18	12.5	0	18	-3	0.05094856
GW	256	25	0	49	28	0	18	28	0.05094856
GW	257	25	0	49	-3	0	18	-3	0.05094856
GW	1	13	0	1.5	-3	0	16.5177165	-3	0.05094856
GW	2	13	0	-14.982283	-3	0	5.4637e-16	-3	0.05094856
GW	3	13	0	1.5	28	0	16.5177165	28	0.05094856
GW	4	13	0	-14.982283	28	0	5.4637e-16	28	0.05094856
GW	260	1	0	-0.9645665	12.5	0	5.4637e-16	12.5	0.05094856
GW	261	13	0	5.4637e-16	12.5	0	5.4637e-16	28	0.05094856
GW	262	13	0	5.4637e-16	12.5	0	5.4637e-16	-3	0.05094856
GW	263	1	0	2.5	12.5	0	1.5	12.5	0.05094856
GW	264	13	0	1.5	12.5	0	1.5	28	0.05094856
GW	265	13	0	1.5	12.5	0	1.5	-3	0.05094856
GW	266	1	0	1.5	12.5	0	5.4637e-16	12.5	0.05094856
GW	270	3	0	7.5	27.5	0	10	27.5	0.05094856
GW	271	3	0	-8.464567	27.5	0	-5.964567	27.5	0.05094856
GW	272	3	0	-8.464567	-2.5	0	-5.964567	-2.5	0.05094856
GW	273	3	0	7.5	-2.5	0	10	-2.5	0.05094856
GS	0	0	0.0254		' All in in.
GE	0
EK
EX	0	266	1	0	1	0
GN	-1
FR	0	1	0	0	190	0
RP 0 1 10 1510 90. 0. 0. 20. 0. 0.
 

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452 Posts
Hintr to keep lower or raise the SWR thats were yourt reflectors and NARODS comwe in to play not to close or to far a way and a good SWR and wave patteren can be had your posted NEC file took me 3 mins to ajust to what i have now

looking at 300ohms dbi chart above i loose .51 dbi
 
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