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Performance Data and Geometry
Pattern and VSWR
Download as File
Stacking
GTV 50-6m Yagi with bent Driven Element
This is medium length 6m band Yagi with high F/B and good G/T.
The bent DE (K6STI style) transforms from low impedance to 50 ohms
at feed point for direct feed.
Date of issuing this design : 04th of Apr. 2024
GTV 50-6m at BG9MM
![](pics_GTV50_6m/GTV50_6m_at_BG9MM.png)
GTV 50-6m built by BG5TOX, Xu Da et al.
![](pics_GTV50_6m/GTV50_6m_by_BG5TOX_photo_001_720px.png)
![](pics_GTV50_6m/GTV50_6m_current_distr.png)
Performance Data
Elem. 16 mm
Gain vs. isotr. Rad. 11.9 dBi
Gain vs. Dipole 9.7 dBD
-3 dB E-plane 46.5 deg.
-3 dB H-plane 57.0 deg.
F/B -30.6 dB
F/R -23.0 dB
Impedance 50 ohms
VSWR Band Width 1.51:1 *
Mechan. Length 6782 mm plus offsets
Electr. Length 1.13 λ
Stacking Dist. h-pol., 50.3 MHz
top-to-bottom 6.79 m = 24.8 ft
side-by-side 7.55 m = 20.5 ft
*) as in VE7BQH G/T table = at 50.50 MHz
Geometry
Table 1: GTV50-6m, elements 1/2 inch, dipole 5/8 inch on a 1-1/4 inch square boom:
"Ready to saw and drill" data for elements on boom with BC acc. DG7YBN for Stauff Clamps:
Boom shape: square
Boom: 1-1/4 x 1-1/4 inch
Offset rear: 40 mm
Offset front: 40 mm
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Stauff Clamps 2-15-PP
![](pics_YBN50_7mzc/Stauff_clamp.jpg)
plus screws M6 x 75
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Note:
This includes a "Segmentation Density Correction" (SBC) of 2.14 mm
![](pics_GTV50_6m/GTV50_6m_5_8in_ele_BC_excel_stauffs.png)
Sketch of bent dipoles geometry:
![](pics_GTV50_6m/GTV50_6m_sketch_bent_dipole.png)
This design has been viewed how often after the first built has been published in May 2024?
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Pattern and VSWR Plots
Elevation and Azimuth plot at 50.1 MHz
![](pics_GTV50_6m/GTV50_6m_azim_plot.png)
RL and SWR plot - simulated
![](pics_GTV50_6m/GTV50_6m_vswr_rl_4nec2.png)
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Downloads
none so far
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Stacking
2 x vertical GTV50-6m:
Elevation plot at 50.3 MHz
At 100 percent of distance per DL6WU formula:
Stacking Dist. DL6WU Formula
H-plane 6.245 m
E-plane 7.549 m
Free space and with lower Yagi at 10 m above 'perfect ground'
![](pics_GTV50_6m/2x_vert_GTV50_6m_elev_plot_100percent_DL6WU_10m_abv_perfect_gnd.png)
At 90 percent of distance per DL6WU formula:
Stacking Dist. DL6WU Formula
H-plane 5.621 m
E-plane 6.794 m
Free space and with lower Yagi at 10 m above 'perfect ground'
![](pics_GTV50_6m/2x_vert_GTV50_6m_elev_plot_90percent_DL6WU_10m_abv_perfect_gnd.png)
More stacking Info may follow
![](../up_icon.gif)
73, Hartmut, DG7YBN
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