DG7YBN / 24.9 MHz / GTV 12m-3m
  Last Update May 5th, 2022


Performance Data and Geometry
Pattern and VSWR
With Ground Gain

GTV 12m-3m   with straight split Dipole

24.89 to 24.99 MHz WARC band bent dipole Yagi. The bent DE (K6STI style) transforms to 50 ohms at feed point for direct feed. Design date of issue: 2022.05.05

GTV 12m-3m
Current distribution

Performance Data (24.95 MHz)

Gain vs. isotr. Rad.   7.3 dBi
Gain vs. Dipole        5.1 dBD
-3 dB E-plane         67.8 deg.
-3 dB H-plane        118.6 deg.
F/B                  -24.4 dB
F/R                   -8.2 dB
Impedance               50 ohms
Mechan. Length        3630 mm plus offsets
Electr. Length        0.30 λ


For building on a 35-50 mm boom, 20 mm mid-element tubes insulated with hydraulic clamps like from co. Stauff:

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Pattern and VSWR Plots

Elevation and Azimuth plot at 24.95 MHz


SWR and Return Loss plots - simulated with 4nec2

Radiation pattern with Ground Gain

At 12 m above perfect ground

At 12 m above perfect ground

Gain vs. isotr. Rad.  13.2 dBi  at  15 deg.
Gain vs. Dipole       11.0 dBD
F/B                  -32.1 dB   at 168 deg.


73, Hartmut, DG7YBN

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