DG7YBN / 24.9 MHz / YBN 12m-4w
  Last Update May 5th, 2022


Performance Data and Geometry
Pattern and VSWR
With Ground Gain

YBN 12m-4w   with straight split Dipole

24.89 to 24.99 MHz WARC band Yagi in OWA-style.

YBN 12m-4w
Current distribution

Performance Data (24.95 MHz)

Gain vs. isotr. Rad.   8.23 dBi
Gain vs. Dipole        6.1 dBD
-3 dB E-plane         62.7 deg.
-3 dB H-plane         99.2 deg.
F/B                  -20.4 dB
F/R                  -12.5 dB
Impedance               50 ohms
Mechan. Length        4670 mm
Electr. Length        0.39 λ

Stacking Dist. h-pol. (24.95 MHz)
top-to-bottom          7.9 m   or   26 ft


For building on a 40-50 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.  14.0 dBi  at  14 deg.
Gain vs. Dipole       11.9 dBD
F/B                  -18.7 dB   at 166 deg.


73, Hartmut, DG7YBN

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