DG7YBN / 24.9 MHz / YBN 12m-5n
  Last Update June 5th, 2022




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Performance Data and Geometry
Pattern and VSWR
With Ground Gain
Stacking


YBN 12m-5n   with straight split Dipole

24.89 to 24.99 MHz WARC band Yagi.




YBN 12m-5n
Current distribution








Performance Data (24.95 MHz)

Gain vs. isotr. Rad.  10.2 dBi
Gain vs. Dipole        8.0 dBD
-3 dB E-plane         54.6 deg.
-3 dB H-plane         73.0 deg.
F/B                  -24.3 dB
F/R                  -24.3 dB
Impedance               50 ohms
Mechan. Length        8588 mm
Electr. Length        0.71 λ

Stacking Dist. h-pol. (24.95 MHz)
top-to-bottom          10.1 m   or   33 ft

Geometry

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 16 m above perfect ground

At 16 m above perfect ground

Gain vs. isotr. Rad.  16.0 dBi  at  11 deg.
Gain vs. Dipole       13.8 dBD
F/B                  -25.9 dB   at 170 deg.








Stacking










73, Hartmut, DG7YBN



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