DG7YBN / 40 MHz / YBN 40-3m
  Last Update Apr. 16th 2024


Performance Data and Geometry
Pattern and VSWR
Download as File

YBN 40-3m Yagi   with conventional straight Dipole

This a simple, direct feed 50 ohms 3 ele. Yagi for the 8 m band.

Performance Data

Elements tapered     1/2 in + 3/8 in
Gain vs. isotr. Rad.   7.15 dBi
Gain vs. Dipole        5.0 dBD
-3 dB E-plane         68.2 deg.
-3 dB H-plane        121.8 deg.
F/B                  -19.7 dB
F/R                   -8.5 dB
Impedance               50 ohms
VSWR Band Width     1.18:1 *
Mechan. Length        3261 mm plus offsets
Electr. Length        0.44 λ

Stacking Dist. h-pol.
top-to-bottom         4,22 m = 13.8 ft
side-by-side          6.57 m = 21.6 ft

*) at 41.00 MHz

YBN 40-3m built by John, ZS6JON


Element and Driver diameter are tapered 1/2 in + 3/8 inch.
Elements on boom, holders: Hydraulic Clamps like Stauff or similar.
Dipole on base plate, gap in dipole approx. 15 mm.

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Pattern and VSWR Plots

Elevation and Azimuth plot at 40.68 MHz


RL and SWR plot - simulated


EZNEC file of this Yagi  

STACKING info might follow ...

73, Hartmut, DG7YBN

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