Yaesu G-1000DXA User Manual

4
G-800DXA / -1000DXA / -2800DXA User Manual
Antenna Considerations
The types of antennas that can be attached to this product differ widely, depending on the installation method, local terrain,
and the maximum expected wind speeds at your location.
The following pages described typical antennas which are acceptable for installation with the
G-800DXA
,
G-1000DXA
or
G-2800DXA
. The discussion below assumes maximum wind speeds of 30 meters per second, and it is recommended that
you include a safety margin of at least 40 % to account for higher wind gusts or other factors which might potentially cause
damage to your installation.
Pole-Mounted Antennas
Mounting of the rotator on a pole or mast results in a signicant de-rating of the size of the antenna which can be mounted,
due to the tremendous bending forces applied to the rotator’s clamps. For pole mounting, the product of multiplying the
[Antenna Wind Load Area (in m
2
)] by the [Height of the Antenna Mast (in m)] must be less than
0.45
(
G-800DXA/-
1000DXA
) or
0.8
(
G-2800DXA
). See below Table and Figure.
[
Antenna Wind Load Area
] x [
Height of Antenna Mast
] =
0.45
(
G-800DXA/-1000DXA
)
0.8
(
G-2800DXA
)
Refer to the antenna manufacturer’s specication sheet for determining the weight and the surface area of the proposed an-
tenna.
Example:
For a 14 MHz 3-element Yagi of Surface area of 0.7 m
2
(see Table), the above specications for pole mounting
will be met if the antenna is mounted on a mast not longer than 0.3 m (0.7 m
2
x 0.3 m = 0.21 <
0.27
[0.45 x 40
% safety margin]:
G-800DXA/-1000DXA
), or 0.6 m (0.7 m
2
x 0.6 m = 0.42 <
0.48
[0.8 x 40 % safety mar-
gin]:
G-2800DXA
).
Advice:
We recommend that your antennas/mast should not exceed 60 % of the maximum rating, to ensure a safety
margin.
Less than 0.3m (G-800DXA/-1000DXA)
Less than 0.6 m (G-2800DXA)
Optional Mast Clamp
GC-038 (for G-800DXA/-1000DXA) or GC-048 (for G-2800DXA)
Example of a 14 MHz Band, 3-Element Yagi Antenna
Wind Loading Areas for Common Antennas (Typical)
Band
(MHz)
Elements Area (m
2
)
Band
(MHz)
Elements Area (m
2
)
Band
(MHz)
Elements Area (m
2
)
7 2-element 2.2 28 3-element 0.3 50 4-element 0.25
7 1-element, w/loading coils 0.2 28 4-element 0.42 50 5-element 0.3
7 2-element, w/loading coils 0.5 28 5-element 0.6 50 6-element 0.37
7 3-element, w/loading coils 1.1 28 2-element, Swiss Quad 0.3 50 2-element, Swiss Quad 0.3
14 3-element 0.7 7/14 3-element, trapped 0.5 144 10-element 0.2
14 4-element 1.2 7/14 4-element, trapped 0.8 144 10-element, stacked 0.44
14 5-element 1.7 14/21 3-element, trapped 0.4 144 10-element, x 4 0.95
21 3-element 0.45 14/21 4-element, trapped 0.5 144 10-element, x 4 x 2 2
21 4-element 0.6 21/28 4-element, trapped 0.3 430 12-element 0.06
21 5-element 0.8 21/28 5-element, trapped 0.4 430 12-element, stacked 0.12
21 6-element 1.3 14/21/28 3-element, trapped 0.4 430 12-element, x 4 0.3
21 2-element, Swiss Quad 0.3 14/21/28 4-element, trapped 0.5 430 12-element, x 4 x 2 0.6

Yaesu G-1000DXA Specifications

General

Brand	Yaesu
Model	G-1000DXA
Category	Controller
Language	English