Pole-Mounted Antennas
Mounting of
the rotator on a pole or mast results in a significant 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 attached antenna must have a
net mounted weight (combined weight of antenna plus mast) of 10 kg or less, and the
product of multiplying the [Antenna Wind Load Area (in m2 )] by the [Height of
the Antenna Mast (in m)] must be 0.25 or less.
[Antenna Weight] + [Mast Weight] ≤ 10 kg .
[Antenna Wind Load Area] X [Height of Antenna
Mast] ≤ 0.25
Refer to
the antenna manufacturer’s specification sheet for determining the weight and
the surface area of the proposed antenna.
Yeasu Rotators:
The antenna Wind Loading Area must be less than ,=<0,25 (G-450A) & (G-650A), or =<0,45 (G-1000DXC), or =<0,80 (G-28000DXC)
Yeasu Rotators:
The antenna Wind Loading Area must be less than ,=<0,25 (G-450A) & (G-650A), or =<0,45 (G-1000DXC), or =<0,80 (G-28000DXC)
Example:
For a 50
MHz 5-element antenna of surface area of 0.3 m2 , the above specifications for pole
mounting will be met if (A) the antenna is mounted on a mast not longer than 0.8 m (0.3 X 0.8 = 0.24 < 0.25), and (B) if the mast weight plus
the antenna weight is less than 10
kg . However, if the mast is 1 meter long, the
specification will be exceeded (0.3 X 1 = 0.3 > 0.25).
More: https://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=104&encProdID=9CD2145C24AE53C5A6C62D7D703A9F3C&DivisionID=65&isArchived=0
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