DX Engineering DXE-VA-PIVOT-4, Руководство пользователя

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Manual Updates and Information
Every effort is made to supply the latest manual revision with each product. Occasionally a manual
will be updated between the time your DX Engineering product is shipped and when you receive it.
Please check the DX Engineering web site (www.dxengineering.com) for the latest revision manual.
Please
- Take the time to read the entire manual before you start assembly. There are plenty of
pictures and drawings to see, and if you read the entire manual first, you'll get a better feel for the
overall construction methods described. Assembly is not difficult, but there are a number of parts
that must go together in a certain sequence to make assembly easier.
Installation Sequence
1. Site Selection
2. Mounting Pipe
3. Coaxial Cable to Mounting Pipe
4. Radial System Suggestions
5. Pivot Base Assembly (US Patent No. 8,130,168)
6. Mounting Pivot Base to Mounting Pipe
7. Optional DXE-VRW-1 Manual Winch installation and use
Site Selection
Select a mounting location clear from power lines, structures and other antennas by a minimum of
78 feet (68 + 10 ft safety rule).
Consider overhead power lines, utility cables and wires . The
further away the vertical is mounted from local noise sources or other metallic objects, which can
re-radiate noise and affect the tuning, radiation pattern and SWR, the better. Determine the direction
you want the antenna to pivot and make sure there is adequate clearance (at least 80 feet).
Mounting Pipe
Use a customer supplied 2-1/2" schedule 80, which has an outside diameter (OD) of 2.895",
galvanized steel thick-walled mounting pipe
at least 7-1/2 feet long. This will allow approximately
4-1/2 feet below ground and 37 inches above ground.
Some manufacturers use the term DOM (drawn over mandrel) which will give you a true OD
dimension. Other types of mounting pipe may be used but due to lateral strength needed ensure the
mounting pipe is strong enough. The material most available is ASTM A513 Type 5 which is a
1020 material. Some pipe suppliers list the material as either 1020 or 1026. Type 1020 has the
following properties:
ASTM A513 (1020): Up to 2-3/4" OD with maximum wall thickness of 0.25"
Tensile: 80,000 PSI. Yield: 70,000 PSI. Elongation in 2": 15%. Rockwell Hardness: B80
ASTM A513 (1020): Over 2-3/4" OD with wall thickness heavier than 0.25"
Tensile: 70,000 PSI. Yield: 60,000 PSI. Elongation in 2": 20%. Rockwell Hardness: B80
3.00" OD x 0.25" wall thickness (or more) of 65,000 PSI yield tubing may also be used.