DX Engineering DXE-7580FS-VA-3, Руководство пользователя

Страница: 7 / 40

- 6 -
Radial System
The use of a radial system is a key requirement for a high performance quarter wave vertical
antenna system. With a vertical antenna system, the radials are the second half of the antenna. The
radials contribute to the radiation efficiency of the entire vertical antenna system.
At a minimum, 32 radials, each 65 feet long, should be used with this antenna. DXE-RADW Radial
Wire, a 14 gauge stranded copper with black relaxed PVC
insulation wire is suggested for the best results.
The wire radials should placed as symmetrically as possible
straight from the feedpoint around the vertical antenna and
spaced evenly, regardless of how many radials are used. Do
not cross or bunch any radial wires as this nullifies their
effectiveness. If you have limited space, put in as many
straight radials as you can. The radials must be connected to
the shield of your feedline. The
DXE-RADP-3 Stainless Steel
Radial Plate is an ideal optional item which provides an
excellent system for attaching radial wires to your vertical
antenna system feedpoint.
Radial wires can be laid on the roots of the grass using
DXE-
STPL Radial Wire Anchor Pins to hold them down. Using enough staples will ensure the wires will
not be snagged by mowers, people, or animals. Grass will quickly overgrow the radials and it will
be virtually impossible to see them. An article describing this process is available on the DX
Engineering website in the
Tech Info section. Radials can also be buried just under the surface by
using a power edger to make a slit in the soil.
Assembly Notes
Note: JTL-12555 Jet-Lube™ SS-30 Anti-Oxidant should be used between all antenna
element sections. Jet-Lube™ SS-30 is an electrical joint compound to affect a substantial
electrical connection between metal parts such as telescoping aluminum tubing or other
antenna pieces. It ensures high conductivity at all voltage levels by displacing moisture and
preventing corrosion or oxidation.
Jet-Lube™ SS-30 must be used on all element clamps and stainless steel threaded hardware
to provide good electrical contact, prevent galling, allowing easier disassembly and to ensure
proper tightening.
Note: The following assembly instructions are based on using an optional DXE-
VGMT-3CG Mounting Pipe, with the optional DXE-VR-1 Manual Winch,
optional DXE-RADP-3 Radial Plate with one optional DXE-SSVC-3P V
Clamp and one optional DXE-UHF-FDFB-KIT - SecureMount
™
dual SO-
239 Bulkhead Connector.