DX Engineering DXE-MBV-2 User Manual

Multi-Band
49 Foot Tall
Vertical Antenna

DXE-MBV-2

DXE-MBV-2-INS-Revision 1

© DX Engineering 2016
1200 Southeast Ave., Tallmadge, OH 44278 USA
Phone: [phone] ∙ Tech Support and International: [phone]
Fax: [phone] ∙ E-mail: [e-mail]

Introduction

The DX Engineering DXE-MBV-2 is a custom made fast taper 49 feet high multi-band vertical
antenna system. There are no traps, coils or linear loading elements. Designed with 6063 corrosion­resistant aluminum tubing and stainless steel hardware, this antenna is very durable and attractive.

Features

• Custom designed

• 49 feet overall height

• Stainless Steel Tilt Base included (US Patent No. 7,432,875)

• DXE-RADP-3 Radial Plate included (US Patents No. 6,927,740, D533,167)

• DXE-SSVC-2P Stainless Steel V-Clamp for Radial Plate mounting included

• DXE-RADW-32RT 32 foot Radial Wire Kit (20 radials) included

• DXE-FP-WIRE-N Feedpoint Wire with N-Type Connector Assembly included

• DXE-1023 RF Bulkhead Type N-Connector Adapter included

• Fast Taper from rugged base to sleek top for low wind resistance

• No Coils or Traps - Maximum Radiation Efficiency

• Power Handling up to 5 kW - built to last

• Outboard customer supplied wide-range tuner required

WARNING!

INSTALLATION OF ANY ANTENNA NEAR POWER LINES IS DANGEROUS

Warning: Do not locate the antenna near overhead power lines or other electric light or power

circuits, or where it can come into contact with such circuits. When installing the antenna, take
extreme care not to come into contact with such circuits, because they may cause serious injury or
death.

Overhead Power Line Safety

Before you begin working, check carefully for overhead power lines in the area you will be
working. Don't assume that wires are telephone or cable lines: check with your electric utility for
advice. Although overhead power lines may appear to be insulated, often these coverings are
intended only to protect metal wires from weather conditions and may not protect you from electric
shock

- 1 -

Keep your distance! Remember the 10-foot rule: When carrying and using ladders and other long

Description

Quantity

Description

Quantity

Tilt Base Assembly (patented)

Antenna Assembly

Tilt Base, 3/16" Laser Cut Stainless Steel

1

2.00 x 0.125" x 36" Tube. Drilled

1

DXE-SSVC-2P V-Bolt Saddle Clamp

2

2.125" x 0.058" x 36" Tube. (Split both e nds )

1

Tilt Base, Mast Mount Channel

1

2.000" x 0.058" x 72" Tube. (Split one end)

1

Tilt Base Plate

1

1.875" x 0.058" x 72" Tube. (Split one end)

1

1/4-20 x 2" HH Bolt, full thread

4

1.750" x 0.058" x 36" Tube. (Split one end)

1

1/4" Flat Washer

4

1.625" x 0.058" x 36" Tube. (Split one end)

1

1/4" Split Washer

4

1.500" x 0.058" x 36" Tube. (Split one end)

1

1/4" Dia. X 1/4" x 1/2" OD Alum. Spacer

4

1.375" x 0.058" x 36" Tube. (Split one end)

1

1/4-20 Hex nut

4

1.250" x 0.058" x 36" Tube. (Split one end)

1

1/4" Fender Washer, 1" OD

4

1.125" x 0.058" x 36" Tube. (Split one end)

1

1/4-20 Flanged Nut

2

1.000" x 0.058" x 36" Tube. (Split one end)

1

1/4-20 Nyloc nut

4

0.875" x 0.058" x 36" Tube. (Split one end)

1

3/8" U-Bolt Kits

2

0.750" x 0.058" x 36" Tube. (Split one end)

1

0.625" x 0.058" x 36" Tube. (Split one end)

1

Feedpoint Connection

0.500" x 0.058" x 36" Tube. (Split one end)

1

1/4-20 x 1" HH Bolt, full thread

1

0.375" x 0.058" x 36" Tube. (Plain)

1

1/4" External Tooth Washer

2

DXE-ECL-0500 - Element Clamp

1

1/4" Flat Washer

2

DXE-ECL-0625 - Element Clamp

1

1/4-20 Hex nut

2

DXE-ECL-0875 - Element Clamp

2

DXE-ECL-1000 - Element Clamp

2

Radial Wire System

DXE-ECL-1250 - Element Clamp

1

DXE-1023 RF Bulkhead Type N-Adapter

1

DXE-ECL-1500 - Element Clamp

2

DXE-FP-WIRE-N Feedpoint w/ N-Conn.

1

DXE-ECL-1750 - Element Clamp

2

DXE-RADP-3 Radial Plate w/hardware

1

DXE-ECL-2000 - Element Clamp

2

DXE-SSVC-2P V-Bolt Saddle Clamp

1

DXE-ECL-2250 - Element Clamp

2

Radial Wire Kit - 20 Radials w Term-32 ft

1 Kit

Black Vinyl Cap, 0.343" ID

1

tools, keep them at least 10 feet away from all overhead lines - including any lines from the power
pole to your home.

Tools Required

Two 7/16” wrenches, (one of them should be open-end)
5/16”, 3/8”, 7/16”, and 1/2” wrenches or
5/16”, 3/8”, 7/16”, and 1/2” sockets and drive
Medium size flat blade screwdriver or 5/16” nut driver for the element clamps
Medium size flat blade screwdriver or 1/4” nut driver for the smaller element clamps
Tape measure
Black Felt-tip marker

DXE-MBV-2 Parts List

Manual Updates

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) or contact DX Engineering

by e-mail at: [e-mail] for the latest revision manual.

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Additional Material Needed but not Supplied:

• Antenna Mounting - Steel mounting pipe, 2.0″ OD maximum, 0.25″ wall thickness, 4 feet

long. The standard 1-1/2" galvanized water pipe (with its 1.9" OD) is just fine for this
application and can usually be found at your local home building supply store.

• Quik-Set Concrete - Mounting pipe installation (type depends on your landscape)

• JTL-12555 Jet-Lube SS-30 - To ensure good connection with aluminum. Also used on the

threads of the Stainless Steel Hardware to prevent galling and aid in proper tightening
torque.

Installation

Site Selection

Select a mounting location clear from power lines, structures and other antennas by a minimum of
59 feet. Consider overhead power lines, utility cables and wires. The vertical should be mounted
away from local noise sources or other metallic objects which can re-radiate noise and affect the
tuning, radiation pattern and SWR. Determine the direction you want the antenna to tilt down and
make sure there is adequate clearance (at least 59 feet). There should also be a clear diameter of 65
feet from the antenna for the radial system that will extend away from the antenna.

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, 20 radials, each 32 feet long, should be used with this antenna. Using 32 radials at
65 feet long is preferred and highly recommended to help overcome unknown poor-soil conditions,
improve bandwidth, and ensure the best performance possible from
the vertical antenna. The DXE-RADW-32RT Radial Wire Kit
supplied with this antenna system includes twenty 32 foot long
radial wires with ring terminals installed (on one end of the wires).
The wire is 14 gauge stranded copper with black relaxed PVC
insulation 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 are
connected to the shield of your feedline when using the included DXE-1023 N-Type Bulkhead
connector. The included DXE-RADP-3 Stainless Steel Radial Plate (patented) is 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 optional 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

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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.

Mounting Pipe

Use a customer supplied thick-walled galvanized steel mounting
pipe at least 4 feet long. This will allow approximately 2 feet or
more to be below ground and 20 inches above ground. A thick­walled steel pipe 1-3/4" OD to 2" OD maximum is recommended
with a minimum wall thickness of 1/8" (1/4" preferred) should be
used. The standard 1-1/2" galvanized water pipe (with its 1.9"
OD) is just fine for this application and can usually be found at
your local home building supply store. For permanent mounting,
use a post-hole digger to make the hole deep enough to
accommodate at least 2 feet of pipe and a couple inches of gravel
at the bottom for drainage. Set the mounting pipe on the gravel,
use the pre-mix concrete to fill around the pipe, adding water and
mixing as you fill or mix the concrete first, then pour in the hole
(depends on the type of concrete you purchase). Fill the hole until
the concrete is level with the ground around it. Use a level on the
mounting pipe as you fill the hole to be sure is vertically straight.
Allow adequate time for the concrete to completely set. Your
location, landscape and ground conditions may require different
mounting solutions in order to have the steel mounting pipe and
the vertical antenna in a secure position.

Note: Galvanized steel, rather than aluminum, is much more

suitable for mounting in concrete. Aluminum will
quickly corrode due to incompatibility with the
materials used to make concrete.

Assembly

The DXE-MBV-2 shipping boxes contain all of the parts required for the vertical antenna
construction.

Carefully un-box the antenna and separate the various parts. The antenna element sections are 36"
and 72” long. The 2" OD base element section is drilled for the feedpoint connection. The top 3/8"
OD section and the base section do not have slit ends. The 2-1/8" OD section is slit on both ends.
All the other sections are slit on one end. The vinyl cap for the top element section should be
installed after assembly of the vertical is complete.

- 4 -

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 should also 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 a 2" OD (maximum)

Mounting Pipe already installed per the previous instructions.

Radial Plate to Mounting Pipe

Install the included DXE-RADP-3 Radial Plate (patented) on the 2" OD mounting pipe using the
included DXE-SSVC-2P V-Bolt Saddle Clamp as shown in Figure 1. Mount the Radial Plate so
you have approximately 1" of space between the bottom of the plate and the ground level. This will
allow easy access to install the radial wire hardware. Position the Radial Plate with the feedpoint
hardware hole as shown in Figure 3. This will ensure the Tilt Base action will not interfere with the
feedline wire assembly. The DXE-RADP-3 Radial Plate comes with 20 sets of stainless steel
hardware for mounting the radial wires. For reference, Figure 11 shows the completed antenna
installation.

Figure 1 - DXE-RADP-3 Radial Plate Installation

- 5 -

Attaching the included Ground Radial Wires to the Radial Plate

Using the 20 sets of supplied 1/4" stainless steel hardware (Bolt, Star Washer, Flat Washer, Split
Washer, Nut) connect the included DXE-RADW-32RT Pre-Assembled Radial Wire Kit ground
radial wires to the DXE-RADP-3 Radial Plate as shown in Figure 2. Additional hardware kits are
available (DXE-RADP-1HWK) that contain 20 sets of Radial Plate Hardware are available in case
you loose some hardware, or decide to add more radial wires.

Space the radials out evenly around the Radial Plate. The Radial Plate will accommodate up to 60
radial wires (60 laser drilled holes), or up to 120 radials if doubled up.

Radial Wire Pattern

Figure 2 - Radial Wire Hardware Installation

- 6 -

Tilt Base to Mounting Pipe

Install the Tilt Base to the 2" OD mounting pipe using the two DXE-SSVC-2P V-Bolt Saddle
Clamps allowing approximately 4-1/2" clearance between the bottom of the tilt base plate, to the top
of the DXE-RADP-3 Radial Plate as shown in Figure 3.

Make sure the Tilt Base and DXE-RADP-3 Radial Plate are oriented correctly for the
direction you wish to tilt the antenna. See Figure 8 which shows the tilt action.

Tighten the clamps evenly so the length of the exposed threads is approximately equal. Any clamp
should be tightened evenly from side-to-side with an equal amount of thread above each nut.

Figure 3

- 7 -

Vertical Base Section

The base section is made up of an EXTREN® insulated mounting channel, a mounting plate with
hardware, two 2" x 3/8" U-Bolt assemblies and the base antenna section which is 2" OD thick wall,
36" long with a hole drilled at bottom end for the feedpoint hardware.

Refer to Figure 4 and attach the aluminum backing plate to the back of the insulated channel. The
base hardware kit contains four 2" hex head bolts, four flat washers, four aluminum spacers, four
split washers and four nuts. From the inside of the channel, insert a 2" hex head bolt with a flat
washer through each of the middle four holes, through the backing plate. Put on the aluminum
spacer, a split washer and a plain hex nut. Tighten firmly, but not enough to crush the insulated
channel.

Figure - 4

Using the 36" base section tube, install the feedline 1/4-20 x 1" long bolt through the hole in the
tube from the inside, so the threads stick out.

Put on a 1/4" star washer, 1/4" flat washer, then a 1/4-20 nut and tighten.

Add another 1/4" star washer, 1/4" flat washer and 1/4-20 nut, but do not tighten. The feedline from
the DXE-FP-WIRE-N Feedline Assembly attaches to this hardware in a later step. Figure 5 shows
the installed feedpoint hardware.

Figure 5

- 8 -

Install the lower antenna element section to the insulated channel using the two 2" x 3/8" U-Bolts,
two saddle clamps, four 3/8" flat washers, four 3/8" split washers and four 3/8" hex nuts as shown
in Figure 6. The base section tube should extend 1-3/4" beyond the bottom of the U-bolt clamp.

The feedpoint hardware should be coming out on the left side as you look at the lower section as
shown in Figure 6. This helps ensure when the feedline is connected, it will not interfere with the
tilt action.

When tightening, observe the split washers. When they fully seat (flatten out), the clamp is tight
enough. Any clamp should be tightened evenly from side-to-side with an equal amount of thread
above each nut.

Figure 6

- 9 -

Base Section to Tilt Base

Place the Lower Base Section into the holes of the mounted Tilt Base and loosely install the Tilt
Base mounting hardware shown in Figure 7. Leave the flange nuts and Nyloc nuts slightly loose.

Figure - 7

Using a wrench or nut driver, securely tighten the two Nyloc nuts at the bottom of the patented Tilt
Base. Then loosen them one-half turn each. This will allow proper movement of the Tilt Base while
raising or lowering the antenna. It is not necessary to tighten these nuts more securely unless further
tilt operation is no longer required. They should not be loosened more than one-half turn at any
time.

- 10 -

Test the tilt function to ensure proper clearances. Standing in front of the Tilt Base, lift the antenna
base section, slide it to the right, and let it down slightly until the lower outside bolt is resting in the
pivot point. Then slowly tilt as shown in Figure 8. Make sure when you are tilting the antenna to
lift, slide to the right, and then tilt. Be careful to keep the pivot bolt resting in the pivot point.
Reverse the process when raising the antenna.

It is important to note that the lower, outside bolt becomes the pivot point while raising or lowering
the antenna. This pivot bolt MUST be retained in the pivot point. It seems natural to push the
antenna toward the Tilt Base while raising. Push up while raising, but not toward the base since this
could cause the pivot bolt to lift out of the slot and allow the mechanism to bind up and bend the
lower bolts. Additionally, keep the antenna parallel with the tilt base to avoid any binding.

The Tilt Base is not made to support the whole antenna by itself when tilted. When the antenna is
tilted over, ensure you have some sort of table, stand, or saw horse to set the antenna on to aid in
supporting the weight. When the antenna is in the upright position, ensure the mounting hardware
(reference Figure 7) is tightened.

Figure - 8 - Tilt Action

Note: A pair of sawhorses or ladders should be used to support the vertical sections during

assembly with the tilt-base and whenever the vertical is tilted down. Do not allow the
Tilt Base to support the entire weight of the vertical when horizontal.

Assembling the Vertical Sections

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.

- 11 -

When assembling any telescoping aluminum tubing sections you should take the following steps:

1. Make sure the edges are smooth and not sharp. Deburring may be necessary, since burrs and
shavings can occur on seams as well as edges. All surfaces need to be completely smooth to
allow easy assembly of tubing sections.

Caution

Aluminum tubing edges can be very sharp.

Take precautions to ensure you do not get accidentally cut.

The raised particles and shavings that appear when the aluminum tubing is machined are
referred to as burrs, and the process by which they are removed is known as deburring.

Deburring is a finishing method used in manufacturing. Our aluminum tubing is machine cut on

both ends and machine slit on one end. Although DX Engineering manufactured aluminum
tubing is deburred, you should further assure that there are no ragged edges or protrusions.

Use the DXE-UT-KIT-DBR for this operation.

2. Clean the inside of the aluminum tubing to clear out any dirt or foreign material that would
cause the aluminum tubing sections to bind during assembly. Do not use any type of oil or
general lubricant between the aluminum tubing sections. Oils or general lubricants can cause
poor electrical connections for radio frequencies.

3. Clean the outside of the aluminum tubing to clear any dirt or foreign material that would cause
the clamps to malfunction during assembly.

4. The use of Jet-Lube SS-30 is highly recommended. Jet-Lube SS-30 is an electrical joint
compound which effects a substantial electrical connection between metal parts such as
telescoping aluminum tubing or other antenna pieces. Jet-Lube SS-30 assures high conductivity
at all voltage levels by displacing moisture and preventing corrosion or oxidation.

5. When assembling the aluminum tubing sections, ensure the area is clear of grass, dirt or other
foreign material that could cause problems during assembly of the closely fitted telescoping
sections.

Assemble the vertical sections in an area that is flat and has sufficient room for the length of the
antenna during assembly. Lay the tubing out in descending OD sizes. Orient the slits in the tubes
toward the top of the antenna. The bottom 2" OD base section has no slits and the feedpoint
connection hole at the bottom end. The antenna element sections are 36" and 72” long.

- 12 -

Each tubing section is inserted 4" into the next larger tube. Assembly is easier if the overlaps in the

Element Clamp

Quantity

DXE-ECL-0500 - Element Clamp

1

DXE-ECL-0625 - Element Clamp

1 DXE-ECL-0875 - Element Clamp

2 DXE-ECL-1000 - Element Clamp

2 DXE-ECL-1250 - Element Clamp

1 DXE-ECL-1500 - Element Clamp

2

DXE-ECL-1750 - Element Clamp

2

Figure 9

DXE-ECL-2000 - Element Clamp

2 DXE-ECL-2250 - Element Clamp

2

tubing sections are pre-marked. A dark color felt-tip marker works well. Measure and mark 4" from
the end of each tube without the slit using a marker so it will be clearly visible.

Locate the 15 Element Clamps.

Refer to Figure 11 for element clamp sizes and locations. Slide the clamps over each section
before putting them together. Align the clamps on each section facing the same direction. For final
assembly, all the clamps should be positioned very close to the top of each section and the body of
the clamp should be positioned between the slits as shown in Figure 9.

Making sure dirt or grass does not adhere to the sections to be joined, insert the marked end of an
element tube into the next sized element tube until the 4 inch mark on the element tube is even with
the top of the larger element tube section. Position one of the element clamps at the very end, but
not hanging over the edge. Make sure the body of the element clamp is positioned between the slits
and tighten securely. Repeat the procedure with the marked end of the elements and the other
element tubes using one of the
element clamps as you work your
way up the antenna length.
Continue mating the smaller
tubes inside the larger ones.
Double-check the vertical
sections you have just assembled.

Using a felt tip pen, measure and
mark the antenna sections as
shown in Figure 10. Position one
of the DXE-ECL-2250 clamps at
the very end, but not hanging
over. Make sure the body of the
clamp is positioned between the
slits and tighten securely. Repeat
the procedure for the sections
using the Element Clamps as
shown in Figure 11.

Figure 10

- 13 -

The top section may
be adjusted to vary
the length for fine
adjustment if
necessary.

Overall height is
49 Feet

(Drawing not scale)

-14-

Figure 11 - Finished

Antenna Assembly

- 14 -

Mating the Vertical Sections to the Tilt Base

CAUTION: Attempting final assembly without proper precautions can be dangerous.

wires that may come in contact with the antenna.

You should have someone help you steady the vertical antenna sections during

mating with the base section. Do not attempt to raise or lower the antenna if there

are strong wind gusts, local thunder (lightning) or if there are nearby electrical

Note: A pair of sawhorses or ladders should be used to support the vertical sections

during assembly with the Tilt Base and whenever the vertical is tilted down. Do not
allow the tilt-base to support the entire weight of the vertical when horizontal.

When the upper element sections are assembled together install the black vinyl cap in place at the
top of the smallest element section.

Mate the vertical sections to the base tube section by sliding the bottom 2-1/8" OD element of the
vertical over the 2" OD base section element (which was previously mounted to the insulated
channel). See Figure 11. The two sections will have a snug fit, so use a small amount of Penetrox A
on the bottom section to make the fit easier. Slide the band clamp down to the edge of the bottom
section, between the slits, and tighten.

Raising the Vertical

DANGER: Make sure you have not inadvertently l ocated the

antenna underneath power lines.

Residential power lines are often less than 40' high.

Contact With Any Power or Utility Lines Can Be Lethal !

The tilt base certainly makes it easier however, this antenna can be challenging to put up the first
time or with gusty winds.

While raising the antenna, keep a constant pulling pressure away
from the Tilt Base. This will ensure that the pivot point bolt will
not jump out of the pivot slot and cause the tilt mechanism to
bind up and bend the bolts.

Starting from the top of the antenna, walk it up slowly using an
overhead hand-over-hand motion, maintaining a slow and steady
pace.

The antenna mounting channel must be kept in parallel alignment with the tilt-base plate to prevent
binding until it is positioned in the tilt-base. Once the antenna is vertical, lift and slide the antenna
to the left toward the tilt-base mounting pipe to allow the two parts of the tilt-base to line up and
drop down into the slots. Lightly tighten the top flange nuts on the tilt-base to hold the antenna.

- 15 -

Note:
As you raise the antenna to the
vertical position, it’s important to
also maintain the parallel
alignment between the antenna
mounting channel and the Tilt
Base backing plate to minimize
binding. Make sure the lower tilt­base bolts are never excessively
loose before raising or lowering.
They should be first tightened
securely and then backed off no
more than 1/2 turn.

Once the antenna is fully raised, tighten the tilt base hardware (Top: two Nyloc nuts and two flange
nuts, Bottom: two Nyloc nuts.)

Feedline Connection

Install the DXE-1023 Bulkhead Type-N Connector into the
DXE-RADP-3 Radial Plate as shown in Figure 12. Use the

supplied Hex Nut and External Tooth Washer.

Figure 12 - Bulkhead Connector

Installed in Radial Plate

Install the DXE-FP-WIRE-N Type N Feedpont Connection assembly with Wire and Ring
Terminal to the antenna Feedpoint and the previsously installed bulkhead connector as shown in

Figure 13.

Figure 13 -
DXE-FP-Wire-N
installed

- 16 -

Your coaxial cable from the radio connects direct to the DXE-1023 N-Type bulkhead connector
installed on the DXE-RADP-3 Radial Plate as shown in Figure 13. Weatherproofing this coaxial
connection using TES-06132 - Scotch® Super 33+ and TES-2155 - 3M Temflex™ 2155 Rubber
Splicing Tape is highly recommended.

Tuning the Vertical Antenna System

The use of a customer supplied, high quality outboard tuner is required for any multi-band trapless
vertical antenna system. The tuner should be capable of tuning the wide range of impedances
presented by the antenna and coaxial cable at all the operating frequencies. Tuners of this type
generally have a good quality variable roller inductor and at least one large variable capacitor for
fine tuning.

There are a number of outboard automatic antenna tuners available that are capable of tuning this
type of high performance vertical antenna system.

Tuners which are built into transceivers usually lack sufficient impedance tuning range for this type
of high performance vertical antenna system.

The actual impedance of the multi-band antenna is affected by local conditions, including proximity
to structures, other antennas, number of radials or personal preference for the mounting location. It
may be necessary to adjust the top element section slightly longer or shorter, or to vary the length of
the coaxial cable, if tuning to best SWR is not achieved with your tuner on all bands.

The performance of this versatile, rugged antenna is highly dependent on the ability of your tuner to
deliver a low SWR when tuned. Refer to your tuner user's manual for correct tuner operation.

- 17 -

Optional Accessory Items

DXE-STPL-100P

Radial Wire Anchor Pins, 100/pack

DXE-STPL-300P

Radial Wire Anchor Pins, 300/pack

JTL-12555 Jet-Lube™ SS-30 Pure Copper Anti-Seize

Jet-Lube™ SS-30 Pure Copper Anti-Seize is the top choice of engineers and technicians in government, industry and leading Amateur
Radio contest stations, for protecting mechanical assemblies of aluminum tubing, general hardware and copper grounding
systems. On bonded metal surfaces Jet-Lube™ SS-30 assures electrical and RF conductivity while preventing oxidation
and corrosion. Surpassing the capabilities of other aluminum anti-oxidants, the wide temperature range of Jet-Lube™ SS­30 prevents long-term drying and caking, and allows easy disassembly and effortless cleaning of parts. An
environmentally preferred thread lubricant and conductive termination compound, Jet-Lube™ SS-30 helps keep your
equipment in serviceable condition. It contains a high concentration of copper flakes, a requirement for heavy loads or
compression; controlled frictional characteristics allow the surfaces of nuts and bolts to be tightened to their design torque
specifications. This anti-seize product assures full hydraulic efficiency by allowing the metal surfaces to slide over each
other without damaging metal-to-metal contact. Jet-Lube™ SS-30 is also designed to work as a similar and dissimilar
component between two metal surfaces to prevent seizing and galvanic action. The SS-30 compound formula improves
conductivity and ground continuity - and will not melt in high temperatures. Features include:

* Meets MIL-PRF-907E spec
* K-factor: 0.13
* Service rating: -65 degrees F (-54 degrees C) to 1800 degrees F (820 degrees C)
* SS-30 Resistivity (ohm-CM x 108) 5

* This product is limited to domestic UPS Ground shipping only

DXE-KIT-DBR - DX Engineering Tube Deburring Tool Kit

Designed and manufactured in the USA, DX Engineering Tube Deburring Tools feature hardened steel cutting
surfaces arranged in a conical shape. Both the interior and exterior of the tool's cone may be used to smooth the rough
edges of the inside and outside of the cut ends of pipe and tubing. Its rotational symmetry allows easy reaming and
deburring rough-cut tubing edges with minimum effort. The DXE-UT-2125 is usable on all tubing and pipe sizes
from 3/8” to 2-1/8” OD. The DXE-UT-3500 covers sizes from 1-7/8” to 3-1/2” OD. The complete t o ol kit, model
DXE-UT-KIT-DBR, includes both sizes of conical tools, a small hand deburrer and a half round file. DX
Engineering Tube Deburring Tools are reversible, so they are ideal to debur both ID and OD of aluminum tubing
prior to telescoping the sections together. These tools assure a smooth fit without galling and seizing that can occur
with the slightest roughness. Only a couple of revolutions with very light pressure is needed to produce excellent
results. DX Engineering Tube Deburring Tools may be used to debur tubing and pipe made of aluminum, fiberglass,
copper, steel, plastic pipe, etc.

DXE-STPL - Radial Wire Anchor Pins, 100/pack - No need to bury your radials!

DX Engineering Radial Wire Anchor Pins are perfect for fastening radials below the grass line to eliminate the risk of damaging your
radials during lawn maintenance.

• 100 count - 6'' Pins

• 11-Gauge

TES-2155 - 3M Temflex™ 2155 Rubber Splicing Tape.

Conformable self-fusing rubber electrical insulating tape. It is designed for low voltage electrical insulating and moisture
sealing applications. For outdoor use, it should be protected from UV deterioration with an overwrap of TES-06132

TES-06132 - Scotch® Super 33+.

Highly conformable super stretchy tape for all weather applications. This tape provides flexibility and easy handling for
all around performance. It also combines PVC backing with excellent electrical insulating properties to provide primary
electrical insulation for splices up to 600V and protective jacketing.

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Technical Support

If you have questions about this product, or if you experience difficulties during the installation,
contact DX Engineering at [phone]. You can also e-mail us at:

[e-mail]

For best service, please take a few minutes to review this manual before you call.

Warranty

All products manufactured by DX Engineering are warranted to be free from defects in material and
workmanship for a period of one (1) year from date of shipment. DX Engineering’s sole obligation under
these warranties shall be to issue credit, repair or rep lace any i tem or part t hereof which is prov ed to be o ther
than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts,
adjustment or repairs, or any other work, unless such charges are authorized in advance by DX Engineering.
If DX Engineering’s products are cl ai med to be d efect iv e in materi a l or workmanship, DX Engineering shall,
upon prompt notice thereof, issue shipping instructions for return to DX Engineering (transportation-charges
prepaid by Buyer). Every such clai m for breach of these warranties shall b e deemed to be waived by Buyer
unless made in writing. The above warranti es shall not extend to any products or parts thereof which have
been subjected to any misuse or neglect, damaged by accident, rendered defective by reason of improper
installation, damaged from severe weather including floods, or abnormal environmental conditions such as
prolonged exposure to corrosives or power surges, or by the performance of repairs or alterations outside of
our plant, and shall not apply to any goods or parts thereof furnished by Buyer or acquired from others at
Buyer’s specifications. In addition , DX Engineering’s warranties do not extend to other equipment and parts
manufactured by others except to the extent of the original manufacturer’s warranty to DX Engineering. The
obligations under the foregoin g warranties are limited to the precise terms ther eof. These warranties provide
exclusive remedies, expressly in lieu of all other remedies including claims for special or consequential
damages. SELLER NEITHER MAKES NOR ASSUMES ANY OTHER WARRANTY WHATSOEVER,
WHETHER EXPRESS, STATUTORY, OR IMPLIED, INCLUDING WARRANTIES OF
MERCHANTABILITY AND FITNESS, AND NO PERSON IS AUTHORIZED TO ASSUME FOR DX
ENGINEERING ANY OBLIGATION OR LIABILITY NOT STRICT LY IN ACCORDANCE WITH THE
FOREGOING.

©DX Engineering 2016

DX Engineering®, DXE®, DX Engineering, Inc. ®, Hot Rodz®, Maxi-Core®, DX Engineering
THUNDERBOLT®, DX Engineering Yagi Mechanical®, EZ-BUILD®, TELREX®, Gorilla Grip®
Stainless Steel Boom Clamps, Butternut®, SkyHawk™, SkyLark™, SecureMount™, OMNI-TILT™ are
trademarks of PDS Electronics, Inc. No license to use or reproduce any of these trademarks or other
trademarks is given or implied. All other brands and product names are the trademarks of their respective
owners.

Specifications subject to revision without notice.

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