Special
Multi-Band Vertical Antenna
UNUN
UNUN, UNUN Bracket and UNUN Retrofit Information
DXE-UN-43 / DXE-UN-BRKT / DXE-UN-43-R
(US Patent No. D597,086)
DXE-UN-43-INS Revision 4c
© DX Engineering 2018
1200 Southeast Ave. - Tallmadge, OH 44278 USA
Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200
Fax: (330) 572-3279 ∙ E-mail: DXEngineering@DXEngineering.com
Table of Contents
Introduction
1
DX-UN-43 UNUN Features
2
Supplied Items
2
Parts List
DXE-UN-43
3
DXE-UN-43-R
3
DXE-UN-BRKT (US Patent No. D597,086)
3
DXE-TCB-UNFK
3
Installing the UNUN
4
DX Engineering Multi-Band Vertical Antenna Systems
5
Repositioning the Feedpoint Connection Hardware
5
Repositioning the Tilt Base on the Mounting Pipe
6
Assembling the UNUN Mounting Bracket
6
Installation of UNUN Assembly to Antenna Lower Section
7
Feedline Connections
8
Other Manufacture's Non-Resonant 43 foot Vertical
Antenna systems
10
Radial System
11
Tuning the Vertical Antenna System
11
Manual Updates
12
Optional Items
12
Technical Support
15
Warranty
15
Introduction
The DXE-UN-43 DX Engineering Multi-Band Vertical UNUN built with proven Maxi-Core®
Technology is a matching device specifically designed for application with non-resonant 43 foot
tall vertical multi-band antennas.
The DXE-UN-43 assures the best efficiency from your vertical multi-band antenna and
transmission line/tuner installation. Using the DXE-UN-43 results in minimizing the additional
transmission lines losses caused by SWR and allows your antenna to perform to its full potential.
The DXE-UN-43 reduces the stresses on your equipment more efficiently than similar competitive
products.
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By allowing your wide-range tuner to easily match the antenna’s complex impedance, low
DX Engineering
Part Number
Description
DXE-UN-43
DXE-UN-43 only - no extra parts - ideal for replacing competitive UNUNs
and Baluns for other homebrew or other manufacturers 43 foot vertical
antenna systems on the market.
DXE-UN-43-R
Retrofit kit for DX Engineering Multi-Band Vertical Antenna Systems: DXEMBVA/VE series. Includes DXE-UN-43 UNUN, DXE-UN-BRKT UNUN
Mounting Bracket (US Patent No. D597,086) and all hardware. Also includes
one DXE-TCB-UNFK Feedpoint Connection Kit. May also be used for other
similar vertical multi-band antennas.
DXE-UN-BRKT
DXE-UN-43 Mounting Bracket with Custom 90 degree Stainless Steel
Studded Clamps and all hardware. (US Patent No. D597,086)
DXE-TCB-UNFK
UNUN Feedpoint Connection Kit that contains two 1” wide x 9" long copper
tinned braids soldered and drilled on each end with a 1/4” hole for easy
connection to the DXE-UN-43 UNUN.
frequency performance is improved over other devices currently available.
Note: TES-81343 Never-Seez® or DXE-NSBT8 Anti-Seize should be used on all clamps, bolts and
stainless steel threaded hardware to prevent galling and to ensure proper tightening.
DXE-UN-43 UNUN Features
Full band tunable coverage on 160-10 meters with an SWR under 1.5:1
Customer supplied wide band tuner required
Impedance: 200 Ω to 50 Ω - optimized for 43 ft verticals
Ratio: 4:1 Specifically designed for Multi-Band 43 foot Vertical Antennas
Power Handling: 2 KW / 5 KW Peak - Handles rated power with minimal energy loss so
there is no thermal related failure
Silver / PTFE SO-239 input connector
Two 1/4-20 feedpoint connection studs with Stainless Steel Flat Washers, Split Washers,
Fender Washers & Wing Nuts
High impact plastic, weather sealed NEMA-spec case: 2-1/2" x 4" x 4" inches (HxWxL)
Shares the same mounting footprint as other similar competitive products, so it may be
easily substituted in existing installations for superior performance
Supplied Items:
Depending on your application, The DXE-UN-43 comes in the following configurations:
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DXE-UN-43
Qty
Description
1
DXE-UN-43 Multi-Band UNUN for 43 foot Vertical Antennas
Qty
Description
1
DXE-UN-43 Multi-Band UNUN for 43 foot Vertical Antennas
1
Mounting Bracket for the DXE-UN-43 - (US Patent No. D597,086)
4
# 6 x 3/4" long Stainless Steel Hex Head Bolts
8
# 6 Stainless Steel Flat Washer
4
# 6 Stainless Steel Nyloc Nut
2
Custom Stainless Steel 90 degree studded Element Clamp
2
1/8" thick Aluminum Spacer for #10 Hardware
2
# 10 Stainless Steel Nyloc Nut
4
# 10 Stainless Steel Flat Washer
1
DXE-TCB-UNFK - 1/2" x 9" Soldered & drilled Braided Feedpoint Straps (2)
Qty
Description
1
Mounting Bracket for the DXE-UN-43 - (US Patent No. D597,086)
4
# 6 x 3/4" long Stainless Steel Hex Head Bolts
8
# 6 Stainless Steel Flat Washer
4
# 6 Stainless Steel Nyloc Nut
2
Custom Stainless Steel 90 degree studded Element Clamp
2
1/8" thick Aluminum Spacer for #10 Hardware
2
# 10 Stainless Steel Nyloc Nut
4
# 10 Stainless Steel Flat Washer
Qty
Description
1
1” wide x 9" long copper tinned braids (2) soldered and drilled on each
end with a 1/4” hole for easy connection to the DXE-UN-43 UNUN.
Two per package.
DXE-UN-43-R
DXE-UN-BRKT US Patent No. D597,086
DXE-TCB-UNFK
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Installing the UNUN
When used with the optional DXE-UN-BRKT, the UNUN may be attached to the 2" OD base
section of any non-resonant 43 foot tall
vertical antenna system, including your
own home-brew creation. It also shares
the same mounting footprint as other
similar competitive products, so
it may be easily substituted in existing
installations for superior performance.
The DXE-UN-43 may also be mounted
on a wood post or other mounting
scheme using your own hardware.
The optional DXE-UN-BRKT comes
with: One UNUN Bracket, four #6 x
3/4" long Stainless Steel Hex Head
Bolts, eight #6 Stainless Steel Flat
Washers, four #6 Nyloc Nuts, two
Custom 90 degree Studded Element Clamps, two #10 Nyloc Nuts, two 1/8" thick Aluminum
Spacers and four #10 flat washers.
The UNUN should be mounted with the SO-239 connector facing downward to allow drainage of
any condensation from the weep
holes in the high impact plastic,
weather sealed NEMA-spec case.
Mount the UNUN to the UNUN
Bracket using the hardware as shown.
The custom studded element clamps
are mounted to the UNUN Bracket as
shown.
As with all coaxial cable connections,
you should use TES-2155 3M
Temflex™ Rubber Splicing Tape, with an overwrap of TES-06132 Scotch® Super 33+ Vinyl
Electrical Tape for weatherproofing.
A good RF connection must be made from the UNUN to both the vertical radiator and the radial
system. DX Engineering offers the optional DXE-TCB-UNFK UNUN
Feedpoint Connection Kit that contains two 1” wide x 9" long copper
tinned braids soldered and drilled on each end with a 1/4” hole for easy
connection to the UNUN. If your application requires a different connection style or layout, DX
Engineering can assist you. Call DX Engineering for suggestions.
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