DX Engineering DXE-UN-43 Manuale utente
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
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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
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 Ωto 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:
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: DXE-
MBVA/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.
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DXE-UN-43
Qty
Description
1
DXE-UN-43 Multi-Band UNUN for 43 foot Vertical Antennas
DXE-UN-43-R
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)
DXE-UN-BRKT US Patent No. D597,086
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
DXE-TCB-UNFK
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.
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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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The UNUN has two 1/4-20 connection points and have Wing Nuts
and Flat Washers used for connecting braided feed wires to the
antenna feedpoint and radial system. The antenna feedpoint must be
connected to the positive phase terminal on the DXE-UN-43 UNUN
closest to the Red "+"on the label. The radial system is connected
to the negative terminal nearest the Black "▬"on the label.
DX Engineering Multi-Band Vertical Antenna Systems
The DXE-UN-43 is an enhanced replacement for the 4:1 Balun on the DX Engineering Multi-Band
vertical antenna systems.
Remove the coaxial cable connection from the 4:1 Balun and the two braided feed lines going from
the Balun to the Radial Plate and the antenna feedpoint connection bolt.
Remove the Balun and Balun Shelf from the mounting pipe.
Loosen the Tilt Base bolts for lowering/raising the vertical antenna. Carefully tilt the antenna to the
down position. Ensure you have some support system (table, saw horse, etc.) to support the antenna
while in the down position.
Repositioning the Feedpoint Connection
Hardware
Loosen the two 2" U-Bolt Saddle Clamps holding
the base section to the insulated channel.
Loosen the element clamp located at the top of the
base section and rotate the base section so the
feedpoint is pointing to the left (as you look at the
antenna from the front).
Also ensure there is 1-3/4" between the bottom of
the U-Bolt and the antenna feedpoint hardware.
Tighten the two 2" U-Bolt Saddle Clamps and the
element clamp at the top of the base section.
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Repositioning the Tilt Base on the Mounting Pipe
Loosen the two V-Clamps holding the
Tilt Base to the Mounting Pipe.
Lower the Tilt Base so there is 4-1/2" clearance
between the bottom of the Tilt Base and the Top
of the Radial Plate.
Raise the antenna back to the vertical position. Tighten the
Tilt Base bolts for lowering/raising the antenna.
Assembling the UNUN Mounting Bracket
Using the #6 hex head bolts, #6 flat washers and #6 Nyloc nuts, attach the UNUN to the UNUN
Bracket with the SO-239 connector facing downward. Tighten the Nyloc Nuts so they are snug. Do
not over tighten since the mounting tabs on the UNUN are plastic.
Attach the custom Stainless Steel 90 degree Studded Element Clamps to the patented UNUN
Bracket using the Washers, Aluminum Spacers and #10 Nyloc Nuts as shown below. Snug the #10
Nyloc nuts just to the point that you can still rotate the custom studded element clamps. The #10
Nyloc Nuts will be tightened later.
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Installation of UNUN Assembly to Antenna Lower Section
The completed UNUN and UNUN Mounting Bracket assembly is mounted to the 2" OD antenna
lower base section. To allow easy installation of the UNUN Bracket to the lower base section, open
the upper and lower custom studded element clamps by unscrewing the worm drive of the clamps as
shown in Figure 1.
Figure 1
Position the UNUN Mounting Bracket so the bottom element clamp is located between the
feedpoint hardware and the U-Bolt as shown in Figure 2.
Figure 2
A: Clamps open, Clamp Ends inserted to go around Base Section Element
B: Clamp Ends go behind Base Section Element
Once in position, re-insert the clamp ends into the worm drive of the clamps and using a flat blade
screwdriver or nut driver, snug them up as shown in Figure 3. Note position of lower clamp is
between the feedpoint hardware and the U-Bolt.
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Figure 3
Position the UNUN so it faces forward as shown in Figure 4. Tighten the Upper and Lower
Studded Clamps and tighten the Nyloc Nuts holding the bracket to the Upper and Lower Studded
Clamps.
Feedline Connections
The DXE-UN-43 UNUN is attached to the antenna feedline connections using the DXE-TCB-
UNFK UNUN Feed Point Connection Kit which contains two pre-drilled copper tinned braids.
Both braids are 1" wide by 9" in length. Connect one braid from the antenna feedpoint located on
the base section of the antenna to the terminal on the DXE-UN-43 UNUN closest to the Red "+"
on the label as shown in Figure 5. Do not over tighten the wing nuts. Hand tighten them only, do
not use pliers or other tools to over tighten the wing nuts.
Connect the other 9" braid from the terminal on the DXE-UN-43 UNUN closest to the Black
"▬"on the label to the closest radial wire bolt on the optional DXE-RADP-3 Radial Plate as
shown in Figure 5. Route both braided cables as shown. Ensure the "+" connection is not shorting
out to the "-" side.
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The feedpoint on the antenna bas section can be facing forward, or can be facing to the left (when
looking at the front of the antenna).
Note: Ensure the"-" braid connection to the Radial Plate does not interfere with
the tilting process. If this is a problem, then remove the braid from the
UNUN when tilting the antenna. Remember to properly replace it when
the antenna is in the upright position.
Figure 5
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