DX Engineering DXE-ATSA-1 Manuel utilisateur

Auto Tuned Multi-Band HF

Stealth Antenna System

DXE-ATSA-1

DXE-ATSA-1-INS Revision 0d

DXE-ATSA-1 shown with optional DXE-SA80-AOK

1200 Southeast Ave. - Tallmadge, OH 44278 USA

Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200

Fax: (330) 572-3279 ∙ E-mail: [email protected]

- 1 -

Introduction

Living in an area where antennas are not allowed? DX Engineering has designed a complete

antenna system that will allow Ham Radio Operators living under the shadow of HOA controlled

areas to get on the air easily.

Typically, with even a short 26 foot wire antenna, you can be on the air on all bands 40M and up –

And with the included DX Engineering 45 foot vertical wire antenna element you can be on all

bands 80M - 10M! Every antenna installation is different. In some cases, an excellent, hi-

performance radial system may cause the tuner to have difficulty tuning certain frequencies in the

80 meter band. If this is encountered, the best solution is to install the optional DXE-SA80-AOK 80

Meter Tuning Coil (see page 15).

The very low profile Remote Tuning Unit [RTU] is easily hidden - even in small bushes or shrubs -

and the only thing that shows is the wire antenna element which can be very small diameter for a

near-zero visual impact.

This is a complete system including the tuner, MatchBoxx™, stainless steel mounting shelf with

integral radial plate, the radial wire, three patented serpentine insulators and all hardware.

Everything is supplied that you will need for a no compromise installation that will get you on the

air and operating right under their noses.

This system can be used if your shack is on the main floor, basement or any other location as long

as you can run any size coax to the RTU located outside. There are no extra control lines necessary

since the RTU is completely self contained and even the power necessary to run it is carried by the

coax. There is no coax loss due to high SWR since the RTU will automatically match your coax to

the antenna at any HF frequency within seconds.

The included MFJ-927 IntelliTuner™ (RTU) lets you rapidly tune the DXE-ATSA-1 stealth

antenna automatically.

The DXE-ATSA-1 uses the MFJ-927 Remote Tuner as the central tuning engine, however, there

are certain segments of the amateur bands that even this fine tuner will not be able to tune. That's

where the DX Engineering MatchBoxx™really shines. The custom engineered MatchBoxx™was

specifically designed and manufactured to work with the MFJ-927 and the 46 foot vertical element

in a winning combination allowing you to talk to the world on the amateur bands.

MFJ's exclusive InstantRecall™, IntelliTune™ and AdaptiveSearch™ algorithms give you fast

automatic tuning with more than 20,000 non-volatile VirtualAntenna™ memories. The tuner

includes a highly efficient switching L-network with wide matching capability, 1.8 to 30 MHz

coverage, a radio interface port, and heavy-duty 10 amp/1000 volt relays.

The MFJ tuner is rated at 200 watts SSB/CW. Furnished with MFJ-4117 Bias Tee for inserting 12

VDC from your power source (or DXE-PSW-12D1A power supply) on the coaxial cable to the

remote tuner.

- 2 -

Tools Required

Nut Drivers 1/4”, 5/16”, 3/8”, 7/16”

Open End Wrenches 5/16”, 3/8”, 7/16”

Wire Cutter

Wire Stripper

Terminal Crimper

Optional (for radial wires) Soldering Iron and Solder

Please read and understand the instruction manual that comes with the MFJ-927 Remote

IntelliTuner™ Automatic Antenna Tuner.

There is information included in that manual that is critical to proper operation of both the

IntelliTuner™ Automatic Antenna Tuner and the Bias "T".

There is also troubleshooting information and tuner reset information that may be very

helpful.

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) for the latest revision

manual.

Assembly Steps

The DXE-ATSA-1 Auto Tuned Multi-Band HF Stealth Antenna System is assembled in the

following steps:

Installing Ground Spikes and Antenna Insulator on Shelf

MatchBoxx™installed on Shelf

MFJ-927 Tuner installed on Shelf

Connecting Ground Wire and Tuner Wires to Shelf and MatchBoxx™

Site Selection

Coaxial Cable Installation

Radial System and Attaching Ground Radial Wires to Shelf

Wire Antenna Element to MatchBoxx™

Attaching Wire Antenna Element to the End Insulators

Attaching Support Rope to the End Insulators

Bias "T" connections

Using the MFJ-927 Auto-Tuner

- 3 -

Parts List for the DXE-ATSA-1

Quantity

Description

DX Engineering custom Laser Cut Stainless Steel Mounting Shelf with integral Radial Wire

connection points

Laser Cut Stainless Steel Leg

DXE-RADW-500 Bulk Radial Wire

DXE-STPL-100P Metal Lawn Staples - 100

DX Engineering custom molded End Insulator with special serpentine wire slots - patented

MFJ-927 IntelliTuner™ with external Bias "T", 2.1 mm dc cord and MFJ instruction manual

UHF Right Angle Adapter

SYN-DBR-94-100 3/32" Dia. Double Braided Dacron/Polyester Rope, 100 Foot Roll

Mounting legs to shelf

1/4-20 x 1" long Stainless Steel Hex Head Bolt

1/4" Stainless Steel External Tooth Washer

1/4" Stainless Steel Flat Washer

1/4-20 Stainless Steel Nyloc Hex Nut

Antenna Insulator and mounting it to shelf

DX Engineering custom molded End Insulator with special serpentine wire slots

10-24 x 3/4" Stainless Steel Hex Head Bolt

#10 Stainless Steel External Tooth Washer

10-24 Stainless Steel Nyloc Hex Nut

MatchBoxx™mounting to shelf

10-24 Stainless Steel Nyloc Hex Nut

10-24 Stainless Steel Hex Nut

#10 Stainless Steel Thin Flat Washer

# 10 Stainless Steel External Tooth Star Washer (for GND wire attachment)

External Connections to MatchBoxx ™(Installed on MatchBoxx™)

10-24 Stainless Steel Wing Nut

#10 Stainless Steel Split Washer

#10 Stainless Steel Flat Washer

#10 Stainless Steel External Tooth Washer

10-24 Stainless Steel Hex Nut

3 Wire assemblies

45 Foot Wire Antenna Element, Ring Terminal - Soldered on one end

6.5" Wire from "Tuner" on MatchBoxx™to MFJ 927 Tuner (one end ring terminal soldered,

other end stripped 1/2" & soldered)

3.5" Wire from GND to Radial Plate connection - Ring Terminals both ends & soldered

Set of Stainless Steel hardware for radial wire attachment (20)

10-24 Stainless Steel Hex Head Bolt x 1/2" long

#10 Stainless Steel External Tooth Washer

#10 Tinned Ring Terminal

#10 Stainless Steel Flat Washer

#10 Stainless Steel Split Washer

10-24 Stainless Steel Hex Nut

Hardware for mounting Tuner to shelf (shelf has PEM nuts)

6-32 x 1/2" Stainless Steel Hex Head Bolt

- 4 -

Recommended Optional Items

Quantity

Description

DXE-PSW-12D1A AC Adapter 12 VDC/1000 ma

PTX-81343 Anti-Seize, 1 oz Squeeze Tube

SUM-900031 Automatic Wire Stripper/Crimper/Cutter, 24-10 Ga.

TES-2155 3M Temflex™ 2155 Rubber Splicing Tape

TES-06132 Scotch® Super 33+ Vinyl Electrical Tape

Shelf

The shelf is the mounting platform for all of the parts. Figure 1 is the top view of the DX

Engineering custom laser cut stainless steel mounting shelf with integral radial wire connection points and

shows all the holes with a reference for what will be installed in them.

Figure 1

Shelf

Top

View

- 5 -

Installing Ground Spikes and Antenna Insulator

Note: UMI-81343 Anti-Seize should be used on all stainless steel hardware to prevent galling.

Using the included stainless steel hardware, mount the four ground spikes as shown in Figure 2 to

the shelf using a 7/16" nut driver. The spikes point downward. The external tooth washer is installed

between the bottom of the shelf and the top of the spike to ensure a good RF connection.

Figure 2 - Spike Mounting

Mount the patented wire antenna serpentine insulator to the shelf using one hex bolt, flat washer and

Nyloc hex nut using a 5/16" and 3/8" nut driver as shown in Figure 3. [The other 2 insulators in this

hardware pack are used later in the installation procedure.]

Figure 3 - Wire Antenna Insulator

- 6 -

Installing MatchBoxx™

Installing the MatchBoxx™to the shelf is a two step procedure. First install the stainless steel

hardware using a 5/16" and 3/8" nut driver on each of the four corners of the MatchBoxx™as

shown in Figure 4. Tighten securely, but do not over tighten.

Figure 4

Install the MatchBoxx™through the bottom of the shelf, and install the flat washer and Nyloc nut

using a 3/8" nut driver as shown in Figure 5.

Figure 5

Installing MFJ-927 Tuner to Shelf

Install the included right angle UHF adapter firmly onto the SO-239 connector labeled

"TRANSMITTER" in the direction as shown in Figure 6.

Figure 6

- 7 -

The MFJ-927 Tuner is held onto the shelf using four hex head bolts that get screwed into four PEM

nuts that are permanently installed in the shelf.

Place the tuner on the top of the shelf so there is access to the SO-239 and red binding post through

the open area on the bottom of the shelf as shown in Figure 6.

Line up the four mounting holes with the PEM nuts and install the four 6-32 x 1/2" Stainless Steel

Hex Head Bolts using a 1/4" nut driver as shown in Figure 7.

Figure 7

Connecting Wires to the MatchBoxx™, Tuner and Shelf

One 3-1/2" wire with ring terminals on both ends is connected from the "GND" connector on the

MatchBoxx™to the hex bolt used on the MatchBoxx™. This wire connects the MatchBoxx™to

the shelf (ground) as shown in Figure 8.

Remove the existing Nyloc hex nut and flat

washer. Install an external tooth washer,

then one end of the 3-1/2" wire, the flat

washer and Nyloc hex nut. Do not tighten. If

the ring terminal is allowed to move, it will

make connecting the other end of the 3-1/2"

wire a bit easier.

On the MatchBoxx™"GND" terminal, remove the wing nut, split washer and flat washer. Install

the other end of the 3-1/2" wire coming from the shelf grounding point. Re-install the flat washer,

lock washer and wing nut. Tighten the wing nut firmly. Do not over tighten. Pliers are not needed.

Move the ring terminal at the other end so the wire is placed properly and tighten the Nyloc nut.

Figure 8

- 8 -

The 6-1/2" wire with one ring terminal is installed from the MatchBoxx™"TUNER" connection to

the MFJ-927 red binding post labeled "WIRE" as shown in Figure 9.

On the MatchBoxx™"TUNER" terminal, remove the wing nut, split washer, and flat washer.

Install the end of the 6-1/2" wire with the ring terminal. Re-install the flat washer, lock washer and

wing nut. Tighten the wing nut firmly. Do not over tighten. Pliers are not needed.

Loosen the red binding post on the MFJ-927 tuner by turning it counter-clockwise. There is a small

hole in the binding post's center that the "TUNER" wire gets inserted. Insert the wire so it goes

completely through the binding post, but not far enough to have the wire insulation interfere with

the post. Once in place firmly tighten the binding post to capture the "TUNER" wire.

Figure 9 - Wire from "TUNER" to Red Binding Post on MFJ-927 Tuner

- 9 -

Site Selection

Select a mounting location for the DXE-ATSA-1 clear from power lines, structures and other

antennas. Consider overhead power lines, utility cables and wires.

The vertical wire element 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.

Adequate space should be available for the radial wires which will extend out from the DXE-

ATSA-1 in a 25 foot radius.

When installing the unit, the four ground spikes must be pushed into the

soil to provide a good RF ground.

If your soil is not a good RF ground (sandy, real hard dirt, etc.),

adding a customer supplied ground rod which is installed near the

DXE-ATSA-1 and connected to the DXE-ATSA-1 at one of the radial

wire connection points will help provide a good RF ground.

Refer to Figure 17 for examples of installation sites.

Coaxial Cable Installation

The customer supplied coaxial cable should be run from the operating position (radio room) to the

base of the DXE-ATSA-1. Ideally, the coaxial cable is buried below the soon to be installed radial

field. This will help prevent RF currents being fed back into the coaxial cable by the radial wires.

The coaxial cable is connected to the MFJ-927 tuner using the supplied right angle UHF connector

previously installed on the "TRANSMITTER" SO-239 connector as shown in Figure 10.

Figure 10

Once the coaxial cable is installed, use the optional DXE-3M21553M Temflex and TRM-06132

tape to weatherproof the connections.

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