DX Engineering DXE-SA80-AOK User manual

80 Meter Tuning Coil Add-On Kit
for the DXE-ATSA-1
Auto Tuned Multi-Band HF
Stealth Antenna System
DXE-SA80-AOK
DXE-SA80-AOK-INS Revision 0f
DXE-SA80-AOK shown installed on the DXE-ATSA-1
DX Engineering 2017
1200 Southeast Ave. - Tallmadge, OH 44278
Phone: [phone] ∙ Tech Support and International: [phone]
Fax: [phone] ∙ E-mail: [e-mail]

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80 meter Tuning Coil - DXE-SA80-AOK
The DXE-SA80-AOK 80 meter coil add-on kit is custom designed for use with the DXE-ATSA-1
antenna system. In some ATSA antenna installations with excellent radial systems, achieving the
best SWR on a vertical element for 80 meters may be difficult without some means of adjusting
feedpoint impedance.
The DXE-SA80-AOK allows easy adjustment for lowest SWR. The DXE-SA80-AOK will aid in
tuning a low impedance antenna to the minimum SWR in the customer selected portion of the 80
meter band without affecting operation on the other, higher frequency bands. The #12 AWG coil
wire is tin-nickel plated for high power handling, corrosion resistance, ease of soldering and long
term reliability.
Parts List for the DXE-SA80-AOK
Quantity
Description
1
DX Engineering custom variable inductor coil for 80 meters for use on the DXE-ATSA-1
with Machined "L" Bracket, connection wire and ring terminal attached
1
Machined Insulated Mounting Bracket
2
10-24 Stainless Steel Nyloc Nut
2
10-24 x 1" Stainless Steel Hex Head Bolt
3
#10 Stainless Steel External Tooth Washer
4
#10 Stainless Steel Flat Washer
1
#10 Stainless Steel Hex Nut
Installing the Optional 80 meter Tuning Coil - DXE-SA80-AOK
The DXE-SA80-AOK 80 meter coil add-on kit is custom designed for use with the ATSA antenna
system. In some ATSA antenna installations with excellent radial systems, achieving the best SWR
on a vertical element for 80 meters may be difficult
without some means of adjusting feedpoint impedance.
The DXE-SA80-AOK allows easy adjustment for
lowest SWR. The DXE-SA80-AOK will aid in tuning
a low impedance antenna to the minimum SWR in the
customer selected portion of the 80 meter band without
affecting operation on the other, higher frequency bands.
The #12 AWG coil wire is tin-nickel plated for high
power handling, corrosion resistance, ease of soldering
and long term reliability.
Refer to the shelf hole layout drawing in Figure 1.
There is one radial wire mounting hole used to mount Figure 1
the DXE-SA80-AOK. Remove the existing radial wire
and hardware. Move the removed radial wire to the

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next radial mounting hole and connect it there (double up on one radial mounting hole). Mount the
insulated coil mounting bracket to the "L" bracket on the coil assembly using the hex head bolt, two
flat washers, star washer and Nyloc nut as shown in Figure 2. When installing stainless steel
hardware, it is suggested that UMI-81343, UMI-81464, DXE-NSBT8 or DXE-NMBT8 - Never-
Seez or Anti-Seize be used to prevent thread galling on stainless steel.
Figure 2
Install the coil assembly to the mounting shelf using the hex bolt, two flat washers, one external
tooth washer and Nyloc hex nut as shown in Figure 3.
Figure 3
The wire with ring terminals goes from the end of the coil to the MatchBoxx™ "ANT" connection
as shown in Figure 4.
Figure 4
The end of the 45 foot vertical antenna element is routed through previously mounted insulator to
the coil insulator. The wire then goes through the large hole on the coil insulated bracket to the end
of the coil (end where the "L" bracket is attached) and is held in place with one external tooth
washer and stainless steel hex nut as shown in Figure 5.

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Figure 5
The DXE-ATSA-1 manual has additional information about the ATSA-1 and the SA80-AOK.
Tuning the DXE-SA80-AOK
The coil is shipped with the tap set at the third turn in the coil. This setting should be the correct
position for most installations. Perform on-air tuning in the 80 meter band. Adjustments to the coil
tap may be made by moving the tap one turn at a time, and the re-test the tuning. Once a satisfactory
(low SWR, easy to tune) setting is made, the coil tap may be soldered in place on the coil. Soldering
the tap in place on the coil will ensure that over time, the coil setting will remain solid and
environmental issues (dust, dirt, dirty air) will not affect the setting.
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:
[email protected]
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 replace any item or part thereof which is
proved to be other 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 claimed to be defective in
material or workmanship, DX Engineering shall, upon prompt notice thereof, issue shipping instructions for return to DX Engineering (transportation-
charges prepaid by Buyer). Every such claim for breach of these warranties shall be deemed to be waived by Buyer unless made in writing. The above
warranties 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 foregoing warranties are limited to the precise terms thereof. 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 STRICTLY
IN ACCORDANCE WITH THE FOREGOING.
©DX Engineering 2017
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Specifications subject to change without notice.