Elecraft KXAT100 User Manual
ELECRAFT
KXAT100
100 Watt AUTOMATIC ANTENNA TUNER
INSTALLATION INSTRUCTIONS
Revision A, January 6, 2014
Copyright © 2014, Elecraft, Inc.
All Rights Reserved
Contents
Introduction ............................................................................................................................................... 3
Customer Service and Support ................................................................................................................. 3
Tools Required for Assembly ................................................................................................................... 4
Preventing Electrostatic Discharge Damage ............................................................................................ 5
Choosing an Anti-Static Mat ............................................................................................................................... 5
Unpacking and Inventory ......................................................................................................................... 6
KXAT100 Core Assembly Box E850594 ........................................................................................................... 6
Assembly Procedure ................................................................................................................................. 7
Appendix A Illustrated Parts List…..................................................................................................... A1
i
Elecraft manuals with color images may be downloaded from
www.elecraft.com
.
Introduction
This manual will guide you through the installation of a KXAT100 antenna tuning unit (ATU) into your
assembled KXAT100 amplifier.
The KXAT100 antenna tuning unit (ATU) fits inside the KXPA100 enclosure.
We’re confident that you’ll find the installation an easy process. The KXAT100 consists of a single fullyassembled printed circuit board. Only a few hand tools are needed to assemble your kit (see page Tools
Required for Assembly on page 4).
The KXAT100 printed circuit board is shipped in ESD-safe bubble wrap. Do not handle
it without first taking the ESD precautions listed on page 5.
Should you have difficulty, you'll have our full support via phone and e-mail. In addition, we hope you'll join
our growing and enthusiastic community of owner/builders via the Elecraft reflector.
Complete operating instructions for the KXAT100 can be found in the Owner’s Manual.
Customer Service and Support
Technical Assistance
You can send e-mail to kx3support@elecraft.com and we will respond quickly – typically the same day
Monday through Friday. If you need replacement parts, send an e-mail to parts@elecraft.com
assistance is available from 9 A.M. to 5 P.M. Pacific time (weekdays only) at 831-763-4211. Please use e-mail
rather than calling when possible since this gives us a written record of the details of your problem and allows us
to handle a larger number of requests each day.
. Telephone
Repair / Alignment Service
If necessary, you may return your Elecraft product to us for repair or alignment. (Note: We offer unlimited email
and phone support, so please try that route first as we can usually help you find the problem quickly.)
IMPORTANT: You must contact Elecraft before mailing your product to obtain authorization for the
return, what address to ship it to and current information on repair fees and turnaround times. (Frequently we
can determine the cause of your problem and save you the trouble of shipping it back to us.) Our repair location
is different from our factory location in Aptos. We will give you the address to ship your kit to at the time of
repair authorization. Packages shipped to Aptos without authorization will incur an additional shipping charge
for reshipment from Aptos to our repair depot
.
3
Elecraft 1-Year Limited Warranty
This warranty is effective as of the date of first consumer purchase (or if shipped from the factory, the date
the product is shipped to the customer). It covers both our kits and fully assembled products. For kits,
before requesting warranty service, you should fully complete the assembly, carefully following all
instructions in the manual.
Who is covered: This warranty covers the original owner of the Elecraft product as disclosed to Elecraft
at the time of order. Elecraft products transferred by the purchaser to a third party, either by sale, gift, or
other method, who is not disclosed to Elecraft at the time of original order, are not covered by this
warranty. If the Elecraft product is being bought indirectly for a third party, the third party’s name and
address must be provided at time of order to ensure warranty coverage.
What is covered: During the first year after date of purchase, Elecraft will replace defective or missing
parts free of charge (post-paid). We will also correct any malfunction to kits or assembled units caused by
defective parts and materials. Purchaser pays inbound shipping to us for warranty repair; we pay shipping
to return the repaired equipment to you by UPS ground service or equivalent to the continental USA and
Canada. For Alaska, Hawaii, and other destinations outside the U.S. and Canada, actual return shipping
cost is paid by the owner.
What is not covered: This warranty does not cover correction of kit assembly errors. It also does not
cover misalignment; repair of damage caused by misuse, negligence, battery leakage or corrosion, or
builder modifications; or any performance malfunctions involving non-Elecraft accessory equipment. The
use of acid-core solder, water-soluble flux solder, or any corrosive or conductive flux or solvent will void
this warranty in its entirety. Also not covered is reimbursement for loss of use, inconvenience, customer
assembly or alignment time, or cost of unauthorized service.
Limitation of incidental or consequential damages: This warranty does not extend to non-Elecraft
equipment or components used in conjunction with our products. Any such repair or replacement is the
responsibility of the customer. Elecraft will not be liable for any special, indirect, incidental or
consequential damages, including but not limited to any loss of business or profits.
Tools Required for Assembly
1. ESD Protection (see Preventing Electrostatic Discharge Damage, pg 5)
2. #0 and #1 size Phillips screwdrivers. To avoid damaging screws and nuts, a power screwdriver is not
recommended. Always use the screwdriver that best fits the screw in each step.
3. Needle-nose pliers, 4” to 6” is ideal.
4. Soft cloth or clean, soft static dissipating pad to lay cabinet panels on to avoid scratching.
4
Preventing Electrostatic Discharge Damage
Sensitive components may be damaged by Electrostatic Discharge (ESD) simply by touching them or a circuit
board containing them unless you take specific steps to prevent such damage. Damage may occur with static
discharges far too little for you to notice.
A damaged component may not fail completely at first. Instead, the damage may result in below-normal
performance for an extended period of time before you experience a total failure.
Parts which are especially ESD-sensitive are identified in the parts list and in the assembly procedures.
We strongly recommend you take the following anti-static precautions (listed in order of importance) to ensure
there is no voltage difference between the components and any object that touches them:
Leave ESD-sensitive parts in their anti-static packaging until you install them. The packaging may be a
special plastic bag that allow static charges to flow harmlessly over their surface, or a component’s
leads may be inserted in conductive foam that keep them at the same potential.
Wear a conductive wrist strap with a series 1-megohm resistor that will constantly drain off any static
charge that accumulates on your body. If you do not have a wrist strap, touch a ground briefly before
touching any sensitive parts to discharge your body. Do this frequently while you are working. You can
collect a destructive static charge on your body just sitting at the work bench.
WARNING
DO NOT attach a ground directly to yourself without a current-limiting resistor as this poses a
serious shock hazard. A wrist strap must include a 1-megohm resistor to limit the current flow. If
you choose to touch an unpainted, metal ground to discharge yourself, do it only when you are
not touching live circuits with any part of your body.
Use a grounded anti-static mat on your work bench (see below).
If you pick up a pc (printed circuit) board that was not placed on an anti-static mat or in an anti-static
package, first touch a ground plane connection on the board such as a connector shell or mounting
point.
If you use a soldering iron to work on a circuit board, be sure your iron has an ESD-safe grounded tip
tied to the same common ground used by your mat and wrist strap.
Choosing an Anti-Static Mat
An anti-static mat must bleed off any charge that comes in contact with it at a rate slow enough to avoid a shock
or short circuit hazard but fast enough to ensure dangerous charges cannot accumulate. Typically, a mat will
have a resistance of up to 1 Gigaohm (10
recommend that you choose an anti-static mat that comes with published resistance specifications and clean it as
recommended by the manufacturer. Testing has shown that many inexpensive mats that do not specify their
resistance have resistance values much too high to provide adequate protection, even after they were cleaned
and treated with special anti-static mat solutions.
Suitable anti-static table mats are available from many sources including:
U-line (Model 12743 specified at 10
Desco (Model 66164, specified at 10
3M
TM
Portable Service Kit (Model 8505 or 8507, specified at 106 to 109 ohms)
9
ohms). Testing a mat requires specialized equipment, so we
7
ohms)
6
to 108 ohms)
5
Unpacking and Inventory
CAUTION
Do not handle the circuit board or touch components and boards inside the KXPA100
without anti-static protection! Doing so may damage sensitive components. See Preventing
Electrostatic Discharge Damage on page 5 for important information.
Before starting, check to be sure that you have the parts listed below.
KXAT100 Core Assembly Box E850594
ILLUSTRATION DESCRIPTION QTY.
KXPA100 ATU PCB Assy 1 E850572
ELECRAFT
PART NO.
KXPA100 Front Panel for ATU 1 E850596
KXPA100 SO239 TMP Cable 4” Envelope E850584
ILLUSTRATION DESCRIPTION QTY.
SO259 Connector with 4” (10.2 cm)
cable and TMP connector
Screw, Pan Head, Black 4-40,
5/16” (7.9 mm)
Nut, 4-40 with captive star washer 4 E700191
(Continued on next page)
ELECRAFT
PART NO.
1 E850600
4 E700294
6
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