ELECRAFT KXAT1 Instructions d'exploitation

1ELECRAFT KXAT1 AUTOMATIC ANTENNA TUNERAssembly and Operating InstructionsRevision A, Oct. 14, 2003. Copyright © 2003, Elecraft; All Rights ReservedIn

10Backpacking Verticals: The KXAT1 may improve the match to a backpacking-style vertical. If theantenna has a loading coil, you should first adjust it

11TroubleshootingIf the ATU menu parameter shows "-- - " at all times, look for a connector shifted by one position, anunsoldered pin, U1 in

Elecraft • www.elecraft.com • 831-662-8345Circuit DetailsThe ATU uses three inductors and three capacitors in an L-network, with val

2Parts Inventory The table below lists all parts in the kit. The KX1 Owner's manual has photographs of similar parts.Ref.DescriptionQtyPart No.C1

3Assemblyi A fine-point, temperature-controlled soldering iron (700-800 degrees F) is required to assemblethis kit. A high-wattage iron or one with a

4 Fold down C1, C2, and C3 at about a 45-degree angle, but not so far that they contact the nearby relaypins. C1 should be folded toward K1, C2 toward

5 Install L1 vertically on the PC board as shown by its component outline, then pull the leads taut onthe bottom of the board. Trim and solder the lea

6 Tin T1's leads with solder. If the leads do not tin easily, the insulation may not be fully removed. Using an ohmmeter, measure between the red

7Alignment and Test Connect a power supply or battery to the KX1 and turn on power. Tap M E N U and scroll through the entries until you find A T U .

8Using The ATUBasic ATU Operation• Connect the best possible antenna and ground to the KX1 (see Antenna Considerations).• Use the KX1 menu to set the

9Antenna ConsiderationsThe KXAT1 will work with coax-fed dipoles, verticals, etc., but it's optimized for use with random-lengthwire antennas. Th