ELECRAFT K3 Installing

Rxa board

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I n s t a l l i n g t h e K X V 3 R X A B o a r d

The KXV3 RXA Board mounts on the KXV3 board assembly using double-sticky tape. Electrical connections are

made by soldering wires to existing terminals.

Contents

The RXA board is supplied with the mounting tape and wires already attached.

Tools Needed

1. Temperature-controlled ESD-safe soldering station with 700 to 800F tip (370-430C).

2. IC-grade, small-diameter (.031") solder (Kester #44 or equivalent).

DO NOT use acid-core solder, water-soluble flux solder, additional flux or solvents of any kind. Use of

any of these will void your warranty.

3. #0 and #1 size Phillips screwdrivers. Use the screwdriver that best fits the screw in each step.

4. Soft cloth or other surface to lay cabinet panels on to avoid scratching. A clean static-dissipating mat is

ideal (see below). If using cloth, do not lay circuit boards on it.

5. Pliers or wrenches for removing the 3/16" (4.8 mm) rear panel jack screw nuts and 1/4" (6.4 mm) #4 nuts.

6. Long nose pliers.

7. Diagonal cutters.

The following tools are strongly recommended:

1. ESD wrist strap.

2. Static dissipating work mat.

Installation Procedure

Disconnect power and all cables from your K3.

Remove the top cover as shown in Figure 1. After the cover is open, lift it gently to reach the speaker wire

connector. Unplug the speaker then set the top cover aside in a safe place.

Elecraft  www.elecraft.com

LECRAFT

Revision B, November 28, 2008

Figure 1. Removing the Top Cover

P.O. Box 69  Aptos, CA 95001-0069



(831) 662-8345  Fax: (831) 662-0830

Page 1 2. Static dissipating work mat. Installation Procedure Disconnect power and all cables from your K3. Remove the top cover as shown in Figure 1. After the cover is open, lift it gently to reach the speaker wire connector. Unplug the speaker then set the top cover aside in a safe place.
Page 2 Remove the two black pan head screws from the KIO3 rear panel as shown in Figure 2. Figure 2. Removing the KIO3 Rear Panel. Remove the KIO3 main board as shown in Figure 3. CAUTION: The pc boards are ESD sensitive. Put them in a safe place until you reinstall them. Figure 3.
Page 3 If you do not have the KRX3 subreceiver installed, skip this step. If you do have the KRX3 subrecever installed, stand the K3 on its side feet and remove the left side cover as shown in Figure 4. Figure 4. Removing the Left Side Cover.
Page 4 Replace the coaxial connector into J87 in the KXV3 board. Note that P66 does not fully engage the connector in the K3 RF board. A portion of the pins are visible above the connector when the board is in the correct position.
Page 5 Figure 7. Connecting the Speaker Cable. Position the top cover on the K3. Note that the tab on the back center goes under the rear lip of the K3 rear panel. Secure the top cover with the nine 4-40 3/16” (4.8 mm) black flat head screws you removed earlier (see Figure 1).

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