The KXV3 Interface provides a separate receive antenna input and output, inputs and outputs for use with an external transverter, and a buffered i.f. output. Complete details for using the KXV3 are included in the K3 Owner’s manual. This manual covers the installation of the KXV3 Interface option in your K3 transceiver.
How ESD Damage Occurs Whenever an object containing a static charge touches a circuit in your K3, current will rush into the circuit until the components reach the same voltage as the source of the static charge. If the voltage or current that passes through a component during that brief period exceeds its normal operating specifications, it may be damaged or destroyed.
• If you choose to use a soldering iron to work on your K3 for any reason, be sure your iron has an ESD- safe grounded tip tied to the same common ground used by your mat or wrist strap.
Parts Included The following parts should be included in your kit. Check to ensure you have them all. If any parts are damaged or missing, contact Elecraft for replacements (see Customer Service and Support, page 3). ELECRAFT ILLUSTRATION DESCRIPTION QTY.
HOLDING TOP COVER. Figure 1. Removing K3 Top Cover. CAUTION: Touch an unpainted metal ground or wear a grounded wrist strap before touching components or circuit boards inside the K3. See Preventing ESD Damage on page 4 for more information.
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Remove the four jack screw nuts with their lock washers and the two black pan head screws from the KIO3 rear panel as shown in Figure 2. REMOVE THE FOUR JACK SCREW NUTS AND LOCK WASHERS REMOVE 4-40 SCREW REMOVE 4-40 SCREW SPACE RESERVED FOR KXV3 MODULE...
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Do not cut nearby jumpers W20 or W21! It is not necessary or desirable to unsolder the jumpers. Simply cut them with your diagonal cutters, taking care not to lose the bits of the jumper wire inside the K3, but be sure to cut the ends short.
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Inspect the white connector at the end of the TMP cable. The side nearest the connector holes must be smooth and flat. Use your diagonal cutters or a hobby knife to cut away any bumps or ridges (see Figure 6 ). TRIM AWAY ANY RIDGES OR BUMPS TO PROVIDE A FLAT, SMOOTH SURFACE...
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As you install components and reassemble your K3, be sure all the screws are in place and secure, but do not over tighten them. Failure to tighten all screws may result in poor shielding of sensitive components, resulting in possible noise or birdies in the receiver as well as other difficult-to-trace problems.
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SPECIAL NOTE TO KIT BUILDERS: If you were directed here to install your KXV3 module as part of the overall kit assembly, installation of the KXV3 module is complete. Return to the K3 Kit Assembly Manual where you left off.
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Figure 11. Check KIO3 Audio I/O Board Mating. Replace the KIO3 Main Board with the Audio I/O daughter board attached in the K3 as shown in Figure 12. The Audio I/O board fits just over the KXV3 board assembly and the TMP cable passes through the space between the edge of the KXV3 board and the KIO3 board.
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Figure 15. Connecting 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.