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ELECRAFT K3S Installation Instructions Manual

High-performance 160 – 6 meter transceiver kpa3a 100-watt amplifier option
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Download this manual See also: Owner's Manual, Instruction and Installation Manual
E
K3
S
LECRAFT
H
-P
IGH
ERFORMANCE
160 – 6 M
T
ETER
RANSCEIVER
KPA3A 100-W
A
O
ATT
MPLIFIER
PTION
I
I
NSTALLATION
NSTRUCTIONS
Rev A, June 2, 2015
Copyright © 2015, Elecraft, Inc.
All Rights Reserved
E740267

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  • Page 1  LECRAFT ERFORMANCE 160 – 6 M ETER RANSCEIVER KPA3A 100-W MPLIFIER PTION NSTALLATION NSTRUCTIONS Rev A, June 2, 2015 Copyright © 2015, Elecraft, Inc. All Rights Reserved E740267...

  • Page 2: Table Of Contents

    Replacing the Covers ............................19  Configuring and Calibrating the KPA3A ......................20  Circuit Description ..........................21   KPAIO3A ................................21  KPA3A Fan Panel ............................. 21  KPA3A Power Amplifier ..........................21  Elecraft manuals with color images may be downloaded from www.elecraft.com.

  • Page 3: Introduction

    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 to Elecraft at time of order to insure warranty coverage.

  • Page 4: Preventing Electrostatic Discharge Damage

    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.

  • Page 5: Preparing For Installation

    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). CAUTION In addition to taking ESD precautions, be careful not to damage components on either side of the circuit boards when handling them.
  • Page 6 ELECRAFT ILLUSTRATION DESCRIPTION QTY. PART NO. Fan with short lead E850293 Fan with long lead E850294 Finger Guard E980143 Circuit Breaker, 20A E980128 Rear Shield E100217 Screw, 4-40, 1/4” (6.4 mm) Zinc, Pan E700005 Head Screw, 4-40, 1/4” (6.4 mm) Black, Pan...

  • Page 7: Installation Procedure

    Installation Procedure /K3 KIT BUILDERS: If you were directed here to install the KPA3A module as part of the initial assembly, begin here to complete the installation. Skip over the steps indicated. Disconnect power and all cables from your K3 /K3.
  • Page 8 CAUTION: Touch an unpainted metal ground or wear a grounded wrist strap before touching components or circuit boards inside the K3 /K3. See Preventing Electrostatic Discharge Damage on page 4 for more information. On the rear of the K3 /K3, remove the large blank panel above the screw.

  • Page 9: Removing The Krx3A/Krx3 Sub Receiver Module

    /K3 KIT BUILDERS: If you are installing the KPA3A as part of the initial K3 /K3 kit assembly, skip the following steps and resume with Installing the KPAIO3A Interface Module on page 12 Remove the stiffener bar that runs from side to side across the top of the chassis. This is the bar the center three screws in the top cover thread into.

  • Page 10: Removing The Knb3 Module

    Hold the sub receiver module by the two brass knurled nuts on the top, and lift it straight up to gain access to the small TMP coaxial connectors plugged into the module. There are two along the front. There may be one at the back as well, depending upon the options installed.

  • Page 11: Installing The Kpa3A Shield

    Installing the KPA3A Shield Remove the three screws, washers and standoffs (on the bottom of the RF) board shown in Figure 6. Save the lock washers and standoffs. The screws will not be reused. Figure 6. Rear Shield Mounting Screw Locations. Set the rear shield in place as shown in Figure 7.

  • Page 12: Installing The Kpaio3A Interface Module

    Place a black 4-40 3/8” (9.5 mm) flat head screw through the hole in the back panel and the tab at the top edge of the shield as shown in Figure 8. Secure it with a #4 inside tooth lock washer and 4-40 nut. Figure 8.
  • Page 13 On the KPAI03A board, install a 5/16” (7.9 mm) 4-40 standoff near K1 as shown in Figure 10. Use the exact hardware shown. This is important so that the height of the standoff is correct when it is mounted in the /K3.

  • Page 14: Assembling The Fan Panel

    Assembling the Fan Panel Locate the fan panel and mount the fans as shown in Figures 12 and 13 using 4-40 7/8” black flat head screws and acorn nuts. Note that the appearance of the fans in your kit may differ slightly from those shown. 1.
  • Page 15 Position the fan panel near the rear opening and plug the fan leads into the connectors in the upper right corner of the KPAIO3 board as shown in Figure 14. Be sure to orient the connectors so the red lead is to the left as indicated on the board.

  • Page 16: Installing The Kpa3A Amplifier Module

    Installing the KPA3A Amplifier Module Your KPA3A module may produce a rattling sound when shaken. This is normal. It is caused by ferrite beads sliding along wire leads in the module. Place the KPA3A module inside the shield from the top. Mate the two connectors fully with the KPAIO3A board as shown in Figure 15.
  • Page 17 Position the fan panel you assembled earlier behind the opening at the rear of the K3 /K3 and connect the leads as shown in Figure 16. Figure 16. Connecting Fan Panel. Mount the fan panel on the K3 /K3 using four 3/16” (4.8 mm) black pan head screws as shown in Figure 17.

  • Page 18: Replacing The Knb3 Module

    Dress the fan leads so they are well clear of the fan blades. Check to ensure both fans turn freely. Figure 18. Positioning the Fan Leads. /K3 KIT BUILDERS: Skip the following steps. Resume with Replacing the Covers on page 19. Replacing the KNB3 Module Replace the standoff and the KNB3 module you removed earlier (see Figure 5).

  • Page 19: Replacing The Covers

    Replacing the Covers REPLACE ALL THE SCREWS! The K3 /K3 chassis has excellent rigidity despite its light weight. The screws that hold the top cover in place are an important part of the structural design. Please be sure to replace all the screws and verify they are tight whenever you replace the cover or other panels Replace the bottom cover(s) using the 4-40 black pan head screws you removed earlier.

  • Page 20: Configuring And Calibrating The Kpa3A

    If you have a Windows, Linux or Macintosh computer with an RS232 interface and cable, and an internet connection, perform the automated TX Gain calibration using the K3 Utility program as follows: Ensure you have the Elecraft K3 Utility Ver. 1.1.12.28 or later on your computer. The utility is available for downloading from the Elecraft web site: www.elecraft.com...

  • Page 21: Circuit Description

    Circuit Description The KPA3A option consists of three subassemblies: the KPA3A power amplifier, a fan panel to provide cooling, and the KPAIO3A interface module. KPAIO3A The KPAIO3A acts as an interface between the RF board and the KPA3A power amplifier. It includes a relay that allows the KPA3A to be bypassed when it is not needed during low power operation.

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