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ELECRAFT K3S Installation Instructions Manual

High-performance 160-6 meter transceiver
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Download this manual See also: Owner's Manual
E
K3
S
LECRAFT
H
-P
IGH
ERFORMANCE
160 – 6 M
T
ETER
RANSCEIVER
KBPF3A G
C
R
O
ENERAL
OVERAGE
ECEIVE
PTION
I
I
NSTALLATION
NSTRUCTIONS
Rev A1, July 2, 2015
Copyright © 2015, Elecraft, Inc.
All Rights Reserved
E740265

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  • Page 1  LECRAFT ERFORMANCE 160 – 6 M ETER RANSCEIVER KBPF3A G ENERAL OVERAGE ECEIVE PTION NSTALLATION NSTRUCTIONS Rev A1, July 2, 2015 Copyright © 2015, Elecraft, Inc. All Rights Reserved E740265...

  • Page 2: Table Of Contents

    Tools Required ..............................17  Installation in the KRX3 Sub Receiver ......................18  Installation in the K3 Main Receiver ........................ 19  Appendix B Checking Synthesizer Type in K3 Transceivers ............... 22   Elecraft manuals with color images may be downloaded from www.elecraft.com.

  • Page 3: Introduction

    Repair / Alignment Service (We want to make sure everyone succeeds!) If necessary, you may return your Elecraft product to us for repair or alignment. (Note: We offer unlimited email and phone support to get your kit running, so please try that route first as we can usually help you find the problem quickly.)

  • Page 4: Preventing Electrostatic Discharge Damage

    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 5: Choosing An Anti-Static Mat

    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.

  • Page 6: Parts Included

    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.

  • Page 7: Removing The K144Xv 2-Meter Module

    Figure 2 and lift the top cover off of the module. Note: Some units may have a sixth screw in the hole near the Elecraft name on the top cover that must be removed. Figure 2. Removing the K144XV 2 Meter Module.

  • Page 8: Removing The Krx3 Or Krx3A Sub Receiver Module

    Remove the three 6-32 screws that secure the K144XV module to the side panel. Hold the module to keep it from falling if the KRX3 sub receiver is not installed. Lift the module out, set the top cover on it to protect it, and set it aside in a safe place.

  • Page 9: Installing The Kbpf3A In The Sub Receiver

    Hold the KRX3 or KRX3Asubreceiver 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 sub receiver module. There are two along the front. There may be one at the back as well, depending upon the options installed. As you lift the sub receiver module, it will unplug from two small interface circuit boards.

  • Page 10: Installing Standoffs On The Sub Receiver Board

    Check to see if the standoffs are already mounted on the sub receiver at the locations shown in Figure 6. if so, go directly to Installing the KBPF3A on the Sub Receiver Board on page 11 Otherwise continue with Installing Standoffs on the Sub Receiver Board below. Figure 6.

  • Page 11: Installing The Kbpf3A On The Sub Receiver Board

    Place the sub receiver main circuit board in the bottom shield so that the 1-1/2” screws extend through holes E7 and E13 on the board. Press the main circuit board down against the standoffs. The board will “snap” into position in the enclosure as the small bumps along the edges of the board slip into the holes in the sides of the shield.

  • Page 12: Installing The Kbpf3A In The Main Receiver

    If you removed them, place the 7/8” (22 mm) unthreaded sleeves over the long screws so they rest against the top of the circuit board (see Figure 6). Place the top shield over the assembly and adjust its position so the edge of the top fits inside the bottom and rests against the sub receiver main board on all sides.
  • Page 13 Remove both bottom covers from the K3 or K3 by removing the screws shown in Figure 11. Figure 11. Removing K3 / K3 Bottom Cover. Install two 1/2” (13 mm) standoffs on the RF board as shown Figure 12.Use the hardware exactly as shown. The lock washer between the standoff and the pc board is very important to establish the correct height above the board.

  • Page 14: Installing The Kbpf3A Board On The Rf Board

    Installing the KBPF3A Board on the RF Board There are three connectors on the bottom of the KBPF3A board that must be properly mated to P44A, P44C and P44E on the RF board (see Figure 13). Even though the connectors may be hard to see as they are mated, especially if the amplifier shield is installed, they can be aligned as follows: Set the KBPF3A board in place over the standoffs, aligning it so the holes in the board are aligned with the screw holes in the tops of the standoffs.

  • Page 15: Reassembly

    Reassembly If your K3 /K3 is equipped with the sub receiver, turn to your KRX3A Sub Receiver Installation and Operation manual, Installing the KRX3A Sub Receiver Module section to replace the KRX3A module. Be especially careful to do the following as described in that procedure: If you have a K3 (not a K3 ), be sure the cover on battery BT1 on the RF board is in place.

  • Page 16: Enable The Kbpf3A Module

    Hold the top cover above the K3 / K3, route the speaker wire under the stiffener bar and plug it into P25 on the KIO3 or KIO3B board at the left rear of the chassis as shown in Figure 15. Figure 15.

  • Page 17: Appendix A Modification Required For K3 And Krx3 Receivers

    Digikey (part number 493-4026-1-ND), Mouser Electronics (part number 647-RL81C221MDN1KX) or Newark (part number 79R3109). If necessary it may be obtained from Elecraft (part number E530625). DO NOT SUBSTITUTE A COMMON ELECTROLYTIC CAPACITOR The aluminum polymer type specified is required to obtain the bypass performance required for optimum receiver performance.

  • Page 18: Installation In The Krx3 Sub Receiver

    Installation in the KRX3 Sub Receiver You need to make this modification only if you are installing the KBPF3A board in a KRX3 sub receiver. After opening the sub receiver enclosure (see Figure 9, page 11) check to see if the modification has been made before.

  • Page 19: Installation In The K3 Main Receiver

    Observe polarity when installing the capacitor. Unlike older electrolytic capacitors, the negative lead on the solid polymer electrolytic capacitor is marked with red instead of black. Figure A- 2. Mounting the Poly Capacitor on the KRX3 Main Board. Replace the KNB3 module and secure it with the screw and lock washer. Use the split ring lock washer you removed.
  • Page 20 Figure A- 3. Poly Capacitor Location on K3 RF Board. To install the capacitor, remove the KNB3 Noise Blanker module. Remove the screw and lock washer and then unplug the KNB3 from the K3 RF board. Remove the K3 bottom cover(s) as described under Installing the Standoffs on the RF Board on page 12. If you do not need to install the standoffs for the KBPF3A board, remove only the section of the bottom cover closest to the front panel.
  • Page 21 Observe polarity when installing the capacitor. Unlike older electrolytic capacitors, the negative lead on the solid polymer electrolytic capacitor is marked with red instead of black. Figure A- 4. Mounting the Poly Capacitor on the K3 RF Board. Replace the KNB3 module and secure it with the screw and lock washer. Use the split ring lock washer you removed.

  • Page 22: Appendix B Checking Synthesizer Type In K3 Transceivers

    Appendix B Checking Synthesizer Type in K3 Transceivers This applies ONLY to K3 transceivers. All K3S transceivers are equipped with the newer KSYN3A synthesizers . The location of the synthesizer(s) inside the K3 is shown below. The original KSYN3 synthesizers are shown.

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