Spare Parts and Mod Kits

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If you need parts not listed on this order form, or have suggestions for parts to add, please email parts@elecraft.com . Please include the Elecraft part number if possible.

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KX3 Parts and Mod Kits

Part Number

Description

Price

 
KX3HSMDKT KX3 Heatsink Upgrade Kit.
Started shipping with S/N 7292 for kits, S/N 7255 for factory assembled
39.95
KX3VFOMDKT Replacement KX3 VFO A ball bearing encoder.
  KX3 VFO Encoder FAQ
64.95
KXPD3MDKT Upgrade Kit for the KXPD3
  (For KXPD3s shipped before September 2012)

The upgrade kit contains two replacement springs of differing tension, a new set of screw-in contacts with rounded tips and a new set of stainless steel stationary contacts.

0.00
KX3BNCMDKT Upgraded BNC connector for KX3. (User installed)  Includes an integral VHF/UHF filter to reduce the possibility of weak signal interference to very close by VHF/UHF radios, HTs etc.  Not required for normal KX3 operation.

If you would like your KX3 upgraded by Elecraft, you will need to obtain a RMA number. (Email ) A $50.00 factory installation fee will also apply.

This change is included with all new factory assembled KX3s with a serial number higher than 2406.
It is included with all new KX3 kits with a serial number higher than 2492.

49.00

 

K3 Parts and Mod Kits       Please see our K3 Enhancements and Application Notes Page for details, dates and serial numbers.

Part Number

Description

Price

 

KBPF3MDKT

This modification kit applies to the KBPF3, K3 RF board, and optionally to the KRX3 sub receiver. It allows the K3 or K3S to receive signals in the 100-500 kHz range with good sensitivity.

KBPF3 Modification Instructions  

Here are the requirements to receive signals in this range:

1. KSYN3A synthesizer. (The K3S comes with with the KSYN3A standard; it is available as an upgrade for the K3.)

2. KBPF3 filter option. This mod kit upgrades the KBPF3 to a KBPF3A, which covers the 100-500 kHz range.

3. KXV3 RF I/O module (any type). A KXV3 is needed because signals in the 100-500 kHz range can only be copied with the antenna contacted to RX ANT IN or XVTR IN. Both of these jacks are located on the KXV3. (Signals in this range are greatly attenuated when received through the normal ANT1/ANT2 path, because the T/R switch includes a 1.5-MHz high-pass filter to protect the transceivers's PIN diodes.)

NOTE ON NUMBER OF MOD KITS NEEDED (1 or 2): This mod kit can be used to upgrade one KBPF3 and either a K3 RF board or a KRX3 sub receiver. If you have two KBPF3As (one for the main receiver and one for the sub receiver), and you wish to use both for 100-500 kHz reception, then you will need two of the mod kits.

NOTE ON SURFACE-MOUNT COMPONENTS: The KBPF3 part of this modification requires the removal of two surface-mount inductors, and the addition of three 0603-sized surface-mount capacitors. Please read the instruction sheet to determine whether you have the right tools and experience to complete the mod. If not, we can perform the modifications for you for a nominal charge.

 

 

8.95
KSYN3AUPG KSYN3A Synthesizer Upgrade Kit for K3, KRX3
Please Check the Shipping Status Page for shipping status due to the overwhelming response to the KSYN3AUPG.

(Note: Synthesizers used for the K3 and the KRX3 must both be the same model. K3's with the KRX3 will need to upgrade both (2 total) synthesizers to the KSYN3A.)
  Instructions   FAQ    
 Exploring the World Below 530 Kcs With a K3 by Fred Jensen, K6DGW


(NOTE ON K3 LOW-FREQUENCY (100-500 KHZ) RECEIVE COVERAGE WITH THE KSYN3A INSTALLED:: With a KSYN3A installed, the K3 VFO can be tuned as low as 100 kHz. Sensitivity will be very good in the 600-meter band (470 kHz) if a KBPF3 filter module is installed, and the antenna is connected to either the RX ANT IN or XVTR IN jack on the KXV3 module. However, below 300 kHz, sensitivity starts to decrease quickly, because the K3's receiver was optimized for use on higher bands. Typical sensitivity at 300 kHz will be about -100 dBm. The preamp should be turned off at very low frequencies because it is not useful here; it will only increase noise level. )

The KSYN3A is included on all new K3s shipped starting 1/23/2015, s/n 8801 and later.

The KSYN3A synthesizer module is a completely new design that improves on the original KSYN3 in several ways:

ULTRA-LOW PHASE NOISE
The KSYN3A significantly improves the K3's already excellent RX and TX phase noise at close carrier spacings. This in turn noticeably improves the K3's top performing close spaced Rx dynamic range, yielding even better weak signal detection in the presence of strong signals.

FASTER CW BREAK-IN AND MORE ACCURATE CW ELEMENT TIMING

EXCELLENT MECHANICAL STABILITY
The KSYN3A is virtually immune to both physical vibration and magnetic coupling, and operates over a very wide temperature range.

600-METER COVERAGE
The KSYN3A extends VFO tuning down to 100 kHz, with sensitivity gradually falling off below 450 kHz. Transmit output is as high as 1.0 mW for use with a suitable external amplifier. (Note: 600-m and below operation also requires the KBPF3 and KXV3 options.)


219.95
K3AUDPROTMDKT Even though the K3’s audio output I.C. has internal protection, a small number have failed under extreme conditions such as a dead short across the speaker output. This modification adds a 1-ohm resistance to each speaker output that tests show prevents failure even under these conditions. Some soldering of leaded parts is required to make this modification. Manual

Included with all new K3s shipped after mid May 2013.

 

9.95
K312MDKT Increases the older K3's 12V Aux port current from 500mA to 1A to accommodate the current required by the P3 with P3SVGA board installed. Manual

Included with all new P3SVGAs shipped after 4/18/12.

All new K3s ship with this standard.

 

8.00
K3DSPUPGD Swap out upgrade of your Pre-Rev D assembly DSP boards to a DSP board modified to Rev D.  (Rev D already ships on all new K3s.) Improves low freq RX/TX audio response below 300 Hz, and adds a Low Pass Filter (LPF) that rolls off RX audio above 4 kHz. This is a fully tested and warranted upgraded board based on an exchange DSP. 

Download Manual for Removing/Replacing the DSP Board (1.6 MByte pdf)

Note: The main K3 DSP board handles RX audio amplification for both the main and sub RX.  No change is needed for the AUXDSP board used with the sub-receiver.

IMPORTANT: Your old K3 DSP board must be returned within 2-3 weeks of receipt of the upgrade to avoid being charged for the full DSP board replacement cost.  DSP board must be in working and good cosmetic condition without visible damage. Also, your DSP must be returned in the same anti-static packaging used to ship the upgrade DSP to you and the same or equivalent shipping box and packaging material to insure it is not damaged. Damaged or inoperative return DSPs will not be applicable for credit and the full DSP price will be charged for the replacement.

(How do you know if you already have an assembly Rev C or D DSP? Click here.)  

All new K3s ship with the latest DSP board.

Based on current backlog, there is approximately a 4 week shipping lead time for this swap out.

As an alternative, you can send in your DSP first and we will upgrade it. Typical turn around time is less than one business week, plus shipping. Contact sales@elecraft.com for return authorization if you would like to use this alternate path for the DSP upgrade.


 

109.95
K3DSPLPF Small LPF add on SMD board for earlier K3 DSP boards that adds a Low Pass Filter to roll off RX audio above 4 kHz. This is already included on the K3DSPUPGD (above) and Rev D Assembly DSPs, which are included on all currently shipping K3s.    (DSPLPF Picture - 570 kB)

Download Manual for the DSP LPF Board Installation (1.8 MByte pdf)

(Requires making 2 pcb cuts and soldering the short LPF board connections to the DSP. If you are uncomfortable making this mod, we recommend you get the complete K3DSPUPGD above. )

(How do you know if you already have an assembly Rev C or D DSP? Click here.)


 

39.95
K3STFNR K3 Synthesizer Stiffener Plate Kit   Upgrade for early KSYN3 Synthesizers. Not needed on the new KSYN3a Synthesizer that ships with new K3S and KRX3a products.   Instructions 19.95
K3SSKT Stainless Steel Exterior H/W Kit  Black stainless steel exterior K3 screw, nut and h/w set for use in corrosive environments (marine, extreme humidity etc.) Already included with all K3S radios. 19.95
K3IOBUFFKT K3 I/O Ouptut Buffer Mod Kit  Instructions  Included on all new K3s 5.00
K3VFOFILTERKIT K3 VFO Tuning Noise Filter Kit    Instructions   Included on all new K3s 10.00
K3AFMDKT K3 AF Stage Mod Kit. (Increases line-out max level, Internal speaker amp power filter choke change.)  Included on all new K3s 10.00
CWRTMDKT K3 CW Rise Time Mod Kit  Included on all new K3s shipping only
HAGCMDKT K3 Hardware AGC Threshold Mod Kit  Included on all new K3s shipping only
AFOPMDKT K3 AF Output Mod Kit  Included on all new K3s shipping only
E560002 KPA3 12V Sense Modification (1N4148) Included on all new K3s shipping only

 

K2 PARTS AND MOD KITS
K2VCOSHLDKT K2 VCO Magnetic Field Shield Kit Download Manual 10.00
E850138

K2 Temperature Compensated PLL Reference Upgrade  

This compensation circuit reduces the reference oscillator's temperature coefficient by as much as a factor of 10 for superior frequency stability over temperature.  Instructions

Included with all K2s shipped after 4/25/03. (S/N 3446+)

If your K2 serial number is below 3000, we also strongly recommend installation of the BFO modification kit (BFOMDKT) before the PLL upgrade is installed. (K2s s/n 3000 and up already include the changes to the BFO circuit.) Also, K2 firmware older than 2.00 should be upgraded  (FWK2MCIO) to take maximum advantage of the PLL upgrade. Tuning linearity is much improved with the new F/W.

19.00

BFOMDKT

K2 BFO Toroid & PLL Ref Osc Xtal Upgrade

Included with all new K2s, s/n 3000+

Replaces L33 in the BFO oscillator with a new prewound 41uH toroidal inductor that has a  more temperature stable core. Replaces the two 12.096 crystals in the PLL ref. osc. with a single crystal for better temperature stability.

Improves BFO temperature stability on older K2s (less than s/n 3000.)  Also improves SSB carrier rejection on older K2s that had a solenoidal inductor at L33.

10.00

K2PAKIT

PA Replacement Kit for K2

Includes PA transistors, thermal pads and mounting H/W .

15.00

KSB2MDKT

PSK31 Upgrade for SSB Option.

(Included in all KSB2s shipped since Sept. 2001.) Improves PSK31 TX IMD. See app. note.

5.00

E850006

Matched Filter Crystals (7) for the basic (CW) K2

10.00

K2KSB2XTLS

Matched Filter Crystals (14) 

For existing K2 and KSB2 combinations.

15.00

E850093

10M BPF, VFO/ALC Mod Kit for the K2 

Included with all KPA100 kits and all new K2s, s/n 3000 and above. Improves K2 TX spurious suppression for operation at 100W. See app. note.

10.00

XFILMDKT

2nd Filter Upgrade for the K2.

Improves flatness of K2 SSB RX filter response between USB and LSB. 

Included with all new K2s, s/n 3000 and above. See app. note.

10.00

E740001

K2 Manual

29.00

E980007

Replacement Speaker - K2

5.00
E980001 Battery, 2.9 AH (PS-1229) 

Replacement for KBT2

30.95
E640002 Battery Switch for the KBT2 (K2 rear panel) 4.00
E100072SS K2 Replacement Front Panel 25.00
E100075SS  K2 Rear Panel upgrade for K60XV. Adds two connector holes for transverter I/O on the lower rear panel. Included with new K2s starting at #4088 19.00
K2FCTR K2 Replacement Frequency Probe Kit 10.00
RFPROBE K2 Replacement RF Probe Kit 10.00
SSBCAPKT

KSB2 Wider Bandwidth Capacitor Kit. (2.4kHz  and 2.6 kHz capacitors.)  See manual for details.

15.00

 

K2 Revision A to B Upgrade 

The mod kits listed below will upgrade an existing, BUILT, Revision A (or Field Test Rev.  XC) K2 to one equivalent to Revision B. (The revision number refers to the PC board revision.)

We recommend that you download the K2 A to B Upgrade Instructions to review all of the changes before deciding which mod kits to purchase, as some of them are optional, and you may have installed some of them previously.

Check the boxes for the mod kits you need (except those you may have already installed) and click on the ADD TO CART button at the bottom of this section.

NOTE: If you have an UNBUILT Revision A K2 (s/n less than 3000) and wish to build it with new Rev B PC Boards, parts and manual, do not order the mod kits listed here. They only apply to existing Rev A K2s. See the next section below to order the K2BCOMPKT, F/W and Manual. 

 
  Part Number

Description

Price
BFOMDKT K2 BFO Toroid & PLL Ref Osc Xtal Upgrade   10.00
E850093    10M BPF, VFO/ALC Mod Kit for the K2 10.00
XFILMDKT Second Filter Upgrade 10.00
FWK2MCIO K2 MCU F/W Upgrade to 2.04; K2 IOC Upgrade to 1.09 

 Only required for the A to B mod if you have K2 Main MCU F/W less than Rev 2.00., but also required for K2KEYMDKT. 

54.00
E850089 Grill Cloth 1.00

E850138

K2 Temperature Compensated PLL Reference Upgrade  

This compensation circuit reduces the reference oscillator's temperature coefficient by as much as a factor of 10 for superior frequency stability over temperature.  Instructions

Included with all K2s shipped after 4/25/03. (S/N 3446+)

If your K2 serial number is below 3000, we also strongly recommend installation of the BFO modification kit (BFOMDKT) before the PLL upgrade is installed. (K2s s/n 3000 and up already include the changes to the BFO circuit.) Also, K2 firmware older than 2.00 should be upgraded  (FWK2MCIO) to take maximum advantage of the PLL upgrade. Tuning linearity is much improved with the new F/W.

19.00
K2ATOBKT

K2 Rev A to B upgrade parts: Remaining parts needed (after making the above mods) to upgrade your K2 from Rev A to Rev B. Includes K2 Revision A to B upgrade instructions. See the instructions for a list of parts.

15.00

  

      

K2 Revision B Component Upgrade Kit (For Unbuilt Rev A K2s Only)  
The items listed here allow UNBUILT, Revision A K2s to be completed as Revision B K2s. (The revision number refers to the PC board revision.) If you have a BUILT, or Partially Built,  Revision A K2 (s/n less than 3000), DO NOT ORDER THIS COMPONENT KIT. You will need to order the A TO B Upgrade kit in the previous section

The K2BCOMPKT  kit is offered for a limited time at a reduced price as a service to those who may still have unbuilt Rev A K2s. 

We recommend that you download the K2 Rev B Component upgrade Instructions to review all of the changes. All three of the items listed below are required for this upgrade.  Check the boxes for the items you need (except those you may have bought previously or printed out) and click on the ADD TO CART button at the bottom of this section.

 
  Part Number

Description

Price
K2BCOMPKT

K2 Rev B Component UpgradeKit: Includes new Rev B PC boards and the parts needed to construct UNBUILT Rev A (S/N<3000) K2s as Rev B K2s. Includes K2 Rev B Component upgrade Instructions. Also includes parts for the K2KEYMDKT. See the instructions for a list of parts. Also requires the FWK2MCIO Firmware listed below. 

49.00
FWK2MCIO K2 MCU F/W Upgrade to 2.04; K2 IOC Upgrade to 1.09 

Required for the K2BCOMPKT upgrade component kit unless you previously have purchased this revision or later. 

54.00

E850138

K2 Temperature Compensated PLL Reference Upgrade  

This compensation circuit reduces the reference oscillator's temperature coefficient by as much as a factor of 10 for superior frequency stability over temperature.  Instructions

Included with all K2s shipped after 4/25/03. (S/N 3446+)

Also, K2 firmware older than 2.00 should be upgraded  (FWK2MCIO) to take maximum advantage of the PLL upgrade. Tuning linearity is much improved with the new F/W.

19.00
E740001 K2 Manual for the Rev B PC Board Set. (Also available FREE for download here.) 29.00

 

 

KPA100, K2/100 PARTS

KPA100UPKT

KPA100 UPGRADE KIT    

Upgrades older KPA100's to the current manual Rev D  (10/26/06)  Instruction Sheet

19.95

KPA100PAKT

PA Replacement Kit for KPA100. 

100W matched transistors with four thermal pads.

63.00

KPA100TH

Thermal Pad Kit for KPA100

Thermal pads for all heatsink mounted transistors. (4 pc).

5.00

E740035

KPA100 Manual

19.00

SDSCRKT

5-40 Taptite Side Screws - KPA100 

(qty 2 per pkg) Replaces heatsink 4-40 side screws.

N/C
KPA100MODKT Component changes to the KPA100 to improve high SWR operation and support 60M operation. (Needs FWKPA100 1.09 for higher 2:1 SWR power reduction..)    Manual 19.00

KPA100SHLDKT

 

KPA100 Shield Upgrade. Internal shield for the KPA100 with side grounding clips. Provides better shielding between theKPA100 and K2 under high SWR transmit conditions. Already included with all K2's S/N 3574+, shipped on June 14, 2003 or later.

15.00
KPA100RESKT Correction for KPA100 low power on 20/17M. Replaces two KPA100 resistors that were found to be slightly inductive.   (Please do not request this kit if your KPA100 is not exhibiting low power problems 20/17M.) See Builder Alert 22a 00.00

  

K1 PARTS AND MOD KITS
Part Number Description

Price

 
K1BKLTKIT LCD Backlight Mod Kit for built K1s  (see manual)   picture 29.95
K1BKLTKIT-X LCD Backlight Mod Kit for unbuilt K1s  (see manual)   picture 19.95

K1PAKT

PA Replacement Kit for K1

Includes PA transistor and thermal pad.

5.00

K1UPKT

K1 Upgrade Kit. 

Upgrades older K1s (s/n 1092 and earlier) to match current K1s. See app. note (633KB  .pdf)

(Also see K1 Firmware Upgrade below)

10.00
       

E740016

K1 Manual

19.00

K1B80

80M Band Module for K1/KFL1

7.50

K1B40

40M Band Module for K1/KFL1

7.50

K1B30

30M Band Module for K1/KFL1

7.50

K1B20

20M Band Module for K1/KFL1

7.50

K1B17

17M Band Module for K1/KFL1

7.50

K1B15

15M Band Module for K1/KFL1

7.50
E100096SS K1 Replacement Front Panel 18.00

 

 

FIRMWARE UPGRADES

FWK2MCIO

 K2 MCU F/W Upgrade to 2.04; K2 IOC Upgrade to 1.09  (IOC Req'd for this upgr.) 2.04 Upgrade Notes

Shipped with K2 s/n 4060+.  Required for K2KEYMDKT.  KDSP2 DSP2 firmware rev. 3.1 (FWKDSP2) also required for new front panel DSP shortcuts.

54.00
FWKDSP2 KDSP2 Firmware Upgrade to Rev. 3.1 (For the DSP2 board.) Allows direct front panel access to KDSP2 autonotch and denoiser functions when using K2 firmware 2.04 or later. 29.00

FWSSB

KSB2 F/W Upgrade to 1.08 

(1.08 adds a 0.2 second VOX delay to the existing 1.0 and 0.4 second delays.)

(1.07 added KPA100 support to version 1.04.)

29.00

FWKPA100

KPA100 F/W Upgrade to 1.10. (Requires KPA100MODKT and KPA100SHLDKT before installation.)

29.00

FWK1

K1 MCU F/W Upgrade to 1.09E

39.00

FWKAT1

KAT1 F/W Upgrade to 1.3. 

Increases matching range for loads that caused PLO message.

29.00

FWKAT2

KAT2 F/W Upgrade to 1.07

29.00

FWKAT100

KAT100 F/W Upgrade to 1.05

29.00
FWKX1 KX1 F/W Upgrade 1.02 supports KXB3080 and scanning (Shipped w/ SN 1367+) Description 29.00
FWKXAT1 KXAT1 F/W Upgrade to 1.2  Description

Adds manual tuner adjustment for out of band SWL operation.

29.00

  

MISCELLANEOUS

CHSCRKT

Chassis Screws, Black, 4-40 x 3/16  Pan Head (qty 20 per package)

2.00
FLTSCRKT Flat Head Undercut 4-40 chassis screws

Used on the K1 (qty 10 per package)

1.00
BZSCRKT

2-56 x 1/8" Fillister Head Screws

Used for display bezel on K1, K2 (QTY 5/pkg)

0.50

E850089

Grill Cloth 

For speakers on the K1, K2 and KPA100. Included on all new kits.

1.00

E620028

Headphone Jack (K1, K2)

3.00

E620032

2.1mm Power Plug

Used on the K1, K2 and KAT100.

3.75
APPCON Anderson Power Pole 30A Connector (Red/Black) for K2/100.   1.95
PSWIRE10FT

Power Supply Wire,  #12, 10 Feet 

Black/Red Stranded Zip Cord for K2/100

7.50

E980000

Keycap - Rectangular, Black (K1, K2)

0.50

E980027

Keycap - Rectangular, Gray (K1, K2)

0.50

E980009

Keycap - Square, Black (Rate/Lock - K2)

0.50

SERNUM

Serial number for K1 or K2 (Specify serial number in the comments section of the checkout order form.)

5.00
PD1CVR KXPD1 Hole Cover Label 2.00
KX1PWRMODKT KX1 Power Output Modification  KX1 Application Note Rev B.pdf  (April 2006) Included with all KXB3080 kits shipped after 4/4/06 N/C
XV144MDKT Addition of L19 to the XV144 to allow pulling of osc. frequency N/C

  

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