K3 Software Page

See the bottom of this page to get the latest K3 firmware downloader, K3 Utility  and KUSB Drivers. 

For K3 Logging and Control Software, Click here for our K3 ( & K2) Software Page.

For K144XV Firmware Upgrades and the K144XV Firmware Utility, click here.

For P3 Firmware Upgrades and the P3 Firmware Utility, click here.  

Beta K3 Firmware Revisions

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 See K3 Beta Firmware Instruction for information on obtaining beta releases.
Beta releases are not automatically recognized by the K3 Utility.
 

 

 


Current K3 Firmware Revisions

MCU 5.14 / DSP 2.83 / FPF 1.19, 2/26/2015

Latest Production Release

IMPORTANT: MCU 4.67, or later, must be loaded with the new K3 Utility, Version 1.13.5.9 or later.

This release will automatically be recognized by K3 Utility.

See K3 Firmware Release Notes  for a complete revision history.

Note: For KPAK3AUX cable use between the KPA500 and K3, K3 Version 4.36, or later, must be loaded.

FAQ: Consolidated Release of K-Line Firmware
(How to setup VFO Tracking for your KAT500 and K3)

Those loading rev. 5.10 (or later) for the first time must re-do the 50-Watt gain calibration step on all bands. Once this has been done, there is no need to do it when loading future firmware releases.

  • VCO CAL FIXED (NOT APPLICABLE TO KSYN3A): The original KSYN3 synthesizer must be calibrated at time of assembly using CONFIG:VCO MD. This is once again working correctly.
  • DUAL PB CW FEATURE RESTORED: The original DUAL PB (dual-passband) CW feature has been added back in. CONFIG:DUAL PB can be used to select either DUAL PB or APF (audio peaking filter). APF is the default. See manual for details.
  • 50-WATT TX GAIN CALIBRATION REQURED (ONE TIME): The first time rev. 5.10 or later firmware is loaded into the K3, 50-watt TX gain calibration should be performed on all bands. This is fully automated by K3 Utility. This initializes transmit drive limit data that is now used to prevent overdrive of the KPA3 amplifier.

New Firmware Load Information

NOTE: Please use K3 Utility rev 1.13.5.9 or newer to download new firmware to the radio. Later revisions of K3 Utility may provide additional features (see below).

Be sure to download *all* new firmware including DSP and FPF (new --  flash memory tables). If you see “FPF LOAD PENDING” on the K3’s LCD, it is probably because you were in “Advanced” mode in K3 Utility. In this case, check the “FPF” and “Always load data tables” boxes and try the load again.  

 


 

K3 Utilities and Drivers for Windows, Mac and Linux

Use this software to load the latest firmware into your K3.

See below for K3Utility

 

Elecraft KUSB Serial to USB Cable

Elecraft offers the KUSB serial-to-USB cable for USB only computers etc.   Our cable was originally provided using a Prolific chip set but since approximately July of 2010 we have been shipping KUSB cables which use the FTDI chip set.

Before plugging in either of these cables to any of your computer's USB ports, you will need to have installed the correct drivers for your computer's operating system.   Drivers are available for most Windows, Mac, and Linux OS's.  Note that latest Windows 7 operating system already has the proper drivers included for the FTDI chip set and will automatically install them if you just plug the FTDI cable into a USB port.


Although both of these cables shipped with a mini CD, the drivers on this mini CD are not up to date.  Please follow the links below for the latest versions of the drivers.  Be sure to select the correct Operating System version.

Connecting the K3 to a Computer

The K3 uses a standard RS232 port implemented via a female DB9 for interfacing to external devices and programs.

If your computer has a standard serial port, all you will need is a straight through serial cable with a male DB9 on one end and the proper connector (usually a female DB9 or DB25) on the other end to plug into your computer's serial port and you are all set.

Most modern computers no longer have serial ports but instead use USB (Universal Serial Bus) ports for connecting to external devices. Elecraft provides the KUSB - USB to Serial adapter to connect the K3 to these computers. See above for the KUSB Drivers

 


 

K3 Utility:

 

Minimum Operating System Requirements for Elecraft Utilities:

Microsoft Windows: XP Service Pack 3 or later, including Vista, 7, 8, and 8.1.

Apple Mac: OS X 10.6 (Snow Leopard) or later

X86-based Linux: GTK+ 2.8 or later, glibc-2.4, libstdc++.so.6 and cURL. 64-bit Linux requires 32-bit compatibility libraries.

 

After completing a new software download to your K3, please power cycle the K3 OFF and then back ON before using it.

  • K3 Utility (MAC OS X Version 1.14.10.24)  October 28, 2014

    • Note: This K3 Utility version can be used to load K3 MCU versions 1.32 and above to your K3.

    • This K3 Utility version is REQUIRED to load K3 MCU versions 1.79 and above to your K3.

    • Files are in universal binary in .zip file.

    • Use this utility to check for the latest releases of new features for your K3.

    • Requires either a RS-232 cable or KUSB Serial-USB Cable to download from your Mac to the K3.

  • K3 Utility (Linux .tgz Version 1.14.10.24)  October 29, 2014

    • Note: This K3 Utility version can be used to load K3 MCU versions 1.32 and above to your K3.

    • This K3 Utility version is REQUIRED to load K3 MCU versions 1.79 and above to your K3.

    • Files are in TAR archive (gzip-compressed) format.

    • Use this utility to check for the latest releases of new features for your K3.

    • Requires either a RS-232 cable or KUSB Serial-USB Cable to download from your computer to the K3.

  • For K3 Logging and Control Software, Click here for our K3 (& K2) Software Page.

  • K3 Firmware FTP page  (Just for direct viewing of the current K3 firmware files.)