KAT500 Software Page

See the bottom of this page to get the latest KAT500 Utility. 

Beta Firmware Revisions

MCU 1.67, March 12, 2014

Only the current production firmware release can be downloaded by KAT500 Utility automatically.

Browse KAT500 Beta Firmware FTP Folder

  • Experimental change to avoid early search termination by a transient SWR dip. Pause for exciter fold back recovery and average over more coupler samples when tuner setting is "best so far" or reaches "stop tune" threshold. Tuning stutters a bit, but sometimes a better tuning solution is found.

  • Experimental change to Icom AH-4 Start to perform Auto Tune to avoid full search tune on each Icom TUNE button press

  • Perform memory recall tune on transition from mode BYP to MAN or AUTO

  • Speed up some tunes

Current KAT500 Firmware Revisions

MCU 1.63, February 26, 2014

This release can be automatically downloaded by KAT500 Utility.tility.

See KAT500 Firmware Release Notes for a complete revision history.

KAT500 Utility or newer. See downloads below.


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

  • Additional filtering of coupler ADC counts

  • Reduce time-to-sleep after each transmission

  • Coarse tuning speed improvements.

  • Perform Rx-time memory recall tunes using K3 VFO frequency info via AUXBUS.Requires K3 firmware revision 04.82 or later, with K3 CONFIG:KAT3 menu option KAT500Y enabled (tap numeric keypad 1 to toggle) and Memory Recall Tune on QSY enabled in KAT500 Edit Configurationurationy Recall Tune on QSY enabled in KAT500 Edit Configurationuration

  • Ignore band line changes and AUXBUS frequency messages while transmitting

  • Improve Tx frequency counter stability

  • Reduce default amplifier key interrupt SWR threshold from 99 to 3:1

  • Add a new unlogged fault when SWR exceeds amplifier key interrupt SWR threshold; reset by transmission with lower SWR

  • Invoke a wider range full search tune if tune is repeated within 5 seconds

  • Keep LEDs on while sleeping

  • New commands (see KAT500 Serial Command Reference):
      * AN0; advance to next enabled antenna
      * CT; Cancel Tune
      * TP; query tuning status



KAT500 Utilities and Drivers for Windows, Mac and Linux

Use this software to load the latest firmware into your KAT500 

KXUSB Drivers:


KAT500 Utility:

After completing a new firmware download to your KAT500, please power cycle it OFF and then back ON before using it.