KAT500 Software Page

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

Beta Firmware Revisions


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

Browse KAT500 Beta Firmware FTP Folder


Current KAT500 Firmware Revisions

MCU 1.75, April 26, 2016

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)

  • When ATU's frequency is set with F, FA, or MT commands, update TX frequency counter from the command rather than waiting for next transmission. Avoids switching to the ATU settings for the old TX count frequency on next TX before the TX frequency is counted.

  • When Memory Recall Tune in Manual and Auto are off, don't retune on band switch frequency count.

  • Add FCCS (Frequency Count Continuous Sample time) command to influence frequency counter inertia. Lower values cause the KAT500 to more quickly accept a new frequency count, higher values make the KAT500 less willing to move. This is likely to make the most difference in SSB.

  • Use KAT500 command tester: FCCS; to query. FCCS nn; to set. Default is 12 msec.



KAT500 Utilities and Drivers for Windows, Mac and Linux

Use this software to load the latest firmware into your KAT500 

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.


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.