PX3 Software Page


PX3 Beta Firmware Revision


Please read PX3 Beta Firmware Instructions for installing beta firmware.
Only the current production firmware releases can be downloaded by PX3 Utility automatically.

Please use the latest version of the PX3 Utility.

PX3 Production Firmware Revision

MCU 1.48 , 2/8/2017

See PX3 Firmware Release Notes for a complete revision history.
This release can be automatically downloaded by PX3 Utility.


Please use the latest version of the PX3 Utility.

Rev. 1.16 or later of the PX3 requires KX3 firmware version 2.27 or later

  • Note: refer to the latest PX3 manual for more information regarding these new features.
  • Adds: USB MSD (mass storage device, memory stick, thumb drive) support. Most types of flash drives are supported. Added a new sub-menu called “MSD menu” which includes the following features.
  • Adds: Serial commands #MAA, #MBA to adjust A or B markers by an incrementing or decrementing. The adjustment value is the same as used by the K3/KX3 UP and DN commands.
  • Adds: Frequency displays now show all digits including the Hz digit. This includes the center frequency adjustment and marker values. Note that markers adjust by values determined by the current span setting.
  • Adds: To enter the text decode scratchpad, you can now use either Insert or Alt-P. To send the scratchpad, you can now use either Ctrl-Insert or Ctrl-P .
  • Adds: #MSS msd screen shot serial command



PX3 Archived Firmware Revisions

Please browse our PX3 Firmware Archive FTP Folder for obtaining archived PX3 firmware revisions.
Only the current production firmware releases can be downloaded by PX3 Utility automatically.



PX3 Utility and Drivers for Windows, Mac and Linux

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.


Elecraft KXUSB Cable for the PX3

Elecraft offers the KXUSB cable for USB only computers etc.  It uses the FTDI chip set.

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

Connecting the PX3 to a Computer

If your computer has a standard serial port, all you will need is our KXSER cable for the PX3. .

Most modern computers no longer have serial ports but instead use USB (Universal Serial Bus) ports for connecting to external devices. Elecraft provides the KXUSB cable to connect the PX3 to these computers.

PX3 Utility Download