Elecraft KX3 firmware `v2.27`

Elecraft · Released Nov 10, 2014 · First seen Sep 14, 2026

v2.27 is not the latest firmware for the Elecraft KX3: the current version is v3.02 (April 8, 2022). Go to v3.02

In short — summary by updatemystuff.com

RX I/Q port automatically enables with PX3 attached, firmware loading improved.

RX I/Q output automatically turns on when PX3 is detected, fixing image signal issues
Firmware loading improved to handle MCU/DSP firmware compatibility during updates

Written from Elecraft's release notes, which are printed in full below.

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RX I/Q PORT TURNED ON AUTOMATICALLY WITH PX3 ATTACHED: The KX3 now turns on the RX I/Q output whenever it detects an attached PX3. This eliminates the problem of image signals in the PX3 display due to RX I/Q being off.
IMPROVED FIRMWARE LOADING: Now handling case where new MCU firmware is incompatible with old DSP firmware in the middle of a full firmware load sequence. An error message may still appear in this case, but load timing will not be affected, allowing the new DSP firmware to be loaded correctly.

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