Elecraft KX3
firmware v2.18
Elecraft · Released Aug 26, 2014 · First seen Sep 14, 2026
Source:
elecraft.com
v2.18 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
Adds support for 2M adapter module for ATU-free configurations.
- 2M-ADAPT module support for non-ATU systems
- Error codes documented for adapter detection and hardware tests
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 2.18 / DSP 1.30
- KX3-2M ADAPTER SUPPORT (non-ATU): The KX3-2M-ADAPT module provides the physical and electrical interface to the KX3 when there is no ATU installed. If the adapter is installed, make sure the ATU MD menu entry is set to NOT INST. NOTE: If ERR 2M appears on the VFO B display, the value shown on VFO A identifies specific error conditions relating to the adapter module: d=003: KX3-2M-ADAPT control register test failed d=004: KX3-2M-ADAPT hardware ID test failed d=005: Neither KXAT3 or KX3-2M-ADAPT module located at power-on
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