Elecraft KX3
firmware v1.50
Elecraft · Released May 24, 2013 · First seen Sep 14, 2026
Source:
elecraft.com
v1.50 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
New speech compression algorithm improves SSB talk power with clean transmission.
- New speech compression algorithm
- Improved average talk power
- Signal remains clean at maximum compression
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 1.50 / DSP 1.21
- IMPROVED SSB TALK POWER (CMP): Our new speech compression algorithm provides a significant improvement in average talk power (or “punch”). ADJUSTMENT PROCEDURE: (1) Set CMP = 0. (2) Start with MIC gain = 0. While speaking close-miced in your “on-air” voice, increase MIC gain until the ALC meter tickles the 5th bar. (3) While monitoring your voice with the KX3s voice MONintor, advance CMP to the desired level. The transmitted signal will still be clean even at the maximum compression setting.
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