Elecraft KX3
firmware v2.12
Elecraft · Released Jul 10, 2014 · First seen Sep 14, 2026
Source:
elecraft.com
v2.12 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
Improved 40-meter transmit image suppression by fixing 40-m band-pass filter in transmit.
- 40-m band-pass filter no longer bypassed in transmit
- Narrowband 40-meter transmit images better suppressed
- FSK-D mode performance particularly improved
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 2.12 / DSP 1.30
- 40-METER TRANSMIT IMPROVEMENT: The 40-m band-pass filter was being bypassed in transmit mode, due to a change in rev. 1.94 that allowed MARS operation from 8.5-9 MHz. This resulted in reduced suppression of narrowband 40-meter transmit images, most notably in FSK-D mode. (The low-pass filter setting was correct, though, which made this error hard to detect. Wideband spurious suppression specs were met.)
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