Elecraft KX3
firmware v1.54
Elecraft · Released Jul 29, 2013 · First seen Sep 14, 2026
Source:
elecraft.com
v1.54 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
Add CW transmission in SSB mode; preserve 1-Hz tuning after APF off
- CW-in-SSB transmit capability added
- 1-Hz tuning preserved when APF disabled
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 1.54 / DSP 1.21
- CW-IN-SSB TRANSMIT ADDED: This feature allows you to send CW while in SSB mode, which can be useful when your SSB signal cannot be copied due to poor conditions. The other station will hear a tone at your CW pitch. To enable CW-in-SSB: Locate the CW WGHT menu entry, then tap 1 (PRE) to alternate between “SSW +CW” (enabled) and “SSB CW” (disabled). The default is disabled. Important Notes: (1) CW-in-SSB does not yet apply in SPLIT mode. (2) When CW-in-SSB is enabled, tapping the KEYER/MIC knob toggles between keyer speed and mic gain rather than between the two transmit metering scales (CMP/ALC and SWR/RF). The CMP/ALC scale is still shown temporarily whenever CMP or mic gain are adjusted.
- 1-HZ TUNING PRESERVED AFTER APF-OFF: If you were using 1-Hz tuning prior to turning on APF (CW audio peaking filter), 1-Hz tuning will be restored when APF is turned off. Prior to this change, exiting APF would set the tuning rate to 10 Hz.
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