Elecraft K3S
firmware v3.44
Elecraft · Released Oct 14, 2009 · First seen Sep 14, 2026
Source:
elecraft.com
v3.44 is not the latest firmware for the Elecraft K3S: the current version is v5.67 (January 22, 2019). Go to v5.67
In short — summary by updatemystuff.com
TUNE/ATU TUNE fixed for DATA A split; squelch and noise reduction improvements.
- TUNE/ATU TUNE now produce power in DATA A/split
- Fixed squelch closure when swapping VFOs
- Noise reduction self-tests reduce artifacts
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 3.44 / DSP 2.38
- TUNE & ATU TUNE NOW WORK IN DATA A MODE/SPLIT:
TUNE and ATU TUNE were producing no power output in DATA A /SPLIT, even though normal transmit worked correctly.
- NON-FM SQUELCH WORKING ON A/B VFO SWAP: In some cases in SSB or CW mode, squelch could end up permanently closed when swapping VFOs and listening to strong signals.
- NOISE REDUCTION CONTROL: Internal self-tests added to further reduce the likelihood of AF artifacts or continuous switch feedback tones when turning NR on/off, changing bands, etc.
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