Elecraft K3S
firmware v4.58
Elecraft · Released Nov 7, 2012 · First seen Sep 14, 2026
Source:
elecraft.com
v4.58 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
CW decode improved with independent AGC and better space detection; keyer paddles disabled in FSK-D/PSK-D when text decode is off.
- CW decode algorithm includes independent AGC system
- Element/word space detection improved for better copy rate
- Keyer paddles disabled when text decode is off in FSK-D/PSK-D
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 4.58 / DSP 2.80
- CW DECODE IMPROVED: The CW decode algorithm now includes its own AGC system, independent of regular AGC threshold/slope/decay settings. Decode of element spaces vs. word spaces adjust slightly to improve rate of copy on average code samples.
- KEYER PADDLE ENABLED IN FSK-D/PSK-D MODES ONLY IF TEXT DECODE IS ON: Those using FSK-D/PSK-D via with a computer requested that the paddles be disabled when the K3's internal text decode is OFF so that hitting the paddles accidentally doesn't interfere with PC-based transmission.
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