Elecraft K3S
firmware v4.40
Elecraft · Released Jul 11, 2011 · First seen Sep 14, 2026
Source:
elecraft.com
v4.40 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
Error tones no longer automatically emitted on KPA500 switching events.
- Error tones on KPA500 switching now controlled by CONFIG:SW TONE setting
Written from Elecraft's release notes, which are printed in full below.
Was this useful? Thanks.
What's in this update
MCU 4.40 / DSP 2.73
- NO ERROR TONE ON KPA500 OPERATE/STANDBY SWITCHING, etc.: Previously, the K3 would emit an error tone on any KPA500 switch event. Now such tones are only emitted if the CONFIG: SW TONE menu entry is set to ON, or on a hard fault.
updatemystuff.com never hosts firmware files — always download from the official source.
Get it from ElecraftWatch the K3S for updates
Create a free account and get an email the moment Elecraft publishes new firmware.
Create account & watch