Elecraft K3S
firmware v4.81
Elecraft · Released Jan 25, 2014 · First seen Sep 14, 2026
Source:
elecraft.com
v4.81 is not the latest firmware for the Elecraft K3S: the current version is v5.67 (January 22, 2019). Go to v5.67
What's in this update
MCU 4.81 / DSP 2.82
- XVTR IF BAND CAN NOW BE 10 OR 18 MHZ (in addition to the original selections).
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