Elecraft K3S
firmware v4.47
Elecraft · Released Oct 19, 2011 · First seen Sep 14, 2026
Source:
elecraft.com
v4.47 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
GT control command for AGC is now more robust against accidental disabling.
- GT command format verification is more rigorous
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 4.47 / DSP 2.73
- MORE ROBUST "GT" CONTROL COMMAND (AGC): Some PC applications may accidentally turn AGC off, possibly due to a buffer overflow. The GT command format is now verified more rigorously, making this less likely. NOTE: PC applications should not send too many K3 "get" commands simultaneously, especially if a P3 is also in the system. Ideally they should wait for a response to each command before proceeding.
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