Elecraft K3S
firmware v5.64
Elecraft · Released Feb 22, 2018 · First seen Sep 14, 2026
Source:
elecraft.com
v5.64 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
'HI CUR' threshold in receive mode increased to prevent false warnings and speaker disabling.
- RCV MODE 'HI CUR' threshold increased
- Eliminates spurious warnings with multiple options enabled
- Prevents speaker channel disabling
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 5.64 / DSP 2.88 / FPF 1.26
- RCV MODE "HI CUR" THRESHOLD CHANGED: The threshold at which "HI CUR" (excessive current drain) warnings appear in receive mode has been increased. Some users with all options enabled (including the sub receiver, internal transverter, and K-Pod) were seeing spurious HI-CUR warnings and disabling of one speaker channel.
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