Elecraft K3S
firmware v2.59
Elecraft · Released Oct 28, 2008 · First seen Sep 14, 2026
Source:
elecraft.com
v2.59 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
Audio tones now available for switches; diversity mode receive control issue fixed.
- Switch tones available when enabled
- Diversity mode receive control adjustment corrected
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 2.59 / DSP 1.94
- SWITCH TONES NOW AVAILABLE: If CONFIG: SW TONE is set to ON, tapping or holding switches produces audio tones corresponding to the switch state. This supplements the normal tactile feedback of the switches.
- DIVERSITY MODE: Corrected issues related to adjusting receive controls during transmit.
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