Elecraft K3S
firmware v5.54
Elecraft · Released Sep 24, 2016 · First seen Sep 14, 2026
Source:
elecraft.com
v5.54 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
ADC reference parameter auto-corrects on startup to maintain accurate voltage and current displays; flash memory improved
- ADC REF resets to 5.00V if out of range at power-on
- Flash memory read/verify operations improved
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 5.54 / DSP 2.88 / FPF 1.26
- FLASH MEMORY INTERFACE UPDATED: Improved robustness of read/verify operations between the MCU and flash IC.
- POWER-ON CHECK OF ADC REF MENU PARAMTER: If the value of CONFIG: ADC REF is out of range, it is reset to 5.00 V to ensure useful accuracy of voltage and current displays, etc.
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