Elecraft K3S
firmware v3.78
Elecraft · Released Mar 4, 2010 · First seen Sep 14, 2026
Source:
elecraft.com
v3.78 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
Fixes VFO B text display, AM 9 kHz tuning errors, and audio artifacts in BIN effect.
- VFO B menu text display corrected during scrolling
- AM 9 kHz tuning PLL errors fixed for EU broadcast band
- BIN audio effect stability improved to eliminate artifacts
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 3.78 / DSP 2.54
- MENU ENTRY TEXT ON VFO B: Eliminated occasional incorrect text appearing on VFO B while scrolling through menu entries.
- AM MODE 9 KHZ TUNING (EU): Corrected occasional PLL errors related to tuning in 9 kHz steps in AM broadcast band.
- AFX ÒBINÓ MODE: Further stability improvement for the ÒBINÓ audio effect (selected by MAIN: AFX). An audio artifact could occur under certain receive-signal circumstances.
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