Elecraft K3S
firmware v3.14
Elecraft · Released May 9, 2009 · First seen Sep 14, 2026
Source:
elecraft.com
v3.14 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
Adds speaker protection for mono plugs in stereo setup, extends RF frequency range to 24.9 GHz.
- Speaker protection detects mono jack in stereo configuration
- RF frequency parameters now support up to 24.9 GHz
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 3.14 / DSP 2.16
- SPEAKER PROTECTION: If youre set up for stereo speakers (CONFIG: SPKRS = 2), but insert a mono speaker plug, the right speaker output will be shorted to ground. This can cause excess current drain if you turn volume up to high levels. The K3 now detects this condition, automatically turning off the right channel (SPRKS = 1). If the left channel is shorted, the K3 will reduce AF gain and flash ÒHI CURÓ.
- CONFIG: XVn RF parameter can now be set up to 24999 MHz (24.9 GHz).
Application programmers: FA & FB get/set can also how handle up to 24999 MHz. This appears to work with N1MM all the way up. HRD tops out at 4 GHz, but Simon may be working on this.
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