Elecraft K3S
firmware v1.88
Elecraft · Released May 4, 2008 · First seen Sep 14, 2026
Source:
elecraft.com
v1.88 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
AFX BINO distortion fixed; FM deviation corrected; transverter power limits now enforced.
- AFX BINO mode no longer causes SSB TX or CW RX distortion
- FM deviation corrected to 3 kHz
- Transverter power limits properly set and enforced on band changes
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
MCU 1.88 / DSP 1.70
- CONFIG: XVn PWR menu entry now correctly sets the power range upper limit for the associated transverter band; the PWR control can be used to reduce this level.
Also, the max limit for each transverter band is now enforced on band change.
- MIC AND LINE IN GAIN: Resolution improved; higher settings will be required as a result.
- FM DEVIATION corrected (now 3 kHz). In DSP rev 1.69 it was set too high.
Eventually it will be adjustable.
- AFX ÒBINÓ mode no longer causes SSB TX distortion or CW RX distortion.
- CONFIG: TXG VCE menu entry is now working. If your peak power in voice modes is too low compared to the PWR knob setting, use a higher TXG VCE value.
However, if you have an amplifier connected, watch its meter for excessive voice peaks, and reduce the PWR setting accordingly. (Also see comments about SSB POWER CONTROL in previous firmware release.)
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