Elecraft KX3 firmware `v1.47`

Elecraft · Released Apr 30, 2013 · First seen Sep 14, 2026

v1.47 is not the latest firmware for the Elecraft KX3: the current version is v3.02 (April 8, 2022). Go to v3.02

In short — summary by updatemystuff.com

Noise reduction now easily adjustable via knob; fixed audio loss, S-meter pinging, and DSP issues.

Written from Elecraft's release notes, which are printed in full below.

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DSP IMPROVEMENTS: Eliminated problems having to do with S-meter pinging, “ERR DSX” error messages, loss of audio, etc. DSP-intensive functions including noise reduction, autonotch, and dual watch required optimized for minimum execution time.
NOISE REDUCTION (NR) MORE EASILY ADJUSTABLE: The overall level of noise reduction can now be set using the knob above the NR switch (AF/RF-SQL). When NR is turned on, the present setting will be displayed on VFO B for about 3 seconds. To select a new setting, rotate the knob before the display times out. The setting is independent for CW and voice modes. Note: The range of this parameter is 0-10 and corresponds to the “mix” or “M” parameter of the RX NR menu entry; see below.
RX NR MENU ENTRY CHANGES: The RX NR menu entry can be used to adjust all three NR parameters (B=beta, D=decay, M=wet/dry mix). The M parameter now has a range of 0-10, matching the range available when the knob above the NR switch is used (see above). As before, all parameters can be adjusted separately for CW and voice modes. In most cases the factory default settings can be used for beta and decay, and the mix adjusted for the desired overall amount of NR using the knob (without using the menu). You can also now reset all NR parameters to factory defaults by holding CLR.
DVR PLAY/REPEAT FIX: DVR play no longer drops messages.

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