Elecraft KX3 firmware v2.82

Elecraft · Released Nov 6, 2017 · First seen Sep 14, 2026

Source: elecraft.com

v2.82 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

Sidetone volume adjustable lower, VFO A lock prevents accidental tuning, auto-off timer range expanded.

  • Sidetone minimum volume reduced ~12 dB
  • VFO A lock prevents accidental OFS/B tuning
  • Auto-off timer range 5-100 minutes (was 3-20)

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

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What's in this update

MCU 2.82 / DSP 1.52

  • SIDETONE VOLUME CAN BE SET LOWER: MON=1 is now about 12 dB lower in volume than it was originally. MON=50 is about the same as the original maximum.
  • AUTO-OFF TIMER RANGE IS 5 TO 100 MINUTES: Auto-power-off (MENU: AUTO OFF) allows the radio to turn itself off if no controls are to​uched for the specified length of time. (The original range was 3 to 20 minutes.) If auto power-off is not desired, set the menu parameter to INFINITE (default).
  • VFO A LOCK DISABLES COARSE VFO A TUNING WITH OFS/B CONTROL: This is intended to prevent accidental frequency changes due to touching the OFS/B control. As long as VFO A is locked, the offset-tuning feature will also be locked. (RIT, if used, is still *not* locked. RIT may be needed to fine-tune received signals even if the VFO itself is locked on a given transmit frequency.) Note: Coarse tuning steps for VFO A are set up per-​mode using MENU: VFO CRS. The OFS/B control can be used to coarse-tune VFO A if RIT and XIT are both turned off and the control is not assigned to VFO B (“B” LED).
  • FILTER BANDWIDTH & ULTIMATE ATTENUATION FIX: Filter bandwidth settings ending in x00 Hz are now increased internally to x50 Hz to ensure excellent ultimate attenuation (stop band). For example, a setting of 400 Hz becomes 450 Hz. This is a temporary workaround for a DSP algorithmic issue with the x00 settings that will be corrected in a future release. Available bandwidth settings are now 50 Hz, 150 Hz, 250 Hz, 350 Hz, etc. These are entirely adequate for virtually all operating purposes.
  • TXCRNUL MENU PARAMETER FIX: This parameter now has a range of -9999 to +9999.

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