Elecraft KX3 firmware `v0.87`

Elecraft · Released Apr 4, 2012 · First seen Sep 14, 2026

v0.87 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

Adds FM transmit with CTCSS tones, improves QSK CW, and introduces remote control mode.

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

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FIXED SOME "HI CUR" conditions that might have occurred during RX and TX.
MAJOR IMPROVEMENT IN QSK CW.
ADDED FM TRANSMIT and initial version of CTCSS TONE SELECT (PL Tone). In FM mode, turn PL on with hold of PITCH, then adjust param, then exit. Turn off with another hold of PITCH. Stored per-band and per-memory.
ADDED FAST REMOTE-CONTROL MODE (AI4), PHASE 1: This is for use in controlling other radios (K2, K3, KX3). Puts the local KX3 into a benign (no-transmit, no-RX-audio) state. Turns sub RX off on target radio if its a K3. Misc. improvements needed.
POWER NOW ADJUSTED IN 0.2-W UNITS so it can be changed more quickly.
6-METER POWER LEVEL is now separate.

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