Elecraft KX3 firmware `v0.92`

Elecraft · Released Apr 18, 2012 · First seen Sep 14, 2026

v0.92 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 RX SHFT menu to reduce AM detection, extends AUTO-OFF timer to transmitter keying, and adds HI=PTT option for ACC2 remote control.

RX SHFT menu shifts IF to 8 kHz to eliminate AM detection interference from nearby transmitters
AUTO-OFF timer now retriggered when transmitter is keyed
ACC2 adds HI=PTT option for RS232-based remote transmit control

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

Was this useful?

ACC2 IO menu entry now has both LO=PTT and HI=PTT options. The latter setting could be used with a computers RTS line (RS232 levels) to allow remote transmit control of the KX3. A 2.2 K or higher current-limiting resistor should be used in series with the ACC2 jacks GPIO line in this case.
AUTO-OFF TIMER (AUTO OFF menu entry): This timer is now retriggered anytime the KX3s transmitter is keyed, in addition to being triggered when switches or knobs are used.
RX SHFT MENU ENTRY ADDED: By default, this menu entry is set to “NOR” on all bands, selecting the normal I.F. (zero Hz). If a nearby high-power transmitter operating in SSB or AM modes causes audible “AM detection” in the KX3s receiver, the KX3 user can set RX SHFT to 8.0. This moves the I.F. to 8 kHz on the present band, which in most cases will completely eliminate the AM-detection effect. Note: Dual watch and roofing filters cannot be used if the I.F. is shifted. Alternatives to shifting the I.F. include: turning the preamp off, turning the attenuator on, re-orienting the transmit or receive antenna if stations are in close proximity, or using an appropriate band-pass filter at the KX3s antenna input.

updatemystuff.com never hosts firmware files — always download from the official source.

Create a free account and get an email the moment Elecraft publishes new firmware.