Elecraft KX3
firmware v0.81
Elecraft · Released Mar 22, 2012 · First seen Sep 14, 2026
Source:
elecraft.com
v0.81 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 CW audio feedback on switches, sets PA thermal limit to 64°C with 5W fallback, updates 4.5 MHz+ filters.
- CW audio feedback added to switches (Phase I)
- PA rollback temperature set to 64°C with 5W power limit
- 4.5 MHz and above now uses 60-M BPF/LPF
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
- PA ROLLBACK TEMP is now 64 C. At this temp it drops power to 5 W.
- CW UI ADDED (PHASE I): All switches now provide CW audio feedback (set SW TONE menu entry to CODE nn, where nn is the desired code speed). Im working on phase two (knob feedback and VFO readout).
- 4.5 MHz and up uses 60-M BPF/LPF (to allow efficient operation on JA 4.630 MHz emergency channel).
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