Elecraft KAT500
firmware v1.54
Elecraft · Released Feb 3, 2014 · First seen Sep 14, 2026
Source:
elecraft.com
v1.54 is not the latest firmware for the Elecraft KAT500: the current version is v2.16 (May 29, 2024). Go to v2.16
In short — summary by updatemystuff.com
Reduced SWR threshold to 3:1, improved frequency counter stability, added High SWR fault and Cancel Tune command
- SWR threshold reduced from 99 to 3:1
- Added High SWR fault
- Added Cancel Tune command
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
Improve Tx frequency counter stability Reduce default amplifier key interrupt SWR threshold from 99 to 3:1 Add a new unlogged "High SWR" fault when SWR exceeds amplifier key interrupt SWR threshold; reset by transmission with lower SWR Add "CT;" Cancel Tune command
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