Elecraft KAT500
firmware v1.79
Elecraft · Released Sep 2, 2018 · First seen Sep 14, 2026
Source:
elecraft.com
v1.79 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
Added SWR protection to interrupt amplifier key line when threshold exceeded in all modes.
- Amplifier key line interrupts on high SWR in all ATU modes including Bypass
- Configurable SWR threshold; 99:1 disables the protection
Written from Elecraft's release notes, which are printed in full below.
Was this useful? Thanks.
What's in this update
Interrupt amplifier key line when SWR exceeds a configurable threshold in all ATU modes, including Bypass. SWR Threshold for amplifier key interrupt may be configured high (99:1) to disable this protection mechanism. See KAT500 Utility Help: Configuration, Edit Configuration, SWR Thresholds.
updatemystuff.com never hosts firmware files — always download from the official source.
Get it from ElecraftWatch the KAT500 for updates
Create a free account and get an email the moment Elecraft publishes new firmware.
Create account & watch