Elecraft KPA500
firmware v1.20
Elecraft · Released Dec 22, 2012 · First seen Sep 14, 2026
Source:
elecraft.com
v1.20 is not the latest firmware for the Elecraft KPA500: the current version is v1.54 (December 17, 2017). Go to v1.54
In short — summary by updatemystuff.com
Fixes serial port hangs, LCD display corruption, and power-on OPER messaging
- Serial port data overrun during power-on no longer causes hanging
- LCD display selection resets if corrupted when powered off from back panel
- Power-on OPER message now sends correctly when configured
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
- Corrected issue with power on not sending an OPER message when Power-On=>OPER is set.
- Data overrun condition is now detected and cleared for serial ports when interrupts are enabled. Data sent between the power-on command and serial system being enabled were causing the serial ports to hang.
- If the KPA was powered off from back panel the LCD display selection may become corrupted. It is now checked and if out of the proper range, is reset for the band display.
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