Elecraft KPA500
firmware v1.37
Elecraft · Released Jan 24, 2014 · First seen Sep 14, 2026
Source:
elecraft.com
v1.37 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
Fixed serial command handling during startup and shutdown to prevent unusual behavior.
- Commands received during startup are now queued until after boot completes
- Serial ports disabled at shutdown beginning to prevent interference
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
Serial commands received and processed during startup could cause strange behavior.
Processing of commands during startup are now disallowed.
They will still be received and will be processed after the startup state completes.
Serial ports are now disabled at the beginning of shutdown so they cannot affect the process.
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