Elecraft KPA500
firmware v1.38
Elecraft · Released Feb 11, 2014 · First seen Sep 14, 2026
Source:
elecraft.com
v1.38 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
Operation without BAND lines now supported for K3/BCD radio modes.
- Now operates without BAND lines connected
- K3 mode waits up to 4 seconds for band line activation
- BCD mode proceeds to operate immediately after self tests
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
Enhanced operation with no BAND lines connected and RADIO=K3 or BCD.
With POWER-ON set to OPER and RADIO=K3, on power-up the KPA will now go to operate mode when the K3 enables its band lines or if the band lines stay at all 1s for 4 seconds.
If RADIO=BCD, it will go to OPER immediately after the power-on self tests have completed.
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