Elecraft KAT500
firmware v1.71
Elecraft · Released Feb 26, 2015 · First seen Sep 14, 2026
Source:
elecraft.com
v1.71 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
New FCCS command controls frequency counter responsiveness; fixes band switch retuning.
- FCCS command adjusts frequency counter response speed (default 12 msec)
- Fixed Memory Recall Tune to not retune on band switches when disabled
Written from Elecraft's release notes, which are printed in full below.
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What's in this update
When Memory Recall Tune in Manual and Auto are off, don't retune on band switch frequency count.
Add FCCS (Frequency Count Continuous Sample time) command to influence frequency counter inertia.
Lower values cause the KAT500 to more quickly accept a new frequency count, higher values make the KAT500 less willing to move.
This is likely to make the most difference in SSB. (FCCS was removed in 2.01) Use KAT500 command tester: FCCS; to query.
FCCS nn; to set.
Default is 12 msec.
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