Kenwood TS-590S
firmware v1.03
Kenwood · Released Mar 24, 2011 · First seen Sep 6, 2026
Source:
kenwood.com
v1.03 is not the latest firmware for the Kenwood TS-590S: the current version is v2.05 (March 12, 2020). Go to v2.05
In short — summary by updatemystuff.com
Fixed antenna tuner detection, SSB-DATA AGC behavior, and AM band auto-step.
- AT-300 antenna tuner connection detection improved
- SSB-DATA mode AGC time constant corrected
- AM broadcast 9kHz auto-step function fixed
Written from Kenwood's release notes, which are printed in full below.
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What's in this update
The following symptoms are revised.
- When turning [SSB-DATA] mode on and off, the AGC time constant might not change correctly.
- The TS-590S might not detect a connection with the AT-300 external antenna tuner.
- The AM broadcast band 9kHz auto step size (Menu No.13) may not work correctly.
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