Kenwood TS-990S
firmware v1.03
Kenwood · Released Jul 12, 2013 · First seen Sep 6, 2026
Source:
kenwood.com
v1.03 is not the latest firmware for the Kenwood TS-990S: the current version is v1.26 (September 25, 2023). Go to v1.26
In short — summary by updatemystuff.com
Increases TX monitor level and reduces CW RX noise; improves TF-SET and Voice Message functions.
- TX monitor maximum level increased by approximately 6dB
- CW full break-in RX noise reduced
- TF-SET function now works in Simplex mode with XIT on and RIT off
Written from Kenwood's release notes, which are printed in full below.
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What's in this update
The following features are updated.
- Enables use of the TF-SET function while the CW/Voice Message screen is displayed.
- Enables toggling Sub Band reception between ON and OFF while the CW/Voice Message screen is displayed.
- When PF keys are pressed to play a CW/Voice Message while CW/Voice Message screen is not displayed, the CW/Voice Message screen is opened. It closes again after playing the message is completed.
If playing a message is stopped by F4[STOP] key, the CW/Voice Message screen remains.
- Enables TF-SET function in Simplex mode while "XIT is ON and RIT is OFF".
While [TF-SET] key is pressed, XIT offset frequency can be set by [Tuning] (Main) control as well as [RIT/XIT] control.
The function does not work when RIT is ON.
Please also update the Radio Control Program
ARCP-990
which includes above revisions.
- Increases TX monitor maximum level by approximately 6dB.
- Reduces CW full break-in RX noise.
- Extends default AGC time constant values in "FAST", "MIDDLE", "SLOW"
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