Elecraft K3S firmware `v4.80`

Elecraft · Released Jan 13, 2014 · First seen Sep 14, 2026

v4.80 is not the latest firmware for the Elecraft K3S: the current version is v5.67 (January 22, 2019). Go to v5.67

In short — summary by updatemystuff.com

RTTY baud rate now global; fixed macro bugs and FSK-D communication issues.

RTTY baud rate is now global instead of per-band/per-memory
Fixed macro execution bugs affecting SB, MD, DV, BW commands
FSK-D mode no longer exhibits errors or communication loss with PC-generated input

Written from Elecraft's release notes, which are printed in full below.

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RTTY BAUD RATE NO LONGER STORED PER-BAND/PER-MEMORY: The FSK-D/AFSK-A baud rate (45 or 75 baud) is now global, meaning that one setting applies in all cases. The baud rate is set by holding DATA MD, selecting FSK-D or AFSK-A using VFO B, then selecting the baud rate using VFO A.
FIXED MACRO EXECUTION BUG AFFECTING "SB", "MD", "DV", "BW" commands. These would sometimes not work correctly when used in macros.
RTTY/FSK IMPROVEMENT: In FSK-D mode using an PC-generated FSK input, the K3 no longer exhibits DSP errors (ERR DSE) or loss of communications. Previously, these may have occurred when the K3 was sent too many serial (RS232) commands.

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