microHAM micro KEYER II
firmware v4.2
microHAM · Released Dec 12, 2008 · First seen Sep 9, 2026
Source:
microham.com
v4.2 is not the latest firmware for the microHAM micro KEYER II: the current version is v6.21 (October 8, 2020). Go to v6.21
In short — summary by updatemystuff.com
Corrected SteppIR frequency control hysteresis and CAT decoding settings initialization.
- SteppIR frequency control hysteresis implementation fixed
- Radio channel CAT decoding settings initialization improved for legacy format compatibility
Written from microHAM's release notes, which are printed in full below.
Was this useful? Thanks.
What's in this update
- bug fixed: Hysteresis in SteppIR frequency control was incorrectly implemented.
- bug fixed: Radio channel extended settings concerning CAT decoding was initialized incompletely when computer sent radio channel settings in old short version format. It couldn't caused problems when used with actual router.
updatemystuff.com never hosts firmware files — always download from the official source.
Get it from microHAMWatch the micro KEYER II for updates
Create a free account and get an email the moment microHAM publishes new firmware.
Create account & watch