microHAM micro KEYER II
firmware v4.0
microHAM · Released Nov 14, 2008 · First seen Sep 9, 2026
Source:
microham.com
v4.0 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
Enables standalone CAT decoding, changes CW/PTT behavior, and adds display options.
- CAT decoder works in standalone mode
- CW in VOICE mode no longer generates PTT signals
- Display items for preset name and keyer mode
Written from microHAM's release notes, which are printed in full below.
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What's in this update
- Internal CAT decoder. Now decoding works in standalone mode too.
- Now CW in VOICE doesn't generate PTT1/PTT2 at all. It is possible to switch between "Semi Break-In" and "QSK" using "Force QSK" keyboard function.
- New items can be displayed: preset name, keyer mode.
- Now PTT is not locked when TX frequency is out of SteppIR range.
- Keyer locks PTT when SM reports "Out of bands".
- Support for older versions of SteppIR controller.
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