microHAM micro KEYER II firmware v2.3

microHAM · Released Feb 11, 2008 · First seen Sep 9, 2026

Source: microham.com

v2.3 is not the latest firmware for the microHAM micro KEYER II: the current version is v6.21 (October 8, 2020). Go to v6.21

What's in this update

  • WinKey command 0x18 (PTT On/Off) is filtered out. Instead of ​sending it to the WinKey the PTT is generated by firmware. This ensures ​hot switch protection. Paddle drops such simulated PTT in all modes.

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Other versions for this product

See the full firmware history for the micro KEYER II