microHAM MK2R firmware `v2.0`

microHAM · Released Sep 5, 2007 · First seen Sep 9, 2026

v2.0 is not the latest firmware for the microHAM MK2R: the current version is v7.19 (October 8, 2020). Go to v7.19

In short — summary by updatemystuff.com

Unified PTT selection across all sources and new configurable key functions.

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

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Implemented WinKey command parser to get WinKey setting under full control.
PTT selection (PTT1/PTT2/noPTT) was unified for all PTT sources (foot switch, serial PTT, WinKey)
PTT delay of each radio was coupled with WinKey PTT Lead. According to TX focus WinKey PTT Lead is adjusted.
Added new configurable key functions (switch mode, temporarily disable PA/LNA PTT, swap paddle, force QSK mode) that can be assigned to num pad key combinations ('*' and number 0-9)
Function (scenarios):
States "TX on R1/R2" was splited to "Computer TX on R1/R2" (Latch) and "Manual TX on R1/R2" (Monitor). Manual TX states have replaced refused "Headphone side tone".
Added "Reverse Latch" a "Reverse Monitor" modes.
Lowered STEREO signal priority (During TX the STEREO signal is ignored).
Added new functions on ACC I/O pins: PA PTT, LNA PTT, CW Input (Hand Key), "Focusd Band Data Output".
Band lock can be disabled (inband SO2R)
Band data on ACC are locked during TX.
bug fixed: When validity of band data timeouted keyer changed band data output to incorrect value. Now outputs stay unchanged.
bug fixed: WPM control from PS2 keyboard/numpad didn't work in standalone mode.

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