microHAM micro KEYER firmware v4.0

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

Source: microham.com

v4.0 is not the latest firmware for the microHAM micro KEYER: the current version is v5.4 (March 5, 2008). Go to v5.4

In short — summary by updatemystuff.com

Adds mode switching via num pad, PA/LNA disable feature, unified PTT selection, fixed standalone WPM control.

  • Mode switching added on num pad (special keys *0-*4)
  • PA/LNA PTT disable feature added (special key *9)
  • WPM control from PS2 keyboard/numpad fixed in standalone mode

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

Was this useful?

What's in this update

  • Implemented WinKey partial command parser to​ prevent computer to send WinKey inadequate settings and to have WPM under control.
  • PTT selection (PTT1/PTT2/noPTT) was unified for all PTT sources (foot switch, serial PTT, WinKey)
  • PTT delay was coupled with WinKey PTT Lead.
  • Added possibility to switch mode on num pad (special keys: ​*0,*1,*2,*3,*4)
  • Added possibility to temporarily disable PA/LNA PTT (special key *9)
  • bug fixed: WPM control from PS2 keyboard/numpad didn't work in standalone mode.

updatemystuff.com never hosts firmware files — always download from the official source.

Get it from microHAM

Watch the micro KEYER for updates

Create a free account and get an email the moment microHAM publishes new firmware.

Create account & watch

Other versions for this product

See the full firmware history for the micro KEYER