UCR401 v2.8

Added NU Hybrid mode (labeled "NU HYB") and changed "400" mode label to "NA HYB".

UCR401 v2.7

Fixed transmitter battery metering so the icon will appear empty at the correct voltage when lithium batteries are used.

UCR401 v2.6

Improved diversity and noise squelch systems for substantially quieter operation under moderate to weak RF conditions.

UCR401 v2.5


  • Fixed problem wherein user group V could not always hold 16 channels.
  • Applied bug fixes and sonic refinements to mode 3.
  • Improved response to sharp acoustic transients.

UCR401 v2.4

TV channel numbers are now correctly reported on blocks 470 and 19.