CHIRP

Despite Driver information > Limits disabled for modified firmware = TRUE, a channel with a value of say 300MHz can not be added.

(chirp:10931): Gtk-CRITICAL **: 17:38:08.700: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScrollbar
WARNING: User expanded band limits

(chirp:4800): Gtk-CRITICAL **: 17:34:43.547: gtk_widget_set_allocation: assertion '_gtk_widget_get_visible (widget) || _gtk_widget_is_toplevel (widget)' failed
WARNING: Memory failed validation: Memory 51: 300.000000/0.600000 FM () r88.5 c88.5 d023 NN [5.00]

GUI reports "Invalid edit: Frequency 300.000000 is out of supported range; Transmit frequency 300.0000 MHz is not supported by this radio; The frequency 300.0000 MHz is not supported by this radio"

300MHz is available in the VFO under third party firmware.