It's very easy to expand the frequency range, you just have to edit the "setting.ini" file in the program folder of the factory sofware. You can do that with notepad. You will of course need the programming lead and factory software.
IMPORTANT: Make sure you get the right program else you'll do damage (brick) it. There's different software for the UV-3R Mk1/2's and the UV-3R+ (Plus) so make sure you have the right one. The mod is the same though.
Look for the bit that says:
and change it to:
amd save the file, overwriting the original. Then when you launch the software select the range from the "Freq Range" (usually the first one) and "Write" to the radio. It will remove all your pre-programmed channels, this is normal and there's no way around it, but will extend the frequency coverage, you can then put all your channel frequencies back in afterwards and upload them again. If you upload any saved channels it will revert back to the default range so save the new ones with the increased range after programming.
I've done this myself so I know it works :)
--- In UV-3R@yahoogroups.com, "C. J. Kikkert" <Keith.Kikkert@...> wrote:
> The UV-3R covers 400 to 470 MHz. The RDA 1845 will go to 500 MHz. The
> UV-5R can go to 480 MHz. Does anyone know how to program the UV-3R to
> cover the 476-478 MHz UHF CB band used in Australia. Tried two
> programmes, they prevent setting frequencies above 469.995 MHz
> For information, the direct down conversion technique used by the
> RDA1845 results in lower audio distortion than obtained by radios using
> dual IF frequencies as used in older radios.
> Cornelis Jan (Keith) Kikkert BE, PhD, FIEAust,LSMIEEE, CPEng Adjunct
> Associate Professor 15 Durham Court Mt. Barker South Australia, 5251
> Phone 08 8391 2817 Mob 04 3987 6938