First, write down all your memeory entries 'cause you'll need to reset the
CPU losing all of them.  Open the top cover and on the left are a red wire
and a blue wire.  Naturally, remove all power to the radio.  Cut  both of
the wires making sure they can't short anything on the board or contact
each other.  I just used some heat shrink tubing.  Now you have to reset
the CPU by holding the Function key will turning on the power.  Radio
now transmits from about 138 to 174 Mhz and UHF band receive is 430
to 512 Mhz.  These are approximate numbers as I haven't yet been to
both band edges. Enjoy the mod and glad I could help  .