I have expanded my radio frequency 7.100 to 7.200 mhz transmition (FT-857 UK version) using hardware jumper fix method. This is how I did it:
Open the top cover of the radio
Locate the jumper section- you will see nine jumpers about 2" from the front edge of the main unit and about 3/4" from the left edge (see photo)
Now remove the jumper at JP1002 by using a low power Soldering Iron (not to damage the board or the next components)
Put everything back and close the radio - That's it for the hardware bit of the mod!
The last thing you should do before you start the radio: press and hold in the [F] and [V/M] keys and switch the radio on while holding them - Mod is now complete. enjoy!!