Icom IC-721 Japanese model "remodelling" Tired of the IC-721 40m upper limit of 7.100 Mhz? Here is how to add 7.100 to 7.200 to the TX range of your Icom IC-721. It is the Japanese version of the popular IC-725 marketed in the U.S.A. and Philippines. Just cut the specifed jumper. It is hard to believe technicians charge thousands of pesos for this simple modification.