Bruce Bennett - I believe you will find this mod is illegal even for a HAM. I suggest you go to this forum: http://www.rcuniverse.com/forum/forumid_125/tt.htm and pose the question there of the Futaba support people and get expert advice. Be sure to mention you are a HAM operator. I can promise you there is more to it than merely plugging in crystals. It can be done by a Futaba service center but I am not aware of the exact procedures for your radio.

BTW - I am not a HAM but have great respect for them, I just do this for a living with my commercial license.

Another Bruce