Not legally. If it is a used radio, I would suggest you have it checked over by the Futaba service center anyway. They often find little things wrong that you may not notice until you are picking up pieces of a dead airplane.

There will be people that will come on here and tell you to go ahead and do it. Just remember that you may be endangering your plane and those of others if your transmitter is not operating properly and transmitting spurious signals. [:@]