RE: Range Problems Futaba
If you do get your transmitter changed to another frequency at a service center, you need to know not to try and change it to any other frequency once you get it back. If it gets tuned to 21, then it needs to stay on 21. You also need to get the proper crystals for your receivers. You do not mention what model transmitter it is, but it sounds like you need to get one that has model memory and then all your planes can be on the same frequency. Good Luck, Dave