Then there is always the Hitec Spectra Module so you can dial in any of the 50 channels, Futaba also came out with one too. Before Futaba came out with one people discovered that you could install the HT unit in your Futaba computer radio just by flipping it upside down and it worked quite well on the higher channels. Problem is if you are changing gear from brand to brand it is Illegal. I ordered my first HT radio with one of these and other then one little problem they are great.
The problem is the reason we called them, {{Dial A Crash!!}} Sometimes people tended to forget to put them on the same channel as the next plane they tried to fly, oops!!! Been there!!
I still have and use one, A HT and used in my Futaba 9-C. Why would I do such A thing???[:-] I use it when I'm setting up A plane for A customer in FM and don't have his TX. Just dazzles them when they pick up there plane and it's all set up and ready to go, if not dead on then very close.
Spectra is still sold, not sure about that Futaba unit?? Never see it advertised.