How to change the frequency Futaba 7CAP

| Is it possible to change , say for example the frequency of FUTABA | 7CAP from 72MHZ to 40MHZ

No. The 7C does not have a module, so you cannot change the frequency band. In theory it's certainly possible, but it's not a simple matter of changing the crystals -- lots of stuff would have to be changed.

My advice? Sell it (in the US) -- you'll probably get much of your money back -- and buy something with a module. Preferable something with a 40 mhz module already so you don't need to buy that. | If you can mail, me that would be great snipped-for-privacy@pondugula.com

Ok ...