ORIGINAL: Campgems
Go with the PCM radios. The Futaba 9CAP will work in either mode, but the 9CAF only works PPM. It gives you a broader choice of receivers.
By the way, the 9C is a great radio. It is amazing what you can do with mixing and such. The only complaint I have is the speaker for the timer is very weak. I've learned to live with it, and am getting good at dead sticks. Well not really, but I'm getting practice. Guess it's time to get the egg timer back out.
Don
Not true. The transmitters included in the 9CAPS and the 9CAFS systems are identical with the exception that one DEFAULTS to FM when setting up new models and the other DEFAULTS to PCM during setup. Either one can be over-ridden during setup however.
The major difference is that the 9CAPS system is shipped with a PCM RX and the 9CAFS is shipped with a FM RX. I believe there may be a servo difference as well.
See pg 9 of the manual
http://manuals.hobbico.com/fut/9c-su...ies-manual.pdf