Unfortunately, no, the R603FS cannot read the different data packets from the 6EX 2.4Ghz transmitter.
http://2.4gigahertz.com/faq/faq-6ex-2_4ghz-q890.html
Sincerely,
Krysta
Product Development & Support Specialist
Futaba Service Center USA
ORIGINAL: JRexA
Is it possible to use the 6EX 2.4Ghz with a R603FS Receiver?
I ask this because a friend wants a stick radio both for Car and Heli use, and He would prefer to have only one radio, and He doesn't need more than 3 channels for his car.