Difference in Futaba Rx's
 

What is the difference between the 603FF (89.99) and the 603FS (99.99)?

603FF has dual - internal/external antennas, it detects whether HRS or PPM is active from tx and adjusts accordingly and has a fail safe for low rx voltage.


603FF has only the external antenna. Looks like its only available in 3 channels.

That clears that up I guess... :cool:

FS is dual antenna
FF is single antenna

FS switches automatically between PPM and HRS when detected.

There is no built in F/S for either receiver. You're still dependent on setting the F/S settings in your TX which the RX defaults to if it loses signal. If you run low on voltage or lose battery there is nothing to power the RX to maintain the F/S.

FYI, you can get the FS (dual antenna) from stormerhobbies.com for $89