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Old 06-10-2009 | 08:24 AM
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Cpt.America
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Originally Posted by Duster_360
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...
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