Futaba 10J F4109 Data Sheet

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The R3008SB has two antennas. In order to maximize signal reception and promote safe 

modeling Futaba has adopted a diversity antenna system. This allows the receiver to obtain RF 

signals on both antennas and fly problem-free.

To obtain the best results of the diversity 

function,  please  refer  to  the  following 

instructions: 

1. The two antennas must be kept as straight 

as possible. Otherwise it will reduce the 

effective range. 

2. The two antennas should be placed at 90 

degrees to each other. 

  This is not a critical figure, but the most 

important thing is to keep the antennas 

away from each other as much as possible. 

  Larger models can have large metal 

objects that can attenuate the RF signal. In 

this case the antennas should be placed 

at both sides of the model. Then the best 

RF signal condition is obtained at any flying 

attitude. 

3. The antennas must be kept away from 

conductive materials, such as metal, 

carbon and fuel tank by at least a half 

inch. The coaxial part of the antennas does 

not need to follow these guidelines, but do 

not bend it in a tight radius. 

4. Keep the antennas away from the motor, 

ESC, and other noise sources as much as 

possible. 

*The two antennas should be placed at 90 degrees to each other. 

*The Illustration demonstrates how the antenna should be placed. 
*Receiver Vibration and Waterproofing: The receiver contains precision electronic parts. Be sure to avoid vibration, 

shock, and temperature extremes. For protection, wrap the receiver in foam rubber or other vibration-absorbing 

materials. It is also a good idea to waterproof the receiver by placing it in a plastic bag and securing the open end of the 

bag with a rubber band before wrapping it with foam rubber. If you accidentally get moisture or fuel inside the receiver, 

you may experience intermittent operation or a crash. If in doubt, return the receiver to our service center for service.