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Can a Futaba Transmitter opperate a JR Reciver of same frequency?

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Old 05-28-2003, 12:09 AM
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RCBOZO
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Default Can a Futaba Transmitter opperate a JR Reciver of same frequency?

I am going to change over to a Futaba 6X or 9C from a Jr 431EX. I want to know if I use the same frequency on the new Futaba transmitters can I safely operate my planes with JR receivers?
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Old 05-28-2003, 12:25 AM
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Default Can a Futaba Transmitter opperate a JR Reciver of same frequency?

You can operate the JR rx's with the Futaba tx ONLY if the Futaba tx has a setting which will allow it to transmit FM (ppm) with a POSITIVE pulse. I don't know if the 9C will invert or not (my guess is that the 6X will not); you might check the Futaba site for specs on those tx's to find out if they will invert the signal.

Futaba and HITEC FM are negative shift, while JR and Airtronics are positive shift. A positive shift tx will not operate a negative shift rx and vice-versa.

IMPORTANT: The Futaba tx will NOT operate a JR PCM rx; nor will a JR tx operate a Futaba PCM rx, etc.
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Old 05-28-2003, 01:26 PM
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Default Can a Futaba Transmitter opperate a JR Reciver of same frequency?

To the best of my knowledge, Futaba DOES NOT offer a radio capable of possitive shift transmission on 72Mhz for US use. Therefore, in North America, Futaba transmitters cannot be used with JR receivers (PPM or PCM).

In other countries (UK, Germany, Austalia, etc...), Futaba uses positive shift like everyone else, and this compatibility issue doesn't exist.
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Old 05-28-2003, 03:32 PM
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Default Can a Futaba Transmitter opperate a JR Reciver of same frequency?

On the other hand you can get an RD8000 (Airtronics) and use both Fut and JR/hitec/air receivers... yea the Hitec Eclipse (with or w/out the synthesizer) can do the trick... I would go with either of these
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Old 05-28-2003, 03:37 PM
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strato911
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Default Can a Futaba Transmitter opperate a JR Reciver of same frequency?

There are numerous transmitters that can operate with both +ve and -ve shift. Almost any decent computerized radio can these days (except Futaba).

I forgot to mention earlier - if any of your JR recievers is PCM, then no-one except JR will support them. Even then, only certain Tx's work with certain PCM Rx's
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