Difference between JR and Futaba receivers

[Jester]

Hey all, quick question.....

What's the difference between Futaba and JR receivers? I am looking for another receiver for my XR3, and I have seen XXL receivers for both JR, and Futaba. Any help? Thanks.

 

[BigBadWolf]

JR is positive shift, Futaba is negative shift. The only Futaba Rx I am aware of that will work with your JR is a Futaba R123F which is no longer made.

Other than the above exception, Airtronics and JR are positive shift, Futaba and KO are negative.

 

[mcvickj]

Could you explain this positive shift and negative shift some more?

 

[BigBadWolf]

Rather than going through the whole thing here, read on.

http://www.dubairchobbies.org/know_your_radio_system_complete.htm

and here:

http://www.rcuniverse.com/forum/Reciever_interchangability/m_1252314/tm.htm

 

[mcvickj]

Intersting read. Thanks for the links.

 

[BigBadWolf]

I discovered all of this on my own recently when I got an M8 and wondered why it was so damn fussy with receivers. Course for 7 years I owned nothing but Futaba so now I understand.

Oh, and I am waiting for an email back from Hitec about thier new HFS-03MM which is supposed to work with either. I want to make double sure before I buy anything else.

 

[slothy]

ya jester thats why i think my 3pk didnt work with Rx