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Old Feb 20, 2005, 11:01 AM
Battery Junkie
wrenwright's Avatar
Athens, GA
Joined Apr 2004
1,267 Posts
Futaba "J" connectors vs. JR-type connectors

What is the difference between Hitec HS-81 servos with a Futaba "J" connector and the ones with the JR-type plug?

The guy at the LHS sold me some Hitec 81's that are JR's, but I'm using them with a GWS Rx and a Futaba Tx.

Is the only difference that the Futaba J-style have the locator tab on the plug?

Seems like JR-type servos will plug into the Futaba Rx, but not the other way around.

Will I be ok using these with a GWS Rx and Futaba radio?

Thanks.
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Old Feb 20, 2005, 11:04 AM
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LesUyeda's Avatar
San Diego, California
Joined Dec 2004
3,600 Posts
The keying tab on the Futaba J, and the fact that the corners are beveled on the JR, are the only difference. You will have no problem, but will have to pay attention to keying orientation.

Les
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Old Feb 20, 2005, 11:16 AM
Battery Junkie
wrenwright's Avatar
Athens, GA
Joined Apr 2004
1,267 Posts
OK I thought the servos themselves were the same. I have to check the wire orientation on the GWS Rx anyway, so that's not a problem.

I suppose JR brand servos could be used on a Futaba Rx, but not the other way around then?
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Old Feb 20, 2005, 02:12 PM
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ebill3's Avatar
United States, WA, Puyallup
Joined Oct 2004
5,965 Posts
JR, Hitec, and new Airtronics plugs can be universaly used. Futaba plugs must be modified to fit most other receivers, unless they are without hard cases.

Bill
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Last edited by ebill3; Feb 20, 2005 at 02:14 PM. Reason: type
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Old Feb 21, 2005, 02:42 AM
Battery Junkie
wrenwright's Avatar
Athens, GA
Joined Apr 2004
1,267 Posts
Ebill3,
Well, that pic you posted cleared up everything!
Thanks.
Wren
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