JR,& Futaba compatibility?

[mike]

Can I use Futaba servos with a JR rx?
Mike

[ctdahle]

You can, but you have to modify the plug. There is a tab on the Futaba plugs that has to be trimmed off.

For "normal" glow flying gear, about the only thing you will run into that is not compatible any more is the old style Airtronics plugs because the pinout arrangment is different that everything else, but you can re-arrange the pins if you need to.

Futaba recievers will not talk to JR transmitters and vice versa.

[mike]

Chris,
What's going to keep me from plugging a servo in backwards?
Does it even matter?
I just got the radio(my first JR)and looks like it might be possible to have polarity problems.
Thanks,
Mike

[Britbrat]

If you watch the colour coded wiring -- you won't get it backward

[ctdahle]

Britbat is right about the color coding, but how do you figurre THAT out?

presumably you have a factory switch harness, and on that, you are going to have red and black wires, so plug in the factory switch harness, because it should only plug in one way and then when you plug in the servos make sure that the red and black wires on the servos match up.

If that's not clear enough let me know, I can probably give you better instructions, but I need to dig some servos and recievers out of boxes and take a look at them, and I'd rather not, because I ALMOST have my garage cleaned up and ready to be converted into a playroom!

Cheers, Chris

OH, and if you do get them plugged in backward, probably there will not be a problem, they just wont work. HOWEVER, if you need to plug in an electronic speed control, check it's instructions carefully and make sure that the wiring is correct. Some ESCs will fry if you plug them in backward.

I think there is a diagram of the wiring color codes for all of the major brands on the website for JETI speed controls, but I have a squrimy kid on my lap...

[mike]

I finally had to get a voltmeter to figure it out.
JR has red alright,but the negative wire is either brown,or grey.
That;s where my problem was.
Looks like brown is neg. on JR.
At least Red is still pos.
Thanks for the help.
Mike

[TD]

Somebody sent me this picture a few years back, you may find it useful.

[Britbrat]

That's the one that I was trying to find!! Thanks.

[TD]

No problem, Pat. I’m sorry it took me so long to find it – I have somethin’ like 58Gig of data strewn across 8 SCSI hard disks. “Meticulous organisation” is not one of my finer traits, right now.

‘Course, it would’ve been easier to locate if I had typed in GIF type file instead of JPEG using the search function. ;D

Many thanks to Eric for hosting it. (One of my other aliases. ;D)

[mike]

That is exceiient!!!
I appreciate it.
Mike

[ctdahle]

Note that the picture illustrates Airtronics "Old Style". The new Airtronics z plugs are the same as HiTec and Jr, and can also plug in to a Futaba radio as long as you watch the polarity.

[Britbrat]

Duly noted -- thanks

[Lightning]

Or you can go to [ftp]http://www.rc-dymond.com/order_cables.htm[/ftp], buy one of their 10271 kits which will give you ten JR plugs (and the pins but you don't need those!)
Then you carefully lift the plastic tangs that stop the pins from sliding out of the Futaba connectors, slide the plastic housing off and slide on the JRs until the plastic tangs on the JRs snap into the pins.
Then Voila - you have JR plugs on your servos, complete with the little chamfers that are supposed to stop you inserting them wrong. I personally think they only work when they are new!