Futaba 8UA, convert to Li-ion?

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Futaba 8UA, convert to Li-ion?

Postby yflihi » Mon Sep 20, 2010 4:23 am

I've changed my old radio, a Futaba 8UA to 2.4 using a Corona DSSS V2 external module. The battery's not at it's best, so I'd like to convert it to li-ion. Is this radio suitable for the 2 cell conversion like on the Turnigy? If not, will a 2+1 pack fit in?
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Re: Futaba 8UA, convert to Li-ion?

Postby RCModelReviews » Mon Sep 20, 2010 9:01 am

The problem will be the low-voltage alarm on the radio -- which will beep incessantly if you don't adjust it.

I don't have an 8U to look at and see what's involved unfortunately.
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Re: Futaba 8UA, convert to Li-ion?

Postby yflihi » Mon Sep 20, 2010 8:54 pm

OK, thanks. But will the radio/module run ok on 2 cells?
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Re: Futaba 8UA, convert to Li-ion?

Postby RCModelReviews » Mon Sep 20, 2010 10:22 pm

Yep, the module will run fine on 2S. I flew a Corona module with 2S for over 6 months and never had a problem.
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Re: Futaba 8UA, convert to Li-ion?

Postby yflihi » Tue Sep 21, 2010 3:48 am

OK, I might have a play one rainy sunday then. One last one: I want to make up a receiver pack for a six servo electric soarer. It'll be a floater so not expecting a lot of drain from the servos (prob. GWS park or similar). I would hazard a guess at no more than 5A. Could I use the higher capacity dealextreme li-ion, or would it be best to go with 1100 mAh A123 which will hold up better under load I'd say.
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Re: Futaba 8UA, convert to Li-ion?

Postby RCModelReviews » Tue Sep 21, 2010 4:31 am

Unless you want to add a regulator then you'd be advised to go with the A123 cells. They're 6.6V nominal, the Li-Ions are 7.2V which is too high to use without a regulator.
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Re: Futaba 8UA, convert to Li-ion?

Postby yflihi » Tue Sep 21, 2010 4:42 am

Sweet, thanks Bruce.
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Re: Futaba 8UA, convert to Li-ion?

Postby johnkim100530 » Wed Dec 22, 2010 6:11 pm

RCModelReviews wrote:Yep, the module will run fine on 2S. I flew a Corona module with 2S for over 6 months and never had a problem.


Corona module fitted on Futaba 8U? Then, I assume Futaba 8U works fine on 2S.

How about Airtronics 2.4 (RDS8000) and JR 8? Will controls work on 2S?
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