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Thread: EPA on RC4WD XR4

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Old 07-12-2011, 02:31 AM   #1
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Default EPA on RC4WD XR4

Hello. I would like to install an EPA on my RC4WD XR4 and I´ve found this diagram from a Traxxas. Can I use it? And in the diagram, what is "cap"?




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Old 07-12-2011, 05:09 AM   #2
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Cap = capacitor
Pot = potentiometer
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Old 07-12-2011, 06:30 AM   #3
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And how many farads the capacitors are?

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Old 07-12-2011, 07:28 AM   #4
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Quote:
Originally Posted by carcueza View Post
And how many farads the capacitors are?

Thank you!!
I have no idea, I also don't know if they are ceramic or electrolytic.
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Old 07-12-2011, 11:36 AM   #5
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you can replace them with two equal value resistors

although i don't think on the xr4 you can do this, as i haven't seen anyone ever try... probably because they arn't analog channels
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Old 07-30-2011, 04:48 PM   #6
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So, then if they are digital...in theory, can someone write a program to flash it and make the endpoints adjustable?
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Old 07-30-2011, 05:11 PM   #7
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it has epa's just not on the 3rd and 4th ch's
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Old 07-30-2011, 08:36 PM   #8
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Quote:
Originally Posted by squatch71 View Post
So, then if they are digital...in theory, can someone write a program to flash it and make the endpoints adjustable?
Yea i'm sure someone could reverse engineer the rc4wd radio and write a new firmware for it.

However, i think a flashed gt3b would be a better choice...as its more widely available, super cheap, and uber cheap rx's...
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Old 07-30-2011, 08:36 PM   #9
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Quote:
Originally Posted by 2500hdon37s View Post
it has epa's just not on the 3rd and 4th ch's
and thats the problem,
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Old 07-30-2011, 11:40 PM   #10
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I own two of them...thats why I asked....

was just wondering
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Old 07-31-2011, 03:28 AM   #11
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For a basic set up these can be used.... On a 2.2 it would be a tight fit, but can be done. Just b/c a radio has EPA's and 4 ch... Doesn't mean you can run Dual ESC's and Mix them. But you can run a Dig Unit and 4WS with the below item.

http://store.rc4wd.com/Volts-Univers...le_p_1441.html

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