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Old Aug 25, 2013, 08:27 AM
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Oxford, Michigan, United States
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Generic 25 controllers

I have a pair of Castle's older Generic 1.5Amp BEC 25 amp controllers I'm putting in a GWS ME262 twin. Can I parallel the two BEC to run the 4 servos on board on a 3S pack? Or would I be better off with a separate BEC?

Pete Foss
Skymasters RC of Michigan
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Old Aug 30, 2013, 06:02 PM
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United States, IL, Peoria
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cannot parallel the BECS- if one is off voltage from other they will burn. use a castle 10 BEC and fly safe, my friend
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Old Aug 30, 2013, 07:06 PM
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Actually Castle told me to go ahead and parallel them.
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Old Aug 30, 2013, 07:12 PM
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Originally Posted by speed2004 View Post
cannot parallel the BECS- if one is off voltage from other they will burn. use a castle 10 BEC and fly safe, my friend
The linear voltage regulators that Castle and most (all?) other brands use can only source current, not sink it.
So no danger of one burning out the other. If one is low it will simply not put out any current. As well, most ESCs (including Castle) simply parallel two or more regulators to get higher current capability.

As Pete says, Castle actually recommended leaving both BECs functioning to gain some current handling capability. IIRC they said it went up about 1.5X.

Switching regulators (UBEC/SBEC) are another story.
I would not suggest paralleling them.

Pat MacKenzie
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