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03.27.2011, 05:20 PM
BEC = Battery Eliminator Circuit
It is used to power the rx and servo if the built-in BEC on the esc isnt strong enough or doesnt have one at all.
Might be worth recalibrating the esc to the tx too if you havent tried that yet, make sure the throttle trims are at neutral & there are no weird expo/ epa settings etc.
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