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Old 04-12-2004, 09:30 AM
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Greg Covey
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Default RE: Graupner Extra 300S Antenna

The UBEC input is wired in parallel with the ESC battery connector. Since the ESC is an "Opto" isolated type, it needs power into the plug from the receiver which it gets from the UBEC device output. Simply plug the ESC into the throttle channel and the UBEC into any free channel. If no free channel exists, then a "Y" adapter is needed for the throttle channel.

Non-Opto ESCs usually need the on-board BEC disabled which requires disconnecting the red "+" wire from the receiver connector. Opto-isolated ESCs have no on-board BEC and require power from the receiver via an Rx. battery or UBEC.

The UBEC is a state of the art switching regulator designed to convert an input voltage from 5.5v to 35v DC into a regulated output voltage of 5v to power your receiver and servos. The UBEC can deliver a continuous current of 3amps and a peak short term output up to 5amps. This is meant to handle power for up to 8 servos.

A typical 4-cell receiver battery pack weighs 3.2oz so I saved 2.2oz along with the added convienience of not having to worry about re-charging another battery pack.
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