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Old 09-25-2011, 10:18 AM   #3 (permalink)
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What is a VFD?
I would guess that a DC to DC converter like you are talking about is going to be about 85% efficient, just judging from other DC to DC converters that I've seen, but finding one that will deal with 6v is going to be hard and finding one that can deal with the high amps that you are talking about (500 amps or more) is going to be the really hard part.
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