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Old 07-23-2008, 05:35 PM   #451 (permalink)
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Scoob - '05 Subaru Impreza Outback Sport SE
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I mentioned this before somewhere, but the difference between the 3904 and 3906 is NPN vs PNP transistors. They work backwards from eachother. It's definitely possible to create an equivalent circuit, but they're not drop-in replacements.

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