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  1. #31

    Re: Mystery Box in Engine Room

    Quote Originally Posted by Reefgeorge View Post
    That's right Jim. The operation of the transformer depends on the constantly building and collapsing fields created by AC in the primary windings to induce a voltage in the secondary (output) windings. Since I'm getting all nerdy this morning: the voltage is induced in the secondary windings during this constantly building and collapsing of the magnetic field around the primary windings by a process called mutual inductance and the resulting output voltage is in direct proportion to the ratio of the primary and secondary windings. 10:1 ratio and the output is 12VAC.Opps sorry, short answer: yes.Hmmm, not sure if a flux capacitor works with DC or not? :-/George
    In this case there a couple of bridge rectifiers converting the AC to DC.
    Thanks,

    Tony

    2008 Cheoy Lee Bravo 78 "Bella Sophia"
    1989 78' Hatteras CPMY #311 "Bella Sophia" (sold)
    2007 Everglades 290cc “Bada Bing” (sold)
    2006 Advanced Outdoors 28cc (sold)
    2003 Melges 24 "Bada Bing" (sold)
    2023 HCB 42 “Bada Bing”

  2. #32

    Re: Mystery Box in Engine Room

    Yes, you need rectifiers to get from AC to DC after the transformer steps down (in this case) the AC to a lower voltage. Depending on if the transformer has a center tap or not and if you want full wave or half wave rectification then you either need a bridge (4 diodes) or two discrete diodes. At that point you have (depending on what source you read) either rectified AC or unfiltered DC which is very noisy and does not develop full DC voltage potential. You add large filter capacitors after the bridge and then you have higher DC voltage with minimal ripple. Some electronics can operate with unfilterd DC/rectified AC but many circuits, especially in the modern era may not function correctly.

    George
    Florida
    2002 Cabo 47
    MAN mechanical 800/8's

    "You can avoid reality, but you cannot avoid the consequences of avoiding reality"

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