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Thread: Switching from 6 to 12 volts

  1. #1
    Join Date
    Dec 2018
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    La Trinité sur Mer, France
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    18

    Default Switching from 6 to 12 volts

    I have a gray marine Phantom Four 45 (1940 dated). I would like to switch the generator from 6 to 12 volts. Does any one know of a place that would sell the necessary parts for this operation?


    I had ordered them from Van Ness Engineering, but it seems to have gone out of business. The last I sopke with Dave Van Ness he told me the package was on its way. That was over a month ago...


    I need another source for these parts. Thank you for any help.

  2. #2
    Join Date
    Jun 2003
    Location
    Central Coast, Ca
    Posts
    23,587

    Default Re: Switching from 6 to 12 volts

    Most automotive generators are output voltage restricted by the regulator. (Voltage output is a direct function of voltage introduced to the field coil windings. I have seen unregulated 6v generators on my work bench make 20 volts, no problem)

    I know for certain that a 6 volt generator can operate at 12 volts, by simply adjusting or replacing the regulator. I ran a system that way for several years until I had the field coils and armature rewound. Any good electrical shop will have a contact to rewind armatures and field coils.

    (Depending on the load, heat may be an issue and I can't say how long it will run that way, my application was just headlights and taillights which were no problem)

  3. #3
    Join Date
    May 2016
    Location
    Niagara, ONT Canada
    Posts
    255

    Default Re: Switching from 6 to 12 volts

    I would assume the amp capacity drops as you raise the voltage, so for lighting, one could switch out the bulbs for modern LED equivalents to unload it.
    2019: returning from being sidelined with medical probs, crossing fingers worst is over, still in "armchair enthusiast" mode for time being.

  4. #4
    Join Date
    Jul 2000
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    N.E. Connecticut.
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    6,372

    Default Re: Switching from 6 to 12 volts

    David is still in business with VanNess Engineering. I spoke with him just a couple of weeks ago. I know that doesn’t help with the fact that he is notoriously slow.

  5. #5
    Join Date
    Dec 2018
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    La Trinité sur Mer, France
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    Default Re: Switching from 6 to 12 volts

    Quote Originally Posted by nedL View Post
    David is still in business with VanNess Engineering. I spoke with him just a couple of weeks ago. I know that doesn’t help with the fact that he is notoriously slow.
    Ah! that could be it then. It is true that to get an answer from him takes a while. I got an answer by email today saying I should be getting my package next week. It was suppose to be that way two weeks ago... Patience, patience

  6. #6
    Join Date
    Jul 2003
    Location
    Concord, NH, USA
    Posts
    407

    Default Re: Switching from 6 to 12 volts

    That reflects my experience dealing with Dave Van Ness. He's hard to get a hold of, but he has come through on things he committed to. I have received all of the parts I ordered from him though.

    He once spent two hours on the phone with me guiding me though diagnosing and adjusting a carburation problem in my boat. And that was on a Saturday morning! And I hadn't even bought anything from him at that point!

    I'm interested to hear how the conversion goes for you. I recently started another thread about converting my Chrysler Crown from 6 volts to 12. I'm thinking of doing it this winter.

  7. #7
    Join Date
    Dec 2018
    Location
    La Trinité sur Mer, France
    Posts
    18

    Default Re: Switching from 6 to 12 volts

    Quote Originally Posted by guillemot View Post
    That reflects my experience dealing with Dave Van Ness. He's hard to get a hold of, but he has come through on things he committed to. I have received all of the parts I ordered from him though.

    He once spent two hours on the phone with me guiding me though diagnosing and adjusting a carburation problem in my boat. And that was on a Saturday morning! And I hadn't even bought anything from him at that point!

    I'm interested to hear how the conversion goes for you. I recently started another thread about converting my Chrysler Crown from 6 volts to 12. I'm thinking of doing it this winter.

    Thank you for your message. It is reassuring to know that he came through in the end. I know he is a very nice guy. The few times we spoke on the phone, I could sense that he is ready to help,....if you can get a hold of him.... It is just a bit frustrating having to wait and being in the blue.

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