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How to switch GT The Brick to 220V?

Discussion in 'Pickups & Electronics [BG]' started by larrytron, Apr 14, 2006.

  1. Hey TB'ers.
    I've just scored a used GT Brick from ebay. It arrived today, perfect so far.:hyper:

    As I live in France and the brick comes from the US, it is still on the 110V mode.

    I need it to be at 220V if I want to use it properly(I have an old 220/110 transformer but it doesn't have ground etc...).

    The problem is about the way to switch it, on the GT website it is said the 110V runs with a 1A fuse the 220 with a 1/2A fuse.
    But! when I look to the back of the brick it is said that 110 runs with 500mA and 220 with 250mA.
    Who's right?:help:
    Do you know how to switch the beast from 110 to 220? (I mean besides changing the fuse will I have to do some wiring?).

    That is a lot of questions, I know.:p

    Thanks a lot for your input.

    Moderators: Feel free to move the subject if you think it's in the wrong forum.
  2. remo


    Jan 15, 2005
    dude, I would email Groove Tubes directly on this one.
  3. I mailed them a week ago without response. I've just sent them a second email.
  4. Audere

    Audere Supporting Member Commercial User

    Apr 7, 2005
    South Beach, OR
    Owner: Audere Audio
    So this is for info only - I have no relationship with GT...

    I opened my version. This information is based on what I see visually without a lot more thought put into it...

    The power transformer appears to have 2 primary windings in parallel for 115 volt operation.
    The connections to the primary winding would have to be de-soldered and wired in series for 230 volt operation.

    Since you are asking the question - you are probably not qualified to make the change but someone who is qualified can make it fairly easily. You can hurt or kill yourself if you do it incorrectly - so get help.

    After someone makes the mod - they should test the voltages, power line leakage and ground bond test it.
  5. OK it seems to be too sophisticated for me even if i understood the problem.

    I'll probably go to see a tech.

    I don't want to hurt myself...:rollno:

    Thanks a lot for your answer.

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