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110v -> 230v? step up recommendations pls

Discussion in 'Amps and Cabs [BG]' started by David Wilson, Feb 9, 2003.


  1. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    First of all, I feel really dumb.

    I recently upgraded from combo setup to pre/power/cab setup. As part of this, I've been trying out a bunch of preamps to find the one that best suits my needs.

    Good news: I managed to get a used Warwick Quadruplet at a good price.
    Bad news: Due to a chronic piece of transatlantic French / English misunderstanding, it needs 230V. I did ask about this before the purchase, and thought it was a dual voltage version but it seems like we got our wires crossed.

    I've emailed Dana B Goods here to see if it's possible for them to convert it. Should this not be possible, I'm guessing I'm going to need a step up transformer to run it. Anyone have any recommendations?
     
  2. Weird. I think it would be possible if they replace the PS. That's weird that it doesnt' have a switch.
     
  3. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Got an email back from Warwick tech support...

    I don't think I'll be doing this one myself ;-)

    Now, if anyone has any recommendations for good electronic repair shops in the NYC area I'd love to hear them
     
  4. Good luck with the change, and hope it's not not difficult to do..

    btw. Most of the electronic stuff in my house are dual voltage.. inc. my amps.
    But that's because they are American and Mexican made, for being used in Southamerica.
     
  5. redjeep!

    redjeep! Guest

    Jan 19, 2002
    Dublin
    This is a really easy modification to make (but I would still strongly advise you not to do it yourself).

    Most transformers for gear these days has two windings on the primary side, which translated means that you've got two wires and a total of four ends on the side of the transformer that connects to mains. These wires are obviously veeeeerrry long and wound together in a coil.

    Connected together one way means that it will run of 110v and connected the other it will run off 220/ 240v.

    Bottom line, is that any decent tech could do it, it should take longer to get the case of the amp and for his soldering iron to warm up than to do the change over . So don't get overcharged, I'd be upset if I had to pay much more than $20.

    Failing this, you can leave it alone and sell it to me....

    Hope this helps,
    Andy
     
  6. BillyB_from_LZ

    BillyB_from_LZ Supporting Member

    Sep 7, 2000
    Chicago
    Did they mention a change in fuse rating too? Generally the fuse would need to double in current rating since the primary current will increase.
     
  7. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Andy,
    thanks for that. I'm actually pretty good with a soldering iron, thanks to a childhood helping my dad do household repair stuff. Of course, back then I didn't know _what_ I was soldering.

    If it's really that easy, maybe I could do it myself. If I posted pictures of the guts, would you mind taking a look?
     
  8. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Yup. I'm not at the preamp right now, but there were two lines of text on the back of the unit saying what the fuse ratings should be for the different input voltages.

    cheers
     
  9. BillyB_from_LZ

    BillyB_from_LZ Supporting Member

    Sep 7, 2000
    Chicago
    Pictures....must...have...pictures....

    You know we love pictures!!!!!

    Be happy to take a look.

    BTW, do you have a multimeter (and know how to use it)?
     
  10. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    And I'm happy to feed your picture habit ;-)
    I'll take photos of the guts and post them later tonight.

    Yes and Yes
     
  11. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
  12. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    the vertical writing on the section next to the plug says 'use only with a 250v fuse'
     
  13. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    left side of the circuit board..
     
  14. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    right side of the circuit board
     
  15. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    rear of the circuit board...
     
  16. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    Transformer from front.
     
  17. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
    transformer from right
     
  18. David Wilson

    David Wilson Administrator Staff Member Administrator Supporting Member

    Oct 14, 2002
    Lower Westchester, NY
  19. BillyB_from_LZ

    BillyB_from_LZ Supporting Member

    Sep 7, 2000
    Chicago
    Thanks for the pix...

    I need some help to understand the wiring better...

    On the left side of the transformer (as viewed from the front of the preamp) there are what I believe to be two pairs of wires coming out of the transformer with black sleeving on them. Are there two wires in each?

    These....
     
  20. BillyB_from_LZ

    BillyB_from_LZ Supporting Member

    Sep 7, 2000
    Chicago
    I also need to know what happens with the wiring around the switch...

    Are there two wires (one from each sleeved pair) that connect together up there or ?

    If you could take a photo from the back side of the switch, that might help.

    Darn Warwick did such a nice job it's hard to see what goes where without holding this in my hands.