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Thread: Regarding 110v to 220v conversion (XT PSU)

  1. #1

    Default Regarding 110v to 220v conversion (XT PSU)

    Hi,

    Is this possible to achieve ?

    My XT is currently running on 110v via a transformer. I have no switch at the back where it can be switched to 220v. Do you think the hardware for 220v is still there or do I need to replace the PSU if I want 220v instead of 110?
    Current machines:
    PCs: IBM PC XT 640K, IBM PC XT 256K ,IBM PC XT , 2x IBM PC AT, Compaq Portable I, Compaq Portable II, Compaq Portable I/286, Philips Logic Analyzer XT clone, IBM PS/2 Model 30 286 , HP 95X, HP200LX (2x),Compaq SLT/286.
    Apple: Macintosh 512k, Macintosh SE, Macintosh Classic, PowerBook 170, iBook Clamshell, iBook G3,iMac G4 , TiBook's, Apple IIc, Many newer machines (G4, G5, Intel..), 20th Anniversary Mac
    Others: Commodore 64C,Amiga A500, CCS S-100 System, SNES,

    Wanted: Macintosh 128k, Hard Disk 20, System disks and games for the Mac

  2. #2
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    Default

    Quote Originally Posted by QuantumII View Post
    Hi,

    Is this possible to achieve ?

    My XT is currently running on 110v via a transformer. I have no switch at the back where it can be switched to 220v. Do you think the hardware for 220v is still there or do I need to replace the PSU if I want 220v instead of 110?
    It depends. Some IBM power supplies (I forget which ones) have jumpers on the PSU board itself to change to 220v operation. Have a peek. Make sure you don't have one of the models with a 120vac fan.

  3. #3
    Join Date
    Dec 2007
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    Default

    Unless the PSU is designed to run from 220V I wouldn't risk it, just run it using the transformer. If there's no switch there's a possibility it may work on 220/240v but unless there's actually a label stating this I doubt it. I do have a few monitors which claim to work from a 100 - 240v supply but I've not actually seen a PC PSU claiming this capability without a switch.




    BG

  4. #4

    Default

    Ok. I'll investigate it the next time I'm going to install a card in it (a few days from now)

    It's a hassle to drag it down from it's home on my desktop right now
    Current machines:
    PCs: IBM PC XT 640K, IBM PC XT 256K ,IBM PC XT , 2x IBM PC AT, Compaq Portable I, Compaq Portable II, Compaq Portable I/286, Philips Logic Analyzer XT clone, IBM PS/2 Model 30 286 , HP 95X, HP200LX (2x),Compaq SLT/286.
    Apple: Macintosh 512k, Macintosh SE, Macintosh Classic, PowerBook 170, iBook Clamshell, iBook G3,iMac G4 , TiBook's, Apple IIc, Many newer machines (G4, G5, Intel..), 20th Anniversary Mac
    Others: Commodore 64C,Amiga A500, CCS S-100 System, SNES,

    Wanted: Macintosh 128k, Hard Disk 20, System disks and games for the Mac

  5. #5

    Default

    Quote Originally Posted by QuantumII View Post
    My XT is currently running on 110v via a transformer.
    I have an American-gifted IBM-PC in the same situation. I run it on a step-down transformer which outputs 110v. My power supply doesn't have a switch, but I don't mind using the transformer. The physical size is not large considering the size of the machine itself.

    One fear is that I'll die suddenly, and whoever inherits the collection will one day plug it in simply by connecting it up to the wall socket with a standard power cord.

    Then sparks will fly.

    Tez
    ------------------------------------------------
    My vintage collection: https://classic-computers.org.nz/collection/
    My vintage activities blog: https://www.classic-computers.org.nz/blog/
    Twitter: @classiccomputNZ ; YouTube Videos: (click here)


  6. #6
    Join Date
    May 2006
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    Hamilton, Ontario, Canada
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    Default

    Like you'll care, being dead like you would be LOL
    Legacy Computers and Parts

    Sales of, parts for, and repairs to, Vintage and Legacy computers.

  7. #7
    Join Date
    Apr 2005
    Location
    Stevens Point, Wisconsin
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    2,315

    Default sparks

    tezza said...Then sparks will fly
    So just make sure the most obvious power cord laying around is connected to a couple of paddles strapped to your chest. Then, when your time has come, and they come to plug the tantalizingly obvious power cord in...
    patscc

  8. #8

    Default

    Quote Originally Posted by Druid6900 View Post
    Like you'll care, being dead like you would be LOL
    Are you saying I wouldn't regard the destruction of a pristine 5150 a tragety even if I wasn't around to mourn it?

    Shame on you!

    Tez
    ------------------------------------------------
    My vintage collection: https://classic-computers.org.nz/collection/
    My vintage activities blog: https://www.classic-computers.org.nz/blog/
    Twitter: @classiccomputNZ ; YouTube Videos: (click here)


  9. #9

    Default

    Quote Originally Posted by patscc View Post
    So just make sure the most obvious power cord laying around is connected to a couple of paddles strapped to your chest. Then, when your time has come, and they come to plug the tantalizingly obvious power cord in...
    patscc
    Lol. I have it on good authority that some want to do this BEFORE my time has come!

    Tez
    ------------------------------------------------
    My vintage collection: https://classic-computers.org.nz/collection/
    My vintage activities blog: https://www.classic-computers.org.nz/blog/
    Twitter: @classiccomputNZ ; YouTube Videos: (click here)


  10. #10
    Join Date
    Nov 2003
    Location
    London, England
    Posts
    1,348

    Default

    Stick a 110V sticker on the back!

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