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IBM AA20790 Power Supply Ham Conversion

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    #1

    IBM AA20790 Power Supply Ham Conversion

    Hi all,
    A client sent me a pair of these things to convert for ham radio PSU's.

    They are hot swap type units. No on/off switch, they turn on when plugged into their racks.

    Had no idea how to turn them on.
    There is zero information on the net about this.

    Did it the hard way.

    Anyhow, figured it out and prepared this little article.
    These things could become very popular.

    Best part is, the units are cheap.
    Most can be had for about$20 each.

    They work good. Got a solid 14 amps out of the things at 12 volts.
    http://www.flickr.com/photos/9010884...7632915959276/

    Let me know what you think.

    Jack Crow
    "You are, what you do, when it counts"
    The Masso

    "Gravity, the quickest way down"
    Mayor John Almafi

    "You ever drop an egg, and on the floor you see it break?
    You go and get a mop so you can clean up your mistake.
    But did you ever stop to ponder why we know it's true?
    If you drop a broken egg you will not get an egg that's new?"

    MC Hawking
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    #2
    Re: IBM AA20790 Power Supply Ham Conversion

    Congratulations on your conversion. Server power supplies are usually very well built and are made to run 24-7 for years so they should serve you well. Like you discovered, the hard part is figuring out the pin-out as they do not use a standard like PC's ATX. Did you open one up to see what was inside?

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