power supply HELP

Discussion in 'General Electronics Chat' started by goofydad207, May 17, 2010.

  1. goofydad207

    Thread Starter New Member

    May 17, 2010
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    A little help please i am building a 10 meter linear amplifier that needs a 13.8 volt 80 amp input :D I also need to build a power supply to handle it so i feel it needs at least a 13.8 v 100amp power supply to operate it effectively!! Does any one have a link to plans or plans them selves that i can use. I have a old (vintage power supply (tube type)) for some hv ac output although i havenot checked the output of this unit the outputs come out of the unit as a tube type connectors 11 pin or 16 pin. It maybe a good start!
     
  2. kingdano

    Member

    Apr 14, 2010
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    10 meter amplifier?

    what does that mean?
     
  3. retched

    AAC Fanatic!

    Dec 5, 2009
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  4. SgtWookie

    Expert

    Jul 17, 2007
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    Get a truck or golf cart 12v battery, a 130 Ampere GM alternator, and a 2-1/2 HP electric motor. Spin the alternator using the electric motor and a V-belt drive. You'll need to spin the alternator at between 6,000 to 9,000 RPM to get decent power out of it while keeping the air pumping through it to keep it cool.

    Power the motor using 240V.
     
  5. kingdano

    Member

    Apr 14, 2010
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    :eek:

    holy electronics maniac batman
     
  6. someonesdad

    Senior Member

    Jul 7, 2009
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    If you're willing to throw a little money at the problem, see if you can parallel two of these.
     
  7. SgtWookie

    Expert

    Jul 17, 2007
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    If he's going to spend that much, might as well get a quality unit, like this one:
    http://parts.digikey.com/1/parts/1207868-pwr-sup-fnt-end-12v-1200w-100a-th120012.html
    I like Lambda supplies. Not cheap, but not likely to break, either.

    Datasheet: http://us.tdk-lambda.com/lp/ftp/Specs/th.pdf
    You can adjust the output voltage anywhere between 10.4v and 14v inclusive.

    1% regulation at 100A output is pretty darn good, I'd say. Power factor is .99, 88% efficiency at full load.

    Trying to build a supply like that at home would be a major engineering effort. You'd probably wind up spending 3x that much and the resulting supply would not be nearly as efficient or reliable.
     
    Last edited: May 18, 2010
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