Best cheap Bench PSU

Discussion in 'General Electronics Chat' started by MABDALLA, Mar 16, 2014.

  1. MABDALLA

    Thread Starter New Member

    Jan 21, 2014
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    In need of a bench psu 0-30v and up to 10amps atleast

    I seen quite a few on ebay…but its important that i get one that is close as possible to be accurate

    Ive never owned a bench power supply and need advice from those of you who have

    thanks.
     
  2. MABDALLA

    Thread Starter New Member

    Jan 21, 2014
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  3. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
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    Check out Mastech power supplies ... Most times Google the power supply and you will find plenty of reviews and different ones too...
     
  4. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    That's 5amps and a switcher too.
    A switching one will work for you but it all depending on your types of projects.
     
  5. Zerotolerance

    Member

    Sep 18, 2011
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    For cheap disposable go with a Mastech
     
  6. GRNDPNDR

    Member

    Mar 1, 2012
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    Last edited: Mar 17, 2014
  7. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
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    Please Explain???
     
  8. MABDALLA

    Thread Starter New Member

    Jan 21, 2014
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    Yea everyone says Mastech…I suppose it will need some modifications what i need is for testing laptop motherboards…I need to inject anywhere between 1 to 20vs up to atleast 10amps at times…i need it to be accurate as possible …what mods should i consider doing to achieve this?
     
  9. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    We used then at nat Semi. They worked pretty well.
     
  10. Zerotolerance

    Member

    Sep 18, 2011
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    MasTech is a good hobbyist power supply. So, If you don't have a daily need for a PSU I would go with MasTech. Nothing really wrong with them, just don't think they can take the constant abuse to well if thats your intent. I re-read your subject line. MasTech is the best cheapest PSU you can buy. I don't think they have the best circuit protection in them.
     
  11. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    After you repair it the first time and put in larger spec components and better cooling it will probably last 20 years. :)
     
  12. MABDALLA

    Thread Starter New Member

    Jan 21, 2014
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    anyone have experience with ATTEN?
     
  13. GRNDPNDR

    Member

    Mar 1, 2012
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    Not to derail this thread, but what would need to be replaced in a 30V 5A power supply to give it higher current? say maybe 10 or 20A?

    Possibly even higher voltage?
     
  14. Zerotolerance

    Member

    Sep 18, 2011
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    I would assume quite a bit of components would need to be replaced to accomplish that.
     
  15. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    Hmm.!

    How about the bridge & caps & SMPS Tx & rectifiers and the whole current limit circuit or may be software and the casing plus PCB wires and tracks.

    Basically not much but the whole supply in short.
     
  16. Zerotolerance

    Member

    Sep 18, 2011
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    I agree. Doubt the traces alone could even carry that many amps.
     
  17. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    Basically the entire machine. Heatsinks, chassis, power transformer, power transistors.
     
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