toroidal transformer

Discussion in 'General Electronics Chat' started by misael.mata, Sep 20, 2014.

  1. misael.mata

    Thread Starter Member

    Aug 26, 2014
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    will a bad toroidal transformer cause transistors to overheat and burn in a amplifier circuit.......
     
  2. #12

    Expert

    Nov 30, 2010
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    It depends on what the transformer is being used for. If it's the power supply transformer, a failure will cause its voltage to fail and the associated transistors will run cooler while the transformer burns up.
     
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  3. crutschow

    Expert

    Mar 14, 2008
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    As #12 says, if it's a power transformer it's failure is quite unlikely to cause overheating and circuit failure.
     
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  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    In what way do you suspect the transformer is Bad?
    Max.
     
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  5. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    of all things that can go bad, it is rarely the transformer putting out too much voltage - I have never seen that. Too much current draw through the transistor (to few ohms on the load) is usually the cause.
     
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  6. misael.mata

    Thread Starter Member

    Aug 26, 2014
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    well with transformer on, the transistors get hot enough to burn my finger, and i put a multimeter on the transformer to check its resistance and iam not getting a reading. if its not the transformer than what else would cause transistors to burn up, ive checked all caps and and resistors.
     
  7. #12

    Expert

    Nov 30, 2010
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    Please be reasonable. We don't know whether you are working on a childs' toy or the computer that runs the Coca-Cola bottling factory in Atlanta Georgia. How are we supposed to guess what went wrong???
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
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    ...And that makes little sense either?
    Max.
     
  9. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    Not getting a reading as in, zero ohms or infinite ohms? Are you getting an AC voltage when your hot transformer is running? What else is getting hot? A large transistor, the output load, the rectifier diodes (diode bridge ), a section of the pcb.
     
  10. misael.mata

    Thread Starter Member

    Aug 26, 2014
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    okay so now i swapped out the transformer and all seems okay, the transformer had a shorted winding, thanks for the help guys, the amplifier is up and running
     
  11. tom_s

    Member

    Jun 27, 2014
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    always good to see a happy ending
     
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