Testing a Transformer

Discussion in 'General Electronics Chat' started by Andy Larson, Mar 28, 2015.

  1. Andy Larson

    Thread Starter Member

    Mar 26, 2015
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    I pulled a transformer out of an radio's power supply circuit that I had. I was going to use it for protyping. How would one go about testing what it converts from and coverts to?
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    If it is mains input then apply power to the primary and measure the secondary(s) voltage(s), you could do a resistance check to find out if the secondaries are connected or have centre taps.
    The physical size of the core will give a rough estimation of VA size.
    Max.
     
  3. Andy Larson

    Thread Starter Member

    Mar 26, 2015
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    http://www.dropbox.com/s/o4a6zx61qemzmvx/photo mar 28, 11 35 21 am.jpg?dl=0 there you go. A photo of it
     
  4. crutschow

    Expert

    Mar 14, 2008
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    A photo doesn't help that much.
    Where were the leads connected? Did any of them go to the mains power?
     
  5. Andy Larson

    Thread Starter Member

    Mar 26, 2015
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    The black and white are mains leads sry
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
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    What does that have to do with a motor armature and where/what is the Tfmr?
    Max.
     
  7. Andy Larson

    Thread Starter Member

    Mar 26, 2015
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    I'm talking about the actual wound copper. Inside the motor on the motor shaft
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
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    What has that to do with a transformer from a radio power supply?
    Unless this is some kind of rotary convertor???
    Max.
     
  9. crutschow

    Expert

    Mar 14, 2008
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    I'm confused with this mention of a motor. :confused:

    Has this thread been broken off from another?
     
  10. Andy Larson

    Thread Starter Member

    Mar 26, 2015
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    Damnit wrong thread. I am running three atm. But thanks for the help
     
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