Why do transformers hum?

Discussion in 'General Electronics Chat' started by Sparky49, Oct 27, 2011.

  1. ISB123

    Well-Known Member

    May 21, 2014
    1,235
    545
    My 240V/24V transformer started humming today,after opening the case I found out that PCB got lose and one of the capacitors rested on transformer which caused the humming.
     
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