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PostPosted: October 12th, 2020, 5:36 pm 
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Joined: January 14th, 2015, 11:15 pm
Posts: 499
This was interesting.

https://www.youtube.com/watch?v=sDE2uekqLsA

After I watched it I realized that if he is correct, the simple way to test would be to put a compass next to the transformer with the AC disconnected. If the needle deflects that would indicate that the core of the transformer has been magnetized by DC.

ray


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PostPosted: October 12th, 2020, 7:32 pm 
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Joined: January 15th, 2015, 7:19 am
Posts: 1697
Location: Baltimore MD
With AC going through the transformer then the magnet could never form


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