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Re: [TCML] Subject: Overheated Secondary

Hi Marko,

I suspect a secondary short (and then the overheating occurred). This would be the norm.

Just unwind a few layers (about 100V loss per layer I expect). Also, don't pot until you measure output. The windings have to be put on in the correct winding polarity (which if you didn't mark their direction before you took it apart you may have to do a quick trial and error test to get it right).

Take care,
I depotted my transformer and began cleaning it up. It does not look like the one Bart photographed. My transformer has two primary coils in parallel and two secondaries in series. One secondary overheated. It never went open (until I worked on it) . The insulation is gone from the outer layers of the winding.
Not sure how deep the damage goes, it is too cold to work on it lately.


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