Re: Transformer winding insulation

"sbrehler"

Am I correct in that the winding wire in a transformer is coated with a
varnish that acts as an insulator?

** Yep - it is actually an "enamel" coating, sometimes made from
polyurethane.


I've tried to find an answer to this by researching transformer
construction, but haven't been able to get anything definitive.


** Just look up "enamel winding wire".


If this is so, then I would think that winding ones own x-former would be
a tedious undertaking when the slightest knick would possibly render the
thing useless.

** Nope - enamel coated winding wire is remarkably tough and flexible.


Perhaps that's why not many people wind their own?


** Cheaper and easier to buy a mass produced transformer on most cases.

But folk often wind their own RF coils and small inductors for loudspeaker
x-overs.




...... Phil



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