Antonio Vernucci wrote:

Thanks, reading those discussions and other references, it was possible to
determine that single-ended audio transformers must have a gap in the magnetic
path, this fact making power transformers generally unsuitable for that
application.

Yes, but it IS possible to to cut a gap into an existing EI core
transformer.

The problem is that when you do it, ALL of the transformer parameters
will change.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."