Wet Transformer

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A wet transformer is a special type of transformer that is used to couple telephone equipment to electronic equipment. It is made with a primary winding that is designed to have a DC voltage impressed upon it. It is also made with a special type of magnetic core that is not seen in usual transformers. It has a specific 600Ω input impedance which matches the telephone equipment. The output of some of these transformers are at 1KΩ and at line level.