VIZ WP-31A Isolation Transformer

Use to isolate power source from units ..in this case three unit ..guards against power surges and electric noise

Maybe the old owner had health care equipment or used on stereo ??

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I tinker with old tube equipments. I sure would like to have it. It's worth about $200.

 

Here is a similar model.

https://www.ebay.com/itm/Vector-VIZ-WP-31D-Isolation-Transformer-190-260VAC-output-input-220-250V-1050W-/252531624931