For sale; Two ,VIZ PORTA-ISOTAP, WP28 . Isolation transformers. Rated 5amp direct and 1.5 amp isolated. Has on/off switch and fuses. Very nice like new. Great for working on those series ac/dc hot chassis radios to prevent shocks. $25.00 each plus shipping from 49405 approx 10 lbs. Thanks 73 Rick Smedberg wa8ylz