I have one each of the following 120v in 28v out. Came from heath 27" TV tested good. $8 + s/h 54-1048 must be an isolation unit as the windings are almost identical. Came from heath 27" TV. Tested ok at 120v in 120v out. $15 + s/h 54-814 10-15 amp filament trans. Not sure on the current rating. New in box. $20 + s/h Reply direct Rudy