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About us | ALDETRONICS Your Online Shop For Variable Transformers, Variacs, Isolation Safety Transformers, Power Supplies
![Circuit-VARIABLE ISOLATED AC VOLTAGE SPANS 0VAC TO 280VAC __ Circuit designed by David A. Johnson, P.E. Circuit-VARIABLE ISOLATED AC VOLTAGE SPANS 0VAC TO 280VAC __ Circuit designed by David A. Johnson, P.E.](http://www.discovercircuits.com/DAJ-Schematics/variac.jpg)
Circuit-VARIABLE ISOLATED AC VOLTAGE SPANS 0VAC TO 280VAC __ Circuit designed by David A. Johnson, P.E.
![About us | ALDETRONICS Your Online Shop For Variable Transformers, Variacs, Isolation Safety Transformers, Power Supplies About us | ALDETRONICS Your Online Shop For Variable Transformers, Variacs, Isolation Safety Transformers, Power Supplies](https://www.aldetronics.co.uk/wp-content/uploads/2016/01/variable_isolation_transformer_safety_IT-15_production_aldetronics.png)
About us | ALDETRONICS Your Online Shop For Variable Transformers, Variacs, Isolation Safety Transformers, Power Supplies
![Vintage Heathkit Variable Isolated AC Power Supply, Model IP-5220, 0 - 140VAC With Isolation, Made In USA, Circa 1975 - 1983 | Vintage electronics, Ac power, Power supply Vintage Heathkit Variable Isolated AC Power Supply, Model IP-5220, 0 - 140VAC With Isolation, Made In USA, Circa 1975 - 1983 | Vintage electronics, Ac power, Power supply](https://i.pinimg.com/originals/49/d3/d3/49d3d3d33095545aa23a017837dc8e08.jpg)