Founded in 1939, Radio Electric Private Limited brings nearly nine decades of engineering and manufacturing heritage, while the Radiotone brand has been established since 1980. The company specialises in variable autotransformers (Variacs) and toroidal transformers, with products largely manufactured to customer-specific requirements. Its portfolio includes three-phase air-cooled Variacs ranging up to 1,000 A, three-phase oil-cooled Variacs ranging up to 2,000 A, double-layer Variacs and tailor-made single-phase toroidal transformers ranging from 30 VA to 20 kVA. The company also manufactures specialised variable transformers, AC power sources, voltage isolation transformers, variable inductors and chokes.