30" Dumont/Crosley on eBay!!

Originally posted by jshorva65
I don't see any Sola self-regulating power transformers on any of the RA-101A's chassis assemblies. Was this transformer perhaps a postwar invention? . . .

John,

It was pre-war. I found this info on the Sola web site:

Joseph G. Sola, founder of Sola electric was both a far-sighted inventor and successful business man. Internationally recognized as the pioneer of transformer magnetics technology, his inventions and subsequent refinements of other electrical equipment were considered revolutionary by the electrical industry. Sola's first transformers for furnace ignition systems and neon lighting, based on his unique application of ferroresonant principals, led in 1938 to his invention of the constant voltage transformer. This timely discovery was eagerly accepted by prime military contractors during World War II, and established Sola as a world leader in voltage regulation. Sola was awarded 55 U.S. Patents during his lifetime, including five each for constant voltage transformers, Solatrons, electronic power supplies and 19 for high-intensity discharge lighting ballasts.