Kudelski, Stefan

Kudelski, Stefan In 1951, a Polish immigrant named Kudelski was a physics student at what is now the Swiss Federal Institute of Technology at Lausanne. That year, he built the first portable and self-contained audio recorder (using a wind-up motor), thereby freeing on-sight recording engineers from dependence upon power-line electrical sources or electrical generators. He named the recorder the Nagra, which in Polish means “will record,” started a business, and began producing the device, but…