Mr. Hirsch was literally present at the creation of the audio industry, which was far from industrial when he first encountered it in the late 1940s. He had received a B.E.E from the Cooper Union in 1943 and served as an officer in the Army Signal Corps. After mustering out of the service, Mr. Hirsch developed laboratory instruments for the developing field of spectral analysis.
He had become entranced by amateur radio at the age of 14 and naturally…