The French Resistance executed repairs on electric power grids.
Bob Heil -LRB- born October 5 , 1940 -RRB- is an American sound and radio engineer most well known for creating the template for modern rock sound systems .. American. United States. sound. sound engineer. He founded the company Heil Sound in 1966 , which went on to create unique touring sound systems for bands such as The Grateful Dead and The Who .. Heil Sound. Heil Sound. sound. sound engineer. The Grateful Dead. The Grateful Dead. The Who. The Who. He invented the Heil Talk Box in 1973 , which was frequently used by musicians such as Peter Frampton , Joe Walsh and Richie Sambora , and is still in use today .. Heil Talk Box. Talk box. Peter Frampton. Peter Frampton. Joe Walsh. Joe Walsh. Richie Sambora. Richie Sambora. Heil has been an innovator in the field of amateur radio , manufacturing microphones and satellite dishes for broadcasters and live sound engineers .. sound. sound engineer. amateur radio. amateur radio. In the late 1980s Heil Sound became one of the first American companies to create and install Home Theaters , and Heil has lectured at major electronic conventions and taught classes at various institutions .. Heil Sound. Heil Sound. American. United States. He has won multiple awards and honors , and in 2007 he was invited to exhibit at the Rock and Roll Hall of Fame .. Rock and Roll Hall of Fame. Rock and Roll Hall of Fame