Atkins in the phone book. After making contact and meeting, Atkins sold a brand new Fender Twin amplifier to buy the second Echosonic amp, which he went on to use in many famous recordings, including his rendition of "Mister Sandman". The next year, Elvis Presley's guitarist Scotty Moore was the next big name to start using the EchoSonic, which he did on most of Elvis' late Sun and early RCA singles, in addition to the 1968 comeback special. Butts's tape-loop technology was the basis for the later Echoplex, for which he received a "nominal sum" from the manufacturers. Though it has been represented in error by some authors in later years, Butts had received a U.S. patent for his tape echo technology in 1957. Gretsch Filter'Tron pickup In 1954, Gretsch began plans to produce the first Chet Atkins-endorsed guitar model, the Gretsch 6120. Atkins recorded much of his music of the 1950s with the Echosonic, and had serious hum problems caused by the single-coil pickups and an unshielded transformer in the amplifier. Butts finally connected two single-coil pickups serially and out of phase, creating the first humbucker. Butts did not receive a patent until later, when it became the Gretsch Filter'Tron, and Gibson is often credited with developing the first humbucker. Throughout the early years of production, Butts insisted on making all the Filter'Tron pickups by hand. Mass production of the Gretsch Filter'Tron (or simply Filtertron) pickup began in 1957. References Dickerson, Deke (2013). The Strat in the Attic: Thrilling Stories of Guitar Archaeology. Voyageur Press. pp. 146–147. Hunter, Dave (2006). The Electric Guitar Sourcebook: How to Find the Sounds You Like. Hal Leonard Corporation. p. 47. Hunter, Dave (2013). 365 Guitars, Amps & Effects You Must Play: The Most Sublime, Bizarre and Outrageous Gear Ever. Voyageur Press. p. 62. External links http://www.scottymoore.net/Ray_Butts_interview.html http://www.guitarplayer.com/article/scotty-moore/8027 Engineers from Illinois American accordionists 1919 births 2003 deaths American country singer-songwriters People from Cairo, Illinois Singer-songwriters from Illinois 20th-century American singers 20th-century American engineers 20th-century accordionists 20th-century American inventors Country musicians from Illinois People from Attala County, Mississippi Singer-songwriters from Mississippi