Neumann U47neumann u47, neumann u47 tube microphone
The U 47 was a large-diaphragm condenser microphone manufactured by Georg Neumann GmbH during the years 1949-1965
The U 47 used the M 7 capsule originally developed for the CMV 3 microphone "Neumann bottle" Its PVC membranes unfortunately tended to dry out with age, however, and in 1960 the M 7 was superseded by the K 49, a capsule with similar acoustical design but membranes made of age-resistant biaxially oriented PET film The U 47's circuitry was based on the Telefunken VF 14 M vacuum tube a specially-selected VF 14; the VF 14 was an RF pentode for various functions in military field radios1; the discontinuation of the U 47 was caused primarily by the decision by Telefunken to halt production of the VF 14 In some ways the functional successor to the U 47 was the U 67
Custom tubes equivalent to the VF14 have been manufactured specifically for the U 47, by Telefunken23 and others4 Beginning in 1962, Neumann offered a fully functional Nuvistor, small signal receiving tube replacement kit for the VF14 and required minor circuit modification3
The U 47 is well known for its clear sound, with a distinct emphasis in its upper-midrange frequency response It has been used in countless famous recordings The Beatles' producer George Martin used the U 47 extensively in the group's recordings and claimed it was his favorite microphone5
The U 48 was identical to the U 47 except for the available polar pattern combinations cardioid and figure of eight instead of cardioid and omnidirectional According to Neumann: The Microphone Company by Anselm Roessler,6 the U 48 was not introduced by Neumann until 1957 However, according to representatives at Georg Neumann GmbH, examples of the U48 existed as early as 1950
The U 47 fet, a solid-state microphone with yet a third capsule, the K 47, had a headgrille identical to that of the original U 47 but with solid-state circuitry; it was produced by Neumann during the years 1969-1986 It was intended to recapture the sound of the original U 47, but enjoyed only limited success However, the U 47fet became well known among recording engineers as a bass drum mic If used on the outside of the bass drum or bass drum head if there was no hole cut in the bass drum head, and in conjunction with a primary bass drum microphone, which would usually be placed on the inside, or close to the inside of a bass drum or a bass drum head, mixed together would make a complete bass drum sound The U 47fet also gained great popularity among double-bass players in the jazz world
The microphone is featured on many Frank Sinatra album covers and songs including "I Got You Under My Skin" 7
- ^ wwwneumanncom: Discussion of VF14 and other valves for U 47
- ^ TELEFUNKEN Elektroakustik introduces the VF14K
- ^ a b Telefunken: TELEFUNKEN U47M EF14
- ^ Saturn RV-14m, designed specifically to replace the VF14m in the U 47
- ^ http://wwwrecording-microphonescouk/Neumann-U47-tubeshtml
- ^ Roessler, Anselm Neumann: The Microphone Company Bergkirchen, Germany: PPVMEDIEN, 2003
- ^ http://wwwsoundonsoundcom/sos/dec12/articles/classic-tracks-1212htm Missing or empty |title= help
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