According to Andreas Grosser, at least 5 different models of output transformer were used within the U 47. Whether that was a functional microphone, or whether its capsule and circuit were similar to what was commercially released, is not known. U47/U48 Studio Set. The K47 capsule used a single, shared backplate, which caused tensioning challenges, in that both diaphragms would have to be tuned identically to produce balanced Figure-of-8 or Omni patterns. There were about 5000 [U-47s] made, about 3200 long bodies and the rest short. Maximum SPL (for 1% THD): 125 dB. Non-microphonic VF14 tubes would become hard to find within a few years, leading to changes to the U47 design as well as the introduction of the U47fet, a FET condenser intended to sound the same as its tube-circuit sibling. PVC ages poorly, and as early as 1958 the Neumann factory was using the M7’s successor, a capsule known as the K47/49, which used a metallized polyester diaphragm. Whitefish, MT, September, 2011 – Brett Allen, producer/engineer and founder of Montana’s SnowGhost Studios, has purchased the first U47/48 large diaphragm tube microphone Studio Set. A frequency-response graph comparing the VF-14K to a VF-14M in a vintage U47 shows less than 1.5dB of variation from 70Hz–24kHz; the VF-14K has slightly more LF output below 70Hz. Please let us know! Did we get anything wrong on this page? Neumann took over distribution in the 1950s; the mics distributed by Neumann bear a Neumann logo. The 47fet was intended to be a phantom-powered, FET version of the U47 tube microphone, designed a few years after the VF14 tube at the heart of the U47 became unavailable. Power Source: External Power Supply. There’s no room for anything in there. If you pull the covers off you won’t believe; they’re packed. See the history of the M49 for more information. If you take exactly the same mic that’s five or six years younger, take the shell off — you’ll wonder where the mic went. TELEFUNKEN Elektroakustik is proud to offer the U47/U48 Studio Set of microphones. All of these accoutrements show that this microphone means business. The large, chrome head grille houses a newly manufactured M7 capsule. Each system includes a U47 and U48 microphone matched in frequency response. Units produced before 1950 were … The mic went through three revisions. The original series, manufactured by Georg Neumann GmbH between 1949 and 1965, employed a tube design; early U 47s used the M 7 capsule, then replaced by the K 47 from 1958. Each system includes a pair of U47 microphones matched in frequency response. Telefunken U47 Multi-Pattern Tube Condenser Microphone. Each U47 microphone comes complete with M 940H power supply, M840TH 25’ Sommer tube microphone cable, M740 shock mount, FC40 locking flight case and WB40 wooden microphone box. The Telefunken U 47 was a two-pattern tube condenser microphone developed by Neumann. Its matte nickel finished body houses a new BV8 output transformer and a newly developed VF14k vacuum tube; a "plug and play" replacement for the rare VF14M tubes found in the original. Every component in each of the two TELEFUNKEN U47 microphones is hand-selected, allowing as close a match as is possible between each system. The term “Kugel,” which translates to “ball,” indicates Omnidirectional. Therefore, many early U47s bear the Telefunken logo. Specifications The approximate physical dimensions of the U-47 are as follows: The U47 was manufactured by Neumann, but initially distributed by Telefunken. Like the U 47, the fet model used Neumann’s K47 capsule, variously referred to as the K 47, K 47/49 and K 47fet. Frequency Range: 20 Hz – 20 kHz, ±3 dB. Each system includes a U47 and U48 microphones matched in frequency response.