Neumann U47 fet
Supercardioid Condenser Microphone
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.
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. (Read more about the K47/K49 capsule.)
This is a dual-diaphragm, large diaphragm (34mm OD) capsule with a single, shared backplate and center-terminated 6-micron Mylar diaphragms. Because the U47 Fet was a fixed Cardioid microphone, Neumann used K47 capsules (designed “K47Fet”) whose rear sides did not meet specifications for use in multipattern mics. Therefore, unlike a multipattern K47 mic, a dirty or abused U47Fet capsule cannot be rotated 180°.
Aside from the ratio of the BV8 you find in the U47, the winding technique of the fet 47’s transformer differs too. The Fet47 [transformer] is more [closely] related to the BV12 you find in the U67.
There are a couple of different BV8 revisions, but all of them share the multiple-chamber winding technique, [whereas] the Fet47 [transformer] and the BV12 are just plain old mantle [transformers].
Two versions of the microphone were sold:
- U47 fet i - male XLR connector
- U47fet - male DIN 41524 (Tuchel) connector
The capsule is shockmounted within the headbasket to reduce mechanical interference.
The mic was manufactured from 1969 through 1986.
U47 FET exploded view: photo courtesy Hansén Audio, Sweden
The Neumann U47 fet is also known as: 47fet, U-47-FET, fet47, U-47fet, .
The mic was released in 1969.
|Frequency Response - SupercardioidClick Graph to Compare!|
|Pickup Patterns||Pads & Filters|
(8 mV/Pa; 40 - 16,000 Hz)
| Capsule diameter: 34mm
||150 Ohms (Low)|
|710g (25.04oz)||160mm (6.30'')||63mm (2.48'')||
Did we get anything wrong on this page? Please let us know!