Instruction d'utilisation Neumann.Berlin fet 80R (i)

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Neumann-Information 1841
NOV. I 984
Operation of NEUMANN fet 80R(i) microphones in conjunction with unba-
lanced or Center tap grounded inputs
The microphones of the fet 80 R (i) series are Phantom powered from
48 Vdt according to IEC 268-15A/DIN 45, 596.
In Phantom powering both modulation conductors of the microphone cable as
-weil as the modulation leaving the power supply are at the powering voltage
For professional balanced and floating amplifiers and
potential of +48 Vdt.
console

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2. Microphone and power supply may be converted to unbalanced Operation in the field through a minor alteration. This Change is recommebded if the microphone is to be used exclusively with unbalanced inputs such as semi-professional or home equipment. Fig. 2...5 Switchcraft (DIN L152t 1 A3M .- t- Fiq* 2 Standard, balanced configuration of Neumann microphone Outputs. Switchcroft A3M I DIN L 152t) f-*- 1 (2) Fiq. 3 Unbalanced connections. 1. Wire heretofore connected to pin 2 (+),

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Far microphones equipped with connectors per DIN 41524 (Binder, Mini- Tuchel), the following changes are necessary: 1. Wire heretofore soldered to pin 3 (-1 is to be resoldered to pin. 2 without removing the wire already connected there. 2. Wire heretofore connected to pin 1 (+> is to bt-: resoldered to pin 3. 3. Remove the Phantom pawering resistors. 4. Install a new wire from the junction of these resistors to pin 1. The circuit then corresponds to DIN 45594 Type L. The IC 3, IC 4, KT

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Audio Modulation cable to the amplifier, tape recorder etc. equipped with unbalanced input: i DIN‘L152L 1 Switchcraft w Modulation Schirm Shield Fig. 5 3. Should the use of a transformer as recommeded in example #l not be desi- rable or the microphone put out’modulation voltages beyond those permis- sable for the AT 8/‘l (i) transformer, then you may block the 48 Vdt phan- tom power from your input through the use of blocking capacitors: ( DIN L152L 1 Switchcroft -iz3L-dbfF (3) I I