Neumann.Berlin fet 80R (i) user manual

Summary of the content on the page No. 1

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

Summary of the content on the page No. 2

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 (+),

Summary of the content on the page No. 3

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

Summary of the content on the page No. 4

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