Neumann fet 80R User Manual
Neumann-Information 1841
Operation of NEUMANN fet 80R(i) microphones in conjunction with unbalanced or Center tap grounded inputs
The
microphones of
48
Vdt
according to IEC 268-15A/DIN 45, 596.
In
Phantom
-weil as the modulation leaving the power supply
potential of +48 Vdt.
console inputs this is of no consequence.
microphones
grounded,
powering
are
the
powering voltage is shorted
the fet 80 R
both modulation
For
professional balanced and floating
connected to inputs
(i) series are
conductors
of the
are at the powering voltage
However
which
out and no
when such Phantom
have side
Phantom
powered from
microphone cable as
amplifiers and
or the Center
Operation
is possible.
NOV.
powered
I 984
tap
For Center tap grounded
NAGRA
nected without causing any negative
For
there are
1.
recorders),
connection af NEUMANN fet 80 R
the following possibilities:
Microphone
into unbalanced
transformer (1
the modulation
and
this
power
:l
line.
equipment with an input
Center
supply may be
or Center
turns ratio)
Since there are numerous
transformer
A specific
and at additional
The maximum input Signal
frequency range is
- MICROPHONE
(150.. 250a.h)
is supplied with stripped and tinned
connector will
price.
capability
30...16,000
Bu 1
INTERNATIONAL
tap
ground tan virtually always
operational results.
microphones to
operated
tap
grounded inputs, if a
of the AT 8/1
types of
be attached
Hz.
5u 1 +--20cm
DIN
microphone
to the secondary
of the AT 8/1 (i) is 300 mV at 40 Hz;
Fig.
PRIMARV
1
4 b--
transformer
unbalanced inputs,
without any
(i)
type is
input
secondary leads only.
30cm
SEKUNDARV
i
(e.g.some NAGRA
be
discon-
alterations
high quality
inserted
connectors,
on
special Order
---+
even
cable
into
this
.
GN7
Bu 1
;NTEANATIONAL
ty$ AT811 i
Bu 1
DIN
0
Soldering side vietq
Fiq. 1
CHARLOTTENSTRASSE 3 . D-l000 BERLIN 61 I POSTFACH 610469 . TELEGRAMM: NEUMANNACUSTIC
TELEFON: (030) 25993-0 . TELEFAX: (030) 25993-108 . TELEX: 184595 NEUAK D
Printed in Germany
2. Microphone and power supply may be converted to unbalanced
the field
microphone is to be used exclusively with unbalanced inputs such as
semi-professional
through a minor
or
home equipment. Fig. 2...5
alteration.
This Change is
recommebded if the
Operation
in
Fiq* 2
Standard, balanced
configuration
1
Switchcraft
A3M
.-
t-
of Neumann
Switchcroft
A3M I DIN L 152t)
f-*-
(DIN L152t 1
microphone Outputs.
1. Wire heretofore
(now modulation alone).
2. Wire heretofore
without removing the
3. Remove the Phantom
4.
Move the
to pin 3.
The
circuit
wire previously
then
Fiq. 3
connected to pin 2
connected to pin 3
wire already
powering resistors
Unbalanced
(+), remains
(-> is to
connected
(2 x 6.8 kohm).
connected to the junction of these
conforms to IEC 268-12.
connections.
be
there.
(2)
connected to pin 2
resoldered
to pin 1
resistors
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