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UNIDIRECTIONAL DYNAMIC MICROPHONES
222
HARTREY
AVE.,
EVANSTON.
IL.
60204
U.S.A.
AREA
CODE
312/866-2200
.
CABLE:
SHUREMICRO
TWX:
910-231-0048
TELEX:
72-4381
GENERAL
The Shure Models
515SBG and 515SB-GI8 UNI-
DYNE'?
B Microphones are low-impedance units de-
signed specifically for flexible gooseneck application.
The microphones are moving coil units providing good
reproduction of music and voice.
DATA
MODELS
515s~~
SHEET
and
515SB-GI8
UNIDYNE~
B
These microphones are particularly suitable for use
in language lab systems, paging applications, and
base station communications. They are highly recom-
mended for
talkback and cuing from professional
control rooms in TV, film, and recording studios, and
other uses demanding a customized installation with
concealed cables.
i
Features:
True cardioid pickup pattern: symmetrical about
axis and uniform at all frequencies
Response especially effective for announcing,
narration, paging and music
Cartridge shock-mounted for quiet operation
R
Built-in, non-locking, push-to-talk switch con-
trols both microphone circuit and relay or
control circuit
R
Dependability and ruggedness under all oper-
ating conditions
A 457 mm (18 in.) flexible gooseneck and a con-
venient mounting flange supplied with the Model
51
5SB-GI 8
MOUNTING
To mount the
515SBG microphone on a gooseneck
having a
5/8"-27
thread, unscrew black end cap from
microphone (see Figure 1-A), remove adjacent thin
metal washer and one metal spacer from terminating
end of cable. Slide the thin metal washer removed
previously onto cable up into end of microphone. Slip
gooseneck over cable and install into end of micro-
phone.
L373
,,
Dl,
(1-5/32 IN1
127/32
IN
1
FIGURE 1-A
159
mm
---
-
476
mm-
1
3m
(6-114
IN)
(18
3/4
IN)
T
--
L
373mm
OIA
3
HOLES
[45mm(177
IN)
DlA]
(1-15/32
IN)
EQUALLY
SPACED
ON
MODEL
515SB-Gi8
159
mm
(5/8
IN)
RADIUS
CIRCLE
-
OVERALL
DIMENSIONS
FIGURE
1-B
Copyright
1980,
Shure
Brothers
Inc.
27A1489
(TD)
(OVER)
MODEL
515SB-GI8
CONNECTIONS
The microphones are low impedance for connec-
tion to microphone inputs rated at 19 to
300
ohms.
The balanced line low-impedance connection is rec-
ommended where long cable lengths are
required or
under conditions of severe hum disturbance. The
permissible cable length is practically unlimited, since
neither response nor level is appreciably affected.
With reference to Figure
2,
BLACK and RED are the
"hot" conductors for balanced line connections to a
low-impedance amplifier, the shield is connected to
the amplifier ground. For unbalanced low-impedance
operation, the shield and RED lead should be con-
nected together. The BLACK lead is then the "hot"
lead. The
GREEN
and WHITE conductors are used to
control an external relay or control circuit. It should
be noted that hum susceptibility is increased in un-
balanced low-impedance operation.
BUTTON
MOVEMENT
.;-CODED
TERMINAL
GREEN
- - -
- -
-
-
-
-
-
-
-
-.
'
BLACK
,
!
:
RED
&
-------
____-_
PHASING:
POSITIVE
PRESSURE
ON
DIAPHRAGM
SHALL
CAUSE
A
POSITIVE
VOLTAGE ON
THE
RED
CONDUCTOR
INTERNAL
CONNECTIONS
FllGURE
2
Shure Model A95 Series Line Matching Transformers
are available for use in those cases where a
low-imped-
ance microphone line is desirable but the associated
amplifier has a high-impedance input. These trans-
formers provide a proper impedance match between a
19-300 ohm microphone line and
a
high-impedance
input, and are available with various input and output
connectors.
U.S.
Patents
3,132,713
and
3,240,883
Printed
in
U.S.A.