Shure 520 User Guide
222 HARTREY AVE.. EVANSTON, I L. 60204 U.S.A.
AREA CODE312/328-9000 CABLE: SHUREMICRO
@
CONTROLLED MAGNETIC MICROPHONE
GENERAL
The Model 520 microphone is a pressure operated
unit using the balanced armature, controlled magnetic
principle. The microphone is a rugged unit with smooth
response and an omnidirectional pickup pattern.
The die-cast metal case is streamlined for improved
acoustical performance and modern appearance. The
microphone is suitable for mounting on desk or floor
stands with
The Model 520 is provided with an attached
(7
ft) single-conductor shielded cable.
The Model 520 microphone is suitable for public
address, tape recording, paging systems, amateur
communications, and similar applications. It may be
used with all standard high-impedance public address
amplifiers.
This microphone is unusually rugged and practically
immune to severe moisture and temperature conditions.
5h"-27 threads.
2.lm
APPLICATIONS
MODEL
"GREEN
1
520
BULLET"
CONNECTIONS
Model 520 is a high-impedance microphone suitable
for use with amplifiers with high-impedance microphone inputs. For connection to high-impedance in-
puts, the BLACK cable lead is the "hot" conductor;
the shield is connected to the amplifier or chassis
ground. In certain amplifiers, the grid bias is obtained
by having a grid leak between grid and cathode. When
TY pe
Controlled magnetic
Frequency Response
100 to 9,000 Hz (See Figure A)
such amplifiers are used with any controlled magnetic
or dynamic microphones, it is recommended that a
coupling condenser be connected between the micro-
phone and the input grid. The condenser should be
.O1 mfd or larger.
If cable lengths greater than that supplied with the
Model 520 are desired, single-conductor shielded
cable may be used. Cable lengths over
7.6m
(25
ft)
will result in some loss of high-frequency response.
d
Z
1
i
I
,
>
C
w
=
-10
-20
I0
O
20
X)
IMPORTANT
Shure Microphone cables are selected after ex-
haustive tests to insure superior performance in microphones because of low capacities, superior shielding
properties and unusually long life under severe use.
Cables with plastic insulation should not be subjected to excessive soldering-iron heat. Carefully clean
and tin the conductors and the connections to which
the conductors are to be soldered. The soldering
operation can then be done with a minimum of heat,
thereby avoiding any possibility of damage to the
Polar Pattern
Omnidirectional
Impedance
Microphone impedance is High for connection
high-impedance amplifier inputs
Output Level
Open Circuit Voltage
cable. (0 dB = 1
SPECIFICATIONS
100
FREWENCY
IN
lW0
HERTZ
FREQUENCY RESPONSE
FIGURE A
(at 1,000 Hz)
.
. . . . . . .
. . . .
-54 dB (2.0 mV)
volt per microbar)
10,000 20WO
Copyright
27A41
(OA)
1953,
Shure Brothers
Inc.
(OVER)
Printed in
U.S.A.
Cable
Attached 2.lm
(7
ft) single-conductor shielded
Net Weight
340 grams
(%
Ib) with attached cable
Case
Metallic green and chrome finished
Dimensions
See Figure
(15/16
IN.)
I3
DIMENSIONS
FIGURE
(2-5/16 IN.)
B
Shipping Weight
680 grams
Deskstand
Floor Stand
Cartridge
This Shure product is guaranteed in normal use to
be free from electrical and mechanical defects for a
period of one year from the date of purchase. Please
retain proof of purchase date. This guarantee includes
all
parts and labor.
Carefully repack the unit and return it prepaid to
the factory. If outside the United States, return the
unit to your dealer or Authorized Shure Service Center
for repair. The unit will be returned to you prepaid.
(1%
Ib)
OPTIONAL ACCESSORIES
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REPLACEMENT PARTS
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GUARANTEE
SHIPPING INSTRUCTIONS
S37A
MSl OC
R5
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