MODEL 527B
Dynamic Communications Microphone
The 527B microphone is an extremely reliable dy-
namic hand-held microphone with an extended low- and
high-frequency response particularly suited to ham radio
use, mobile FM transmission, and top-quality paging sys-
tems. The microphone has a clear, crisp, and natural voice
reponse. It features professional design, small size, light
weight, and modular construction.
The modular construction of the 527B accounts for its
tremendous ease of field serviceability. The cartridge,
switch, and cable are a modular design, which makes
them easily replaceable. The microphone is wired so that
the wires will not crimp or break.
The unit fits naturally and comfortably in the hand and
is not affected by heat or humidity. The exclusive
ARMO-DUR
R
case is immune to oil, grease, fumes, salt
spray, sun, rust, and corrosion and is outstanding in its
ability to withstand mechanical shocks and vibrations. The
“Million-Cycle” leaf-type switch is double-pole, single-
throw, designed to withstand severe operating conditions
and constant usage.
30 mm
36.5 mm
4.7 mm
34.5 mm
10.3 mm
9.5 mm
9.1 mm
(23/64 IN.)
(3/8 IN.)
(1 13/16 IN.)
(1-7/16 IN.)
(3/16 IN.)
(1-23/64 IN.)
(13/32 IN.)
MOUNTING HOLES,
CLEARANCE FOR
No. 8 SCREWS
MOUNTING BRACKET
FIGURE 1
Features
D
Extended low- and high-frequency reponse
D
Highly intelligible voice reponse
D
Unparalleled ruggedness and reliability
D
Moving coil (dynamic) element
D
ARMO-DUR case
D
“Million-Cycle” leaf-type switch controlling micro-
phone and external relay or switching circuits
D
Modular construction for easy field service
D
“Lifetime” hang-up button and mounting bracket
D
Long-life neoprene-jacketed coil cord
APPLICATIONS
The 527B microphone is highly recommended for all
types of mobile communications, ham radios, industrial
and commercial paging systems, outdoor public address
systems. The 527B is a low-impedance microphone and
is recommended where long cable lengths are required.
INSTALLATION
A mounting bracket for permanent installation is sup-
plied with each microphone. The bracket has mounting
holes with clearance for No. 6 or No. 8 screws (see
Figure 1).
CONNECTIONS
The internal switch connections of the 527B are
shown in Figure 2. The 527B has a four-conductor, coiled
cord cable and a double-pole, single-throw, leaf-type
switch to control the microphone circuit and an external
relay or switching circuit. The WHITE and GREEN leads
are the audio conductors for balanced-line connection to
the microphone circuit; the shield is connected to the mi-
crophone circuit ground. The microphone circuit of the
switch is normally open, but can easily be modified for nor-
mally shorted operation.
CARTRIDGE
SWITCH
CABLE
BLACK
RED
GREEN
WHITE
BLACK
BUTTON MOVEMENT
+
INTERNAL CONNECTIONS
FIGURE 2
Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
Model 527B User Guide
27A2083 (SF)
E
1998, Shure Brothers Incorporated
Printed in U.S.A.
