Shure 577B - Manual (Page 2)

2
CIRCUIT MODIFICATION
To modify the microphone circuit for normally shorted operation,
proceed as follows:
1. Remove the three No. 6 Phillips screws from the back of the
microphone case.
2. Separate the front and back sections of the case, and remove
the press-to-talk switch button.
3. Unsolder or clip the GREEN cable lead from the press-to-talk
switch solder lug.
4. Solder the GREEN cable lead to the GREEN cartridge lead on
the press-to-talk switch solder lug.
5. Replace the press-to-talk switch button in the front section of
the case, then join the case halves together and install the No.
6 Phillips screws removed in Step 1 above.
SPECIFICATIONS
Type
Dynamic, noise-canceling
Frequency Response
100 to 5,000 Hz (see Figure 2)
TYPICAL FREQUENCY RESPONSE
FIGURE 2
Impedance (at 1000 Hz)
Rated at 150 Ω (175 Ω actual) for connection to microphone
inputs rated at 19 to 300 Ω.
Output Level (at 1,000 Hz, 5/16 in.)
Open Circuit Voltage-66.0 dBV/Pa (0.5 mV)
0 dB = 1 volt per 1 Pascal/94 dB SPL
Hum Sensitivity
Equivalent to 32 dB SPL in 1 millioersted field
Operating Temperature Range
-40° to 74° C (-40° to 165° F)
Switch Type
Double-pole, single-throw, leaf-type, push-to-talk
Cable
Non-detachable. 1.8 m (6 ft), neoprene-jacketed coil cord,
four-conductor (two conductors shielded).
Case
Two-tone gray, high-impact ARMO-DUR ®
Dimensions
See Figure 3
OVERALL DIMENSIONS
FIGURE 3
Net Weight
330 grams (11.6 oz)
CERTIFICATION
Eligible to bear CE Marking. Conforms to European EMC Directive
89/336/EEC. Meets applicable tests and performance criteria in
European Standard EN55103 (1996) parts 1 and 2, for residential
(E1) and light industrial (E2) environments.
SUPPLIED ACCESSORY
Mounting Bracket (3 per kit) .......................................... RK6MB
REPLACEMENT PARTS
Cartridge ........................................................................... R98B
Cable .................................................................................. C117
Switch............................................................................ RK338S
SERVICE INFORMATION
For additional service or parts information, please contact Shure's
Service department at 1-800-516-2525. Outside the United States,
please contact your authorized Shure Service Center.
20 20000 1000 10000 50 100
9 8 7 6 5 4 3 2 9 8 7 6 5 4 3 2
+10
0
–10
Hz
B
d
MICROPHONE
MOUNTING BRACKET
46 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
67 mm
(2-5/8 IN.)
94 mm
(3-11/16 IN.)
45 mm
(1-25/32 IN.)
8 mm
(5/16 IN.)
14 mm
(9/16 IN.)
41 mm
(1-19/32 IN.)
19 mm
(3/4 IN.)
18 mm
(23/32 IN.)
4.8 mm
(3/16 IN.)
SHURE Incorporated http://www.shure.com
United States, Canada, Latin America, Caribbean:
5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.
Phone: 847-600-2000 U.S. Fax: 847-600-1212 Intl Fax: 847-600-6446
Europe, Middle East, Africa:
Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414
Asia, Pacific:
Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055