Shure 577B manual Circuit Modification, Specifications, Certification, Supplied Accessory

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

Dimensions

See Figure 3

14 mm	45 mm
(9/16 IN.)	(1-25/32 IN.)

8 mm (5/16 IN.)

	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

94 mm (3-11/16 IN.)

19 mm (3/4 IN.)

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)

41 mm (1-19/32 IN.)

67 mm
(2-5/8 IN.)	18 mm	4.8 mm
	(23/32 IN.)	(3/16 IN.)

MICROPHONE

+10

dB 0

–10

20	50	2	3	4 5 6 789	2	3	4 5 6 789
		100		1000			10000 20000

Hz

TYPICAL FREQUENCY RESPONSE

FIGURE 2

9.1mm

(23/64 IN.)

46 mm (1-13/16 IN.)

36.5 mm

(1-7/16 IN.)

MOUNTING HOLES,

CLEARANCE FOR

No. 8 SCREWS

10.3 mm (13/32 IN.)

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®

9.5 mm	4.7 mm	34.5 mm
	(3/16 IN.)
(3/8 IN.)		(1-23/64 IN.)

MOUNTING BRACKET

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.

	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:
2	Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414
	Asia, Pacific:

Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055